:root {
  --navy: #0c2340;
  --navy-2: #15395f;
  --blue: #1c63b7;
  --blue-light: #e9f2fc;
  --ink: #172231;
  --muted: #667386;
  --line: #dfe5ec;
  --surface: #ffffff;
  --page: #f4f7fa;
  --green: #19744a;
  --green-bg: #e9f7f0;
  --red: #b33b3b;
  --red-bg: #fff0f0;
  --amber: #8a6215;
  --amber-bg: #fff7df;
  --shadow: 0 10px 28px rgba(19, 43, 70, 0.08);
  --radius: 18px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--page);
}

button, select, input { font: inherit; }
button { cursor: pointer; }

.app-shell { min-height: 100vh; }

.topbar {
  height: 86px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(22px, 4vw, 64px);
  background: var(--navy);
  color: #fff;
  border-bottom: 4px solid #2b78c7;
}

.brand { display: flex; align-items: center; gap: 14px; }
.brand-mark {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 13px;
  background: #fff;
  color: var(--navy);
  font-weight: 900;
  letter-spacing: -0.04em;
}
.brand h1 { margin: 0; font-size: clamp(18px, 2vw, 24px); letter-spacing: -0.02em; }
.brand p { margin: 3px 0 0; color: #bfcde0; font-size: 13px; }
.topbar-actions { display: flex; gap: 10px; align-items: center; }
.version-pill { padding: 7px 11px; border: 1px solid rgba(255,255,255,.22); border-radius: 999px; color: #dbe8f7; font-size: 12px; }
.icon-button { width: 38px; height: 38px; border-radius: 10px; border: 1px solid rgba(255,255,255,.22); background: transparent; color: #fff; font-size: 21px; }
.icon-button:hover { background: rgba(255,255,255,.09); }

.page-grid {
  width: min(1440px, calc(100% - 40px));
  margin: 30px auto 60px;
  display: grid;
  grid-template-columns: 330px minmax(0, 1fr);
  gap: 26px;
  align-items: start;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.control-panel { padding: 24px; position: sticky; top: 22px; }
.panel-heading { margin-bottom: 22px; }
.eyebrow { display: block; font-size: 11px; font-weight: 800; letter-spacing: .11em; text-transform: uppercase; color: var(--blue); }
.panel-heading h2, .progress-header h2 { margin: 6px 0 0; font-size: 21px; letter-spacing: -.02em; }

.field { display: grid; gap: 7px; margin-bottom: 15px; }
.field > span { font-size: 12px; font-weight: 750; color: #4c5969; }
select, input[type="number"], input[type="text"] {
  width: 100%;
  border: 1px solid #ccd6e1;
  background: #fff;
  color: var(--ink);
  border-radius: 11px;
  padding: 11px 12px;
  outline: none;
}
select:focus, input:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(28, 99, 183, .12); }
.two-column-fields { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }

.primary-button, .secondary-button {
  border: 0;
  border-radius: 11px;
  padding: 12px 16px;
  font-weight: 800;
  transition: transform .12s ease, background .12s ease, border-color .12s ease;
}
.primary-button { width: 100%; display: flex; justify-content: space-between; align-items: center; background: var(--blue); color: white; }
.primary-button:hover { background: #14579f; transform: translateY(-1px); }
.secondary-button { background: #fff; color: var(--navy); border: 1px solid #cbd6e2; }
.secondary-button:hover { background: #f5f8fb; }

.source-note { margin-top: 18px; padding: 15px; border-radius: 12px; background: #f2f6fb; border: 1px solid #dbe5f0; }
.source-note strong { font-size: 12px; }
.source-note p { font-size: 11.5px; line-height: 1.55; color: var(--muted); margin: 6px 0 0; }

.stats-grid { margin-top: 18px; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); padding-top: 18px; }
.stats-grid div { text-align: center; border-right: 1px solid var(--line); }
.stats-grid div:last-child { border-right: 0; }
.stats-grid strong { display: block; font-size: 20px; color: var(--navy); }
.stats-grid span { display: block; margin-top: 3px; color: var(--muted); font-size: 10.5px; }

.practice-column { display: grid; gap: 22px; }
.question-card { min-height: 470px; padding: clamp(24px, 4vw, 42px); }
.empty-state { min-height: 390px; display: grid; place-items: center; align-content: center; text-align: center; padding: 30px; }
.empty-icon { width: 72px; height: 72px; display: grid; place-items: center; border-radius: 20px; background: var(--blue-light); color: var(--blue); font-size: 42px; }
.empty-state h2 { margin: 20px 0 8px; font-size: 27px; }
.empty-state p { max-width: 520px; margin: 0 0 22px; color: var(--muted); line-height: 1.6; }
.empty-state .secondary-button { width: auto; }

.question-meta { display: flex; flex-wrap: wrap; gap: 8px; }
.meta-pill, .difficulty-pill { display: inline-flex; align-items: center; min-height: 28px; padding: 5px 9px; border-radius: 999px; font-size: 11px; font-weight: 800; }
.meta-pill { background: var(--blue-light); color: #1b5a9d; }
.meta-pill.muted { background: #f0f2f5; color: #5b6777; }
.difficulty-pill { margin-left: auto; background: var(--amber-bg); color: var(--amber); }
.question-number-row { display: flex; justify-content: space-between; margin-top: 22px; color: var(--muted); font-size: 12px; }
.question-prompt { max-width: 900px; margin: 16px 0 12px; font-size: clamp(21px, 2.4vw, 29px); line-height: 1.35; letter-spacing: -.025em; }
.question-details { color: #455263; line-height: 1.65; font-size: 15px; }
.question-details table { margin-top: 16px; border-collapse: collapse; min-width: 300px; }
.question-details th, .question-details td { padding: 8px 13px; border: 1px solid var(--line); text-align: left; font-size: 13px; }

.figure-wrap { margin: 22px 0; padding: 18px; border: 1px solid var(--line); border-radius: 14px; background: #fafcfe; overflow-x: auto; }
.figure-wrap svg { display: block; width: min(100%, 720px); height: auto; margin: 0 auto; }

.answer-area { margin-top: 26px; display: grid; gap: 11px; }
.option-row { position: relative; display: flex; align-items: flex-start; gap: 12px; padding: 14px 16px; border: 1px solid #d5dee8; border-radius: 12px; background: #fff; cursor: pointer; transition: border-color .12s ease, background .12s ease; }
.option-row:hover { border-color: #9db8d4; background: #f9fbfd; }
.option-row input { margin-top: 3px; accent-color: var(--blue); }
.option-letter { flex: 0 0 auto; width: 25px; height: 25px; display: grid; place-items: center; border-radius: 7px; background: #eef3f8; font-size: 11px; font-weight: 900; color: #46586d; }
.option-text { line-height: 1.45; }
.option-row.selected { border-color: var(--blue); background: #f1f7fd; }
.option-row.correct-choice { border-color: #69ad8b; background: var(--green-bg); }
.option-row.incorrect-choice { border-color: #d98888; background: var(--red-bg); }
.numeric-entry { max-width: 360px; display: grid; grid-template-columns: 1fr auto; align-items: stretch; }
.numeric-entry input { border-radius: 11px 0 0 11px; }
.unit-box { display: grid; place-items: center; padding: 0 15px; border: 1px solid #ccd6e1; border-left: 0; border-radius: 0 11px 11px 0; background: #f5f7f9; color: var(--muted); font-size: 13px; font-weight: 700; }
.matching-grid { display: grid; grid-template-columns: minmax(160px, 1fr) minmax(180px, 1fr); gap: 10px 14px; align-items: center; }
.match-label { padding: 11px 12px; border-radius: 10px; background: #f4f7fa; font-size: 13px; font-weight: 700; }
.question-actions { display: flex; gap: 10px; margin-top: 25px; }
.question-actions .primary-button, .question-actions .secondary-button { width: auto; min-width: 155px; justify-content: center; }

.result-card { padding: 28px 32px; }
.result-header { display: flex; align-items: center; gap: 14px; }
.result-icon { width: 48px; height: 48px; display: grid; place-items: center; border-radius: 50%; font-size: 25px; font-weight: 900; }
.result-card.correct .result-icon { color: var(--green); background: var(--green-bg); }
.result-card.incorrect .result-icon { color: var(--red); background: var(--red-bg); }
.result-header h2 { margin: 3px 0 0; font-size: 23px; }
.result-summary { color: #4d5a6a; line-height: 1.6; }
.solution-block { margin-top: 22px; padding: 20px 22px; border-radius: 13px; background: #f7f9fb; border: 1px solid var(--line); }
.solution-block h3 { margin: 0 0 10px; font-size: 15px; }
.solution-block ol { margin: 0; padding-left: 20px; color: #465464; line-height: 1.7; }
.reference-block { margin-top: 16px; display: flex; justify-content: space-between; gap: 18px; align-items: center; padding: 16px 18px; border: 1px solid #cfe0f2; border-radius: 12px; background: #f2f7fc; }
.reference-block strong { display: block; margin-top: 4px; color: var(--navy); }
.reference-block p { margin: 4px 0 0; color: var(--muted); font-size: 12px; }
.reference-tag { flex: 0 0 auto; padding: 7px 10px; border-radius: 8px; background: var(--navy); color: #fff; font-size: 11px; font-weight: 800; }

.progress-card { padding: 26px 30px; }
.progress-header { display: flex; justify-content: space-between; gap: 20px; align-items: end; }
.muted-text { color: var(--muted); font-size: 11px; }
.section-progress { margin-top: 20px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 11px 22px; }
.progress-row { display: grid; grid-template-columns: minmax(0,1fr) 50px; gap: 10px; align-items: center; }
.progress-copy { min-width: 0; }
.progress-name { display: flex; justify-content: space-between; gap: 10px; font-size: 11.5px; margin-bottom: 5px; }
.progress-name span:first-child { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; font-weight: 650; }
.progress-name span:last-child { color: var(--muted); }
.progress-track { height: 7px; border-radius: 999px; background: #e8edf2; overflow: hidden; }
.progress-fill { height: 100%; width: 0; border-radius: inherit; background: var(--blue); transition: width .25s ease; }
.progress-percent { text-align: right; font-size: 11px; font-weight: 800; color: #4f5c6b; }

.toast { position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); padding: 11px 15px; border-radius: 10px; background: #172231; color: #fff; box-shadow: 0 10px 25px rgba(0,0,0,.18); font-size: 13px; z-index: 100; }
.hidden { display: none !important; }

@media (max-width: 980px) {
  .page-grid { grid-template-columns: 1fr; width: min(760px, calc(100% - 28px)); }
  .control-panel { position: static; }
  .section-progress { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  .topbar { height: auto; padding: 15px 16px; }
  .brand p { display: none; }
  .version-pill { display: none; }
  .page-grid { margin-top: 16px; width: calc(100% - 20px); gap: 14px; }
  .control-panel, .question-card, .result-card, .progress-card { padding: 20px; }
  .two-column-fields { grid-template-columns: 1fr; }
  .question-meta { align-items: flex-start; }
  .difficulty-pill { margin-left: 0; }
  .question-number-row { margin-top: 17px; }
  .question-prompt { font-size: 21px; }
  .matching-grid { grid-template-columns: 1fr; }
  .question-actions { flex-direction: column; }
  .question-actions .primary-button, .question-actions .secondary-button { width: 100%; }
  .reference-block { align-items: flex-start; flex-direction: column; }
  .progress-header { align-items: flex-start; flex-direction: column; gap: 7px; }
}

/* v1.1 additions */
.top-nav{display:flex;gap:6px;align-items:center}.nav-link{color:#dbe8f7;text-decoration:none;padding:8px 10px;border-radius:9px;font-size:12px;font-weight:800}.nav-link:hover,.nav-link.active{background:rgba(255,255,255,.11);color:#fff}.profile-select{width:auto;min-width:120px;padding:8px 30px 8px 10px;border-color:rgba(255,255,255,.24);background:#15395f;color:#fff;font-size:12px}.site-footer{width:min(1440px,calc(100% - 40px));margin:0 auto 24px;display:flex;justify-content:center;gap:10px;flex-wrap:wrap;color:var(--muted);font-size:11px}.site-footer a{color:var(--blue);font-weight:800;text-decoration:none}.reference-path span{font-weight:650}.ai-tutor-block{margin-top:18px;padding:18px;border:1px solid #d8e4ef;border-radius:13px;background:#fbfdff}.ai-tutor-head{display:flex;justify-content:space-between;gap:15px;align-items:center}.ai-tutor-head h3{margin:4px 0 0;font-size:16px}.integration-pill{font-size:10px;font-weight:850;padding:6px 9px;border-radius:999px;background:#eef3f8;color:#526174}.tutor-prompts{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}.tutor-prompts button{border:1px solid #cbd8e5;background:#fff;color:var(--navy);border-radius:9px;padding:8px 10px;font-size:11px;font-weight:750}.tutor-thread{display:grid;gap:8px;margin-top:12px}.tutor-message{padding:10px 12px;border-radius:10px;background:#f2f6fb;font-size:12px}.tutor-message.user{background:#edf6ff}.tutor-message strong{font-size:10px;text-transform:uppercase;letter-spacing:.08em}.tutor-message p{margin:4px 0 0;line-height:1.5}.tutor-form{display:grid;grid-template-columns:1fr auto;gap:8px;margin-top:12px}.tutor-form .secondary-button{padding:10px 14px}
.progress-page{width:min(1180px,calc(100% - 40px));margin:30px auto 60px;display:grid;gap:22px}.dashboard-card{padding:26px 30px}.dashboard-stats{display:grid;grid-template-columns:repeat(5,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:12px;overflow:hidden;margin-top:20px}.dashboard-stats div{background:#fff;padding:18px;text-align:center}.dashboard-stats strong{display:block;font-size:24px;color:var(--navy)}.dashboard-stats span{display:block;margin-top:4px;font-size:10px;color:var(--muted)}.exam-builder{display:grid;grid-template-columns:2fr 160px 1.5fr auto;gap:12px;align-items:end;margin-top:20px}.exam-builder .field{margin:0}.exam-builder .primary-button{min-width:190px}.compact-note{font-size:11px!important;margin:16px 0 0!important}.exam-list{display:grid;gap:12px;margin-top:20px}.empty-list{padding:24px;text-align:center;border:1px dashed #c9d5e1;border-radius:12px;color:var(--muted)}.empty-list p{margin:6px 0 0}.exam-card{display:grid;grid-template-columns:1fr auto;gap:20px;align-items:center;padding:18px;border:1px solid var(--line);border-radius:13px}.exam-card-title{display:flex;justify-content:space-between;gap:12px;align-items:center}.exam-card-title h3{margin:0;font-size:16px}.exam-card-title span{font-size:10px;font-weight:800;color:var(--muted)}.exam-card p{margin:6px 0 10px;color:var(--muted);font-size:11px}.exam-card-actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.text-button{border:0;background:transparent;color:var(--blue);font-size:11px;font-weight:800;padding:8px}.text-button.danger{color:var(--red)}.exam-workspace-head{display:flex;justify-content:space-between;gap:18px;align-items:flex-start}.exam-workspace-head h2{margin:5px 0}.exam-progress-summary{display:grid;grid-template-columns:80px 1fr auto;gap:15px;align-items:center;margin-top:18px}.exam-progress-summary>div:first-child strong{display:block;font-size:24px}.exam-progress-summary>div:first-child span{font-size:10px;color:var(--muted)}.progress-track.large{height:10px}.exam-nav{display:flex;gap:6px;overflow-x:auto;padding:16px 0 8px;margin-top:10px}.exam-nav-btn{flex:0 0 36px;height:36px;border-radius:9px;border:1px solid #cfd9e3;background:#fff;color:#4a5869;font-size:11px;font-weight:800}.exam-nav-btn.current{outline:2px solid var(--blue);outline-offset:1px}.exam-nav-btn.answered-correct{background:var(--green-bg);border-color:#8bc1a5;color:var(--green)}.exam-nav-btn.answered-incorrect{background:var(--red-bg);border-color:#e0a0a0;color:var(--red)}.exam-question{margin-top:18px;padding-top:22px;border-top:1px solid var(--line)}.mini-result{margin-top:20px;padding:18px;border-radius:12px;border:1px solid var(--line)}.mini-result.correct{background:var(--green-bg);border-color:#acd4bf}.mini-result.incorrect{background:var(--red-bg);border-color:#e5b1b1}.mini-result h3{margin:0 0 8px}.mini-result p,.mini-result li,.reference-line{font-size:12px;line-height:1.6}.reference-line{margin-top:12px;padding-top:10px;border-top:1px solid rgba(0,0,0,.08)}.legal-page{width:min(850px,calc(100% - 40px));margin:34px auto 60px;padding:36px}.legal-page h2{font-size:30px;margin:7px 0 20px}.legal-page h3{margin:26px 0 8px;font-size:17px}.legal-page p{line-height:1.75;color:#465464}.legal-note{margin-top:30px;padding:16px;border-radius:12px;background:#f3f6f9;color:var(--muted);font-size:12px;font-weight:700}
@media(max-width:900px){.topbar{height:auto;padding-top:14px;padding-bottom:14px;gap:14px;flex-wrap:wrap}.topbar-actions{flex-wrap:wrap;justify-content:flex-end}.dashboard-stats{grid-template-columns:repeat(2,1fr)}.exam-builder{grid-template-columns:1fr 1fr}.exam-builder .primary-button{min-width:0}.exam-card{grid-template-columns:1fr}.exam-progress-summary{grid-template-columns:70px 1fr}.exam-progress-summary .muted-text{grid-column:1/-1}.tutor-form{grid-template-columns:1fr}}
@media(max-width:620px){.top-nav{order:3;width:100%}.profile-select{max-width:140px}.site-footer,.progress-page,.legal-page{width:calc(100% - 20px)}.dashboard-card,.legal-page{padding:20px}.dashboard-stats{grid-template-columns:1fr 1fr}.exam-builder{grid-template-columns:1fr}.exam-card-title{align-items:flex-start;flex-direction:column}.exam-workspace-head{flex-direction:column}.tutor-prompts{display:grid;grid-template-columns:1fr 1fr}.tutor-form{grid-template-columns:1fr}.ai-tutor-head{align-items:flex-start;flex-direction:column}}

/* v1.2 exam workspace */
.exam-nav-pager{display:grid;grid-template-columns:44px minmax(0,1fr) 44px;gap:10px;align-items:center;margin-top:18px}.exam-nav{display:grid;grid-template-columns:repeat(10,minmax(36px,1fr));gap:6px;overflow:visible;padding:0;margin:0}.exam-nav-arrow{height:42px;border:1px solid #c7d4e2;border-radius:10px;background:#fff;color:var(--navy);font-size:26px;font-weight:800;line-height:1}.exam-nav-arrow:disabled{opacity:.35;cursor:not-allowed}.exam-nav-range{text-align:center;margin-top:7px;color:var(--muted);font-size:10px;font-weight:750}.exam-mode-grid{display:grid;grid-template-columns:minmax(260px,34%) minmax(0,1fr);gap:18px;margin-top:18px;align-items:start}.card-inner{border:1px solid var(--line);border-radius:13px;background:#fbfcfe}.reference-library{padding:18px;position:sticky;top:18px}.reference-library-head{display:flex;justify-content:space-between;gap:12px;align-items:flex-start}.reference-library-head h3{margin:4px 0 0;font-size:16px}.reference-help{margin:10px 0 16px;color:var(--muted);font-size:11px;line-height:1.55}.compact-field{margin-top:11px}.manual-scope-label{margin:12px 0 8px;padding:8px 10px;border-radius:9px;background:#eef5fb;color:var(--navy);font-size:10px;font-weight:850}.manual-results{display:grid;gap:7px;max-height:430px;overflow:auto;padding-right:3px}.manual-result{width:100%;text-align:left;border:1px solid #d9e2eb;background:#fff;border-radius:9px;padding:10px 11px;color:var(--text)}.manual-result strong,.manual-result span,.manual-result small{display:block}.manual-result strong{font-size:11px;color:var(--navy)}.manual-result span{margin-top:3px;font-size:11px}.manual-result small{margin-top:5px;color:var(--muted);font-size:9.5px;line-height:1.35}.manual-result.expanded{border-color:#8db8df;background:#f2f8fd}.manual-empty{padding:14px;border:1px dashed #cbd7e2;border-radius:9px;color:var(--muted);font-size:11px;line-height:1.45}.reference-index-note{margin:12px 0 0;padding-top:10px;border-top:1px solid var(--line);font-size:9.5px;line-height:1.45;color:var(--muted)}.exam-mode-grid .exam-question{margin-top:0;padding:20px;border:1px solid var(--line);border-radius:13px;background:#fff}.exam-mode-grid .question-prompt{font-size:22px}
@media(max-width:980px){.exam-mode-grid{grid-template-columns:1fr}.reference-library{position:static}.exam-nav{grid-template-columns:repeat(5,minmax(38px,1fr));}.exam-nav-pager{grid-template-columns:44px minmax(0,1fr) 44px}}
@media(max-width:620px){.exam-nav{grid-template-columns:repeat(5,minmax(34px,1fr));gap:5px}.exam-nav-btn{width:100%;min-width:0}.exam-mode-grid .exam-question{padding:16px}.reference-library{padding:15px}}

/* v1.3 exam timing + supplied branding */
.brand-icon{width:48px;height:48px;border-radius:13px;object-fit:cover;display:block;flex:0 0 auto}
.exam-builder{grid-template-columns:1.7fr 145px 1.35fr 1.25fr 130px auto}
.exam-head-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap;justify-content:flex-end}
.exam-timer{min-width:150px;padding:9px 13px;border:1px solid #aac5df;border-radius:11px;background:#eef6fd;text-align:center;color:var(--navy)}
.exam-timer span{display:block;font-size:9px;font-weight:850;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.exam-timer strong{display:block;margin-top:2px;font-size:20px;font-variant-numeric:tabular-nums;letter-spacing:.03em}
.exam-timer.timer-warning{background:var(--amber-bg);border-color:#e4c46a;color:var(--amber)}
.exam-timer.timer-urgent{background:var(--red-bg);border-color:#e0a0a0;color:var(--red)}
.exam-ended-note{padding:18px;border:1px solid #e3b0b0;border-radius:11px;background:var(--red-bg);color:var(--red);font-size:12px;font-weight:750;line-height:1.5}
@media(max-width:1150px){.exam-builder{grid-template-columns:1fr 1fr 1fr}.exam-builder .primary-button{min-width:0}.exam-head-actions{justify-content:flex-start}}
@media(max-width:700px){.exam-builder{grid-template-columns:1fr}.exam-timer{width:100%}.exam-head-actions{width:100%}.exam-head-actions .secondary-button{width:100%}.brand-icon{width:44px;height:44px;border-radius:11px}}

/* v1.4 testing-environment redesign */
.brand-home{color:inherit;text-decoration:none}.brand-home:focus-visible{outline:2px solid #fff;outline-offset:4px;border-radius:12px}
.progress-page{width:min(1440px,calc(100% - 32px))}
.exam-builder{grid-template-columns:1.7fr 145px 1.35fr 1.25fr 130px}
.exam-create-fullbleed{margin:20px -30px -26px}.exam-create-button{width:100%;min-height:54px;border-radius:0 0 14px 14px;justify-content:center;font-size:13px;letter-spacing:.02em}
.exam-environment{border:1px solid #aab7c5;background:#fff;box-shadow:0 6px 22px rgba(28,45,65,.11);overflow:hidden}.exam-environment-titlebar{min-height:58px;padding:10px 16px;background:#155ea8;color:#fff;display:flex;align-items:center;justify-content:space-between;gap:14px}.exam-environment-titlebar strong,.exam-environment-titlebar span{display:block}.exam-environment-titlebar strong{font-size:13px;letter-spacing:.025em}.exam-environment-titlebar span{margin-top:2px;font-size:10px;color:rgba(255,255,255,.78)}.exam-env-tools{display:flex;align-items:center;gap:8px}.exam-tool-button{min-height:36px;border:1px solid rgba(255,255,255,.55);border-radius:4px;background:rgba(255,255,255,.08);color:#fff;padding:7px 11px;font-size:11px;font-weight:800}.exam-tool-button:hover{background:rgba(255,255,255,.16)}
.exam-environment .exam-workspace-head{padding:14px 16px;background:#f4f6f8;border-bottom:1px solid #b8c2cc;align-items:center}.exam-environment .exam-workspace-head h2{font-size:18px;margin:3px 0}.exam-environment .exam-progress-summary{margin:0;padding:10px 16px;background:#fff;border-bottom:1px solid #cbd3db}.exam-environment .exam-nav-pager{margin:0;padding:10px 16px 4px;background:#eef1f4;border-bottom:0}.exam-environment .exam-nav-range{margin:0;padding:3px 16px 9px;background:#eef1f4;border-bottom:1px solid #bdc6d0}.exam-environment .exam-nav-btn,.exam-environment .exam-nav-arrow{border-radius:3px}.exam-environment .exam-nav-btn.current{background:#155ea8;color:#fff;outline:0;border-color:#155ea8}.exam-environment .exam-mode-grid{grid-template-columns:minmax(330px,42%) minmax(0,1fr);gap:0;margin:0;align-items:stretch;min-height:580px}.exam-environment .reference-library{position:static;border:0;border-right:1px solid #aeb9c4;border-radius:0;background:#f7f8f9;padding:0}.exam-environment .reference-library-head{padding:12px 14px;background:#e4e8ed;border-bottom:1px solid #bac4ce;align-items:center}.exam-environment .reference-library-head h3{font-size:14px}.exam-environment .reference-help{padding:10px 14px;margin:0;background:#fff;border-bottom:1px solid #d0d7de}.exam-environment .reference-library .field{padding:0 14px;margin-top:10px}.exam-environment .reference-library .field select,.exam-environment .reference-library .field input{border-radius:3px;background:#fff}.exam-environment .manual-scope-label{margin:10px 14px 8px;border-radius:3px;background:#dfeaf5}.exam-environment .manual-results{padding:0 14px;max-height:440px}.exam-environment .manual-result{border-radius:3px}.exam-environment .reference-index-note{margin:12px 14px 14px}.exam-environment .exam-question{border:0;border-radius:0;padding:22px 28px 28px;background:#fff;min-height:580px}.exam-environment .exam-question .question-prompt{font-size:20px;line-height:1.45}.exam-environment .option-row{border-radius:3px}.exam-environment .primary-button,.exam-environment .secondary-button{border-radius:4px}.exam-environment .mini-result{border-radius:4px}.exam-environment .exam-timer{border-radius:3px;background:#fff;box-shadow:none}.exam-environment .exam-head-actions .secondary-button{background:#fff}
.exam-environment:fullscreen{width:100%;height:100%;overflow:auto;background:#e9edf1}.exam-environment:fullscreen .exam-mode-grid{min-height:calc(100% - 220px)}.exam-environment:fullscreen .exam-question{min-height:calc(100% - 220px)}
@media(max-width:980px){.exam-environment .exam-mode-grid{grid-template-columns:1fr}.exam-environment .reference-library{border-right:0;border-bottom:1px solid #aeb9c4}.exam-environment .exam-question{min-height:auto}.exam-builder{grid-template-columns:1fr 1fr}.exam-create-fullbleed{margin-left:-30px;margin-right:-30px}}
@media(max-width:620px){.progress-page{width:calc(100% - 16px)}.exam-create-fullbleed{margin:18px -20px -20px}.exam-create-button{border-radius:0 0 12px 12px}.exam-environment-titlebar{align-items:flex-start;flex-direction:column}.exam-env-tools,.exam-tool-button{width:100%}.exam-environment .exam-question{padding:18px 16px}.exam-environment .exam-mode-grid{min-height:0}}

/* v1.7 authenticated account indicator */
.account-pill {
  border: 1px solid rgba(12, 35, 64, 0.16);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.9);
  color: #0c2340;
  font: inherit;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 0.48rem 0.72rem;
  cursor: pointer;
  max-width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.account-pill:hover { background: #fff; }
.account-pill:focus-visible { outline: 3px solid rgba(12, 35, 64, 0.2); outline-offset: 2px; }
@media (max-width: 760px) {
  .account-pill { max-width: 135px; }
}

/* v1.8.0 cloud study + manual drills */
.study-kind-pill { background: #eef6ff; color: #164f87; }
.manual-study-page { max-width: 1280px; margin: 0 auto; padding: 1.5rem; display: grid; gap: 1.25rem; }
.manual-hero { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; padding: 1.5rem; }
.manual-hero h2 { margin: .25rem 0 .45rem; }
.manual-hero p { margin: 0; max-width: 760px; color: #617084; }
.manual-hero-stats { display: grid; grid-template-columns: repeat(2, minmax(120px, 1fr)); gap: .75rem; min-width: 280px; }
.manual-hero-stats > div { border: 1px solid rgba(12,35,64,.12); border-radius: 14px; padding: 1rem; background: #f8fafc; display: grid; gap: .2rem; }
.manual-hero-stats strong { font-size: 1.45rem; color: #0c2340; }
.manual-hero-stats span { font-size: .78rem; color: #68778a; }
.manual-study-grid { display: grid; grid-template-columns: minmax(260px, 330px) minmax(0, 1fr); gap: 1.25rem; align-items: start; }
.manual-drill-column { display: grid; gap: 1rem; }
.manual-drill-prompt { font-weight: 700; color: #33465b; margin: .5rem 0 1rem; }
.manual-catalog-search { max-width: 560px; margin: 1rem 0; }
.manual-catalog { display: grid; gap: .75rem; }
.manual-catalog-card { border: 1px solid rgba(12,35,64,.12); border-radius: 14px; background: #fff; overflow: hidden; }
.manual-catalog-card summary { cursor: pointer; padding: 1rem 1.1rem; display: flex; justify-content: space-between; align-items: center; gap: 1rem; list-style: none; }
.manual-catalog-card summary::-webkit-details-marker { display: none; }
.manual-catalog-card summary > div { display: grid; gap: .2rem; }
.manual-catalog-card summary strong { color: #0c2340; }
.manual-catalog-card summary span { font-size: .8rem; color: #6b798a; }
.manual-catalog-items { border-top: 1px solid rgba(12,35,64,.09); background: #f8fafc; padding: .8rem 1.1rem 1rem; display: grid; grid-template-columns: repeat(auto-fit, minmax(240px,1fr)); gap: .45rem .9rem; }
.manual-catalog-items span { font-size: .85rem; color: #40536a; }
#syncStatus { white-space: nowrap; }
@media (max-width: 900px) {
  .manual-study-grid { grid-template-columns: 1fr; }
  .manual-hero { align-items: flex-start; flex-direction: column; }
  .manual-hero-stats { min-width: 0; width: 100%; }
}

/* v1.9.1 private R2 reference viewer */
.reference-viewer-shell{display:flex;flex-direction:column;min-height:680px;overflow:hidden}.reference-tabs{display:grid;grid-template-columns:1fr 1fr;border-bottom:1px solid #aeb9c4;background:#eef2f6}.reference-tab{border:0;border-right:1px solid #c6d0da;background:#dfe6ed;color:#36526d;padding:10px 12px;font-weight:800;font-size:11px;text-align:left}.reference-tab:last-child{border-right:0}.reference-tab.active{background:#fff;color:#0c5b91;box-shadow:inset 0 -3px 0 #1682bd}.reference-controls{background:#f7f8f9;padding-bottom:8px;border-bottom:1px solid #cfd7df}.compact-tool{padding:6px 9px;font-size:10px}.pdf-viewer-toolbar{display:flex;align-items:center;gap:8px;padding:8px 12px;background:#eef2f6;border-bottom:1px solid #c1cad4;font-size:10px}.pdf-viewer-toolbar label{display:flex;align-items:center;gap:6px;font-weight:800}.pdf-viewer-toolbar input{width:72px;padding:6px 7px;border:1px solid #aebac6;border-radius:3px;background:#fff}.small-button{padding:6px 10px;min-height:auto}.pdf-viewer-toolbar .muted-text{margin-left:auto;font-size:9px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.pdf-viewer-frame-wrap{background:#7c7f82;min-height:470px;flex:1}.pdf-viewer-frame{display:block;width:100%;height:620px;border:0;background:#fff}.reference-viewer-shell:fullscreen{background:#eef2f6;width:100%;height:100%;padding:0}.reference-viewer-shell:fullscreen .pdf-viewer-frame-wrap{min-height:0;flex:1}.reference-viewer-shell:fullscreen .pdf-viewer-frame{height:calc(100vh - 300px)}
.exam-environment .reference-controls .field{padding:0 14px}.exam-environment .reference-controls .manual-results{max-height:150px}.exam-environment .pdf-viewer-frame{height:560px}.exam-environment .reference-viewer-shell{min-height:760px}.exam-environment .manual-results{max-height:150px}
@media(max-width:980px){.pdf-viewer-frame{height:520px}.reference-viewer-shell{min-height:650px}.exam-environment .reference-viewer-shell{min-height:650px}}
@media(max-width:620px){.reference-tabs{grid-template-columns:1fr}.reference-tab{border-right:0;border-bottom:1px solid #c6d0da}.pdf-viewer-toolbar{flex-wrap:wrap}.pdf-viewer-toolbar .muted-text{width:100%;margin-left:0}.pdf-viewer-frame{height:440px}}

/* v1.9.3 reference-drill answer feedback */
.option-row.correct-answer {
  border-color: #20845b;
  background: rgba(32,132,91,.08);
}
.option-row.incorrect-answer {
  border-color: #b84a4a;
  background: rgba(184,74,74,.07);
}

/* v1.10 manual exams + private library */
.manual-exam-fields{grid-column:1/-1;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;padding:16px;border:1px solid var(--line);border-radius:14px;background:var(--soft,#f7f9fc)}
.manual-exam-fields.hidden{display:none}
.manual-exam-help{grid-column:1/-1;color:var(--muted);font-size:.92rem;line-height:1.45}
.manual-exam-fields select[multiple]{min-height:150px;padding:8px}
.library-page{max-width:1600px;margin:0 auto;padding:26px}
.library-status{align-self:center;padding:12px 16px;border:1px solid var(--line);border-radius:999px;color:var(--muted)}
.library-grid{display:grid;grid-template-columns:minmax(260px,360px) minmax(0,1fr);gap:20px;margin-top:20px;align-items:start}
.library-browser,.library-viewer{padding:22px}
.library-manual-list{display:grid;gap:8px;margin-top:14px;max-height:760px;overflow:auto}
.library-manual-button{width:100%;text-align:left;border:1px solid var(--line);background:#fff;border-radius:12px;padding:13px 14px;display:grid;gap:4px;cursor:pointer;color:inherit}
.library-manual-button span{font-size:.82rem;color:var(--muted)}
.library-manual-button.active{border-color:#2b6fc4;background:#eef6ff}
.library-viewer-head{display:flex;justify-content:space-between;gap:16px;align-items:flex-start}
.library-controls{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:18px}
.library-controls .field:last-child{grid-column:1/-1}
.library-results{max-height:230px;overflow:auto;margin:14px 0}
.library-pdf-wrap{min-height:720px}
.library-pdf-wrap .pdf-viewer-frame{min-height:720px}
@media (max-width:900px){.manual-exam-fields{grid-template-columns:1fr}.manual-exam-help{grid-column:1}.library-grid{grid-template-columns:1fr}.library-controls{grid-template-columns:1fr}.library-controls .field:last-child{grid-column:auto}.library-page{padding:14px}.library-pdf-wrap,.library-pdf-wrap .pdf-viewer-frame{min-height:560px}}

/* v1.11 exam builder, manual reference exams, and library workspace */
.exam-builder-v111{display:block;margin-top:20px}
.exam-builder-v111 .exam-name-field{max-width:100%;margin:0 0 16px}
.exam-builder-row{display:grid;grid-template-columns:1.35fr 1fr 1.25fr .85fr 1.15fr;gap:12px;align-items:end}
.exam-builder-row .field{margin:0;min-width:0}
.custom-time-v111{max-width:220px;margin-top:12px!important}
.manual-exam-fields{margin-top:16px;grid-template-columns:repeat(3,minmax(0,1fr));padding:18px}
.manual-filter-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px;min-width:0}
.manual-all-check{display:flex;align-items:center;gap:9px;font-weight:850;color:var(--navy);font-size:14px;min-height:34px}
.manual-all-check input,.manual-check-option input{width:18px;height:18px;accent-color:var(--blue);flex:0 0 auto}
.manual-filter-card details{margin-top:8px;border-top:1px solid var(--line);padding-top:10px}
.manual-filter-card summary{cursor:pointer;color:var(--blue);font-weight:800;font-size:12px}
.manual-check-list{display:grid;gap:7px;max-height:230px;overflow:auto;padding:10px 2px 2px}
.manual-check-option{display:flex;align-items:flex-start;gap:8px;font-size:12px;line-height:1.35;color:#33465b}
.manual-check-option:has(input:disabled){opacity:.48}
.exam-mode-grid.manual-exam-workspace{grid-template-columns:1fr}
.exam-mode-grid.manual-exam-workspace .exam-question{border-left:0;min-height:520px}

.library-page-v111{max-width:1800px;padding:18px 22px 30px}
.library-workspace-v111{grid-template-columns:minmax(300px,390px) minmax(0,1fr);gap:16px;margin-top:0;align-items:stretch}
.library-control-panel{padding:20px;position:sticky;top:12px;align-self:start;max-height:calc(100vh - 24px);overflow:auto}
.library-control-panel .panel-heading p{line-height:1.45;margin:6px 0 18px}
.library-control-panel .field{margin-bottom:13px}
.library-open-reference{width:100%;justify-content:center;margin-top:2px}
.library-control-divider{height:1px;background:var(--line);margin:18px 0}
.field-label{display:block;font-size:12px;font-weight:800;color:#445366;margin-bottom:7px}
.library-search-row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px}
.library-search-row input{width:100%;min-width:0;border:1px solid #c8d4e0;border-radius:9px;padding:11px 12px;font:inherit}
.library-search-help{font-size:10px!important;line-height:1.4;margin:7px 0 0!important}
.library-results{max-height:270px;margin:10px 0 0;overflow:auto}
.library-page-control{padding:0;background:transparent;border:0}
.library-status-inline{display:grid;gap:5px;margin-top:12px;color:var(--muted);font-size:10px;line-height:1.4}
.library-viewer-v111{padding:16px;min-width:0}
.library-viewer-v111 .library-viewer-head{padding:2px 4px 12px}
.library-viewer-v111 .library-viewer-head h2{margin:5px 0 2px}
.library-viewer-v111 .library-pdf-wrap{min-height:820px;border-radius:8px;overflow:hidden}
.library-viewer-v111 .library-pdf-wrap .pdf-viewer-frame{height:820px;min-height:820px}
@media(max-width:1200px){.exam-builder-row{grid-template-columns:1fr 1fr 1fr}.manual-exam-fields{grid-template-columns:1fr 1fr}.manual-exam-help{grid-column:1/-1}.library-workspace-v111{grid-template-columns:320px minmax(0,1fr)}}
@media(max-width:900px){.exam-builder-row{grid-template-columns:1fr 1fr}.manual-exam-fields{grid-template-columns:1fr}.library-workspace-v111{grid-template-columns:1fr}.library-control-panel{position:static;max-height:none}.library-viewer-v111 .library-pdf-wrap,.library-viewer-v111 .library-pdf-wrap .pdf-viewer-frame{min-height:600px;height:600px}}
@media(max-width:620px){.exam-builder-row{grid-template-columns:1fr}.library-page-v111{padding:10px}.library-search-row{grid-template-columns:1fr}.library-search-row .secondary-button{width:100%}}


/* v1.13.0 exam-size/timing clarity */
.exam-availability-note{margin:14px 0 0;padding:14px 18px;border:1px solid var(--border,#d7e0ea);border-radius:14px;display:flex;gap:10px 18px;align-items:flex-start;flex-wrap:wrap;background:#f8fafc}.exam-availability-note strong{color:#10233d}.exam-availability-note span{color:#5b6b80}.exam-availability-warning{border-color:#e6c56f;background:#fff9e8}.exam-availability-warning strong{color:#7a5600}.exam-create-button:disabled{opacity:.55;cursor:not-allowed}
.bank-question-card .exam-card-main{min-width:0}.bank-question-card h3{font-size:1rem;line-height:1.45}.bank-question-card ol{margin:.65rem 0;padding-left:1.5rem}.bank-question-card .exam-card-actions{align-self:flex-start}
.bank-question-card ol{list-style:none;padding-left:.75rem}.bank-question-card ol li{margin:.3rem 0}

/* v1.14.0 admin + question quality */
.question-prompt,.bank-prompt{white-space:pre-line}
.bank-prompt{font-size:1.05rem;font-weight:750;line-height:1.55;max-width:75ch}
.admin-shortcuts{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:18px}
.admin-shortcut{border:1px solid var(--border,#d7e0eb);background:var(--surface,#fff);border-radius:14px;padding:18px;text-align:left;color:inherit;text-decoration:none;display:flex;flex-direction:column;gap:6px;cursor:pointer}
.admin-shortcut strong{font-size:1.05rem}.admin-shortcut span{color:var(--muted,#64748b);font-size:.92rem}
.admin-user-list{display:grid;gap:12px;margin-top:18px}.admin-user-card{border:1px solid var(--border,#d7e0eb);border-radius:14px;padding:16px;display:flex;align-items:center;justify-content:space-between;gap:18px;background:#fff}.admin-user-heading{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.admin-user-metrics{display:flex;gap:14px;flex-wrap:wrap;margin:8px 0;color:#42546a;font-size:.9rem}.warning-pill{background:#fff3cd;color:#7a5600}.admin-control-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(180px,.45fr);gap:14px}.admin-note-field{grid-column:1/-1}.admin-note-field textarea{width:100%;resize:vertical}.admin-detail-stats{margin:18px 0}.admin-table-wrap{overflow-x:auto;margin:10px 0 22px}.admin-table{width:100%;border-collapse:collapse}.admin-table th,.admin-table td{padding:10px 12px;border-bottom:1px solid #e4eaf1;text-align:left;vertical-align:top}.admin-table th{font-size:.8rem;text-transform:uppercase;letter-spacing:.04em;color:#64748b}.admin-page .dashboard-card{scroll-margin-top:16px}
@media(max-width:800px){.admin-shortcuts,.admin-control-grid{grid-template-columns:1fr}.admin-user-card{align-items:flex-start;flex-direction:column}.admin-user-card .secondary-button{width:100%}}

/* v1.15 admin quality-control and background builder */
.admin-fix-draft{margin-top:12px;padding:12px;border:1px solid #bfd4ea;border-radius:9px;background:#f0f7ff}.admin-fix-draft>strong{display:block;color:var(--navy)}.admin-fix-draft .fix-changes{margin:6px 0 12px}.admin-fix-draft .fix-preview{max-height:240px;overflow:auto;padding:10px;background:#fff;border:1px solid var(--line);border-radius:8px}.admin-fix-draft details{margin:10px 0}.admin-fix-draft summary{cursor:pointer;color:var(--navy);font-weight:700}.admin-fix-draft textarea{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px;line-height:1.45;min-height:180px}
.ai-figure-comparison{display:grid;grid-template-columns:1fr;gap:6px;margin-top:12px}.ai-figure-comparison>strong:not(:first-child){margin-top:10px}.ai-figure-comparison .figure-wrap{margin:0}.ai-figure-comparison .generated-problem-diagram svg{max-height:360px}
.bank-ai-fix{flex:1 1 100%;margin-top:8px;padding:12px;border:1px solid #bfd4ea;border-radius:9px;background:#f8fbff}.bank-ai-fix>summary{cursor:pointer;color:var(--navy);font-weight:800}.bank-ai-fix textarea{width:100%;resize:vertical}.bank-ai-fix .source-note{margin:8px 0}
.admin-question-audit{margin-top:16px;padding:16px;border:1px solid var(--line);border-radius:12px;background:#f8fafc}.admin-audit-head{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:12px}.admin-audit-head span{font-size:10px;color:var(--muted);font-weight:750}.admin-question-audit textarea{width:100%;resize:vertical}.admin-ai-insight{margin-top:12px;padding:12px;border-radius:9px;background:#fff;border:1px solid var(--line);font-size:11px;line-height:1.55;color:var(--text)}.admin-ai-insight p{margin:6px 0}.admin-ai-insight ul{margin:8px 0 0;padding-left:18px}.admin-reset-box{flex:1 1 100%;margin-top:10px;padding:14px;border:1px solid var(--line);border-radius:10px;background:#fafbfd}.admin-reset-box>strong{display:block;color:var(--navy)}.admin-reset-box p{margin:4px 0 10px}.admin-reset-row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.admin-reset-row select{min-width:220px;min-height:42px;border:1px solid #c7d4e2;border-radius:8px;background:#fff;padding:0 10px}.admin-review-trigger{border-color:#8db8df}
@media(max-width:620px){.admin-audit-head{align-items:flex-start;flex-direction:column}.admin-reset-row>*{width:100%}.admin-reset-row select{min-width:0}}

/* v1.19.0 — NCEES-style section review */
.review-flag-button{border:1px solid var(--border,#d8e1ec);background:#fff;border-radius:10px;padding:.72rem 1rem;font:inherit;font-weight:700;cursor:pointer;color:var(--text,#172235)}
.review-flag-button.active{border-color:#d79a22;background:#fff8e8;color:#7a4c00}
.exam-nav-btn.flagged-review{box-shadow:inset 0 0 0 2px #d79a22}
.section-review-screen{width:100%;padding:clamp(.2rem,1vw,1rem)}
.section-review-screen h2{margin:.25rem 0 .45rem}
.review-legend{display:flex;flex-wrap:wrap;gap:.6rem 1.1rem;margin:1rem 0;color:var(--muted,#5d6a7c);font-size:.92rem}
.section-review-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(175px,1fr));gap:.7rem;margin:1rem 0 1.4rem}
.section-review-item{display:flex;flex-direction:column;align-items:flex-start;gap:.28rem;text-align:left;border:1px solid var(--border,#d8e1ec);background:#fff;border-radius:12px;padding:.85rem .95rem;cursor:pointer;color:inherit}
.section-review-item:hover{border-color:#7aa5dd;transform:translateY(-1px)}
.section-review-item span{font-size:.84rem;color:var(--muted,#5d6a7c)}
.section-review-item.answered{border-left:5px solid #2c8a57}
.section-review-item.unanswered{border-left:5px solid #aeb9c6}
.section-review-item.flagged{background:#fff9ec;border-top-color:#e6bd66;border-right-color:#e6bd66;border-bottom-color:#e6bd66}
@media(max-width:700px){.section-review-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.review-legend{display:grid}}

/* v1.19.0 persistent NCEES-style exam navigation + review mode */
.exam-bottom-nav{position:sticky;bottom:0;z-index:12;margin:28px -28px -28px;padding:10px 14px;min-height:54px;border-top:1px solid #aeb9c4;background:#eef3f7;display:flex;justify-content:flex-end;align-items:center;gap:8px;box-shadow:0 -4px 12px rgba(24,49,77,.08)}
.exam-bottom-nav .review-flag-button,.exam-bottom-nav .secondary-button,.exam-bottom-nav .primary-button,.exam-review-button{min-height:36px;border-radius:3px}
.exam-review-button{border:1px solid #155ea8;background:#fff;color:#155ea8;padding:8px 13px;font-weight:800;cursor:pointer}
.exam-review-button:hover{background:#e9f2fb}
.answer-submit-row{display:flex;justify-content:flex-end;margin-top:18px}.admin-exam-actions{display:flex;gap:8px;align-items:center;margin-top:16px;padding-top:12px;border-top:1px dashed #c9d2dc}
.feedback-toggle.active{background:#fff;color:#155ea8;border-color:#fff}
.section-review-screen{padding:6px 4px 70px}.section-review-screen>h2{margin-bottom:6px}.section-review-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:10px;margin:22px 0}.section-review-item{min-height:68px;padding:10px 12px;border:1px solid #bcc7d2;background:#fff;border-radius:4px;text-align:left;cursor:pointer;display:flex;flex-direction:column;gap:5px}.section-review-item.answered{border-left:5px solid #2f7d4a}.section-review-item.flagged{box-shadow:inset 0 0 0 2px #d79a22}.section-review-item.unanswered{border-left:5px solid #8b97a5}.section-review-item strong{font-size:13px}.section-review-item span{font-size:11px;color:#5c6b7a}.section-review-screen .question-actions{position:sticky;bottom:0;z-index:12;margin:24px -32px -28px;padding:12px 18px;border-top:1px solid #aeb9c4;background:#eef3f7;justify-content:flex-end}
@media(max-width:900px){.section-review-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.exam-bottom-nav{margin-left:-16px;margin-right:-16px;flex-wrap:wrap}.exam-bottom-nav>*{flex:1 1 auto}}
@media(max-width:560px){.section-review-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}

/* v1.20.1 uniform bottom-right exam navigation */
.exam-bottom-nav{
  justify-content:flex-end;
  flex-wrap:nowrap;
}
.exam-bottom-nav .exam-bottom-button{
  width:auto;
  min-width:0;
  min-height:42px;
  padding:9px 15px;
  display:inline-flex;
  justify-content:center;
  align-items:center;
  gap:6px;
  flex:0 0 auto;
  background:#fff;
  color:var(--navy);
  border:1px solid #cbd6e2;
  border-radius:4px;
  font-weight:800;
  white-space:nowrap;
}
.exam-bottom-nav .exam-bottom-button:hover:not(:disabled){
  background:#f5f8fb;
}
.exam-bottom-nav .review-flag-button.active{
  border-color:#d79a22;
  background:#fff8e8;
  color:#7a4c00;
}
@media(max-width:900px){
  .exam-bottom-nav{justify-content:flex-end;flex-wrap:wrap}
  .exam-bottom-nav .exam-bottom-button{flex:0 0 auto;width:auto}
}

/* v1.22.0 — fixed exam controls + resizable reference/question panes */
.exam-environment .exam-mode-grid{
  --reference-pane-width:42%;
  grid-template-columns:minmax(280px,var(--reference-pane-width)) 8px minmax(0,1fr);
  gap:0;
}
.exam-split-divider{
  position:relative;
  width:8px;
  min-height:100%;
  cursor:col-resize;
  background:#d9e2ea;
  border-left:1px solid #b5c0ca;
  border-right:1px solid #b5c0ca;
  z-index:5;
  touch-action:none;
}
.exam-split-divider span{
  position:sticky;
  top:50%;
  display:block;
  width:4px;
  height:48px;
  margin:0 auto;
  border-radius:999px;
  background:#8ea0b2;
  transform:translateY(-50%);
}
.exam-split-divider:hover,.exam-split-divider:focus{background:#c4d8ea;outline:none}
.exam-split-dragging,.exam-split-dragging *{cursor:col-resize!important;user-select:none!important}

.exam-environment .reference-viewer-shell{min-height:calc(100vh - 205px);height:calc(100vh - 205px)}
.exam-environment .reference-library-head{padding:7px 10px}
.exam-environment .reference-library-head .eyebrow{display:none}
.exam-environment .reference-library-head h3{margin:0;font-size:13px}
.exam-environment .reference-tabs{min-height:34px}
.exam-environment .reference-tab{padding:7px 9px;font-size:10px}
.exam-environment .reference-controls{display:grid;grid-template-columns:1fr 1fr;gap:6px 8px;padding:7px 9px;background:#f7f8f9}
.exam-environment .reference-controls .field{padding:0;margin:0}
.exam-environment .reference-controls .field span{font-size:9px;margin-bottom:3px}
.exam-environment .reference-controls .field:nth-of-type(3){grid-column:1/-1}
.exam-environment .reference-controls .field select,.exam-environment .reference-controls .field input{min-height:32px;padding:5px 8px;font-size:10px}
.exam-environment .manual-scope-label{grid-column:1/-1;margin:0;padding:5px 7px;font-size:9px}
.exam-environment .manual-results{grid-column:1/-1;max-height:76px;padding:0;margin:0}
.exam-environment .manual-result{padding:6px 8px}
.exam-environment .manual-result strong,.exam-environment .manual-result span{font-size:9.5px}
.exam-environment .manual-result small{font-size:8.5px;margin-top:2px}
.exam-environment .pdf-viewer-toolbar{padding:6px 9px;min-height:36px}
.exam-environment .pdf-viewer-frame-wrap{min-height:0;flex:1}
.exam-environment .pdf-viewer-frame{height:100%;min-height:420px}
.exam-environment .reference-index-note{display:none}

.exam-environment .exam-question{position:relative;min-height:calc(100vh - 205px);padding-bottom:88px}
.exam-environment .exam-bottom-nav{
  position:fixed;
  right:18px;
  bottom:0;
  left:auto;
  width:auto;
  max-width:calc(100vw - 36px);
  margin:0;
  padding:10px 12px;
  z-index:100;
  border:1px solid #b8c4d0;
  border-bottom:0;
  border-radius:7px 7px 0 0;
  background:rgba(238,243,247,.98);
  box-shadow:0 -4px 14px rgba(24,49,77,.14);
}
.exam-environment .admin-question-audit{margin-bottom:72px}

/* First-exam walkthrough: blur the workspace around one highlighted control. */
body.exam-tutorial-open{overflow:hidden}
.exam-tutorial-blurred{filter:blur(3px);pointer-events:none;user-select:none;transition:filter .15s ease}
.exam-tutorial-focus{outline:3px solid #ffbf47!important;outline-offset:4px!important;box-shadow:0 0 0 8px rgba(255,191,71,.28)!important;border-radius:7px!important;pointer-events:none!important}
#examTutorialScrim{position:fixed;inset:0;z-index:10000;background:rgba(7,22,40,.48);pointer-events:auto}
#examTutorialPanel{position:fixed;z-index:10020;left:50%;top:50%;transform:translate(-50%,-50%);width:min(620px,calc(100vw - 32px));max-height:calc(100vh - 32px);overflow:auto;padding:26px 28px;border:1px solid #b9cee3;border-radius:18px;background:#fff;color:var(--text);box-shadow:0 24px 80px rgba(5,20,38,.34)}
#examTutorialPanel h2{margin:6px 0 12px;color:var(--navy);font-size:1.65rem;line-height:1.2}
#examTutorialPanel p{margin:10px 0;color:#405165;font-size:1.03rem;line-height:1.6}
.exam-tutorial-actions{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:22px}
.exam-tutorial-actions button{min-height:46px}
@media(max-width:620px){#examTutorialPanel{width:calc(100vw - 24px);padding:21px 18px;border-radius:15px}#examTutorialPanel h2{font-size:1.35rem}#examTutorialPanel p{font-size:.96rem}.exam-tutorial-actions{display:grid;grid-template-columns:1fr}.exam-tutorial-actions button{width:100%}}
.tutorial-review-mock{margin:18px 0;padding:16px;border:1px solid #d5e0ec;border-radius:12px;background:#f8fafc;color:var(--navy,#0c2340)}
.tutorial-review-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:10px;border-bottom:1px solid #dce4ed}
.tutorial-review-heading>strong{font-size:1.02rem}.tutorial-review-heading>span{color:var(--muted,#66717d);font-size:.82rem}
.tutorial-review-mock>p{margin:11px 0!important;font-size:.9rem!important}
.tutorial-review-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:8px;margin:12px 0}
.tutorial-review-item{display:flex;flex-direction:column;gap:4px;align-items:flex-start;min-width:0;padding:10px;border:1px solid #cbd6e2;border-left:4px solid #2f7d4a;border-radius:8px;background:#fff;color:var(--navy,#0c2340);text-align:left;cursor:pointer}
.tutorial-review-item:hover,.tutorial-review-item:focus-visible{border-color:#1c63b7;box-shadow:0 0 0 2px rgba(28,99,183,.15)}
.tutorial-review-item.flagged{border-left-color:#d79a22;background:#fffaf0}.tutorial-review-item.unanswered{border-left-color:#8997a7}
.tutorial-review-item strong{font-size:.83rem}.tutorial-review-item span{color:#596a7d;font-size:.74rem}
.tutorial-review-legend{display:flex;flex-wrap:wrap;gap:12px;color:#596a7d;font-size:.79rem}
.tutorial-review-question{min-height:190px}.tutorial-review-question h3{margin:12px 0 4px}.tutorial-review-sample-answer{display:flex;justify-content:space-between;gap:12px;margin-top:18px;padding:12px;border:1px solid #dce4ed;border-radius:8px;background:#fff;font-size:.9rem}
@media(max-width:620px){.tutorial-review-mock{padding:12px}.tutorial-review-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:6px}.tutorial-review-item{padding:9px 8px}.tutorial-review-legend{gap:8px;font-size:.73rem}}

@media(max-width:980px){
  .exam-environment .exam-mode-grid{grid-template-columns:1fr}
  .exam-split-divider{display:none}
  .exam-environment .reference-viewer-shell{height:auto;min-height:620px}
  .exam-environment .pdf-viewer-frame{height:500px}
}
@media(max-width:620px){
  .exam-environment .reference-controls{grid-template-columns:1fr}
  .exam-environment .reference-controls .field:nth-of-type(3){grid-column:auto}
  .exam-environment .manual-scope-label,.exam-environment .manual-results{grid-column:auto}
  .exam-environment .exam-bottom-nav{right:8px;max-width:calc(100vw - 16px);padding:8px;gap:5px}
  .exam-bottom-nav .exam-bottom-button{padding:8px 10px;font-size:11px}
}

/* v1.22.0 — review workspace width hotfix
   Review screens and manual-reference exams intentionally remove the reference pane.
   Force the remaining question/review pane to occupy the full workspace so the
   v1.21 resizable three-column grid cannot collapse it into the 8px divider column. */
.exam-environment .exam-mode-grid.manual-exam-workspace{
  grid-template-columns:minmax(0,1fr) !important;
  gap:0 !important;
}
.exam-environment .exam-mode-grid.manual-exam-workspace .exam-split-divider{
  display:none !important;
}
.exam-environment .exam-mode-grid.manual-exam-workspace .exam-question{
  grid-column:1 / -1;
  width:100%;
  min-width:0;
  max-width:none;
  border-left:0;
}
.exam-environment .exam-mode-grid.manual-exam-workspace .section-review-screen{
  width:100%;
  max-width:none;
  min-width:0;
  box-sizing:border-box;
}
.exam-environment .exam-mode-grid.manual-exam-workspace .section-review-grid{
  width:100%;
  min-width:0;
}
@media(min-width:1200px){
  .exam-environment .exam-mode-grid.manual-exam-workspace .section-review-grid{
    grid-template-columns:repeat(5,minmax(150px,1fr));
  }
}
@media(min-width:700px) and (max-width:1199px){
  .exam-environment .exam-mode-grid.manual-exam-workspace .section-review-grid{
    grid-template-columns:repeat(3,minmax(150px,1fr));
  }
}
@media(max-width:699px){
  .exam-environment .exam-mode-grid.manual-exam-workspace .section-review-grid{
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
}

/* v1.22.0 — reference-first compact exam viewer */
.sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}
.exam-environment .reference-viewer-shell{background:#f7f8f9}
.exam-environment .reference-library-head{min-height:38px;padding:6px 10px}
.exam-environment .reference-library-head h3{font-size:12px;letter-spacing:.01em}
.exam-environment .reference-tabs{min-height:32px}
.exam-environment .reference-tab{padding:6px 9px;font-size:9.5px}
.exam-environment .reference-quickbar{display:grid;grid-template-columns:minmax(145px,1.2fr) minmax(145px,1fr) auto auto auto;gap:6px;align-items:center;padding:7px 8px;background:#f4f6f8;border-bottom:1px solid #c5ced7}
.exam-environment .reference-select-control{min-width:0}
.exam-environment .reference-select-control select{width:100%;min-width:0;height:32px;padding:4px 26px 4px 7px;border:1px solid #b8c5d1;border-radius:4px;background:#fff;color:var(--text);font-size:9.5px}
.exam-environment .reference-search-toggle,.exam-environment .reference-go-button{height:32px;min-height:32px;padding:5px 9px;white-space:nowrap;font-size:9.5px;border-radius:4px;background:#fff}
.exam-environment .reference-page-control{display:flex;align-items:center;gap:4px;color:#405165;font-size:9px;font-weight:800;white-space:nowrap}
.exam-environment .reference-page-control input{width:58px;height:32px;padding:4px 6px;border:1px solid #b8c5d1;border-radius:4px;background:#fff;font-size:10px}
.exam-environment .reference-search-drawer{padding:8px;border-bottom:1px solid #c7d1da;background:#eef3f7;box-shadow:0 5px 14px rgba(28,52,76,.08);z-index:4}
.exam-environment .reference-search-row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:6px;align-items:center}
.exam-environment .reference-search-row input{width:100%;height:34px;padding:6px 9px;border:1px solid #9fb0bf;border-radius:4px;background:#fff;font-size:10px}
.exam-environment .reference-search-row .text-button{padding:6px 8px;font-size:9.5px}
.exam-environment .reference-search-drawer .manual-scope-label{margin:7px 0 5px;padding:5px 7px;font-size:8.5px}
.exam-environment .reference-search-drawer .manual-results{max-height:155px;padding:0;margin:0;display:grid;gap:4px}
.exam-environment .reference-search-drawer .manual-result{padding:6px 8px}
.exam-environment .reference-search-drawer .manual-result strong,.exam-environment .reference-search-drawer .manual-result span{font-size:9px}
.exam-environment .reference-search-drawer .manual-result small{font-size:8px;margin-top:1px}
.exam-environment .reference-search-drawer .manual-empty{padding:8px;font-size:9px}
.exam-environment .reference-status-line{display:flex;align-items:center;min-height:24px;padding:4px 8px;background:#eef2f6;border-bottom:1px solid #c1cad4}
.exam-environment .reference-status-line .muted-text{font-size:8.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.exam-environment .pdf-viewer-frame-wrap{min-height:0;flex:1;background:#5f6265}
.exam-environment .pdf-viewer-frame{height:100%;min-height:520px}
.exam-environment .exam-mode-grid.reference-focus{--reference-pane-width:82%}
.exam-environment .exam-mode-grid.reference-focus .reference-viewer-shell{box-shadow:5px 0 18px rgba(18,42,66,.12)}
.exam-environment .exam-mode-grid.reference-focus .exam-question{min-width:240px}
@media(max-width:1180px){
  .exam-environment .reference-quickbar{grid-template-columns:minmax(135px,1fr) minmax(135px,1fr) auto auto}
  .exam-environment .reference-search-toggle{grid-column:3}
  .exam-environment .reference-page-control{grid-column:1/3;grid-row:2}
  .exam-environment .reference-go-button{grid-column:4;grid-row:1}
}
@media(max-width:980px){
  .exam-environment .reference-quickbar{grid-template-columns:1fr 1fr auto}
  .exam-environment .reference-select-control:nth-child(1){grid-column:1/2}
  .exam-environment .reference-select-control:nth-child(2){grid-column:2/3}
  .exam-environment .reference-search-toggle{grid-column:3/4}
  .exam-environment .reference-page-control{grid-column:1/3;grid-row:2}
  .exam-environment .reference-go-button{grid-column:3/4;grid-row:2}
  .exam-environment .exam-mode-grid.reference-focus{--reference-pane-width:42%}
}
@media(max-width:620px){
  .exam-environment .reference-quickbar{grid-template-columns:1fr auto}
  .exam-environment .reference-select-control:nth-child(1),.exam-environment .reference-select-control:nth-child(2){grid-column:1/-1}
  .exam-environment .reference-search-toggle{grid-column:1;grid-row:auto}
  .exam-environment .reference-page-control{grid-column:1;grid-row:auto}
  .exam-environment .reference-go-button{grid-column:2;grid-row:auto}
}


/* v1.22.1 — learner-facing cleanup + deterministic reference focus */
.student-question-meta{display:none!important}
.exam-environment .exam-mode-grid.reference-focus{
  grid-template-columns:minmax(0,82%) 8px minmax(240px,1fr)!important;
}
.exam-environment .exam-mode-grid.reference-focus .exam-question{min-width:240px}
@media(max-width:980px){
  .exam-environment .exam-mode-grid.reference-focus{grid-template-columns:1fr!important}
}

/* v1.22.3 Tutor readability: preserve clean math lines without exposing raw LaTeX syntax. */
.tutor-message p{margin:6px 0;line-height:1.6}.tutor-message ol{margin:8px 0 8px 22px;padding:0}.tutor-message li{margin:4px 0;line-height:1.55}.tutor-message code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;background:#e9f0f7;border-radius:5px;padding:1px 4px;font-size:.95em}


/* v1.23.0 practice skipping and focused manual-drill sessions. */
.manual-hero-stats{grid-template-columns:repeat(3,minmax(110px,1fr));min-width:420px}
.manual-study-grid.drill-active{grid-template-columns:minmax(0,1fr)}
.manual-study-grid.drill-active .manual-drill-column{grid-column:1/-1;width:100%}
.manual-study-grid.drill-active .question-card,.manual-study-grid.drill-active .result-card{width:100%;max-width:none}
.manual-drill-actions{align-items:center}
.manual-drill-actions .manual-end-drill{margin-left:auto}
@media(max-width:900px){.manual-hero-stats{grid-template-columns:repeat(3,minmax(0,1fr));min-width:0}.manual-drill-actions .manual-end-drill{margin-left:0}}
@media(max-width:560px){.manual-hero-stats{grid-template-columns:1fr 1fr}.manual-hero-stats>div:last-child{grid-column:1/-1}.manual-drill-actions{display:grid;grid-template-columns:1fr}.manual-drill-actions .manual-end-drill{width:100%}}

/* v1.26.0 discipline isolation */
.discipline-switcher{display:flex;align-items:center;gap:8px;padding:6px 10px;border:1px solid var(--border-color,#d7e0ea);border-radius:12px;background:var(--card-bg,#fff);font-size:.78rem;color:var(--muted,#667386);white-space:nowrap}
.discipline-switcher span{font-weight:700}
.discipline-switcher select{border:0;background:transparent;color:inherit;font:inherit;font-weight:700;outline:none;max-width:170px}
@media(max-width:760px){.discipline-switcher{width:100%;justify-content:space-between}.discipline-switcher select{max-width:none}}

/* v1.26.0 account-scoped discipline preference */
.account-page{max-width:980px;margin-inline:auto;width:100%}
.account-settings-form{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:18px}
.account-settings-form .account-discipline-field{grid-column:1/-1}
.account-settings-form .account-discipline-field small{display:block;margin-top:7px;color:var(--muted,#667386);line-height:1.45}
.account-settings-form input[type="password"],.login-form input[type="email"],.login-form input[type="password"]{width:100%;border:1px solid #ccd6e1;background:#fff;color:var(--ink);border-radius:11px;padding:11px 12px;outline:none}
.account-settings-form input[type="password"]:focus,.login-form input:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(28,99,183,.12)}
.account-password-form{align-items:start}.account-password-form .account-password-note{grid-column:1/-1;margin:0;line-height:1.5}
.login-page{width:min(560px,calc(100% - 32px));margin:clamp(32px,8vh,90px) auto 70px}
.login-card{padding:clamp(24px,5vw,42px)}.login-card h2{margin:7px 0 8px;color:var(--navy);font-size:clamp(1.65rem,4vw,2rem);letter-spacing:-.025em}.login-card>.muted-text{line-height:1.55;margin:0 0 20px}.login-form{display:grid;gap:3px}.login-form .field{margin-bottom:13px}.login-form .primary-button{margin-top:4px;justify-content:center;min-height:48px}.login-switch{margin:20px 0 0;text-align:center;color:var(--muted);font-size:14px}.login-switch .text-button{border:0;background:none;color:var(--blue);font-weight:800;padding:5px}.login-message{min-height:22px;margin:12px 0 0;color:var(--red);font-size:13px;line-height:1.5}.login-access-note{line-height:1.55}.login-back-link{display:block;margin-top:18px;text-align:center;color:var(--blue);font-size:13px;font-weight:750;text-decoration:none}
.account-actions{grid-column:1/-1;margin-top:4px}
@media(max-width:720px){.account-settings-form{grid-template-columns:1fr}.account-settings-form .account-discipline-field,.account-actions{grid-column:auto}}

/* v1.26.5 Account & Data control center */
.account-page{max-width:1180px}
.sync-badge{display:inline-flex;align-items:center;min-height:30px;padding:5px 10px;border:1px solid #d5dee8;border-radius:999px;background:#f5f7fa;color:#627083;font-size:.82rem;font-weight:700;white-space:nowrap}
.sync-badge-good{border-color:#bddbc8;background:#f1f8f3;color:#24623b}
.account-preference-grid{grid-column:1/-1;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;padding-top:2px}
.sync-status-grid,.account-summary-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:18px}
.account-summary-grid{grid-template-columns:repeat(4,minmax(0,1fr))}
.metric-tile{min-width:0;border:1px solid #dbe3ec;border-radius:13px;background:#f7f9fc;padding:15px 16px}
.metric-tile span{display:block;color:#68768a;font-size:.78rem;font-weight:700;margin-bottom:6px}
.metric-tile strong{display:block;color:var(--text,#172436);font-size:1.25rem;line-height:1.15}
.account-data-actions{margin-top:16px;flex-wrap:wrap}
.account-section-progress{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));column-gap:38px;row-gap:4px;margin-top:20px}
.account-progress-row{appearance:none;width:100%;border:0;background:transparent;padding:9px 0;text-align:left;display:grid;grid-template-columns:minmax(0,1fr) 62px;gap:16px;align-items:end;color:inherit;cursor:pointer;border-radius:9px}
.account-progress-row:hover,.account-progress-row:focus-visible{background:#f7f9fc;outline:2px solid transparent}
.account-progress-row .progress-name{font-size:.92rem}.account-progress-row .progress-percent{text-align:right;font-weight:800;color:#526176}
.account-section-detail{margin-top:18px;padding:16px 18px;border:1px solid #d6e1ed;border-radius:13px;background:#f5f8fc}
.account-section-detail>div:first-child{display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap}.account-section-detail>div:first-child span{color:#68768a}
.section-detail-stats{display:flex;gap:18px;flex-wrap:wrap;margin:12px 0 7px}.section-detail-stats span{padding:6px 9px;border-radius:8px;background:#fff;border:1px solid #dbe3ec;color:#5d6b7e;font-size:.83rem}.account-section-detail small{color:#6b788a;line-height:1.45}
.discipline-status-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:18px}.discipline-data-card{border:1px solid #dbe3ec;border-radius:14px;padding:17px;background:#f8fafc}.discipline-data-card>div{display:flex;justify-content:space-between;gap:12px}.discipline-data-card>div span{font-size:.75rem;color:#68768a;font-weight:800;text-transform:uppercase;letter-spacing:.05em}.discipline-data-card p{margin:12px 0 0;color:#526176}.discipline-data-card small{display:block;margin-top:10px;color:#68768a}
.danger-zone-card{border-color:#e6c8c8}.danger-zone-card .eyebrow{color:#a13b3b}.danger-reset-grid{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}.danger-outline{border-color:#d9a9a9;color:#8c3030}.danger-note{margin-top:12px}
@media(max-width:820px){.account-summary-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.account-section-progress{grid-template-columns:1fr}.account-preference-grid{grid-template-columns:1fr}.sync-status-grid{grid-template-columns:1fr 1fr}.discipline-status-grid{grid-template-columns:1fr}}
@media(max-width:560px){.account-summary-grid,.sync-status-grid{grid-template-columns:1fr}.account-progress-row{grid-template-columns:minmax(0,1fr) 54px}.danger-reset-grid>*{width:100%}}


/* v1.26.6 focused full-width practice-exam sessions. */
body.exam-session-active .progress-page{width:calc(100% - 16px);max-width:none;margin:8px auto 28px;gap:0}
body.exam-session-active .exam-setup-section{display:none}
body.exam-session-active #examWorkspace{width:100%;max-width:none;margin:0}
body.exam-session-active #examWorkspace.exam-environment{border-radius:0}
@media(max-width:620px){body.exam-session-active .progress-page{width:100%;margin:0 auto 20px}body.exam-session-active #examWorkspace{border-left:0;border-right:0}}

/* v1.27.0 true home, Learn, and focused Practice sessions */
.home-page{width:min(1120px,calc(100% - 40px));margin:72px auto 70px}.home-hero{text-align:center;max-width:850px;margin:0 auto 42px}.home-hero h1{font-size:clamp(2.4rem,6vw,4.7rem);line-height:1;margin:10px 0 14px;color:var(--navy)}.home-hero h2{font-size:clamp(1.05rem,2vw,1.45rem);line-height:1.5;font-weight:600;color:var(--muted);margin:0}.home-nav-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.home-nav-card{display:block;text-decoration:none;color:inherit;border:1px solid var(--line);border-radius:18px;background:#fff;padding:28px;transition:border-color .15s ease,transform .15s ease}.home-nav-card:hover{border-color:#9eb8d2;transform:translateY(-2px)}.home-nav-card h3{font-size:1.55rem;margin:5px 0 8px;color:var(--navy)}.home-nav-card p{color:var(--muted);line-height:1.6;margin:0 0 20px}.home-nav-card strong{color:var(--blue);font-size:.9rem}.home-card-kicker{font-size:.72rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);font-weight:800}
body.practice-session-active .page-grid{grid-template-columns:minmax(0,1fr);width:min(1280px,calc(100% - 40px))}body.practice-session-active #practiceSetupPanel{display:none}body.practice-session-active .practice-column{grid-column:1/-1;width:100%}body.practice-session-active .question-card,body.practice-session-active .result-card,body.practice-session-active .progress-card{max-width:none;width:100%}
.learn-page{width:min(1180px,calc(100% - 40px));margin:34px auto 70px;display:grid;gap:22px}.learn-hero{padding:30px}.learn-hero-grid{display:grid;grid-template-columns:1.5fr .7fr;gap:26px;align-items:center}.learn-hero h2{font-size:2rem;margin:6px 0 10px}.learn-hero p{color:var(--muted);line-height:1.6}.learn-progress-summary{display:grid;grid-template-columns:1fr 1fr;gap:10px}.learn-topic-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.learn-topic-card{border:1px solid var(--line);border-radius:15px;background:#fff;padding:20px;text-align:left;color:inherit;cursor:pointer}.learn-topic-card:hover{border-color:#9eb8d2}.learn-topic-head{display:flex;justify-content:space-between;gap:14px}.learn-topic-card h3{margin:0;color:var(--navy)}.learn-topic-card p{color:var(--muted);font-size:.86rem;line-height:1.5}.learn-module-list{display:grid;gap:12px;margin-top:18px}.learn-module{border:1px solid var(--line);border-radius:13px;padding:16px;background:#fbfcfe}.learn-module summary{cursor:pointer;font-weight:800;color:var(--navy)}.learn-module-body{padding-top:13px}.learn-objectives{line-height:1.6;color:#42546a}.learn-ref{padding:10px 12px;border-radius:10px;background:#eef4fa;font-size:.84rem;margin:12px 0}.checkpoint{border-top:1px solid var(--line);margin-top:14px;padding-top:14px}.checkpoint-q{margin:12px 0}.checkpoint-q label{display:block;margin:6px 0;font-size:.9rem}.learn-status{font-size:.75rem;font-weight:800;color:var(--muted)}
@media(max-width:760px){.home-page,.learn-page{width:calc(100% - 20px);margin-top:30px}.home-nav-grid,.learn-topic-grid,.learn-hero-grid{grid-template-columns:1fr}.home-nav-card{padding:22px}.learn-progress-summary{grid-template-columns:1fr 1fr}}

/* v1.27.1 practice session + generated Learn study guides */
.practice-session-toolbar{display:none;justify-content:flex-end;margin-bottom:14px}
body.practice-session-active .practice-session-toolbar{display:flex}
.learn-study-guide{margin:18px 0;padding:18px;border:1px solid var(--border);border-radius:14px;background:var(--surface-soft,#f7f9fc)}
.learn-study-guide h3,.learn-study-guide h4{margin:0 0 10px}.learn-study-guide-section{margin-top:18px}.learn-study-guide ul,.learn-study-guide ol{margin:8px 0 0;padding-left:22px}.learn-formula{padding:12px 14px;margin:10px 0;border-left:4px solid var(--accent,#1769c2);background:var(--surface,#fff);border-radius:8px}.learn-formula code{font-size:1rem;white-space:pre-wrap}.learn-formula-meta{font-size:.9rem;color:var(--muted);margin-top:5px}.learn-tutor-panel{margin-top:18px;padding-top:16px;border-top:1px solid var(--border)}.learn-tutor-thread{display:grid;gap:10px;margin:12px 0}.learn-tutor-message{padding:12px;border-radius:10px;background:var(--surface,#fff);border:1px solid var(--border)}.learn-tutor-form{display:flex;gap:10px}.learn-tutor-form input{flex:1;min-width:0}.learn-generation-state{padding:14px;border:1px dashed var(--border);border-radius:12px;margin:14px 0}.learn-checkpoint-note{margin:8px 0 14px;color:var(--muted)}

/* v1.28.0 Learn Content Bank admin */
.learn-builder-controls{align-items:end;margin-top:1rem}.learn-builder-controls .form-switch{min-height:48px;display:flex;align-items:center;gap:.65rem}.learn-admin-module-list{display:grid;gap:.65rem;margin-top:1rem}.learn-admin-module{display:flex;justify-content:space-between;align-items:center;gap:1rem;padding:.9rem 1rem;border:1px solid var(--border);border-radius:12px;background:var(--card)}.learn-admin-module>div{display:grid;gap:.2rem;min-width:0}.learn-admin-module .muted-text,.learn-admin-module small{display:block}.learn-admin-module.is-generated{border-left:4px solid var(--accent)}@media(max-width:640px){.learn-admin-module{align-items:stretch;flex-direction:column}.learn-admin-module button{width:100%}}

/* Learn Study Guide Format v2 */
.learn-guide-title{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:8px}.learn-guide-title h3{margin-top:4px}
.learn-concept{padding:12px 0;border-bottom:1px solid var(--border)}.learn-concept:last-child{border-bottom:0}.learn-concept h5{margin:0 0 5px;font-size:1rem}.learn-concept p{margin:0}
.learn-formula-v2{padding:16px 18px}.learn-formula-head>div{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.formula-class{display:inline-flex;align-items:center;width:max-content;padding:3px 8px;border:1px solid var(--border);border-radius:999px;font-size:.72rem;font-weight:700;line-height:1.2;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);background:var(--surface-soft,#f7f9fc)}.formula-primary{color:var(--accent,#1769c2);border-color:color-mix(in srgb,var(--accent,#1769c2) 35%,var(--border))}.formula-derived{font-style:italic}
.learn-equation,.worked-equation{overflow-x:auto;padding:16px 12px;margin:12px 0;border-radius:8px;background:var(--surface-soft,#f7f9fc);text-align:center}.learn-equation .katex-display,.worked-equation .katex-display{margin:.25em 0}.learn-equation .katex{font-size:1.2em}.learn-math-fallback{display:inline-block;font-size:1rem;white-space:pre-wrap;color:var(--text)}
.formula-table-wrap{overflow-x:auto;margin:10px 0}.formula-table{width:100%;border-collapse:collapse;font-size:.92rem}.formula-table th,.formula-table td{padding:8px 10px;border-bottom:1px solid var(--border);text-align:left;vertical-align:top}.formula-table th{font-size:.75rem;text-transform:uppercase;letter-spacing:.04em;color:var(--muted)}.formula-symbol{min-width:92px;white-space:nowrap}.formula-symbol .katex{font-size:1.05em}.learn-formula-meta p{margin:7px 0}.learn-formula-meta ul{margin-top:5px}
.learn-formula .formula-source{margin:10px 0;color:var(--muted);font-size:.88rem;line-height:1.45}.learn-formula .formula-source strong{color:var(--text,#253246)}
.learn-reference-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.learn-reference-item{display:flex;flex-direction:column;gap:7px;padding:13px;border:1px solid var(--border);border-radius:10px;background:var(--surface,#fff)}.learn-reference-item p,.learn-reference-item small{margin:0}.learn-reference-item small{color:var(--muted)}
.worked-givens{padding:10px 12px;margin:10px 0;border-radius:8px;background:var(--surface-soft,#f7f9fc)}.worked-steps{display:grid;gap:12px}.worked-steps li{padding-left:4px}.worked-steps p{margin:5px 0}.worked-answer{padding:12px 14px;border-left:4px solid var(--accent,#1769c2);background:var(--surface,#fff);border-radius:8px}
@media(max-width:700px){.learn-reference-grid{grid-template-columns:1fr}.formula-table th,.formula-table td{padding:7px 8px}.learn-formula-v2{padding:14px 12px}}

.question-formula-panel{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,360px),1fr));margin:18px 0;padding:16px;border:1px solid var(--border);border-radius:14px;background:var(--panel-soft,#f8fafc)}.question-formula-panel>.eyebrow{grid-column:1/-1}.question-formula-item+.question-formula-item{margin:0;padding:0 0 0 18px;border-top:0;border-left:1px solid var(--border)}.question-formula-title{display:flex;gap:10px;align-items:center;justify-content:space-between}.question-formula-title span{font-size:.75rem;text-transform:uppercase;color:var(--muted)}.question-formula-equation{overflow-x:auto;padding:12px 4px;text-align:center}.question-formula-item p{margin:8px 0 0}.question-formula-item .formula-source{color:var(--muted);font-size:.83rem;line-height:1.45}.question-formula-item .formula-source strong{color:var(--text,#253246)}.bank-question-card .question-formula-panel{max-width:900px}

/* v1.30.1 — Learn module fixed-frame / responsive overflow containment */
.learn-page,
.learn-page > *,
.learn-module-list,
.learn-module,
.learn-module-body,
.learn-study-guide,
.learn-study-guide-section,
.learn-formula,
.learn-formula-v2,
.learn-reference-grid,
.learn-reference-item,
.learn-tutor-panel,
.learn-tutor-thread,
.checkpoint {
  min-width: 0;
  max-width: 100%;
  box-sizing: border-box;
}

/* Keep the study-guide border fixed to the Learn content column. */
.learn-module,
.learn-study-guide {
  width: 100%;
  overflow: hidden;
}

/* Generated prose and long reference strings may wrap, but never widen the module. */
.learn-module-body,
.learn-study-guide,
.learn-study-guide p,
.learn-study-guide li,
.learn-study-guide small,
.learn-formula-meta,
.learn-reference-item,
.learn-tutor-message,
.checkpoint-q {
  overflow-wrap: anywhere;
  word-break: normal;
}

/* Formula cards stay inside the fixed border. Normal PE equations scale down as needed. */
.learn-equation,
.worked-equation {
  width: 100%;
  max-width: 100%;
  overflow: hidden;
  box-sizing: border-box;
}
.learn-equation .katex-display,
.worked-equation .katex-display {
  width: 100%;
  max-width: 100%;
  overflow: hidden;
}
.learn-equation .katex,
.worked-equation .katex {
  font-size: clamp(.78rem, 1.7vw, 1.2rem);
  max-width: 100%;
}
.learn-math-fallback,
.learn-formula code {
  max-width: 100%;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  word-break: break-word;
}

/* Variable tables are responsive instead of forcing the whole module sideways. */
.formula-table-wrap {
  width: 100%;
  max-width: 100%;
  overflow-x: hidden;
}
.formula-table {
  width: 100%;
  max-width: 100%;
  table-layout: fixed;
}
.formula-table th,
.formula-table td {
  min-width: 0;
  overflow-wrap: anywhere;
  word-break: normal;
}
.formula-table th:first-child,
.formula-table td:first-child { width: 18%; }
.formula-table th:nth-child(2),
.formula-table td:nth-child(2) { width: 57%; }
.formula-table th:nth-child(3),
.formula-table td:nth-child(3) { width: 25%; }
.formula-symbol {
  min-width: 0;
  white-space: normal;
}

/* Buttons and tutor controls may wrap rather than widening a module. */
.learn-study-guide .question-actions,
.learn-tutor-form,
.learn-guide-title,
.learn-formula-head > div {
  min-width: 0;
  max-width: 100%;
  flex-wrap: wrap;
}
.learn-tutor-form input {
  min-width: min(220px, 100%);
}

@media (max-width: 700px) {
  .learn-study-guide { padding: 14px 12px; }
  .learn-equation,
  .worked-equation { padding: 12px 6px; }
  .formula-table { font-size: .82rem; }
  .formula-table th:first-child,
  .formula-table td:first-child { width: 22%; }
  .formula-table th:nth-child(2),
  .formula-table td:nth-child(2) { width: 51%; }
  .formula-table th:nth-child(3),
  .formula-table td:nth-child(3) { width: 27%; }
}
.audit-control-row{display:grid;grid-template-columns:minmax(260px,520px) minmax(0,1fr);gap:18px;align-items:end;margin:20px 0 4px}.audit-speed-summary{min-height:48px;display:flex;align-items:center;color:var(--muted);font-weight:700}.admin-shortcuts{grid-template-columns:repeat(3,minmax(0,1fr))}@media(max-width:900px){.audit-control-row{grid-template-columns:1fr}.admin-shortcuts{grid-template-columns:1fr}}

.learn-admin-actions{display:flex;gap:.55rem;align-items:center;flex-wrap:wrap}.learn-admin-actions button{white-space:nowrap}@media(max-width:640px){.learn-admin-actions{display:grid;grid-template-columns:1fr}.learn-admin-actions button{width:100%}}

/* Study Guide Format v3 */
.learn-formula-v3 .formula-symbol .katex{font-size:1.08em}.worked-given-label{font-weight:600;margin-right:.35rem}.worked-final-answer{margin-top:.75rem;padding:.8rem 1rem;border-left:4px solid var(--accent);background:var(--surface-soft,#f7f9fc);font-weight:700}.checkpoint-math{margin:.6rem 0}.checkpoint-math .katex-display{margin:.2rem 0}

/* v1.34.5 account/admin organization */
.account-hero{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:12px 4px 6px}.account-hero h2{margin:5px 0 7px;font-size:clamp(1.7rem,3vw,2.35rem);color:var(--navy,#0c2340)}.account-hero p{margin:0;color:var(--muted,#5f6b78);line-height:1.55;max-width:700px}
.account-tabbar{display:flex;gap:.45rem;padding:.45rem;margin-bottom:1rem;position:sticky;top:.5rem;z-index:8;box-shadow:0 8px 24px rgba(12,35,64,.07)}
.account-tab{border:0;background:transparent;color:var(--muted,#5f6b78);font:inherit;padding:.7rem 1rem;border-radius:.75rem;cursor:pointer;text-align:left;display:grid;gap:2px;min-width:190px}.account-tab span{font-weight:850}.account-tab small{font-size:.72rem;color:inherit;font-weight:600;opacity:.82}
.account-tab.active{background:var(--navy,#0c2340);color:#fff}.account-tab:focus-visible{outline:3px solid rgba(23,105,194,.28);outline-offset:2px}
.account-section-number{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:10px;background:#eef4fa;color:#47637f;font-size:.76rem;font-weight:900;letter-spacing:.04em}
.admin-control-launcher{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:.85rem}
.admin-control-launcher .admin-shortcut{min-height:105px}
.ai-analysis-toolbar{display:grid;grid-template-columns:minmax(200px,270px) minmax(0,1fr);gap:18px;align-items:end;margin:20px 0 14px}.ai-analysis-toolbar .field,.ai-analysis-controls .field,.ai-analysis-feedback{margin:0}.ai-analysis-tabs{display:flex;gap:7px;flex-wrap:wrap}.ai-analysis-tabs button{border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--navy);padding:10px 14px;font:inherit;font-size:12px;font-weight:800;cursor:pointer}.ai-analysis-tabs button.active{background:var(--navy);border-color:var(--navy);color:#fff}.ai-analysis-area-note{padding:12px 15px;border-radius:10px;background:#f3f6f9;color:var(--muted);font-size:12px;line-height:1.55}.ai-analysis-controls{display:grid;grid-template-columns:minmax(230px,1fr) auto;gap:16px;align-items:end;margin:18px 0 12px}.ai-analysis-controls .question-actions{margin:0}.ai-analysis-feedback{margin-top:14px}.ai-analysis-feedback textarea{width:100%;resize:vertical}.ai-analysis-progress{margin:14px 0;padding:12px 14px;border-radius:10px;background:#eef5fb;color:var(--navy);font-size:12px;font-weight:800}.ai-analysis-results{display:grid;gap:12px;margin-top:18px}.ai-analysis-result{border:1px solid var(--line);border-radius:12px;background:#fff;overflow:hidden}.ai-analysis-result-head{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:12px;align-items:start;padding:15px 16px;background:#f8fafc}.ai-analysis-result-head strong{font-size:13px}.ai-analysis-result-head small{display:block;margin-top:4px;color:var(--muted);font-size:11px}.ai-analysis-result-body{padding:14px 16px}.ai-analysis-result-body p{margin:6px 0;font-size:12px;line-height:1.6}.ai-analysis-checks{display:grid;gap:8px;margin:12px 0}.ai-analysis-check{padding:10px 12px;border-left:3px solid #aebdca;background:#f8fafc;border-radius:4px;font-size:12px}.ai-analysis-check[data-status="needs-work"],.ai-analysis-check[data-status="concern"]{border-color:#d68a40}.ai-analysis-check[data-status="pass"]{border-color:#4c9a72}.ai-analysis-result-head input{margin-top:3px}.ai-analysis-improved{color:#24734f;font-size:11px;font-weight:800}.ai-analysis-result details{margin-top:10px}.ai-analysis-result summary{font-size:11px;font-weight:800;cursor:pointer;color:var(--blue)}
@media(max-width:800px){.ai-analysis-toolbar,.ai-analysis-controls{grid-template-columns:1fr}.ai-analysis-controls .question-actions{display:flex;flex-wrap:wrap}.ai-analysis-controls button{flex:1}.ai-analysis-tabs{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}.ai-analysis-tabs button:last-child{grid-column:span 2}}
.admin-shortcut.active{outline:3px solid rgba(12,35,64,.16);border-color:var(--navy,#0c2340)}
.admin-workspace-hero{display:flex;align-items:center;justify-content:space-between;gap:28px;padding:30px 32px;background:linear-gradient(135deg,#0c2340,#173f68);color:#fff;border:0}.admin-workspace-hero .eyebrow{color:#9fc7ef}.admin-workspace-hero h2{margin:5px 0 8px;font-size:1.8rem}.admin-workspace-hero p{margin:0;color:#d4e2f0;line-height:1.55;max-width:690px}.admin-workspace-hero .primary-button{background:#fff;color:#0c2340;text-decoration:none;white-space:nowrap}
#adminControlsPanel{display:grid;gap:16px}.admin-control-group{padding:0;overflow:hidden}.admin-group-heading{display:flex;align-items:flex-start;gap:14px;padding:22px 24px;border-bottom:1px solid var(--border,#d9e0e7);background:#f8fafc}.admin-group-index{display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;width:34px;height:34px;border-radius:10px;background:#e8f0f8;color:#345a7e;font-size:.72rem;font-weight:900}.admin-group-heading h3{margin:1px 0 4px;color:var(--navy,#0c2340);font-size:1.08rem}.admin-group-heading p{margin:0;color:var(--muted,#66717d);font-size:.86rem;line-height:1.45}.admin-control-list{display:grid}.admin-control-row{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:17px 24px;color:inherit;text-decoration:none;border-bottom:1px solid #e7ebf0;transition:background .15s ease}.admin-control-row:last-child{border-bottom:0}.admin-control-row:hover{background:#f6f9fc}.admin-control-row>span{display:grid;gap:4px}.admin-control-row strong{color:var(--navy,#0c2340);font-size:.96rem}.admin-control-row small{color:var(--muted,#66717d);line-height:1.4}.admin-control-row>b{font-size:1.2rem;color:#4777a5;transition:transform .15s ease}.admin-control-row:hover>b{transform:translateX(3px)}.admin-control-row:focus-visible{outline:3px solid rgba(23,105,194,.24);outline-offset:-3px}
.page-access-list{display:grid;gap:.6rem;margin-top:1rem}
.page-access-row{display:grid;grid-template-columns:minmax(220px,1fr) auto auto minmax(90px,auto);gap:1rem;align-items:center;padding:.85rem 1rem;border:1px solid var(--border,#d9e0e7);border-radius:.8rem;background:var(--card,#fff)}
.page-access-row>div{display:grid;gap:.15rem}.page-access-row small{color:var(--muted,#66717d)}
.learn-admin-title-row{display:flex;align-items:center;gap:.55rem;flex-wrap:wrap}
.format-version-badge{display:inline-flex;align-items:center;justify-content:center;border-radius:999px;padding:.18rem .48rem;font-size:.69rem;font-weight:900;letter-spacing:.04em;line-height:1.2;vertical-align:middle;background:#eef1f4;color:#4d5965;border:1px solid #d1d8df;white-space:nowrap}
.format-version-badge.is-v3{background:#e8f6ee;color:#176b3a;border-color:#a8d8ba}
.format-version-badge.is-legacy{background:#fff4df;color:#8a5a00;border-color:#ebcc8b}
@media(max-width:760px){.page-access-row{grid-template-columns:1fr auto auto}.page-access-row>.muted-text{grid-column:1/-1}.account-hero{align-items:flex-start;flex-direction:column}.account-tabbar{position:static}.account-tab{flex:1;min-width:0}.admin-workspace-hero{align-items:flex-start;flex-direction:column;padding:25px 22px}.admin-workspace-hero .primary-button{width:100%;text-align:center}.admin-group-heading,.admin-control-row{padding-left:18px;padding-right:18px}}
@media(max-width:520px){.account-tabbar{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}.account-tab{width:100%;padding:.65rem .55rem}.account-section-number{display:none}.admin-group-heading{gap:10px}.admin-control-row small{font-size:.78rem}}

/* v1.34.7 shared header consistency + mobile overflow fix */
html,body{max-width:100%;overflow-x:hidden}
.topbar,.topbar-actions,.top-nav{min-width:0}
.account-pill{text-decoration:none;display:inline-flex;align-items:center;justify-content:center}
@media(max-width:620px){
  .topbar{position:relative;width:100%;padding:14px 12px 10px;gap:10px;align-items:center;overflow:hidden}
  .brand{min-width:0;max-width:calc(100% - 148px)}
  .brand-cluster{max-width:100%;flex:1 1 100%;flex-wrap:wrap;gap:8px 12px}
  .brand>div{min-width:0}
  .brand h1{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .brand p{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .brand-icon{width:40px;height:40px;border-radius:10px}
  .topbar-actions{width:100%;max-width:100%;gap:8px;justify-content:flex-start;align-items:center;flex-wrap:wrap}
  .top-nav{order:100;width:100%;max-width:100%;display:flex;flex-wrap:nowrap;gap:4px;overflow-x:auto;overflow-y:hidden;padding:2px 0 4px;-webkit-overflow-scrolling:touch;scrollbar-width:none;overscroll-behavior-x:contain}
  .top-nav::-webkit-scrollbar{display:none}
  .top-nav .nav-link{flex:0 0 auto;white-space:nowrap}
  .account-pill{position:absolute;top:16px;right:12px;max-width:130px;min-height:38px}
  .version-pill{display:none}
  .profile-select{order:20;max-width:min(150px,52vw)}
  .topbar-actions>.icon-button{order:21}
}

/* v1.34.7 Structural Question Formula Format v3 */
.question-v3-math,.question-v3-solution-math{margin:14px 0;padding:12px 14px;border-radius:10px;background:rgba(99,102,241,.07);overflow-x:auto}.question-v3-choice-math{display:inline-block;margin-left:.35rem;vertical-align:middle}.question-v3-math .katex-display,.question-v3-solution-math .katex-display{margin:.25em 0}
.question-v3-math{position:relative;margin:22px 0 18px;padding:28px 26px 25px;border:1px solid #b9cee3;border-left:6px solid var(--blue);border-radius:14px;background:#edf4fb;color:#102b49;overflow-x:auto}.question-data-label{display:block;margin-bottom:16px;color:#365b7f;font-size:.92rem;font-weight:900;letter-spacing:.11em;text-transform:uppercase}.question-data-equation{min-width:max-content;text-align:center;font-size:2.4rem;line-height:1.5}.question-v3-math .katex-display{margin:.2em 0}.question-data-equation>.katex-display>.katex,.question-data-equation>.katex{font-size:2.4rem!important;font-weight:650}.question-data-equation .learn-math-fallback{font-size:1.8rem;font-weight:700}.bank-question-card .question-v3-math{margin-top:18px}.bank-question-card .question-data-equation>.katex-display>.katex,.bank-question-card .question-data-equation>.katex{font-size:2.4rem!important}
@media(max-width:620px){.question-v3-math{margin:18px 0 16px;padding:21px 15px 19px;border-left-width:5px}.question-data-label{margin-bottom:12px;font-size:.82rem}.question-data-equation{font-size:1.8rem}.question-data-equation>.katex-display>.katex,.question-data-equation>.katex,.bank-question-card .question-data-equation>.katex-display>.katex,.bank-question-card .question-data-equation>.katex{font-size:1.8rem!important}.question-data-equation .learn-math-fallback{font-size:1.4rem}}
.question-data-equation .katex-html{font-size:1em!important}.exam-formula-disclosure{margin:18px 0;border:1px solid #b9cee3;border-radius:10px;background:#f8fafc;overflow:hidden}.exam-formula-disclosure>summary{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:14px 16px;cursor:pointer;color:var(--navy);font-weight:850;list-style:none}.exam-formula-disclosure>summary::-webkit-details-marker{display:none}.exam-formula-disclosure>summary::before{content:'+';display:grid;place-items:center;width:24px;height:24px;border-radius:50%;background:#e1edf8;color:var(--blue);font-size:18px;line-height:1}.exam-formula-disclosure[open]>summary::before{content:'\2212'}.exam-formula-disclosure>summary span{flex:1}.exam-formula-disclosure>summary small{color:var(--muted);font-size:.72rem;font-weight:750}.exam-formula-disclosure[open]>summary{border-bottom:1px solid #d5e0ea}.exam-formula-disclosure .question-formula-panel{margin:0;border:0;border-radius:0;background:#fff}.question-formula-equation .katex-display{margin:.1em 0}.question-formula-equation .katex{font-size:1.45em}.exam-formula-disclosure .question-formula-equation{padding:8px 4px}

/* Keep exam references compact while giving the question-bank review a clearer
   equation size. These surfaces share markup, so scope the larger size to the bank. */
.question-formula-equation .katex-display > .katex,
.question-formula-equation > .katex { font-size:1.6rem !important; }
.question-formula-equation .learn-math-fallback { font-size:1.3rem; line-height:1.5; }
.bank-question-card .question-formula-equation .katex-display > .katex,
.bank-question-card .question-formula-equation > .katex { font-size:2rem !important; }
.bank-question-card .question-formula-equation .learn-math-fallback { font-size:1.7rem; }
.question-formula-panel .formula-table td:first-child .katex { font-size:1.25rem !important; }
@media(max-width:620px){
  .question-formula-panel{grid-template-columns:1fr}
  .question-formula-item+.question-formula-item{padding:14px 0 0;border-left:0;border-top:0}
  .question-formula-equation .katex-display > .katex,
  .question-formula-equation > .katex { font-size:1.4rem !important; }
  .question-formula-equation .learn-math-fallback { font-size:1.2rem; }
  .bank-question-card .question-formula-equation .katex-display > .katex,
  .bank-question-card .question-formula-equation > .katex { font-size:1.8rem !important; }
  .bank-question-card .question-formula-equation .learn-math-fallback { font-size:1.5rem; }
  .question-formula-panel .formula-table td:first-child .katex { font-size:1.15rem !important; }
}

/* v1.34.8 Structural source-tier administration */
.bank-question-disabled{opacity:.62;border-style:dashed}
#structuralBankControls .dashboard-stats{margin-top:1rem}
#structuralBankControls .exam-list{margin-top:1rem}

/* v1.35: shared navigation, accessible focus, and next-session dashboard. */
.brand-title{display:block;font-size:1.45rem;font-weight:800;letter-spacing:-.035em}
.brand-cluster{display:flex;align-items:center;gap:14px;min-width:0}.brand{flex-wrap:wrap}.discipline-indicator{display:inline-flex;align-items:center;gap:5px;flex:0 0 auto;font-size:.82rem;color:#d8e8ff;text-decoration:none;border:1px solid #657b94;border-radius:20px;padding:7px 10px;margin:0;font-weight:700;white-space:nowrap}.discipline-indicator select{max-width:190px;padding:0 18px 0 2px;border:0;outline:0;background-color:transparent;color:inherit;font:inherit;font-weight:750;cursor:pointer}.discipline-indicator select option{background:#fff;color:#172b45}.discipline-indicator select:disabled{opacity:.65;cursor:wait}
.skip-link{position:fixed;left:12px;top:-80px;z-index:9999;background:#fff;color:#12253d;padding:12px 18px;border:2px solid #2459aa;border-radius:8px}.skip-link:focus{top:12px}
:where(a,button,input,select,textarea,[tabindex]):focus-visible{outline:3px solid #d98c16;outline-offset:3px}
.mobile-menu-button{display:none}.dashboard-home{max-width:1160px;margin:40px auto}.dashboard-intro h1{font-size:clamp(2rem,4vw,3.5rem);line-height:1.1;letter-spacing:-.045em;margin:12px 0}.dashboard-intro p{color:#596b80;font-size:1.05rem}
.home-metrics{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid #dce3eb;background:white;border-radius:18px;margin:28px 0}.home-metrics>div{padding:23px 28px;border-right:1px solid #e5eaf0}.home-metrics>div:last-child{border:0}.home-metrics strong{display:block;font-size:2rem;color:#15365c}.home-metrics span{font-size:.85rem;color:#596b80}
.dashboard-home .home-nav-grid{grid-template-columns:repeat(3,1fr)}.dashboard-home .home-nav-card h2{font-size:1.3rem;margin:12px 0}.recommended-card{border-top:4px solid #3367b5}.dashboard-topics{margin:38px 0}.dashboard-topics>p,.dashboard-reference>p{color:#596b80}.topic-progress-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.topic-progress{display:grid;grid-template-columns:1fr auto;gap:8px;background:#fff;border:1px solid #dde5ee;border-radius:10px;padding:16px;text-decoration:none;color:#19314e}.topic-progress small{color:#64748b}.dashboard-reference{border-top:1px solid #dce3eb;padding:25px 0}.reference-quality{font-size:.8rem;padding:10px 12px;border-left:3px solid #b3812f;background:#fff9ed;color:#654913;margin:12px 0}
@media(max-width:760px){.topbar{align-items:flex-start}.topbar-actions{flex-wrap:wrap}.mobile-menu-button{display:block;padding:9px 13px;border:1px solid #8292a6;border-radius:8px;background:transparent;color:white;font:inherit}.top-nav{display:none!important;position:absolute;left:0;right:0;top:100%;padding:14px 20px;background:#13263f;z-index:100;flex-wrap:wrap;overflow:visible}.topbar{position:relative}.top-nav.menu-open{display:flex!important}.discipline-indicator{margin-left:0}.dashboard-home .home-nav-grid,.topic-progress-grid{grid-template-columns:1fr}.home-metrics>div{padding:16px 10px}.home-metrics strong{font-size:1.6rem}.home-metrics span{font-size:.7rem}.dashboard-home{margin:24px 12px}.brand-title{font-size:1.1rem}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}

/* v1.35.2 mobile usability overhaul */
.mobile-exam-view-tabs{display:none}
@media(max-width:760px){
  body{font-size:16px;-webkit-text-size-adjust:100%}
  .topbar{height:auto;min-height:0;display:flex;align-items:center;flex-wrap:wrap;gap:10px 12px;padding:12px 14px;overflow:visible}
  .brand{flex:1 1 auto;max-width:none;min-width:0;gap:10px;flex-wrap:nowrap}
  .brand-cluster{width:100%;flex:1 1 100%;flex-wrap:nowrap;gap:9px;overflow:hidden}
  .brand-cluster .brand{flex:0 1 auto}
  .brand-icon{width:42px;height:42px;flex:0 0 42px;border-radius:10px}
  .brand-title{font-size:1.08rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .brand p{display:none}
  .discipline-indicator{max-width:calc(100vw - 205px);margin-left:0;padding:6px 8px;font-size:.76rem}
  .discipline-indicator select{max-width:clamp(92px,32vw,150px)}
  .topbar-actions{flex:1 0 100%;width:100%;display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:8px;align-items:center;justify-content:stretch}
  .mobile-menu-button{display:inline-flex;align-items:center;justify-content:center;min-width:74px;min-height:44px;padding:9px 14px;border:1px solid #8292a6;border-radius:10px;background:transparent;color:#fff;font:inherit;font-weight:750}
  .topbar-actions>.account-pill{position:static;grid-column:2;grid-row:1;justify-self:end;width:auto;max-width:min(190px,100%);min-height:44px;padding:9px 13px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .topbar-actions>.icon-button{position:static;grid-column:3;grid-row:1;width:44px;height:44px;order:initial}
  .version-pill{display:none}
  .top-nav{display:none!important;position:static;grid-column:1/-1;grid-row:2;width:100%;margin-top:2px;padding:7px;background:#172e4b;border:1px solid rgba(255,255,255,.14);border-radius:12px;box-shadow:none;overflow:visible;flex-wrap:nowrap}
  .top-nav.menu-open{display:grid!important;grid-template-columns:1fr 1fr;gap:6px}
  .top-nav .nav-link{display:flex;align-items:center;min-height:46px;padding:10px 13px;border-radius:8px;font-size:.9rem}
  .top-nav .nav-link[aria-current="page"],.top-nav .nav-link.active{background:#fff;color:var(--navy)}

  .page-grid,.progress-page,.home-page,.dashboard-home,.learn-page,.manual-study-page,.library-page,.legal-page,.admin-page{width:calc(100% - 16px);max-width:none;margin:16px 8px 44px;gap:14px}
  .card,.dashboard-card,.control-panel,.question-card,.result-card,.progress-card,.legal-page{border-radius:14px}
  .dashboard-card,.control-panel,.question-card,.result-card,.progress-card,.legal-page{padding:18px 16px}
  .panel-heading{margin-bottom:18px}.panel-heading h2,.progress-header h2{font-size:1.3rem}
  .field{gap:8px;margin-bottom:16px}.field>span{font-size:.82rem}
  select,input[type="number"],input[type="text"],input[type="email"],input[type="date"],textarea{min-height:48px;font-size:16px;padding:11px 13px}
  button,.primary-button,.secondary-button,.text-button{min-height:44px}
  .source-note{padding:13px;margin-top:14px}
  .question-prompt,.exam-environment .exam-question .question-prompt{font-size:1.25rem;line-height:1.45}
  .question-details,.option-text{font-size:.95rem;line-height:1.55}
  .option-row{min-height:54px;padding:14px 12px}
  .question-actions{display:grid;grid-template-columns:1fr;gap:9px}.question-actions>*{width:100%!important}
  .result-card{padding-bottom:20px}.solution-block{padding:16px 14px}.reference-block{padding:14px}
  .dashboard-stats{grid-template-columns:1fr 1fr}.dashboard-stats div{padding:15px 9px}.dashboard-stats strong{font-size:1.35rem}.dashboard-stats span{font-size:.72rem}
  .site-footer{width:calc(100% - 24px);margin-bottom:24px;text-align:center}

  .home-metrics{margin:20px 0;border-radius:14px}.home-metrics>div{padding:15px 8px}.home-metrics strong{font-size:1.45rem}.home-metrics span{font-size:.7rem;line-height:1.3}
  .dashboard-intro h1{font-size:2rem}.dashboard-intro p{font-size:1rem}.home-nav-card{padding:22px 20px}.dashboard-home .home-nav-grid{gap:12px}

  .exam-create-fullbleed{margin:18px -16px -18px}.exam-create-button{min-height:56px}
  .exam-availability-note{padding:13px 14px;line-height:1.4}
  .exam-card{padding:16px}.exam-card-actions{display:grid;grid-template-columns:1fr}.exam-card-actions>*{width:100%}
  .exam-environment-titlebar{padding:13px 12px;gap:12px}.exam-env-tools{display:grid;grid-template-columns:1fr 1fr;gap:8px}.exam-tool-button{min-height:44px;font-size:.76rem}
  .exam-environment .exam-workspace-head{padding:13px 12px}.exam-head-actions{display:grid;grid-template-columns:1fr;width:100%}.exam-head-actions>*{width:100%}
  .exam-environment .exam-progress-summary{grid-template-columns:64px 1fr;padding:10px 12px}.exam-progress-summary .muted-text{grid-column:1/-1}
  .exam-environment .exam-nav-pager{padding:10px 8px 4px}.exam-nav-pager{grid-template-columns:42px minmax(0,1fr) 42px;gap:6px}.exam-nav{grid-template-columns:repeat(5,minmax(38px,1fr));gap:4px}.exam-nav-btn,.exam-nav-arrow{min-height:42px}
  .mobile-exam-view-tabs{display:grid;grid-template-columns:1fr 1fr;padding:8px;background:#dfe5ec;border-bottom:1px solid #b9c4cf;gap:6px;position:sticky;top:0;z-index:11}.mobile-exam-view-tabs.hidden{display:none}.mobile-exam-view-tabs button{min-height:44px;border:1px solid #aebbc8;border-radius:7px;background:#fff;color:var(--navy);font-weight:800}.mobile-exam-view-tabs button.active{background:#155ea8;border-color:#155ea8;color:#fff}
  .exam-mode-grid[data-mobile-view="question"]>.reference-library,.exam-mode-grid[data-mobile-view="question"]>.exam-split-divider{display:none}.exam-mode-grid[data-mobile-view="reference"]>.exam-question,.exam-mode-grid[data-mobile-view="reference"]>.exam-split-divider{display:none}.exam-mode-grid[data-mobile-view="reference"]>.reference-library{display:block}
  .exam-environment .exam-question{padding:18px 14px}.exam-bottom-nav{position:static;bottom:auto;margin:22px -14px -18px;padding:9px;display:grid;grid-template-columns:1fr 1fr;gap:7px;box-shadow:none}.exam-bottom-nav>*{width:100%!important;min-height:44px!important}.exam-bottom-nav>*:last-child:nth-child(odd){grid-column:1/-1}
  .section-review-screen .question-actions{margin-left:-14px;margin-right:-14px;padding:10px 14px}
  .reference-viewer-shell,.exam-environment .reference-viewer-shell{min-height:0}.pdf-viewer-frame,.exam-environment .pdf-viewer-frame{height:62vh;min-height:360px}

  .manual-hero-stats{grid-template-columns:1fr 1fr}.manual-study-grid{gap:14px}.manual-drill-actions{display:grid;grid-template-columns:1fr}
  .library-page-v111{padding:0}.library-workspace-v111{gap:14px}.library-control-panel{padding:18px 16px}.library-search-row{grid-template-columns:1fr}.library-search-row .secondary-button{width:100%}
  .account-hero{padding:6px 4px}.account-hero h2{font-size:1.75rem}.account-tabbar{padding:6px}.admin-workspace-hero{padding:24px 20px}
  .toast{left:12px;right:12px;bottom:12px;transform:none;text-align:center}
}

@media(max-width:420px){
  .top-nav.menu-open{grid-template-columns:1fr}
  .topbar-actions>.account-pill{max-width:170px}
  .dashboard-stats,.account-summary-grid,.sync-status-grid{grid-template-columns:1fr 1fr}
  .section-review-grid{grid-template-columns:1fr 1fr}
}

/* Persistent question audit reports */
.audit-list { display: grid; gap: 1rem; }
.audit-report-box { margin: 1rem 0; }
.audit-report-box summary { cursor: pointer; font-weight: 700; }
.audit-report-box form { display: grid; gap: .75rem; margin-top: 1rem; }
.audit-report-box button { justify-self: start; }
.audit-json { white-space: pre-wrap; overflow-wrap: anywhere; max-height: 28rem; overflow: auto; }
.audit-list .question-prompt { font-size: 1.2rem; }
.audit-list textarea { width: 100%; }
.generated-problem-diagram { margin: 1rem 0; }
.generated-problem-diagram svg { display: block; width: 100%; max-width: 800px; height: auto; margin: auto; border: 1px solid #d8e1eb; border-radius: .5rem; }
.generated-problem-diagram figcaption { margin-top: .5rem; color: #526176; font-size: .9rem; }

/* Personalized study plan */
.home-study-plan-invite,.home-study-plan{padding:clamp(22px,4vw,34px);margin:0 0 20px}.home-study-plan-invite{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:28px;align-items:center;border-color:#cbd9e7;background:linear-gradient(120deg,#fff 45%,#eef5fb)}.home-study-plan-invite h2,.home-study-plan .progress-header h2{margin:7px 0;font-size:clamp(20px,3vw,27px);color:var(--navy)}.home-study-plan-invite p{max-width:720px;margin:0;color:var(--muted);line-height:1.6}.home-study-plan-invite .primary-button{width:auto;min-width:230px}.home-study-plan-header{align-items:center}.home-plan-countdown{min-width:160px;padding:13px 17px;border:1px solid #d7e1eb;border-radius:14px;background:#f5f9fc;text-align:center}.home-plan-countdown>strong{display:block;color:var(--navy);font-size:21px}.home-plan-countdown>strong small{font-size:11px}.home-plan-countdown>span,.home-plan-countdown>small{display:block;margin-top:4px;color:var(--muted);font-size:11px}.home-plan-assessment{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:18px 0}.home-plan-assessment>div{padding:14px 16px;border-radius:12px;background:#f4f7fa}.home-plan-assessment strong{font-size:12px;color:var(--navy)}.home-plan-assessment p{margin:5px 0 0;font-size:12px;line-height:1.55;color:var(--muted)}.home-plan-assessment .study-plan-loading-track{grid-column:1/-1}.home-plan-calendar-head{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-top:26px;padding-top:20px;border-top:1px solid var(--line)}.home-plan-calendar-head h3{margin:0;color:var(--navy)}.home-plan-calendar-head p{margin:5px 0 0}.home-plan-calendar-head .question-actions{margin:0;align-items:center}.home-plan-calendar-head .secondary-button{width:auto;min-width:42px;padding:9px}.home-plan-calendar-head .text-button{white-space:nowrap}.home-plan-calendar{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:5px;margin-top:14px}.home-plan-weekday{padding:8px 3px;text-align:center;color:var(--muted);font-size:10px;font-weight:800}.home-plan-calendar-blank{min-height:68px}.home-plan-calendar-day{position:relative;min-height:68px;border:1px solid #e0e7ee;border-radius:10px;background:#fff;color:var(--ink);font-weight:700}.home-plan-calendar-day:hover{background:#f4f8fc;border-color:#aac4df}.home-plan-calendar-day.selected{outline:2px solid var(--blue);border-color:var(--blue);background:#edf5fd}.home-plan-calendar-day.today>span{color:var(--blue)}.home-plan-calendar-day.has-task::after{content:"";position:absolute;bottom:7px;left:50%;width:6px;height:6px;border-radius:50%;background:#38835f;transform:translateX(-50%)}.home-plan-calendar-day i{position:absolute;top:5px;right:6px;font-size:9px;font-style:normal;color:#38714f}.home-plan-day-events{display:grid;gap:10px;margin-top:20px}.home-plan-day-events>h3{margin:0 0 2px;font-size:17px;color:var(--navy)}.home-plan-day-events>.muted-text{margin:0}.home-plan-event{display:grid;grid-template-columns:120px minmax(0,1fr) auto;gap:14px;align-items:center;padding:14px;border:1px solid var(--line);border-radius:12px;background:#fff}.home-plan-event-date span,.home-plan-event-date strong{display:block}.home-plan-event-date span{font-size:10px;font-weight:800;color:var(--blue)}.home-plan-event-date strong{margin-top:5px;font-size:11px;color:var(--muted)}.home-plan-event-copy h4{margin:0;font-size:13px}.home-plan-event-copy p{margin:5px 0;font-size:12px;line-height:1.5;color:var(--muted)}.home-plan-event-copy small{font-size:10px;color:var(--muted)}.home-plan-event>.secondary-button{width:auto;white-space:nowrap;text-decoration:none;font-size:11px}
.study-plan-account-card{min-height:240px}.study-plan-account-content{margin-top:14px}.study-plan-empty{display:grid;grid-template-columns:64px minmax(0,1fr);gap:18px;align-items:start;padding:26px;border:1px dashed #bdcad7;border-radius:14px;background:#fbfdff}.study-plan-empty-icon{display:grid;place-items:center;width:58px;height:58px;border-radius:17px;background:#eaf3fb;color:var(--blue);font-size:31px;font-weight:800}.study-plan-empty h3,.study-plan-pending h3{margin:2px 0 8px;color:var(--navy)}.study-plan-empty p,.study-plan-pending p{max-width:760px;margin:0 0 15px;color:var(--muted);font-size:13px;line-height:1.65}.study-plan-empty .primary-button,.study-plan-pending .primary-button{width:auto}.study-plan-pending{padding:24px;border:1px solid var(--line);border-radius:14px;background:#fbfdff}.study-plan-pending .question-actions{margin-bottom:0}.study-plan-complete-head{display:flex;align-items:center;justify-content:space-between;gap:20px}.study-plan-complete-head h3{margin:12px 0 6px;color:var(--navy);font-size:21px}.study-plan-complete-head p{max-width:780px;margin:0;color:var(--muted);line-height:1.65}.study-plan-countdown-account{min-width:145px;padding:14px;border:1px solid #d8e2eb;border-radius:13px;background:#f5f9fc;text-align:center}.study-plan-countdown-account strong,.study-plan-countdown-account span{display:block}.study-plan-countdown-account strong{font-size:24px;color:var(--navy)}.study-plan-countdown-account span{margin-top:3px;font-size:10px;color:var(--muted)}.study-plan-plan-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin:20px 0}.study-plan-plan-stats>div{padding:13px;border-radius:11px;background:#f4f7fa;text-align:center}.study-plan-plan-stats strong,.study-plan-plan-stats span{display:block}.study-plan-plan-stats strong{font-size:18px;color:var(--navy)}.study-plan-plan-stats span{margin-top:4px;font-size:10px;color:var(--muted)}.study-plan-section-heading{margin:25px 0 10px;color:var(--navy);font-size:16px}.study-plan-weekly-list,.study-plan-milestone-list{display:grid;gap:9px}.study-plan-weekly-item{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:14px;border:1px solid var(--line);border-radius:12px}.study-plan-weekly-item h4{margin:5px 0;font-size:13px}.study-plan-weekly-item p{margin:4px 0;font-size:12px;line-height:1.5;color:var(--muted)}.study-plan-weekly-item small{font-size:10px;color:var(--muted)}.study-plan-weekly-item .secondary-button{width:auto;text-decoration:none;white-space:nowrap}.study-plan-milestone-list article{padding:13px 15px;border-left:3px solid #6999c6;border-radius:4px 10px 10px 4px;background:#f5f8fb}.study-plan-milestone-list article>span,.study-plan-milestone-list article>strong{display:block}.study-plan-milestone-list article>span{font-size:10px;color:var(--blue);font-weight:800}.study-plan-milestone-list article>strong{margin-top:5px;font-size:12px}.study-plan-milestone-list article p{margin:5px 0 0;color:var(--muted);font-size:11px;line-height:1.55}.study-plan-account-content>.question-actions{margin-bottom:0}
.study-plan-dialog{width:min(760px,calc(100% - 28px));max-width:none;max-height:min(92dvh,900px);padding:0;border:0;border-radius:19px;background:#fff;color:var(--ink);box-shadow:0 28px 90px rgba(7,25,44,.32);overflow:auto}.study-plan-dialog::backdrop{background:rgba(9,24,42,.5);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}.study-plan-dialog-head{position:sticky;top:0;z-index:2;display:flex;justify-content:space-between;align-items:flex-start;gap:15px;padding:22px 26px 13px;background:#fff;border-bottom:1px solid #edf0f3}.study-plan-dialog-head h2{margin:4px 0;font-size:22px;color:var(--navy)}.study-plan-dialog-head p{margin:4px 0 0;font-size:11px}.study-plan-close{flex:0 0 38px;width:38px;height:38px;border:0;border-radius:11px;background:#f1f4f7;color:#405064;font-size:25px;line-height:1}.study-plan-dialog-progress{height:4px;background:#edf2f6}.study-plan-dialog-progress span{display:block;width:0;height:100%;background:#377dbb;transition:width .22s ease}.study-plan-wizard-content{padding:22px 26px 26px}.study-plan-question h3{margin:0 0 7px;font-size:19px;color:var(--navy)}.study-plan-question>p{margin:0 0 19px;color:var(--muted);font-size:12px;line-height:1.6}.study-plan-choice{display:flex;align-items:flex-start;gap:11px;margin:9px 0;padding:13px;border:1px solid #dce4ec;border-radius:12px;cursor:pointer}.study-plan-choice:has(input:checked){border-color:#8fb0d0;background:#f5f9fd}.study-plan-choice input{margin-top:3px;accent-color:var(--blue)}.study-plan-choice span,.study-plan-choice strong,.study-plan-choice small{display:block}.study-plan-choice strong{font-size:12px}.study-plan-choice small{margin-top:4px;font-size:10px;color:var(--muted)}.study-plan-question .field{margin:16px 0}.study-plan-question .field>small{font-size:10px;color:var(--muted)}.study-plan-question input[type="date"],.study-plan-question input[type="number"],.study-plan-question input[type="text"],.study-plan-question select{width:100%;padding:11px 12px;border:1px solid #ccd6e1;border-radius:10px;background:#fff;color:var(--ink)}.study-plan-radio-row{display:grid;grid-template-columns:1fr 1fr;gap:10px}.study-plan-checkbox-grid{display:grid;grid-template-columns:1fr 1fr;gap:7px}.study-plan-check{display:flex;gap:9px;align-items:center;padding:11px;border:1px solid #dce4ec;border-radius:10px;font-size:12px;cursor:pointer}.study-plan-check:has(input:checked){border-color:#8fb0d0;background:#f5f9fd}.study-plan-check input{accent-color:var(--blue)}.study-plan-schedule-inputs{display:grid;grid-template-columns:1fr 1fr;gap:12px}.study-plan-weekday-picker{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:7px;margin-top:8px}.study-plan-weekday{min-height:42px;padding:6px;border:1px solid #ced8e2;border-radius:9px;background:#fff;color:#4c5969;font-size:11px;font-weight:750}.study-plan-weekday.active{background:var(--navy);border-color:var(--navy);color:#fff}.study-plan-hint{padding:11px 13px;border-radius:10px;background:#f2f6fa;color:var(--muted);font-size:11px;line-height:1.55}.study-plan-rank-list{display:grid;gap:7px;margin:14px 0;padding:0;list-style:none}.study-plan-rank-row{display:grid;grid-template-columns:30px minmax(0,1fr) auto;gap:10px;align-items:center;min-height:45px;padding:6px 9px;border:1px solid #dce4ec;border-radius:10px;background:#fff}.study-plan-rank-row[draggable="true"]{cursor:grab}.study-plan-rank-number{display:grid;place-items:center;width:26px;height:26px;border-radius:8px;background:#eaf2f9;color:var(--navy);font-size:11px;font-weight:850}.study-plan-rank-row strong{font-size:11px}.study-plan-rank-actions{display:flex;gap:5px}.study-plan-rank-actions button{width:28px;height:28px;border:1px solid #d7e0e9;border-radius:8px;background:#f8fafc;color:var(--navy)}.study-plan-rank-actions button:disabled{opacity:.35;cursor:default}.study-plan-ranking-labels{display:flex;justify-content:space-between;font-size:10px;color:var(--muted);font-weight:750}.study-plan-range-label{display:flex;justify-content:space-between;font-size:12px;font-weight:750;color:#4c5969}.study-plan-range{width:100%;margin:24px 0 9px;accent-color:var(--blue)}.study-plan-range-ends{display:flex;justify-content:space-between;color:var(--muted);font-size:10px}.study-plan-review-summary{display:grid;gap:8px}.study-plan-review-summary>div{display:grid;grid-template-columns:150px 1fr;gap:12px;padding:10px 12px;border-radius:9px;background:#f5f8fb}.study-plan-review-summary span{font-size:10px;color:var(--muted)}.study-plan-review-summary strong{font-size:11px;line-height:1.5}.study-plan-wizard-actions{display:flex;justify-content:space-between;gap:10px;margin-top:23px;padding-top:16px;border-top:1px solid #e9edf1}.study-plan-wizard-actions .primary-button,.study-plan-wizard-actions .secondary-button{width:auto;min-width:130px;justify-content:center;text-decoration:none}.study-plan-error{margin-top:12px;padding:10px 12px;border-radius:9px;background:#fff0f0;color:#a33333;font-size:11px;line-height:1.5}.study-plan-finished{text-align:center;padding:28px 12px 10px}.study-plan-finished h3{margin:14px 0 6px;font-size:22px;color:var(--navy)}.study-plan-finished>p{max-width:500px;margin:0 auto 12px;color:var(--muted);font-size:12px;line-height:1.65}.study-plan-success-mark,.study-plan-error-mark{display:grid;place-items:center;width:56px;height:56px;margin:auto;border-radius:50%;background:#e5f5ec;color:#24744d;font-size:27px;font-weight:850}.study-plan-error-mark{background:#fff3dd;color:#8a6215}.study-plan-loading-track{height:8px;overflow:hidden;border-radius:999px;background:#eaf0f5}.study-plan-loading-track span{display:block;width:55%;height:100%;border-radius:inherit;background:linear-gradient(90deg,#2468a9,#58a2d3);animation:study-plan-progress 1.8s ease-in-out infinite alternate}.study-plan-finished .study-plan-loading-track{max-width:420px;margin:19px auto 12px}.study-plan-loading-copy{font-size:11px!important}.study-plan-wizard-actions .secondary-button{display:flex;align-items:center;justify-content:center}
@keyframes study-plan-progress{from{transform:translateX(-80%)}to{transform:translateX(160%)}}
@media(max-width:760px){.home-study-plan-invite{grid-template-columns:1fr;gap:17px}.home-study-plan-invite .primary-button{width:100%}.home-plan-event{grid-template-columns:100px 1fr}.home-plan-event>.secondary-button{grid-column:2;justify-self:start}.study-plan-plan-stats{grid-template-columns:repeat(2,1fr)}.study-plan-complete-head{align-items:flex-start}.study-plan-weekly-item{align-items:flex-start;flex-direction:column}.study-plan-weekly-item .secondary-button{width:auto}.study-plan-dialog-head{padding:18px 18px 12px}.study-plan-wizard-content{padding:19px 18px 22px}}
@media(max-width:520px){.home-study-plan{padding:19px 15px}.home-study-plan-header{align-items:flex-start;flex-direction:column}.home-plan-calendar-head{align-items:flex-start;flex-direction:column}.home-plan-calendar-head .question-actions{width:100%;flex-wrap:wrap}.home-plan-calendar-head .text-button{margin-left:auto}.home-plan-calendar{gap:3px}.home-plan-calendar-blank,.home-plan-calendar-day{min-height:49px}.home-plan-calendar-day{border-radius:8px;font-size:11px}.home-plan-calendar-day.has-task::after{bottom:4px}.home-plan-calendar-day i{top:2px;right:3px;font-size:8px}.home-plan-assessment{grid-template-columns:1fr}.home-plan-event{grid-template-columns:1fr;gap:7px}.home-plan-event>.secondary-button{grid-column:auto}.study-plan-empty{grid-template-columns:1fr;padding:18px}.study-plan-empty-icon{width:45px;height:45px;font-size:24px}.study-plan-complete-head{flex-direction:column}.study-plan-countdown-account{width:100%}.study-plan-review-summary>div{grid-template-columns:1fr;gap:3px}.study-plan-schedule-inputs{grid-template-columns:1fr;gap:0}.study-plan-checkbox-grid{grid-template-columns:1fr}.study-plan-weekday-picker{gap:4px}.study-plan-weekday{font-size:9px;padding:4px 1px}.study-plan-wizard-actions .primary-button,.study-plan-wizard-actions .secondary-button{min-width:0;flex:1}.study-plan-rank-row{grid-template-columns:28px minmax(0,1fr) auto}.study-plan-dialog{max-height:94dvh;border-radius:15px}}
/* Study plan retakes and hands-on calendar controls */
.study-plan-customizer{margin:20px 0;padding:15px;border:1px solid #d9e3ec;border-radius:13px;background:#fbfdff}.study-plan-customizer>summary,.study-plan-home-customizer>summary{cursor:pointer;color:var(--navy);font-size:13px;font-weight:850}.study-plan-customizer>p{margin:8px 0 14px;color:var(--muted);font-size:11px;line-height:1.55}.study-plan-customizer-fields{display:grid;grid-template-columns:minmax(160px,.7fr) minmax(0,1.3fr);gap:14px;align-items:start}.study-plan-customizer .field{margin:0}.study-plan-days{display:flex;flex-wrap:wrap;gap:7px;margin:0;padding:10px;border:1px solid #dce4ec;border-radius:10px}.study-plan-days legend{padding:0 5px;color:var(--muted);font-size:10px;font-weight:750}.study-plan-days label{display:flex;align-items:center;gap:5px;padding:6px 8px;border-radius:8px;background:#f0f5f9;font-size:10px}.study-plan-days input{accent-color:var(--blue)}.study-plan-customizer-rows{display:grid;gap:8px;margin-top:14px}.study-plan-customizer-row{display:grid;grid-template-columns:90px 1fr 1fr;gap:10px;align-items:end;padding:10px;border:1px solid #e0e7ed;border-radius:10px;background:#fff}.study-plan-customizer-row>strong{padding-bottom:9px;color:var(--navy);font-size:11px}.study-plan-customizer-row label>span{display:block;margin-bottom:5px;color:var(--muted);font-size:9px}.study-plan-customizer-row select,.study-plan-customizer .field select{width:100%;min-height:40px;padding:8px;border:1px solid #d2dce6;border-radius:8px;background:#fff;color:var(--ink);font-size:11px}.study-plan-progress-line{grid-column:1/-1}.study-plan-home-customizer{grid-column:1/-1;padding-top:5px}.study-plan-home-customizer>a{display:inline-block;margin-top:8px;color:var(--blue);font-size:11px}.home-plan-task-check{grid-column:1/-1;display:flex;align-items:center;gap:6px;color:var(--muted);font-size:10px;font-weight:750}.home-plan-task-check input{accent-color:#268255}.home-plan-event.completed{background:#f2faf5;border-color:#c8e3d2}.home-plan-event.completed h4{text-decoration:line-through;color:#547162}
@media(max-width:620px){.study-plan-customizer-fields{grid-template-columns:1fr}.study-plan-customizer-row{grid-template-columns:1fr;gap:7px}.study-plan-customizer-row>strong{padding:0}.home-plan-event{grid-template-columns:1fr}}
.study-plan-resume-row{display:flex;justify-content:center;margin:12px 0 0;padding-top:8px}.study-plan-resume-row .text-button{width:auto!important;color:#526579;font-size:11px;text-decoration:underline;text-underline-offset:3px}.study-plan-wizard-footer{margin-bottom:0}
.study-plan-subtabs{display:flex;gap:7px;margin:20px 0 14px;padding:4px;width:max-content;border-radius:11px;background:#f1f5f8}.study-plan-subtabs button{border:0;border-radius:8px;padding:9px 17px;background:transparent;color:var(--muted);font-size:12px;font-weight:800;cursor:pointer}.study-plan-subtabs button.active{background:#fff;color:var(--navy);box-shadow:0 1px 4px #10253d18}.study-plan-calendar-content{padding-top:2px}.home-study-plan-highlight{display:grid;grid-template-columns:minmax(0,1fr);gap:12px}.home-study-plan-highlight>h2{margin:0;color:var(--navy);font-size:clamp(21px,3vw,28px)}.home-study-plan-highlight>.text-button{justify-self:start}.home-plan-highlight-event{max-width:900px;padding:18px 20px;border:1px solid #d5e2ee;border-radius:14px;background:linear-gradient(120deg,#f8fbfe,#eef5fa)}.home-plan-highlight-meta{display:flex;align-items:center;gap:12px;color:var(--blue);font-size:11px;font-weight:850}.home-plan-highlight-meta strong{color:var(--muted);font-size:10px}.home-plan-highlight-event h3{margin:7px 0;color:var(--navy);font-size:17px}.home-plan-highlight-event p{margin:0;color:var(--muted);font-size:12px;line-height:1.55}.home-plan-highlight-event>small{display:block;margin-top:8px;color:var(--muted);font-size:10px}.home-plan-highlight-actions{display:flex;align-items:center;gap:15px;margin-top:13px}.home-plan-highlight-actions .primary-button{width:auto}.home-plan-highlight-event.completed{background:#f2faf5;border-color:#c8e3d2}.home-plan-highlight-event.completed h3{text-decoration:line-through;color:#547162}
.study-plan-ranking-layout{display:grid;grid-template-columns:76px minmax(0,1fr);gap:12px;align-items:stretch;margin-top:14px}.study-plan-ranking-axis{display:flex;flex-direction:column;justify-content:space-between;align-items:flex-end;padding:8px 0;color:var(--muted);font-size:10px;font-weight:800}.study-plan-ranking-axis span:first-child{writing-mode:vertical-rl;transform:rotate(180deg)}.study-plan-ranking-axis span:last-child{writing-mode:vertical-rl}.study-plan-ranking-layout .study-plan-rank-list{margin:0}.study-plan-ranking-labels{display:none}
@media(max-width:520px){.study-plan-ranking-layout{grid-template-columns:54px minmax(0,1fr);gap:8px}.study-plan-ranking-axis{font-size:9px}}
/* Keep the vertical ranking scale tucked against the cards. */
.study-plan-ranking-layout{grid-template-columns:28px minmax(0,1fr);gap:8px}.study-plan-ranking-axis{align-items:center;padding:7px 0;font-size:9px;letter-spacing:.01em}
@media(max-width:520px){.study-plan-ranking-layout{grid-template-columns:24px minmax(0,1fr);gap:6px}.study-plan-ranking-axis{font-size:8px}}
.study-plan-loading-track span{width:35%;animation:study-plan-progress 1.45s linear infinite;transform-origin:left center}
@keyframes study-plan-progress{0%{transform:translateX(-100%)}100%{transform:translateX(300%)}}

.semantic-figure-scroll, :has(> svg.semantic-figure) { overflow-x: auto; }

/* Phase 9 recovery messages remain usable on narrow screens and by keyboard. */
.study-connection-status { position:sticky;top:0;z-index:1000;display:flex;gap:12px;align-items:center;justify-content:space-between;padding:12px 20px;background:#fff4d8;color:#102540;border-bottom:1px solid #d8b35a; }
.study-connection-status[hidden] { display:none; }
.study-connection-status button { min-height:44px;flex-shrink:0; }
:where(button,a,input,select,textarea):focus-visible { outline:3px solid #2975b9;outline-offset:3px; }
@media(max-width:600px){.study-connection-status{align-items:stretch;flex-direction:column;padding:12px;}.study-connection-status button{width:100%;}}

/* Learn mastery remains a compact topic-level panel; detailed gaps are disclosed. */
.learn-assessment-dialog {width:min(720px,calc(100vw - 32px));max-height:calc(100dvh - 40px);overflow:auto;border:1px solid #d7e2ee;border-radius:18px;padding:24px;color:#0c2340;box-sizing:border-box;}
.learn-assessment-dialog::backdrop {background:rgba(12,35,64,.4);backdrop-filter:blur(5px);}
.learn-assessment-dialog label {display:block;margin:12px 0;}
.learn-assessment-dialog input[type=text] {max-width:100%;box-sizing:border-box;}
#learnMasteryPanel .question-actions {flex-wrap:wrap;}
#learnCoverageAudit details {margin:12px 0;overflow-wrap:anywhere;}
@media (max-width:600px) {.learn-assessment-dialog {padding:16px;}#learnMasteryPanel .question-actions>* {max-width:100%;}}

.account-calculator-actions{display:flex;align-items:center;align-content:start;flex-wrap:wrap;gap:10px;padding-top:26px}
.account-calculator-actions small{flex-basis:100%}
@media(max-width:720px){.account-calculator-actions{padding-top:0}}

.training-groups{display:grid;gap:20px;margin:20px 0}.training-groups h3{margin:0 0 10px}.training-skill-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:10px}.training-skill-card{display:flex;flex-direction:column;gap:7px;text-align:left;padding:16px;border:1px solid #ccd6e1;border-radius:12px;background:#fff;color:var(--ink);cursor:pointer;font:inherit}.training-skill-card span,.training-skill-card small{color:var(--muted,#667386);font-size:.9rem}.training-skill-card[aria-pressed="true"]{border-color:var(--blue);box-shadow:0 0 0 2px var(--blue);background:#f2f7fc}.training-skill-card:focus-visible{outline:3px solid var(--blue);outline-offset:3px}

.training-givens{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px;margin:12px 0 22px}.training-givens>div{padding:12px 15px;border:1px solid var(--line);border-radius:10px;background:#f7faff}.training-givens dt{color:var(--muted);font-size:.85rem}.training-givens dd{margin:5px 0 0;font-weight:750}.training-equation{padding:14px;background:#f2f6fb;border-radius:10px;font-size:1.1rem;overflow-wrap:anywhere}.training-guide{margin:22px 0;padding:20px;border:1px solid var(--line);border-radius:12px}.training-guide details{margin:14px 0}.training-guide .field{margin:14px 0}.training-checklist{display:grid;gap:10px;margin:18px 0}.training-checklist input{width:auto;margin-right:8px}

.training-relationships .katex-display{text-align:left;margin:.65em 0;overflow-x:auto;overflow-y:hidden;padding:4px 0}.training-relationships .katex-display>.katex{text-align:left}

.sim-layout{display:grid;grid-template-columns:minmax(320px,510px) minmax(0,1fr);gap:24px;align-items:start}.sim-body{padding:26px;border-radius:32px;background:linear-gradient(145deg,#465564,#202d3b);box-shadow:0 12px 30px #0c234033;border:3px solid #172534;color:white}.sim-brand{display:flex;justify-content:space-between;font-weight:800;gap:16px;margin-bottom:22px}.sim-brand span{font-weight:500;font-size:.85rem}.sim-display{background:#dce5ca;border:5px solid #14202c;border-radius:12px;padding:16px;color:#1c2b20;margin-bottom:20px}.sim-display input{width:100%;background:#eff4e5;border:1px solid #88977d;color:#17291c;font-size:1.1rem;padding:12px;border-radius:5px}.sim-display output{display:block;min-height:48px;font-family:monospace;font-size:1.6rem;overflow-wrap:anywhere;margin-top:14px;max-height:220px;overflow:auto}.sim-mode{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px;font-size:.8rem}.sim-mode select,.sim-memory select{width:auto;padding:5px}.sim-keys{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:10px}.sim-keys button{min-height:48px;border-radius:9px;border:1px solid #687886;background:#f0f3f6;color:#172c43;font-size:1rem;font-weight:750;box-shadow:0 3px 0 #122231;cursor:pointer}.sim-keys button:hover{background:#dbeaff}.sim-keys button:active{transform:translateY(2px);box-shadow:none}.sim-keys button[data-key="enter"]{background:#2b73bd;color:white;font-size:.8rem}.sim-keys button[aria-pressed="true"]{background:#ffd66e}.sim-memory{display:grid;gap:10px;margin-top:20px}.sim-tool-form{display:grid;gap:14px;margin:16px 0}.sim-tool-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(100px,1fr));gap:10px}.sim-tool-form [hidden]{display:none}.sim-history{display:grid;gap:8px}.sim-history-item{text-align:left;padding:12px;border:1px solid var(--line);background:#f7faff;border-radius:9px;overflow-wrap:anywhere;color:var(--ink);cursor:pointer}.sim-layout details{margin:20px 0}.sim-layout summary{cursor:pointer;font-weight:750}.sim-layout button:focus-visible{outline:3px solid #438ada;outline-offset:3px}@media(max-width:900px){.sim-layout{grid-template-columns:1fr}.sim-body{max-width:510px;width:100%;margin:auto;box-sizing:border-box}}@media(max-width:420px){.sim-body{padding:14px}.sim-keys{gap:7px}.sim-keys button{font-size:.9rem}}

/* TI-36X Pro-inspired device skin; all controls remain native buttons. */
.sim-body{padding:28px 25px 32px;border-radius:28px 28px 48px 48px;background:linear-gradient(100deg,#15191d 0%,#34393e 9%,#282d32 50%,#353a3f 92%,#171b1f 100%);border:2px solid #101316;box-shadow:inset 0 0 0 3px #484d51,inset 0 0 18px #111,0 15px 24px #0c23403b}.sim-brand{align-items:center;margin:0 0 10px;color:#f3f4f5}.sim-brand strong{font-family:Arial,sans-serif;font-size:1.65rem;letter-spacing:-1px;font-weight:650}.sim-brand em{font-size:1.1rem;font-weight:500;letter-spacing:0}.sim-solar{display:flex;width:135px;height:31px;border:3px solid #11171c;border-radius:3px;background:#352d2c;box-shadow:inset 0 2px 6px #000}.sim-solar i{flex:1;border-right:1px solid #69534b;background:linear-gradient(#292425,#4a3932,#292425)}.sim-solar i:last-child{border:0}.sim-device-caption{font-size:.65rem;color:#c5c9cd;letter-spacing:.025em;margin-bottom:16px}.sim-display{background:linear-gradient(#c2cfb0,#d4dfc1);border:8px solid #11181d;border-radius:8px;padding:12px;box-shadow:0 0 0 2px #626a70,inset 0 2px 5px #7a886b;margin-bottom:10px;min-height:150px}.sim-display input{background:transparent;border:0;border-bottom:1px solid #9aa98a;border-radius:0;font-family:monospace;font-size:1.05rem;padding:9px 0;color:#17231b}.sim-display .field>span{font-size:.65rem;color:#536048}.sim-display output{text-align:right;font-size:1.6rem}.sim-mode select{background:transparent;border:0;padding:2px;color:#21301e;font-family:monospace}.sim-control-row{display:flex;align-items:center;justify-content:space-between;margin:12px 0 16px}.sim-multiview{font-size:.8rem;color:#c4cbd0;font-style:italic}.sim-direction-pad{display:grid;grid-template-columns:repeat(3,28px);grid-template-rows:repeat(3,24px);border-radius:50%;padding:7px;background:radial-gradient(#d5d9de,#919ba5);border:2px solid #11181e;box-shadow:0 3px 0 #15191d}.sim-direction-pad button{padding:0;border:0;background:transparent;color:#27333e;font-size:.75rem;cursor:pointer}.sim-direction-pad [data-sim-nav="up"]{grid-column:2;grid-row:1}.sim-direction-pad [data-sim-nav="left"]{grid-column:1;grid-row:2}.sim-direction-pad span{grid-column:2;grid-row:2;border-radius:50%;background:#b8c1ca}.sim-direction-pad [data-sim-nav="right"]{grid-column:3;grid-row:2}.sim-direction-pad [data-sim-nav="down"]{grid-column:2;grid-row:3}.sim-keys{gap:12px 9px}.sim-keys button{border-radius:7px 7px 10px 10px;min-height:45px;background:linear-gradient(#555b61,#333a41);border:1px solid #131a20;box-shadow:0 3px 0 #0b1014,inset 0 1px 0 #77818a;color:#f7f7f7;font-size:.9rem}.sim-keys button:hover{background:linear-gradient(#697681,#465563)}.sim-keys button[data-key="shift"]{background:#548cbe;color:#fff}.sim-keys button[data-key="enter"]{background:linear-gradient(#d9dde2,#9ba5af);color:#152c43}.sim-keys button[data-key="0"],.sim-keys button[data-key="1"],.sim-keys button[data-key="2"],.sim-keys button[data-key="3"],.sim-keys button[data-key="4"],.sim-keys button[data-key="5"],.sim-keys button[data-key="6"],.sim-keys button[data-key="7"],.sim-keys button[data-key="8"],.sim-keys button[data-key="9"],.sim-keys button[data-key="."]{background:linear-gradient(#f5f5f4,#d4d7da);color:#162f47;font-size:1.25rem}.sim-keys button[aria-pressed="true"]{background:#81b9e9;color:#102c42}.sim-memory{font-size:.8rem;color:#cbd2d8}@media(max-width:420px){.sim-body{padding:22px 16px 28px}.sim-brand strong{font-size:1.4rem}.sim-solar{width:100px;height:26px}.sim-keys{gap:10px 6px}}

.sim-photo{position:relative;aspect-ratio:46/94;padding:0;background:white;border:0;box-shadow:none;border-radius:0;overflow:visible;margin-bottom:105px}.sim-reference-face{position:absolute;width:217.4%;max-width:none;height:auto;left:-58.7%;top:-3.2%;pointer-events:none;clip-path:inset(3% 26.5% 2.5% 26.5%)}.sim-photo .sim-brand,.sim-photo .sim-device-caption,.sim-photo .sim-multiview{display:none}.sim-photo .sim-display{position:absolute;left:13%;top:21.5%;width:74%;height:14%;min-height:0;box-sizing:border-box;border:0;padding:8px 12px;background:linear-gradient(#d3dec9,#bdccb3);box-shadow:inset 0 1px 3px #758b71;border-radius:10px;margin:0;overflow:auto}.sim-photo .sim-display .field>span{position:absolute;width:1px;height:1px;clip-path:inset(50%);overflow:hidden}.sim-photo .sim-display .field{margin:0}.sim-photo .sim-display input{font-size:clamp(.75rem,2vw,1.15rem);padding:4px 0}.sim-photo .sim-mode{margin:0;font-size:.65rem}.sim-photo .sim-display output{font-size:clamp(1rem,2.8vw,1.65rem);min-height:20px;margin:3px 0}.sim-photo .sim-keys{position:absolute;inset:0;display:block}.sim-photo .sim-keys button{position:absolute;transform:translate(-50%,-50%);width:12%;height:4.4%;min-height:0;border:0;background:transparent!important;box-shadow:none;color:transparent!important;border-radius:40%;font-size:0!important;z-index:2}.sim-photo .sim-keys button:hover{background:#3d9bdf30!important}.sim-photo .sim-keys button:active{transform:translate(-50%,-50%);background:#3d9bdf60!important}.sim-photo .sim-keys button[aria-pressed="true"]{outline:2px solid #7dbfe8}.sim-photo .sim-control-row{position:absolute;left:65%;top:40%;width:22%;height:10%;margin:0;z-index:3}.sim-photo .sim-direction-pad{width:100%;height:100%;padding:0;border:0;background:transparent;box-shadow:none;grid-template-columns:repeat(3,1fr);grid-template-rows:repeat(3,1fr)}.sim-photo .sim-direction-pad span{background:transparent}.sim-photo .sim-direction-pad button{color:transparent;background:transparent}.sim-photo .sim-direction-pad button:hover{background:#3d9bdf40;border-radius:50%}.sim-photo .sim-memory{position:absolute;top:101%;left:0;right:0;color:var(--ink);padding:10px;background:#f4f7fa;border-radius:10px;box-sizing:border-box;margin:0}.sim-photo .sim-display input:focus{outline:2px solid #447343}@media(max-width:420px){.sim-photo{padding:0}.sim-photo .sim-display{padding:4px 7px}.sim-photo .sim-mode{font-size:.55rem}.sim-photo .sim-display input{padding:2px 0}}
.sim-photo{background:white url('ti36x-reference.png') center center/217.4% auto no-repeat}.sim-photo .sim-reference-face{display:none}.sim-photo .sim-keys{pointer-events:none}.sim-photo .sim-keys button{pointer-events:auto}
/* Directional targets follow the photographed arrow positions. */
.sim-photo .sim-control-row{left:63.3%;top:40%;width:24.5%;height:9.2%}
.sim-photo .sim-direction-pad{position:relative;display:block}
.sim-photo .sim-direction-pad span{display:none}
.sim-photo .sim-direction-pad button{position:absolute;width:32%;height:32%;padding:0;border:0;border-radius:50%;transform:translate(-50%,-50%)}
.sim-photo .sim-direction-pad [data-sim-nav="up"]{left:50%;top:21%}
.sim-photo .sim-direction-pad [data-sim-nav="left"]{left:20%;top:50%}
.sim-photo .sim-direction-pad [data-sim-nav="right"]{left:80%;top:50%}
.sim-photo .sim-direction-pad [data-sim-nav="down"]{left:50%;top:79%}
.sim-photo .sim-direction-pad button:hover{background:#3d9bdf30}
.sim-photo .sim-direction-pad button:focus-visible{outline:2px solid #69b9ee;outline-offset:1px}
.sim-photo .sim-control-row{top:39.3%;height:9.5%}

.formula-topic-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:20px 0}.formula-topic{display:flex;flex-direction:column;gap:7px;text-align:left;padding:15px;border:1px solid var(--line);border-radius:12px;background:#fff;color:var(--ink);font:inherit;cursor:pointer}.formula-topic span,.formula-topic small{color:var(--muted);font-size:.85rem}.formula-topic[aria-pressed="true"]{background:#edf5fc;border-color:var(--blue);box-shadow:0 0 0 1px var(--blue)}.formula-lesson{border-top:1px solid var(--line);padding-top:24px}.formula-lesson h3{font-size:1.3rem}.formula-methods{display:flex;gap:10px;flex-wrap:wrap;margin:20px 0}.formula-methods button{padding:12px 16px;border:1px solid var(--line);border-radius:10px;background:white;color:var(--ink);font:inherit;cursor:pointer}.formula-methods button[aria-pressed="true"]{background:var(--blue);color:white}.formula-walkthrough{padding:20px;border:1px solid var(--line);border-radius:12px;background:#f7faff}.formula-walkthrough h4{font-size:1.15rem;margin:12px 0}.formula-entry{display:grid;gap:8px;padding:14px;background:white;border-radius:10px;border:1px solid var(--line)}.formula-entry code{white-space:normal;overflow-wrap:anywhere;font-size:1rem}.formula-lesson details{margin:18px 0}.formula-lesson summary{font-weight:750;cursor:pointer}.formula-lesson button:focus-visible,.formula-topic:focus-visible{outline:3px solid #438ada;outline-offset:3px}@media(max-width:620px){.formula-topic-grid{grid-template-columns:1fr}}

.formula-emulator-dialog{width:min(1180px,calc(100% - 24px));max-width:none;height:min(92dvh,1050px);max-height:92dvh;padding:0;border:0;border-radius:16px;background:#fff;color:var(--ink);box-shadow:0 20px 70px #0c23404d;overflow:hidden}.formula-emulator-dialog::backdrop{background:#0c234077;backdrop-filter:blur(6px)}.formula-emulator-header{display:flex;align-items:start;justify-content:space-between;gap:16px;padding:16px 20px;border-bottom:1px solid var(--line);height:96px;box-sizing:border-box}.formula-emulator-header h2{font-size:1.2rem;margin:0 0 6px}.formula-emulator-header p{font-size:.85rem;margin:0;color:var(--muted)}.formula-emulator-frame{display:block;width:100%;height:calc(100% - 96px);border:0;background:white}.calculator-practice-page .learn-page{width:calc(100% - 24px);margin:12px auto 35px;gap:14px}.calculator-practice-page .sim-layout{grid-template-columns:minmax(260px,380px) minmax(0,1fr);gap:16px}.calculator-practice-page .sim-body{max-width:380px}.calculator-practice-page .dashboard-card{padding:18px}.calculator-practice-page .sim-keys button{font-size:.75rem;left:auto!important;top:auto!important}.calculator-practice-page .sim-photo .sim-keys button{left:var(--key-x)!important;top:var(--key-y)!important}.calculator-practice-page[data-calculator-model^="casio"] .sim-body:not(.sim-photo){background:linear-gradient(#e5e7e9,#c4cbd3);color:#1b2d42;border-color:#718091}.calculator-practice-page[data-calculator-model^="casio"] .sim-memory{color:#1b2d42}.calculator-practice-page[data-calculator-model^="hp"] .sim-body:not(.sim-photo){background:linear-gradient(#363b42,#14191f)}.calculator-practice-page[data-calculator-model="ti-30xs"] .sim-body:not(.sim-photo){border-color:#50747b;background:linear-gradient(#73969b,#203e46)}@media(max-width:720px){.calculator-practice-page .sim-layout{grid-template-columns:1fr}.formula-emulator-header{padding:12px;height:110px}.formula-emulator-frame{height:calc(100% - 110px)}}

#simLesson details code{display:block;padding:12px;background:#f3f7fb;white-space:normal;overflow-wrap:anywhere}#simLesson:empty{display:none}
/* Each practice model uses its own complete, unmodified photograph. */
.calculator-practice-page .sim-model-photo{background-size:100% auto;background-position:center top;margin-bottom:205px}
.calculator-practice-page .sim-model-photo .sim-keys button{width:var(--face-key-width);height:var(--face-key-height)}
.calculator-practice-page .sim-model-photo .sim-memory{color:var(--ink);grid-template-columns:1fr 1fr;gap:8px}
.calculator-practice-page .sim-model-photo .sim-memory label,.calculator-practice-page .sim-model-photo .sim-memory small{grid-column:1/-1}
.calculator-practice-page .sim-model-photo .sim-control-row[hidden]{display:none}
/* Optional calculator is a nonmodal side panel: the lesson remains interactive. */
.formula-emulator-dialog{position:fixed;inset:12px 12px 12px auto;margin:0;width:420px;height:calc(100dvh - 24px);max-height:none;max-width:calc(100vw - 24px);border:1px solid var(--line);border-radius:16px;box-shadow:0 8px 32px #0c234033;z-index:1000}
.formula-emulator-header{height:120px;padding:14px;gap:10px}
.formula-emulator-header h2{font-size:1rem}
.formula-emulator-header p{font-size:.8rem}
.formula-emulator-frame{height:calc(100% - 120px)}
@media(min-width:1000px){body.calculator-panel-open .app-shell{width:calc(100% - 448px);margin-left:0;margin-right:448px}body.calculator-panel-open .learn-page{width:calc(100% - 32px)}}
@media(max-width:999px){.formula-emulator-dialog{inset:auto 8px 8px auto;width:360px;height:48dvh;max-width:calc(100vw - 16px)}body.calculator-panel-open{padding-bottom:50dvh}.formula-emulator-header{height:100px;padding:10px}.formula-emulator-frame{height:calc(100% - 100px)}}
.calculator-practice-page .sim-layout{grid-template-columns:1fr}
.calculator-practice-page .sim-body{width:100%;margin-left:auto;margin-right:auto}
.calculator-practice-page .learn-page>.dashboard-card:first-child:not(.calculator-preview){display:none}
.calculator-practice-page #simLesson{padding:12px}
/* Panel expansion and device-only zoom retain the current calculator session. */
.formula-emulator-dialog{display:flex;flex-direction:column;overflow:visible}
.formula-emulator-dialog:not([open]){display:none}
.formula-emulator-header{height:auto;min-height:96px;flex-shrink:0;padding-left:46px}
.formula-emulator-frame{flex:1;height:0;min-height:0;border-radius:0 0 16px 16px}
.calculator-panel-expand{position:absolute;left:0;top:14px;width:38px;min-height:68px;padding:5px 2px;border:1px solid var(--line);border-left:0;border-radius:0 9px 9px 0;background:#e8f2fc;color:var(--ink);cursor:pointer;z-index:2}
.calculator-panel-expand>span:first-child{display:block;font-size:1.5rem}
.calculator-expand-label{display:block;font-size:.58rem;line-height:1.2}
.calculator-zoom-controls{display:flex;align-items:center;justify-content:center;gap:7px;padding:8px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);flex-shrink:0;font-size:.75rem}
.calculator-zoom-controls button{padding:5px 10px;min-height:32px;font-size:.8rem}
.calculator-zoom-controls output{min-width:38px;text-align:center;font-variant-numeric:tabular-nums}
.formula-emulator-dialog.calculator-panel-fullscreen{inset:0;width:100vw;max-width:100vw;height:100dvh;max-height:100dvh;border-radius:0;box-sizing:border-box}
.calculator-practice-page .sim-layout{overflow:auto;padding:4px 4px 16px}
/* The expanded workspace keeps a fitted calculator left of the word problem. */
@media(min-width:800px){.calculator-practice-page.calculator-expanded-workspace .sim-layout{grid-template-columns:minmax(240px,38%) minmax(0,1fr);gap:24px;align-items:start}.calculator-practice-page.calculator-expanded-workspace .sim-layout>.dashboard-card{max-height:calc(100dvh - 32px);overflow:auto}.calculator-expanded-workspace .sim-body{margin-left:0;margin-right:0}}
.calculator-expanded-workspace #simLesson{border:0;box-shadow:none;padding:0 0 16px}
/* Center the fitted calculator within its workspace column. */
.calculator-practice-page.calculator-expanded-workspace .sim-layout>.sim-body{justify-self:center;margin-left:auto;margin-right:auto}
/* Model selection is available inside both calculator panel sizes. */
.calculator-panel-model{display:flex;align-items:center;gap:10px;padding:8px 14px;border-top:1px solid var(--line);font-size:.8rem;font-weight:650;flex-shrink:0}
.calculator-panel-model select{flex:1;min-width:0;max-width:420px;padding:7px 10px;font-size:.85rem}
.calculator-panel-fullscreen .calculator-panel-model{justify-content:center}
/* Both learning flows share the section and problem-type selection. */
.calculator-lesson-selectors{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:16px 0}
.calculator-lesson-selectors .field{min-width:0;margin:0;font-size:.8rem}
.calculator-lesson-selectors select{width:100%;min-width:0;font-size:.82rem;padding:7px}
.calculator-panel-navigation{flex-shrink:0;margin:0;padding:8px 14px;border-top:1px solid var(--line)}
.calculator-panel-navigation>.question-actions{grid-column:1/-1;display:flex;gap:6px;margin:0;flex-wrap:wrap}
.calculator-panel-navigation button{font-size:.72rem;padding:5px 8px;min-height:30px}
.calculator-panel-navigation>.field:last-child{grid-column:1/-1}
@media(min-width:1000px){.calculator-panel-fullscreen .calculator-panel-navigation{grid-template-columns:minmax(160px,1fr) minmax(220px,2fr) minmax(280px,1fr) minmax(190px,1fr);align-items:center}.calculator-panel-fullscreen .calculator-panel-navigation>.question-actions,.calculator-panel-fullscreen .calculator-panel-navigation>.field:last-child{grid-column:auto}}
@media(max-width:999px){.formula-emulator-dialog:not(.calculator-panel-fullscreen){height:70dvh}body.calculator-panel-open{padding-bottom:72dvh}}
/* One toolbar groups the independent calculator and lesson dropdowns. */
.calculator-selection-toolbar{display:grid;grid-template-columns:minmax(0,1fr);gap:10px;flex-shrink:0;padding:12px 14px;border-top:1px solid var(--line);background:#f8fbff}
.calculator-selection-toolbar .calculator-panel-model{display:flex;flex-direction:column;align-items:stretch;gap:4px;padding:0;border:0;font-size:.8rem;font-weight:400}
.calculator-selection-toolbar .calculator-panel-model select{width:100%;max-width:none;flex:none}
.calculator-selection-toolbar .calculator-panel-navigation{display:contents}
.calculator-selection-toolbar .question-actions{grid-column:1/-1;display:flex;justify-content:flex-end;flex-wrap:wrap;gap:7px}
.calculator-selection-toolbar .question-actions button{min-height:30px}
@media(min-width:1000px){.calculator-panel-fullscreen .calculator-selection-toolbar{grid-template-columns:minmax(170px,1fr) minmax(190px,1fr) minmax(260px,2fr) minmax(180px,1fr);align-items:end}.calculator-panel-fullscreen .calculator-selection-toolbar .calculator-panel-navigation>.field:last-child{grid-column:4;grid-row:1}.calculator-panel-fullscreen .calculator-selection-toolbar .question-actions{grid-column:1/-1;grid-row:2}}
@media(max-width:999px){.calculator-selection-toolbar{grid-template-columns:1fr 1fr;padding:8px 10px;gap:7px}.calculator-selection-toolbar .calculator-panel-navigation>.field:last-child{grid-column:auto}.calculator-selection-toolbar .question-actions{grid-row:3}}
/* Mobile controls collapse without closing or resetting calculator practice. */
.calculator-controls-toggle{display:none}
@media(max-width:999px){.calculator-controls-toggle{display:block;flex-shrink:0;width:100%;padding:8px 12px;min-height:36px;border:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:#eef5fc;color:var(--ink);font-size:.8rem;font-weight:650;cursor:pointer}.calculator-controls-collapsed .calculator-selection-toolbar,.calculator-controls-collapsed .calculator-zoom-controls{display:none}.calculator-controls-collapsed .formula-emulator-header{min-height:64px;padding-top:8px;padding-bottom:8px}.calculator-controls-collapsed .formula-emulator-header p{display:none}.calculator-controls-collapsed .calculator-panel-expand{top:6px;min-height:50px}}
/* Hide the release badge until the server-confirmed account is an admin. */
.version-pill:not([data-admin-visible="true"]){display:none!important}
.learn-study-check-card{margin-top:20px;padding:18px;border:1px solid var(--line);border-radius:12px;background:#f7fbff}
.learn-study-check-card details{margin-top:12px}
/* Original lessons precede the separately grouped mastery and study-check controls. */
.learn-mastery-section{margin-top:24px;padding:24px;border:1px solid var(--line);border-radius:16px;background:#f5f9fd;color:var(--ink)}
.learn-mastery-heading{display:flex;justify-content:space-between;align-items:flex-start;gap:24px;margin-bottom:18px}
.learn-mastery-heading h3{margin:6px 0 0}
.learn-mastery-heading .field{width:min(100%,290px);margin:0}
.learn-mastery-section p{margin:12px 0;line-height:1.6}
.learn-mastery-section>.question-actions{margin:20px 0;gap:10px;flex-wrap:wrap}
.learn-mastery-section details{margin:14px 0;padding:12px 0}
.learn-mastery-section summary{cursor:pointer;font-size:.95rem;font-weight:650;line-height:1.5}
.learn-mastery-section li{margin:8px 0;line-height:1.5}
.learn-mastery-section .learn-study-check-card{margin-top:22px;background:white;padding:20px}
.learn-study-check-card h3{margin:0 0 10px}
.learn-study-check-card>[data-start]{width:auto;margin-top:6px}
@media(max-width:640px){.learn-mastery-section{padding:16px}.learn-mastery-heading{flex-direction:column;gap:14px}.learn-mastery-heading .field{width:100%}.learn-mastery-section>.question-actions{flex-direction:column;align-items:stretch}.learn-study-check-card>[data-start]{width:100%}}
.learn-study-check-card>button[hidden]{display:none!important}

.practice-choices{margin:24px 0;padding:28px}.practice-choice-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:24px}.formula-layout{max-width:1000px;margin:24px auto;display:grid;gap:20px}.formula-controls{display:flex;gap:20px;flex-wrap:wrap}.formula-controls .field{flex:1;min-width:220px}.formula-equation{overflow-x:auto;padding:30px 12px;background:#f3f7fc;border-radius:14px;text-align:center}.formula-options{display:grid;gap:12px;margin:20px 0}.formula-options label{display:flex;gap:12px;padding:16px;border:1px solid #ccd9e7;border-radius:12px}.formula-options input{width:auto}.formula-feedback{padding:18px;background:#edf5fc;border-radius:12px}.formula-layout .card{padding:24px}@media(max-width:650px){.practice-choice-grid{grid-template-columns:1fr}}

/* Practice entry: spacious, vertically stacked study choices. */
.practice-choices{max-width:960px;margin:32px auto;padding:36px;background:linear-gradient(145deg,#fff 65%,#f2f7fd)}
.practice-choice-heading{max-width:650px}.practice-choice-heading h2{font-size:clamp(1.7rem,3vw,2.2rem);margin:10px 0 12px}.practice-choice-heading p{color:#65758a;line-height:1.6;margin:0}
.practice-choice-grid{grid-template-columns:1fr;gap:18px;margin-top:30px}
.practice-choice-card{display:flex;align-items:center;gap:24px;min-height:154px;padding:26px 28px;border:1px solid #d4dfec;border-radius:18px;background:#fff;color:#102746;text-decoration:none;box-shadow:0 3px 12px rgba(16,39,70,.035);transition:border-color .18s,box-shadow .18s,transform .18s}
.practice-choice-card:hover{border-color:#2566ac;box-shadow:0 8px 22px rgba(25,71,122,.10);transform:translateY(-2px)}.practice-choice-card:focus-visible{outline:3px solid #2365b3;outline-offset:4px}
.practice-choice-icon{width:72px;height:72px;border-radius:18px;background:#eaf2fc;color:#2264aa;display:flex;align-items:center;justify-content:center;flex-shrink:0}.practice-choice-icon svg{width:34px;height:34px}.practice-choice-formula{font-family:Georgia,serif;font-size:28px;font-style:italic}
.practice-choice-copy{display:grid;gap:9px;flex:1}.practice-choice-copy strong{font-size:1.3rem;font-weight:750}.practice-choice-copy>span{color:#65758a;font-size:.98rem;font-weight:400;line-height:1.6;max-width:660px}.practice-choice-copy small{font-size:.8rem;font-weight:650;color:#2863a0;margin-top:3px}
.practice-choice-arrow{font-size:26px;color:#2863a0;flex-shrink:0}
@media(max-width:650px){.practice-choices{padding:24px 18px;margin:20px auto}.practice-choice-card{padding:22px 18px;gap:16px;align-items:flex-start}.practice-choice-icon{width:48px;height:48px;border-radius:13px}.practice-choice-icon svg{width:26px;height:26px}.practice-choice-formula{font-size:21px}.practice-choice-copy strong{font-size:1.15rem}.practice-choice-copy>span{font-size:.92rem}.practice-choice-arrow{font-size:22px;margin-top:10px}}
@media(prefers-reduced-motion:reduce){.practice-choice-card{transition:none}.practice-choice-card:hover{transform:none}}

.practice-back-link{grid-column:1/-1;justify-self:start;display:inline-flex;align-items:center;gap:9px;padding:10px 14px;border:1px solid var(--line);border-radius:10px;background:var(--surface);color:var(--navy);font-size:.9rem;font-weight:650;line-height:1.3;text-decoration:none}.practice-back-link svg{width:18px;height:18px;flex-shrink:0}.practice-back-link:hover{background:var(--blue-light);border-color:#aec9e7}.practice-back-link:focus-visible{outline:3px solid var(--blue);outline-offset:3px}
/* Shared owned PDF workspace. Search survives resizing and full-screen changes. */
.owned-pdf-viewer{height:100%;min-height:400px;display:flex;flex-direction:column;background:#e5eaf0;color:#17283d;overflow:hidden}
.owned-pdf-toolbar{display:flex;align-items:center;gap:8px;flex-wrap:wrap;padding:8px 12px;background:#fff;border-bottom:1px solid #ccd7e4;flex:none;font-size:14px}
.owned-pdf-toolbar button{border:1px solid #c7d5e6;border-radius:8px;padding:6px 12px;background:#f7faff;color:#102743;font:inherit;cursor:pointer}
.owned-pdf-toolbar input{width:65px;padding:5px;border:1px solid #ccd7e4;border-radius:6px;font:inherit}
.owned-pdf-scroll{flex:1;min-height:0;overflow:auto;padding:16px;overscroll-behavior:contain}
.owned-pdf-paper{position:relative;margin:0 auto;background:white;box-shadow:0 2px 12px #14283d22;isolation:isolate}
.owned-pdf-paper canvas{display:block}.owned-pdf-message{padding:24px;text-align:center}
.textLayer{position:absolute;inset:0;overflow:hidden;line-height:1;text-align:initial;transform-origin:0 0;z-index:2;caret-color:CanvasText}
.textLayer :is(span,br){color:transparent;position:absolute;white-space:pre;cursor:text;transform-origin:0 0}
.textLayer{--min-font-size:1;--text-scale-factor:calc(var(--scale-factor)*var(--min-font-size));--min-font-size-inv:1}
.textLayer> :not(.markedContent),.textLayer .markedContent span:not(.markedContent){z-index:1;--font-height:0;--scale-x:1;--rotation:0;font-size:calc(var(--text-scale-factor)*var(--font-height));transform:rotate(var(--rotation)) scaleX(var(--scale-x)) scale(var(--min-font-size-inv))}
.textLayer .markedContent{display:contents}.textLayer ::selection{background:#ffcc0066}
.reference-window-actions{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.library-workspace-v111{grid-template-columns:minmax(260px,320px) minmax(0,1fr)}
.library-viewer-v111{min-width:0;display:flex;flex-direction:column;padding:12px}
.library-viewer-v111 .library-pdf-wrap{height:calc(100dvh - 265px);min-height:500px;flex:1}
.library-viewer-head{flex-wrap:wrap;gap:8px}.library-viewer-head h2{font-size:20px}
.library-workspace-v111.search-collapsed{grid-template-columns:1fr}.library-workspace-v111.search-collapsed .library-control-panel{display:none}
.manual-window-expanded,.library-workspace-v111:fullscreen{position:fixed;inset:0;z-index:10000;background:#eef3f8;padding:12px;margin:0;max-width:none;height:100dvh;overflow:hidden;display:grid}
.manual-window-expanded .library-control-panel,.library-workspace-v111:fullscreen .library-control-panel{position:static;max-height:100%;overflow:auto}
.manual-window-expanded .library-viewer-v111,.library-workspace-v111:fullscreen .library-viewer-v111{min-height:0;height:100%;margin:0}
.manual-window-expanded .library-pdf-wrap,.library-workspace-v111:fullscreen .library-pdf-wrap{height:auto;min-height:0}
.exam-environment .reference-viewer-shell .pdf-viewer-frame-wrap{min-height:0;flex:1}.exam-environment #manualViewer{height:100%;min-height:430px}
.exam-environment .exam-mode-grid.reference-focus #referencePanel,#referencePanel:fullscreen{position:fixed!important;inset:0!important;width:100vw!important;height:100dvh!important;max-height:none!important;z-index:10000;background:#f5f8fc;padding:12px!important;display:flex!important;flex-direction:column;overflow:hidden}
.exam-environment .reference-search-drawer{overflow:auto;max-height:35vh}.exam-environment .reference-search-drawer .manual-results{max-height:23vh}
#referencePanel:fullscreen #manualViewer,.reference-focus #manualViewer{min-height:0!important}
#referencePanel:fullscreen .pdf-viewer-frame-wrap,.reference-focus .pdf-viewer-frame-wrap{min-height:0!important;height:auto!important}
#referencePanel:fullscreen .reference-search-drawer,.reference-focus .reference-search-drawer{position:absolute;top:145px;left:12px;width:min(360px,85vw);max-height:calc(100dvh - 185px);z-index:10;border:1px solid #c7d5e6;border-radius:12px;box-shadow:0 8px 32px #10274333}
#referencePanel:fullscreen .reference-search-drawer .manual-results,.reference-focus .reference-search-drawer .manual-results{max-height:calc(100dvh - 290px)}
@media(max-width:760px){.library-workspace-v111{grid-template-columns:1fr}.library-control-panel{max-height:45dvh;overflow:auto}.manual-window-expanded,.library-workspace-v111:fullscreen{grid-template-rows:auto minmax(0,1fr);gap:8px}.manual-window-expanded.search-collapsed,.library-workspace-v111:fullscreen.search-collapsed{grid-template-rows:1fr}.owned-pdf-toolbar{gap:5px;font-size:12px;padding:6px}.owned-pdf-toolbar button{padding:6px 8px}.owned-pdf-scroll{padding:8px}}
.calculator-study-page{max-width:1600px;padding:24px;margin:auto}.calculator-study-controls{margin:16px 0}.calculator-study-controls .formula-controls{grid-template-columns:repeat(4,minmax(0,1fr))}.calculator-study-grid{display:grid;grid-template-columns:minmax(320px,.8fr) minmax(0,1.7fr);gap:24px;align-items:start}.calculator-study-device{position:sticky;top:12px;padding:10px;height:calc(100dvh - 24px);overflow:hidden}.calculator-study-device iframe{border:0;width:100%;height:calc(100% - 54px)}.calculator-study-zoom{display:flex;gap:10px;align-items:center;justify-content:center;margin-bottom:8px}.calculator-study-zoom button{padding:6px 14px}#calcStudyLesson code{display:block;background:#f2f6fa;padding:14px;overflow-wrap:anywhere;margin:12px 0}#calcStudyLesson h3{margin-top:24px}.calculator-docked .learn-page>.dashboard-card,.calculator-docked #calculatorLessonHints,.calculator-docked .sim-layout>.dashboard-card{display:none!important}.calculator-docked .learn-page{padding:8px!important;margin:0!important;max-width:none!important}.calculator-docked .sim-layout{display:flex!important;justify-content:center!important;margin:0!important}.calculator-docked .sim-body{flex:none!important}.calculator-docked{background:#f5f8fc!important}
@media(max-width:900px){.calculator-study-controls .formula-controls{grid-template-columns:1fr 1fr}.calculator-study-grid{grid-template-columns:minmax(260px,.9fr) minmax(0,1.4fr);gap:12px}.calculator-study-page{padding:12px}.calculator-study-grid .card{padding:14px}}
@media(max-width:600px){.calculator-study-grid{grid-template-columns:1fr}.calculator-study-device{position:relative;top:0;height:70dvh}.calculator-study-controls .formula-controls{grid-template-columns:1fr}.calculator-study-zoom{flex-wrap:wrap}}
.formula-options [data-equation]{min-width:0;overflow-x:auto;padding:8px;width:100%}.formula-options [data-equation] .katex-display{margin:.4em 0}.formula-options label{align-items:center}.formula-options label input{flex:none}.formula-equation[hidden]{display:none}
.textLayer .pdf-search-hit{background:#ffdb5966;border-radius:2px}.textLayer span.markedContent{top:0;height:0}.textLayer{-webkit-text-size-adjust:none;text-size-adjust:none;forced-color-adjust:none}
.reference-library-head .exam-tool-button,.library-viewer-head .exam-tool-button{color:#102743;background:#fff;border:1px solid #c7d5e6}
.reference-library-head{gap:8px;flex-wrap:wrap}.reference-library-head>div:first-child{flex:1}
.exam-environment .exam-mode-grid.reference-focus #referencePanel,#referencePanel:fullscreen{display:grid!important;grid-template-columns:minmax(0,1fr);grid-template-rows:auto auto auto auto minmax(0,1fr)}
.exam-environment .exam-mode-grid.reference-focus #referencePanel.search-open,#referencePanel:fullscreen.search-open{grid-template-columns:320px minmax(0,1fr)}
.reference-focus #referencePanel .reference-library-head,#referencePanel:fullscreen .reference-library-head{grid-column:1/-1;grid-row:1;padding:8px;font-size:16px}
.reference-focus #referencePanel .reference-library-head h3,#referencePanel:fullscreen .reference-library-head h3{font-size:18px}
.reference-focus #referencePanel .reference-tabs,#referencePanel:fullscreen .reference-tabs{grid-column:1/-1;grid-row:2}
.reference-focus #referencePanel .reference-tab,#referencePanel:fullscreen .reference-tab{font-size:13px;padding:10px}
.reference-focus #referencePanel .reference-quickbar,#referencePanel:fullscreen .reference-quickbar{grid-column:1/-1;grid-row:3;padding:8px}
.reference-focus #referencePanel .reference-status-line,#referencePanel:fullscreen .reference-status-line{grid-column:1/-1;grid-row:4;font-size:12px}
.reference-focus #referencePanel .reference-quickbar select,#referencePanel:fullscreen .reference-quickbar select{font-size:14px;padding:8px;height:auto}
.reference-focus #referencePanel .reference-quickbar button,#referencePanel:fullscreen .reference-quickbar button{font-size:14px;padding:8px;height:auto}
.reference-focus #referencePanel .reference-page-control,#referencePanel:fullscreen .reference-page-control{font-size:13px}
.reference-focus #referencePanel .reference-page-control input,#referencePanel:fullscreen .reference-page-control input{font-size:14px;height:auto;padding:8px;width:70px}
.reference-focus #referencePanel .pdf-viewer-frame-wrap,#referencePanel:fullscreen .pdf-viewer-frame-wrap{grid-column:-2/-1;grid-row:5;min-width:0;min-height:0}
.reference-focus #referencePanel .reference-search-drawer,#referencePanel:fullscreen .reference-search-drawer{position:static;grid-column:1;grid-row:5;width:auto;height:100%;max-height:none;border:1px solid #ccd7e4;border-radius:8px;box-shadow:none;overflow:auto}
.reference-focus #referencePanel .reference-search-drawer .manual-results,#referencePanel:fullscreen .reference-search-drawer .manual-results{max-height:none}
.reference-focus #referencePanel .reference-search-drawer .reference-search-row input,#referencePanel:fullscreen .reference-search-drawer .reference-search-row input{font-size:14px;padding:9px;height:auto}
.reference-focus #referencePanel .reference-search-drawer .manual-result :is(strong,span,small),#referencePanel:fullscreen .reference-search-drawer .manual-result :is(strong,span,small){font-size:12px}
@media(max-width:760px){.exam-environment .exam-mode-grid.reference-focus #referencePanel.search-open,#referencePanel:fullscreen.search-open{grid-template-columns:minmax(0,1fr)}.reference-focus #referencePanel .reference-search-drawer,#referencePanel:fullscreen .reference-search-drawer{position:absolute;top:175px;left:12px;width:min(350px,calc(100vw - 24px));height:auto;max-height:45dvh;z-index:10;background:#edf3f8;box-shadow:0 8px 24px #10274333}.reference-focus #referencePanel .reference-quickbar,#referencePanel:fullscreen .reference-quickbar{display:flex;flex-wrap:wrap}.reference-focus #referencePanel .reference-quickbar select,#referencePanel:fullscreen .reference-quickbar select{max-width:42vw}}
.formula-choice-letter{flex:none;border-radius:6px;background:#e8eff7;padding:4px 8px;color:#102743}.formula-options label{gap:12px}
/* Calculator quiz workspace: bounded content and generous card spacing. */
.calculator-study-page{min-width:0}.calculator-study-controls{padding:clamp(20px,3vw,36px);border:1px solid #dbe5ef;background:linear-gradient(135deg,#fff,#f5f9ff);border-radius:24px}.calculator-practice-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:24px}.calculator-practice-heading>div{min-width:0;max-width:850px}.calculator-practice-heading h2{font-size:clamp(26px,3vw,38px);line-height:1.2;margin:12px 0}.calculator-practice-heading p{line-height:1.6;margin:0 0 24px;overflow-wrap:anywhere}.calculator-study-controls .formula-controls{grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.calculator-study-controls .field{min-width:0}.calculator-study-controls select{width:100%;max-width:100%;min-width:0}.calculator-study-controls .question-actions{align-items:center;gap:16px;margin-top:24px}.calculator-session-status{margin:24px 0 0;padding:14px 18px;border:1px solid #d9e6f4;border-radius:12px;background:#eaf2fc;color:#173758;font-weight:650;line-height:1.5}.calculator-study-grid[hidden],#calcSessionSettings[hidden]{display:none!important}#calcStudyLesson{padding:clamp(20px,3vw,36px);min-width:0;overflow:hidden;border-radius:24px}#calcStudyLesson h2{line-height:1.3;font-size:clamp(23px,2vw,30px)}#calcStudyLesson p{line-height:1.65;overflow-wrap:anywhere}#calcStudyLesson .training-givens{gap:12px}#calcStudyLesson .training-givens>div{padding:16px;min-width:0}#calcStudyLesson .formula-equation{padding:20px;overflow-x:auto}#calcStudyLesson .question-actions{gap:12px;margin:24px 0}#calcStudyLesson .source-note:empty{display:none}.calculator-question-heading{display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center}.calculator-entry-tag{padding:6px 12px;border-radius:20px;background:#eaf2fc;color:#315274;font-size:13px}.calculator-entry-help{padding:16px 0;display:grid;gap:14px}.calculator-entry-help a{overflow-wrap:anywhere}.calculator-practice-note{padding:16px 8px;line-height:1.6}.calculator-study-device{border-radius:24px;padding:16px}
@media(max-width:900px){.calculator-study-controls .formula-controls{grid-template-columns:repeat(2,minmax(0,1fr))}.calculator-practice-heading{flex-direction:column;gap:0}.calculator-practice-heading>button{margin-bottom:20px}}
@media(max-width:600px){.calculator-study-controls .formula-controls{grid-template-columns:1fr}.calculator-study-controls .question-actions{align-items:stretch;flex-direction:column}.calculator-study-controls .question-actions button{width:100%}#calcStudyLesson .question-actions button{flex:1 1 140px}.calculator-study-page{padding:16px}.calculator-study-grid .card{padding:20px}}
.owned-pdf-scroll{position:relative;overflow-anchor:none}.owned-pdf-pages{display:flex;flex-direction:column;align-items:center;gap:18px;min-width:max-content;padding-bottom:18px}.owned-pdf-pages .owned-pdf-paper{position:relative;flex:none;margin:0;overflow:hidden}.owned-pdf-scroll-label{margin-left:auto;color:#61718a;font-size:12px;white-space:nowrap}
/* Search docking changes layout without recreating search inputs or results. */
.pdf-panel-dock{display:flex;gap:8px;align-items:center;flex-wrap:wrap;padding:8px 0 14px;border-bottom:1px solid #d5e0ed;margin-bottom:14px}.pdf-panel-dock button,.pdf-panel-dock select{font:inherit;font-size:12px;padding:8px;border:1px solid #c6d4e5;border-radius:8px;background:#fff;color:#173758}.pdf-panel-grip{cursor:grab;touch-action:none}.pdf-panel-grip:active{cursor:grabbing}.pdf-panel-collapse{margin-left:auto}.pdf-panel-dragging{outline:3px dashed #2879c9;outline-offset:-5px}.pdf-panel-dragging:after{content:'Drop near the top for a top panel · Drop below for a side panel';position:fixed;bottom:20px;left:50%;transform:translateX(-50%);z-index:10010;padding:12px 20px;border-radius:12px;background:#102743;color:#fff;pointer-events:none;max-width:90vw}.library-workspace-v111.pdf-dock-top{grid-template-columns:minmax(0,1fr);grid-template-rows:auto minmax(0,1fr)}.library-workspace-v111.pdf-dock-top .library-control-panel{position:static;max-height:32dvh;overflow:auto;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;padding:16px}.library-workspace-v111.pdf-dock-top .library-control-panel>.pdf-panel-dock,.library-workspace-v111.pdf-dock-top .library-control-panel>.panel-heading,.library-workspace-v111.pdf-dock-top .library-search-block,.library-workspace-v111.pdf-dock-top .library-results,.library-workspace-v111.pdf-dock-top .library-status-inline{grid-column:1/-1}.library-workspace-v111.pdf-dock-top .panel-heading p,.library-workspace-v111.pdf-dock-top .library-control-divider{display:none}.library-workspace-v111.pdf-dock-top .panel-heading h2{margin:0;font-size:18px}.library-workspace-v111.pdf-dock-top .library-results{max-height:150px}.library-workspace-v111.pdf-dock-top.search-collapsed{grid-template-rows:minmax(0,1fr)}.library-workspace-v111.pdf-dock-top.search-collapsed .library-control-panel{display:none}
.exam-environment #referencePanel.pdf-dock-side,.exam-environment #referencePanel.pdf-dock-top{display:grid!important;grid-template-columns:minmax(0,1fr);grid-template-rows:auto auto auto auto minmax(0,1fr)}
.exam-environment #referencePanel.pdf-dock-side.search-open{grid-template-columns:minmax(200px,30%) minmax(0,1fr)}
.exam-environment #referencePanel:is(.pdf-dock-side,.pdf-dock-top)>.reference-library-head{grid-row:1;grid-column:1/-1}.exam-environment #referencePanel:is(.pdf-dock-side,.pdf-dock-top)>.reference-tabs{grid-row:2;grid-column:1/-1}.exam-environment #referencePanel:is(.pdf-dock-side,.pdf-dock-top)>.reference-quickbar{grid-row:3;grid-column:1/-1}.exam-environment #referencePanel:is(.pdf-dock-side,.pdf-dock-top)>.reference-status-line{grid-row:4;grid-column:1/-1}
.exam-environment #referencePanel.pdf-dock-side>.reference-search-drawer{grid-row:5;grid-column:1;position:static;width:auto;height:auto;min-height:0;max-height:none;overflow:auto}.exam-environment #referencePanel.pdf-dock-side>.pdf-viewer-frame-wrap{grid-row:5;grid-column:-2/-1;min-width:0;min-height:0}
.exam-environment #referencePanel.pdf-dock-top.search-open{grid-template-columns:minmax(0,1fr);grid-template-rows:auto auto auto auto minmax(90px,28dvh) minmax(0,1fr)}.exam-environment #referencePanel.pdf-dock-top>.reference-search-drawer{grid-row:5;grid-column:1;position:static;width:auto;max-height:none;height:auto;overflow:auto}.exam-environment #referencePanel.pdf-dock-top>.pdf-viewer-frame-wrap{grid-row:5;grid-column:1;min-width:0;min-height:0}.exam-environment #referencePanel.pdf-dock-top.search-open>.pdf-viewer-frame-wrap{grid-row:6}
.exam-environment .exam-mode-grid.reference-focus #referencePanel.pdf-dock-top.search-open,#referencePanel.pdf-dock-top:fullscreen.search-open{grid-template-columns:minmax(0,1fr);grid-template-rows:auto auto auto auto minmax(90px,28dvh) minmax(0,1fr)}
@media(max-width:760px){.library-workspace-v111.pdf-dock-top .library-control-panel{grid-template-columns:1fr 1fr}.exam-environment #referencePanel.pdf-dock-side.search-open{grid-template-columns:minmax(150px,35%) minmax(0,1fr)}.exam-environment .exam-mode-grid.reference-focus #referencePanel.pdf-dock-side.search-open{grid-template-columns:minmax(160px,35%) minmax(0,1fr)}.pdf-panel-dock{gap:4px}.pdf-panel-dock button,.pdf-panel-dock select{font-size:11px;padding:6px}.reference-search-row{flex-wrap:wrap}.reference-search-row input{min-width:0;width:100%}}
.library-workspace-v111.pdf-dock-top .panel-heading,.library-workspace-v111.pdf-dock-top .library-search-help{display:none}.library-workspace-v111.pdf-dock-top .pdf-panel-dock{margin:0;padding:0 0 8px}.library-workspace-v111.pdf-dock-top .library-search-block{grid-column:1/-1}.manual-window-expanded .owned-pdf-viewer,.library-workspace-v111:fullscreen .owned-pdf-viewer,#referencePanel:fullscreen .owned-pdf-viewer,.reference-focus .owned-pdf-viewer{min-height:0}
.calculator-study-controls .formula-controls{display:grid}
#calcStudyFeedback.calculator-feedback-correct{background:#eaf7ef;border:1px solid #91c9a7;color:#176339;font-weight:650}#calcStudyFeedback.calculator-feedback-incorrect{background:#fff0f0;border:1px solid #e8aaaa;color:#a32525;font-weight:650}
/* Stable PDF scrolling and explicit split-pane layout. */
.owned-pdf-scroll{scrollbar-gutter:stable;overflow-y:scroll;overflow-x:auto;touch-action:pan-x pan-y;scroll-behavior:auto!important;position:relative;min-height:0;min-width:0;flex:1 1 0;contain:layout paint;overflow-anchor:none}.owned-pdf-pages{display:block;min-width:100%;padding:0;gap:0}.owned-pdf-pages .owned-pdf-paper{margin-left:auto;margin-right:auto;contain:layout paint;overflow:hidden}.owned-pdf-spacer{width:1px;pointer-events:none}.owned-pdf-mode{display:flex;align-items:center;gap:6px;margin-left:auto}.owned-pdf-mode select{max-width:200px;padding:7px;border:1px solid #ccd7e4;border-radius:8px;background:#fff;font:inherit;color:#173758}.pdf-panel-dock label{display:flex;align-items:center;gap:10px;font-size:12px}.pdf-panel-divider{position:relative;min-width:0;min-height:0;background:#dce6f1;border-radius:7px;z-index:4}.pdf-panel-resize{position:absolute;inset:0;cursor:col-resize;touch-action:none;border-radius:7px}.pdf-panel-resize:focus-visible{outline:3px solid #297dcc}.pdf-panel-resize:after{content:'';position:absolute;top:45%;bottom:45%;left:4px;right:4px;border-left:2px solid #8b9eb5;border-right:2px solid #8b9eb5}.pdf-panel-arrow{position:absolute;top:calc(50% - 22px);left:calc(50% - 14px);width:28px;height:44px;padding:0;border:1px solid #b3c5db;border-radius:8px;background:#fff;color:#173758;font-size:27px;line-height:1;cursor:pointer;z-index:2}.pdf-dock-top .pdf-panel-resize{cursor:row-resize}.pdf-dock-top .pdf-panel-resize:after{top:4px;bottom:4px;left:45%;right:45%;border:0;border-top:2px solid #8b9eb5;border-bottom:2px solid #8b9eb5}.pdf-dock-top .pdf-panel-arrow{top:calc(50% - 14px);left:calc(50% - 22px);width:44px;height:28px;font-size:24px}.pdf-panel-closed .pdf-panel-resize{display:none}.pdf-panel-resizing{user-select:none}.pdf-panel-resizing .owned-pdf-scroll{pointer-events:none}
.library-workspace-v111.pdf-panel-layout{gap:8px;position:relative;height:calc(100dvh - 190px);min-height:520px;overflow:hidden;align-items:stretch}.library-workspace-v111.pdf-panel-layout.pdf-dock-side{grid-template-columns:minmax(160px,min(var(--pdf-panel-width,300px),45%)) 12px minmax(0,1fr);grid-template-rows:minmax(0,1fr)}.library-workspace-v111.pdf-panel-layout.pdf-dock-side.pdf-panel-closed{grid-template-columns:32px minmax(0,1fr)}.library-workspace-v111.pdf-panel-layout.pdf-dock-side>.library-control-panel{grid-column:1;grid-row:1}.library-workspace-v111.pdf-panel-layout.pdf-dock-side>.pdf-panel-divider{grid-column:2;grid-row:1}.library-workspace-v111.pdf-panel-layout.pdf-dock-side>.library-viewer{grid-column:3;grid-row:1}.library-workspace-v111.pdf-panel-layout.pdf-dock-side.pdf-panel-closed>.pdf-panel-divider{grid-column:1}.library-workspace-v111.pdf-panel-layout.pdf-dock-side.pdf-panel-closed>.library-viewer{grid-column:2}
.library-workspace-v111.pdf-panel-layout.pdf-dock-top{grid-template-columns:minmax(0,1fr);grid-template-rows:minmax(80px,var(--pdf-panel-height,190px)) 12px minmax(0,1fr)}.library-workspace-v111.pdf-panel-layout.pdf-dock-top.pdf-panel-closed{grid-template-rows:32px minmax(0,1fr)}.library-workspace-v111.pdf-panel-layout.pdf-dock-top>.library-control-panel{grid-column:1;grid-row:1;max-height:none}.library-workspace-v111.pdf-panel-layout.pdf-dock-top>.pdf-panel-divider{grid-column:1;grid-row:2}.library-workspace-v111.pdf-panel-layout.pdf-dock-top>.library-viewer{grid-column:1;grid-row:3}.library-workspace-v111.pdf-panel-layout.pdf-dock-top.pdf-panel-closed>.pdf-panel-divider{grid-row:1}.library-workspace-v111.pdf-panel-layout.pdf-dock-top.pdf-panel-closed>.library-viewer{grid-row:2}
.library-workspace-v111.pdf-panel-layout>.library-control-panel{position:static;min-height:0;max-height:none;height:100%;overflow:auto;margin:0;box-sizing:border-box}.library-workspace-v111.pdf-panel-layout>.library-viewer{height:100%;min-height:0;overflow:hidden;margin:0;box-sizing:border-box}.library-workspace-v111.pdf-panel-layout .library-pdf-wrap{height:auto;min-height:0;flex:1 1 0;overflow:hidden}.library-workspace-v111.pdf-panel-layout .owned-pdf-viewer{min-height:0}.library-workspace-v111.pdf-panel-layout.manual-window-expanded,.library-workspace-v111.pdf-panel-layout:fullscreen{position:fixed;height:100dvh;min-height:0}
.exam-environment #referencePanel.pdf-panel-layout{gap:6px;min-height:0;overflow:hidden}.exam-environment #referencePanel.pdf-panel-layout.pdf-dock-side{grid-template-columns:minmax(160px,min(var(--pdf-panel-width,300px),45%)) 12px minmax(0,1fr)!important;grid-template-rows:auto auto auto auto minmax(0,1fr)!important}.exam-environment #referencePanel.pdf-panel-layout.pdf-dock-side.pdf-panel-closed{grid-template-columns:32px minmax(0,1fr)!important}.exam-environment #referencePanel.pdf-panel-layout.pdf-dock-side>.pdf-panel-divider{grid-column:2;grid-row:5}.exam-environment #referencePanel.pdf-panel-layout.pdf-dock-side>.pdf-viewer-frame-wrap{grid-column:3;grid-row:5}.exam-environment #referencePanel.pdf-panel-layout.pdf-dock-side.pdf-panel-closed>.pdf-panel-divider{grid-column:1}.exam-environment #referencePanel.pdf-panel-layout.pdf-dock-side.pdf-panel-closed>.pdf-viewer-frame-wrap{grid-column:2}
.exam-environment #referencePanel.pdf-panel-layout.pdf-dock-top{grid-template-columns:minmax(0,1fr)!important;grid-template-rows:auto auto auto auto minmax(80px,var(--pdf-panel-height,190px)) 12px minmax(0,1fr)!important}.exam-environment #referencePanel.pdf-panel-layout.pdf-dock-top.pdf-panel-closed{grid-template-rows:auto auto auto auto 32px minmax(0,1fr)!important}.exam-environment #referencePanel.pdf-panel-layout.pdf-dock-top>.pdf-panel-divider{grid-row:6;grid-column:1}.exam-environment #referencePanel.pdf-panel-layout.pdf-dock-top>.pdf-viewer-frame-wrap{grid-row:7;grid-column:1}.exam-environment #referencePanel.pdf-panel-layout.pdf-dock-top.pdf-panel-closed>.pdf-panel-divider{grid-row:5}.exam-environment #referencePanel.pdf-panel-layout.pdf-dock-top.pdf-panel-closed>.pdf-viewer-frame-wrap{grid-row:6}.exam-environment #referencePanel.pdf-panel-layout .reference-search-drawer{position:static;width:auto;height:100%;min-height:0;max-height:none;overflow:auto;box-sizing:border-box}.exam-environment #referencePanel.pdf-panel-layout .pdf-viewer-frame-wrap,.exam-environment #referencePanel.pdf-panel-layout #manualViewer,.exam-environment #referencePanel.pdf-panel-layout .owned-pdf-viewer{min-height:0;height:100%;overflow:hidden}
@media(max-width:760px){.library-workspace-v111.pdf-panel-layout{height:calc(100dvh - 170px);min-height:450px}.library-workspace-v111.pdf-panel-layout.manual-window-expanded,.library-workspace-v111.pdf-panel-layout:fullscreen{height:100dvh;min-height:0}.owned-pdf-mode{margin-left:0}.owned-pdf-mode select{max-width:180px}.pdf-panel-layout .library-viewer-head h2{font-size:16px}.library-workspace-v111.pdf-panel-layout.pdf-dock-side{grid-template-columns:minmax(130px,min(var(--pdf-panel-width,220px),40%)) 12px minmax(0,1fr)}}

/* Learn mode choices and exam-day guidance */
#learnChoices[hidden],#learnSections[hidden]{display:none!important}.exam-tips-page{max-width:1050px}.exam-tips-hero,.exam-tips-section{padding:clamp(24px,4vw,44px);margin-bottom:22px}.exam-tips-section p,.exam-tips-section li{line-height:1.8;max-width:78ch}.exam-tips-section h3{margin-top:28px}.exam-tips-section li{margin-bottom:10px}.exam-tips-jump{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}.exam-tips-jump a{padding:10px 14px;background:#edf4fc;border-radius:10px}.exam-tips-callout{padding:20px 24px;border-left:4px solid #2264aa;background:#edf4fc;border-radius:12px}.exam-tips-section{scroll-margin-top:20px}#learnSections>.practice-back-link{margin:12px 0 20px}
/* Home overview: welcome, plan, progress, activities, coverage, performance. */
.dashboard-home .dashboard-intro{margin-bottom:24px}.home-section-heading{margin-bottom:20px}.home-section-heading h2{margin:8px 0}.home-section-heading p{color:#65758a;line-height:1.6}.home-overview-section{margin:28px 0}.home-overview-metrics{grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.home-overview-metrics>div{min-width:0;padding:22px;border:1px solid #dbe4ee;border-radius:16px;background:#fff}.home-overview-metrics strong{overflow-wrap:anywhere}.dashboard-home .home-nav-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.dashboard-home .home-nav-card{padding:24px;display:flex;flex-direction:column;gap:10px}.dashboard-home .home-nav-card h3{font-size:1.2rem;margin:0}.dashboard-home .home-nav-card p{line-height:1.65;flex:1;margin:0}.home-topic-summary{padding:22px;background:#fff;border:1px solid #dbe4ee;border-radius:16px;margin:20px 0}.home-topic-checklist{display:grid;gap:12px;margin-top:16px}.home-topic-checklist>div{display:flex;justify-content:space-between;gap:20px;border-bottom:1px solid #edf1f5;padding-bottom:10px}.home-performance{padding:28px}.home-readiness{padding:20px;background:#f1f6fc;border-radius:14px;margin-top:20px}.home-readiness p{line-height:1.6}@media(max-width:900px){.dashboard-home .home-nav-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:600px){.home-overview-metrics{grid-template-columns:repeat(2,minmax(0,1fr))}.dashboard-home .home-nav-grid{grid-template-columns:1fr}.home-performance{padding:22px}.home-overview-metrics>div{padding:18px}.home-topic-checklist>div{flex-direction:column;gap:4px}}

.home-overview-metrics{border:0;background:transparent;margin:20px 0}.home-overview-metrics>div:last-child{border:1px solid #dbe4ee}

/* Home activity navigation grouped horizontally by study mode. */
.home-activity-menu{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));background:#fff;border:1px solid #dbe4ee;border-radius:18px;padding:28px 8px;box-shadow:0 8px 24px #12345608}.home-activity-group{min-width:0;padding:0 24px}.home-activity-group+.home-activity-group{border-left:1px solid #e3eaf2}.home-activity-group h3{font-size:1.3rem;color:#15365c;margin:0 0 18px;padding-bottom:12px;border-bottom:2px solid #dce9f9}.home-activity-group ul{list-style:none;margin:0;padding:0;display:grid;gap:4px}.home-activity-group a{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:44px;padding:10px 4px;color:#284768;text-decoration:none;line-height:1.5;overflow-wrap:anywhere}.home-activity-group a>span:last-child{color:#6785a7}.home-activity-group a:hover{color:#2166b3;text-decoration:underline}.home-activity-group a:focus-visible{outline:3px solid #3278c9;outline-offset:3px;border-radius:4px}@media(max-width:650px){.home-activity-menu{grid-template-columns:1fr;padding:8px 22px}.home-activity-group{padding:22px 0}.home-activity-group+.home-activity-group{border-left:0;border-top:1px solid #e3eaf2}.home-activity-group h3{margin-bottom:12px}}

/* Keep a useful reading area when the Library search controls are above the PDF.
   Normal pages may scroll; expanded windows divide the available screen instead. */
.library-workspace-v111.pdf-panel-layout:not(.manual-window-expanded):not(:fullscreen){min-height:680px}
.library-workspace-v111.pdf-panel-layout.pdf-dock-top:not(.pdf-panel-closed):not(.manual-window-expanded):not(:fullscreen){min-height:calc(var(--pdf-panel-height,240px) + 620px)}
.library-workspace-v111.pdf-panel-layout .library-viewer-head,
.library-workspace-v111.pdf-panel-layout .reference-index-note{flex:0 0 auto}
.library-workspace-v111.pdf-panel-layout:not(.manual-window-expanded):not(:fullscreen) .library-pdf-wrap{min-height:420px}
.library-workspace-v111.pdf-panel-layout .library-pdf-wrap{display:flex;flex-direction:column}
.library-workspace-v111.pdf-panel-layout .library-pdf-wrap>.owned-pdf-viewer{flex:1 1 0;min-height:0;height:auto}
@media(max-width:760px){
  .library-workspace-v111.pdf-panel-layout:not(.manual-window-expanded):not(:fullscreen){min-height:620px}
  .library-workspace-v111.pdf-panel-layout.pdf-dock-top:not(.pdf-panel-closed):not(.manual-window-expanded):not(:fullscreen){min-height:calc(var(--pdf-panel-height,240px) + 580px)}
  .library-workspace-v111.pdf-panel-layout:not(.manual-window-expanded):not(:fullscreen) .library-pdf-wrap{min-height:360px}
}
.library-workspace-v111.pdf-panel-layout.pdf-dock-top.manual-window-expanded:not(.pdf-panel-closed),
.library-workspace-v111.pdf-panel-layout.pdf-dock-top:fullscreen:not(.pdf-panel-closed){grid-template-rows:minmax(80px,min(var(--pdf-panel-height,240px),25dvh)) 12px minmax(0,1fr)}
/* Search results must remain reachable inside a short top-docked control panel. */
.library-workspace-v111.pdf-panel-layout.pdf-dock-top>.library-control-panel{grid-auto-rows:max-content;align-content:start}
.library-workspace-v111.pdf-panel-layout.pdf-dock-top .library-results:not(:empty){min-height:120px;max-height:150px}
.practice-remediation{margin:18px 0;padding:20px;border:1px solid #c8d8e9;border-radius:14px;background:#f5f9fe}
.practice-remediation h3{margin:0 0 10px}.practice-remediation p{line-height:1.55;margin:0 0 12px}.practice-remediation summary{font-weight:700;cursor:pointer}.practice-remediation li{margin:8px 0}.practice-remediation .question-actions{margin-top:16px;flex-wrap:wrap}.practice-remediation[hidden]{display:none}

/* Persistent exam study tools; iframe and PDF state survive view switches. */
.exam-workspace-tools{display:flex;align-items:center;flex-wrap:wrap;gap:8px;padding:12px 16px;background:#f2f6fb;border-bottom:1px solid #d8e2ef}
.exam-workspace-tools button{padding:9px 14px;min-height:40px;width:auto}.exam-workspace-tools button.active{background:#e1efff;border-color:#2166b8}
.exam-tools-pane{min-width:0;display:block}.exam-tools-pane>[hidden],.exam-calculator-frames>iframe[hidden]{display:none!important}
.exam-calculator-pane{min-width:0;padding:16px;background:#f4f7fb;border:1px solid #d8e2ef;border-radius:12px}
.exam-calculator-header label{display:flex;align-items:center;gap:12px;font-weight:700}.exam-calculator-header select{min-width:0;max-width:100%;flex:1;padding:10px;border-radius:9px;border:1px solid #c8d7e8;background:#fff}
.exam-calculator-pane>p{font-size:12px;line-height:1.5;margin:12px 0}.exam-calculator-frames iframe{display:block;width:100%;height:760px;border:0;background:#f4f7fb;border-radius:10px}
.exam-mode-grid[data-tool-view="both"]>.exam-tools-pane{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:10px}
.exam-mode-grid.tools-hidden{grid-template-columns:minmax(0,1fr)!important}.exam-mode-grid.tools-hidden>.exam-tools-pane,.exam-mode-grid.tools-hidden>.exam-split-divider{display:none!important}
@media(max-width:980px){.mobile-exam-view-tabs{grid-template-columns:repeat(3,minmax(0,1fr))}.exam-workspace-tools{display:none}.exam-mode-grid>.exam-tools-pane{grid-column:1;min-width:0}.exam-mode-grid[data-mobile-view="question"]>.exam-tools-pane{display:none!important}.exam-mode-grid[data-mobile-view="calculator"]>.exam-question,.exam-mode-grid[data-mobile-view="calculator"]>.exam-split-divider{display:none!important}.exam-mode-grid[data-mobile-view="calculator"]>.exam-tools-pane{display:block!important}.exam-mode-grid[data-mobile-view="reference"]>.exam-tools-pane{display:block!important}.exam-mode-grid[data-mobile-view="reference"] .reference-library{display:block}.exam-calculator-frames iframe{height:780px}.exam-calculator-pane{padding:12px}}
#examToolsPane>#referencePanel[hidden],#examToolsPane>.exam-calculator-pane[hidden]{display:none!important}

/* Keep the library open action sized like its neighboring search control. */
.library-control-panel #libraryOpenBtn{width:auto;min-height:45px;padding:10px 16px;font-size:16px;line-height:1.4;justify-content:center;justify-self:start;align-self:end;margin:0 0 13px;white-space:nowrap}

/* Taller document reading area with independently sized search controls. */
.library-workspace-v111.pdf-panel-layout:not(.manual-window-expanded):not(:fullscreen){height:auto;min-height:1100px}
.library-workspace-v111.pdf-panel-layout:not(.manual-window-expanded):not(:fullscreen) .library-pdf-wrap{min-height:840px}
.library-workspace-v111.pdf-panel-layout.pdf-dock-top:not(.pdf-panel-closed):not(.manual-window-expanded):not(:fullscreen){min-height:calc(var(--pdf-panel-height,240px) + 1040px)}
.library-workspace-v111.pdf-panel-layout.pdf-dock-side:not(.manual-window-expanded):not(:fullscreen)>.library-control-panel{height:auto;max-height:calc(100dvh - 190px);align-self:start}
.exam-environment .exam-mode-grid:not(.reference-focus) #referencePanel.pdf-panel-layout:not(:fullscreen){min-height:1100px}
.exam-environment .exam-mode-grid:not(.reference-focus) #referencePanel.pdf-panel-layout:not(:fullscreen) .pdf-viewer-frame-wrap{min-height:840px}
.exam-environment .exam-mode-grid:not(.reference-focus) #referencePanel.pdf-panel-layout.pdf-dock-side:not(:fullscreen) .reference-search-drawer{height:auto;max-height:calc(100dvh - 190px);align-self:start}
.pdf-panel-divider{background:transparent;box-shadow:none;border:0}
.pdf-panel-resize:after{display:none}
.pdf-panel-resize:hover{background:#2166b80a}
@media(max-width:760px){
 .library-workspace-v111.pdf-panel-layout:not(.manual-window-expanded):not(:fullscreen){min-height:980px}
 .library-workspace-v111.pdf-panel-layout:not(.manual-window-expanded):not(:fullscreen) .library-pdf-wrap{min-height:720px}
 .library-workspace-v111.pdf-panel-layout.pdf-dock-top:not(.pdf-panel-closed):not(.manual-window-expanded):not(:fullscreen){min-height:calc(var(--pdf-panel-height,240px) + 920px)}
 .exam-environment .exam-mode-grid:not(.reference-focus) #referencePanel.pdf-panel-layout:not(:fullscreen){min-height:980px}
 .exam-environment .exam-mode-grid:not(.reference-focus) #referencePanel.pdf-panel-layout:not(:fullscreen) .pdf-viewer-frame-wrap{min-height:720px}
}

/* Collapse control follows the search panel edge, independent of document height. */
.pdf-dock-side:not(.pdf-panel-closed)>.pdf-panel-divider>.pdf-panel-arrow{top:calc(var(--pdf-search-panel-height,480px)/2 - 22px);left:-22px}
.pdf-dock-top:not(.pdf-panel-closed)>.pdf-panel-divider>.pdf-panel-arrow{top:-22px}
.pdf-panel-closed>.pdf-panel-divider>.pdf-panel-arrow{top:16px}
.pdf-dock-top.pdf-panel-closed>.pdf-panel-divider>.pdf-panel-arrow{top:2px}

.exam-tutorial-choice{display:flex;align-items:center;gap:10px;margin:18px 0;font-weight:650}.exam-tutorial-choice input{width:18px;height:18px;accent-color:var(--blue)}

/* Compact practice typography without shrinking answer controls. */
.practice-column .question-prompt{font-size:18px;line-height:1.5;font-weight:600;letter-spacing:-.01em;margin:14px 0 10px}
.practice-column .question-details,.practice-column .option-text,.practice-column .solution-steps{font-size:15px;line-height:1.55}
.practice-column .question-prompt .katex{font-size:1.05em;font-weight:400}
.practice-column .katex-display{margin:.55em 0;white-space:normal;line-height:1.3}
.practice-column .question-data-equation{font-size:1.3rem;line-height:1.4}
.practice-column .question-data-equation>.katex-display>.katex,.practice-column .question-data-equation>.katex,.practice-column .question-formula-equation .katex-display>.katex,.practice-column .question-formula-equation>.katex{font-size:1.3rem!important}
.practice-column .question-v3-math{padding:16px 18px;margin:14px 0}
@media(max-width:620px){.practice-column .question-prompt{font-size:17px}.practice-column .question-data-equation>.katex-display>.katex,.practice-column .question-data-equation>.katex,.practice-column .question-formula-equation .katex-display>.katex,.practice-column .question-formula-equation>.katex{font-size:1.15rem!important}}

/* Formula reference: readable sources and compact expandable study notes. */
.formula-reference-page{max-width:1180px;margin:24px auto;padding:0 20px;display:grid;gap:20px}
.formula-reference-page .card{padding:28px}
.formula-reference-controls{display:grid;grid-template-columns:1.5fr 1fr;gap:20px;margin:22px 0}
.formula-reference-group{margin-bottom:20px}
.formula-reference-entry{border:1px solid #dce5ef;border-radius:14px;padding:22px;margin-top:18px;background:#fff;break-inside:avoid}
.formula-reference-entry h3{margin:0 0 14px;font-size:20px}
.reference-equation{overflow-x:auto;font-size:1.08rem;padding:10px 4px}
.reference-sources{color:#53657e;font-size:14px;border-top:1px solid #e3eaf2;margin-top:12px}
.reference-sources p{line-height:1.6}
.formula-reference-entry summary{cursor:pointer;font-weight:650;padding:12px 0;color:#185ba8}
.reference-notes{background:#f4f8fc;padding:18px;border-radius:10px;line-height:1.6}
.reference-notes h4{margin:14px 0 6px}.reference-notes h4:first-child{margin-top:0}
.reference-notes p{margin:0}.reference-notes ul{padding-left:22px}
#conversionLibrary{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
@media(max-width:700px){.formula-reference-page{padding:0 12px}.formula-reference-page .card{padding:20px}.formula-reference-controls,#conversionLibrary{grid-template-columns:1fr}.formula-reference-entry{padding:16px}.reference-equation{font-size:.95rem}}
@media print{.formula-reference-page .question-actions,.formula-reference-controls,.topbar,.site-footer,.practice-back-link{display:none!important}.formula-reference-page{max-width:none;padding:0}.formula-reference-page .card{box-shadow:none;padding:12px}.reference-notes{background:white}#conversionLibrary{display:block}}
.formula-reference-controls input[type=search]{width:100%;box-sizing:border-box;border:1px solid #c8d6e7;border-radius:12px;padding:13px 16px;background:#fff;color:#192b43;font:inherit;min-height:46px}
.formula-reference-controls input[type=search]:focus{outline:2px solid #1d64b7;outline-offset:2px}
.reference-lookup-table{border-top:1px solid #d5dfeb;margin-top:20px;padding-top:12px}
.reference-table-source{font-size:13px;color:#53657e;margin-bottom:10px!important}
.reference-table-scroll{overflow-x:auto;margin:12px 0;border:1px solid #ccd9e7;border-radius:8px;background:white}
.reference-table-scroll table{width:100%;border-collapse:collapse;min-width:330px;font-size:14px;text-align:left}
.reference-table-scroll th,.reference-table-scroll td{padding:11px 13px;border-bottom:1px solid #e0e7ef;vertical-align:top}
.reference-table-scroll thead{background:#e9f1fa}.reference-table-scroll tbody tr:nth-child(even){background:#f7fafd}
.reference-lookup-table li{font-size:14px;line-height:1.6}
.reference-example{margin-top:20px;padding:18px;background:#fff;border:1px solid #cddded;border-left:4px solid #2164ad;border-radius:10px}
.reference-example .reference-equation{font-size:1rem}
.reference-table-scroll .visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.formula-reference-page>*{min-width:0}
.formula-reference-group,.formula-reference-entry,.reference-notes,.reference-example,.reference-lookup-table,.formula-reference-controls .field{min-width:0;max-width:100%;box-sizing:border-box}
.formula-reference-page select{width:100%;min-width:0}
.formula-reference-page .question-actions>*{max-width:100%;white-space:normal}
.reference-conversions{margin-top:20px}
.reference-conversions>summary{display:inline-flex;cursor:pointer;list-style:none}
.reference-conversions>summary::-webkit-details-marker{display:none}
.reference-conversions>summary::after{content:'▾';margin-left:12px}
.reference-conversions[open]>summary::after{content:'▴'}
.reference-conversion-content{padding:24px 0 4px;min-width:0}
.reference-conversion-content table{width:100%;border-collapse:collapse;font-size:.95rem}
.reference-conversion-content th,.reference-conversion-content td{padding:10px 12px;text-align:left;border-bottom:1px solid #dbe5f0}
.reference-conversion-content thead{background:#eef4fb}
@media print{.reference-conversions{display:block}.reference-conversion-content{display:block}}
.reference-equation.reference-procedure{font-size:1rem;line-height:1.6;color:#42546d;background:#f3f7fc;border-radius:10px;padding:14px 16px;overflow-wrap:anywhere}
/* Clear study priorities and discoverable lesson disclosures. */
.formula-priority{display:inline-flex;align-items:center;font-size:.75rem;font-weight:750;line-height:1.3;padding:5px 9px;border:1px solid;border-radius:999px;white-space:normal}
.priority-high{color:#165b36;background:#e5f5eb;border-color:#a7d8b9}.priority-should{color:#795500;background:#fff5d6;border-color:#e8ce7d}.priority-uncommon{color:#9a3030;background:#fff0ef;border-color:#eab1ae}
.reference-entry-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}.reference-entry-heading h3{margin-bottom:0}.formula-priority-legend{display:flex;gap:8px;flex-wrap:wrap;margin-top:18px}.formula-priority-legend p{flex-basis:100%;font-size:.85rem;color:var(--muted);margin:2px 0 0}
.learn-page details>summary,.learn-module details>summary{color:#1764b3;cursor:pointer;border-radius:8px;padding:10px 12px;background:#edf5ff;border:1px solid #c9ddf5;line-height:1.5;margin:8px 0;font-weight:700}
.learn-page details>summary:hover,.learn-module details>summary:hover{background:#deecff}.learn-page details>summary:focus-visible{outline:3px solid #3e85d0;outline-offset:3px}.learn-page summary small{display:block;font-weight:400;font-size:.82rem;margin-left:18px;color:#38658e}
.learn-skill-card{background:#fff;border:1px solid #d8e4f0;border-radius:12px;padding:12px;margin:14px 0}.learn-skill-body{padding:8px 12px 16px}.learn-skill-body>h5{margin-top:22px}.learn-skill-body p,.learn-skill-body li{line-height:1.65}.learn-skill-body>ol,.learn-skill-body>ul{background:#f5f8fc;padding:14px 16px 14px 36px;border-radius:8px}.learn-study-guide-section article.learn-concept{padding:18px;background:#fff;border:1px solid #dce6f1;border-radius:10px;margin:12px 0}.learn-study-guide-section article.learn-concept h5{margin-bottom:10px}
.signal-warrant-overview{margin:22px 0;padding:22px;background:#eef6ff;border:1px solid #b6d4f2;border-radius:14px}.warrant-step-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:18px 0}.warrant-step-grid article,.warrant-check{padding:16px;background:#fff;border:1px solid #d5e3f0;border-radius:10px}.warrant-step-grid p{line-height:1.55}.warrant-families{columns:2;column-gap:28px}.warrant-families li{break-inside:avoid;padding:4px 0}.warrant-check{margin-top:18px}.learn-logic-note{padding:14px;background:#eaf4ff;border-left:4px solid #2d75b9;border-radius:6px}
@media(max-width:640px){.warrant-step-grid{grid-template-columns:1fr}.warrant-families{columns:1}.signal-warrant-overview{padding:16px}.learn-skill-body{padding:6px 4px 12px}}
.learn-method-paragraph{padding:14px;background:#f4f8fc;border-radius:8px;margin:10px 0!important}.learn-reading-pointers{margin:20px 0;padding:20px;background:#f0f7ff;border:1px solid #c6def5;border-radius:12px}.learn-reading-card{padding:16px;background:white;border:1px solid #d7e4f1;border-radius:10px;margin:12px 0}.learn-reading-card h5{margin:0 0 8px}.learn-reading-card p{line-height:1.55}.learn-reading-card details button{margin:6px 6px 0 0;white-space:normal;text-align:left}
.learn-reference-panel{position:fixed;right:12px;top:12px;bottom:12px;width:min(47vw,760px);z-index:80;background:#fff;border:1px solid #c4d6e8;border-radius:16px;padding:16px;display:flex;flex-direction:column;gap:10px;box-shadow:0 8px 35px #0c234026;overflow:hidden}.learn-reference-panel.hidden{display:none}.learn-reference-panel>header{display:flex;align-items:center;gap:8px}.learn-reference-panel>header>div{flex:1;min-width:0}.learn-reference-panel h2{font-size:1.05rem;margin:4px 0}.learn-reference-panel header button{padding:8px 10px;font-size:.82rem}.learn-reference-focus{background:#eef6ff;padding:12px;border-radius:8px;font-size:.85rem;line-height:1.45;max-height:170px;overflow:auto}.learn-reference-focus p{margin:6px 0}.learn-reference-focus ul{padding-left:20px;margin:4px 0}.learn-reference-search{display:flex;align-items:end;gap:8px}.learn-reference-search label{flex:1;font-size:.82rem;min-width:0}.learn-reference-search input{display:block;width:100%;margin-top:4px}.learn-reference-search button{padding:10px}.learn-reference-results{display:flex;flex-wrap:wrap;gap:6px;max-height:120px;overflow:auto}.learn-reference-results:empty{display:none}.learn-reference-results button{font-size:.8rem;padding:6px}.learn-reference-panel [data-status]{font-size:.8rem;margin:0}.learn-reference-pdf.owned-pdf-viewer{flex:1;min-height:240px;height:auto!important}.learn-reference-pdf .owned-pdf-scroll{min-height:0;flex:1}.learn-reference-panel.is-expanded{width:calc(100vw - 24px)}
@media(min-width:1100px){body.learn-reference-open .learn-page{width:calc(50vw - 40px);margin-left:20px;margin-right:0}body.learn-reference-open .learn-topic-grid,body.learn-reference-open .learn-hero-grid{grid-template-columns:1fr}}
@media(max-width:1099px){.learn-reference-panel{width:calc(100vw - 24px)}}
/* Priority explanations on hover, keyboard focus and touch focus. */
.formula-priority[data-priority-description]{position:relative;cursor:help}
.formula-priority[data-priority-description]::after{content:attr(data-priority-description);position:absolute;left:0;top:calc(100% + 8px);width:min(290px,70vw);padding:12px 14px;background:#0c2340;color:#fff;border-radius:9px;box-shadow:0 4px 16px #0c234033;font-size:.82rem;font-weight:400;line-height:1.5;white-space:normal;z-index:20;opacity:0;visibility:hidden;pointer-events:none}
.reference-entry-heading .formula-priority[data-priority-description]::after{left:auto;right:0}
.formula-priority[data-priority-description]:hover::after,.formula-priority[data-priority-description]:focus::after{opacity:1;visibility:visible}
.formula-priority[data-priority-description]:focus-visible{outline:3px solid #337dbe;outline-offset:3px}
@media print{.formula-priority[data-priority-description]::after{display:none}}
.formula-procedure{font-size:1rem!important;line-height:1.55;padding:14px 16px;background:#f1f6fc;border:1px solid #d6e3f1;border-radius:10px;text-align:left;overflow-wrap:anywhere}
/* Keep the expanded formula bank within small screens; long equations scroll inside their choice. */
.formula-layout{min-width:0;grid-template-columns:minmax(0,1fr)}
.formula-layout>.card,.formula-options,.formula-options label{min-width:0}
.formula-controls .field{min-width:0}
.formula-controls select{min-width:0;max-width:100%;width:100%}
.formula-layout h2 .katex{display:inline-block;max-width:100%;overflow-x:auto;vertical-align:middle}
@media(max-width:650px){.formula-controls .field{flex-basis:100%}.formula-layout{width:100%}}
@media(min-width:1100px){body.learn-reference-open .formula-reference-page{width:calc(50vw - 40px);max-width:none;margin-left:20px;margin-right:0}body.learn-reference-open .formula-reference-controls{grid-template-columns:1fr;flex-direction:column}}
@media print{.learn-reference-panel{display:none!important}body.learn-reference-open .formula-reference-page{width:100%;margin:0}}

/* Exam results report, readiness index, alternative item formats */
.alt-format-hint { margin: 0 0 8px; font-size: .9rem; opacity: .8; font-style: italic; }
.exam-report { margin-top: 10px; }
.exam-report summary { cursor: pointer; font-weight: 600; }
.report-table-wrap { overflow-x: auto; }
.exam-report-table { width: 100%; border-collapse: collapse; font-size: .9rem; margin: 8px 0; }
.exam-report-table th, .exam-report-table td { text-align: left; padding: 6px 8px; border-bottom: 1px solid rgba(127,127,127,.25); vertical-align: top; }
.exam-report-table tr.report-weak td:first-child a { font-weight: 700; }
.exam-report-table tr.report-weak td:nth-child(3) { color: #b42318; font-weight: 700; }
.readiness-delta { font-size: .9rem; margin-left: 6px; }
.readiness-spark { display: block; margin: 6px 0; color: currentColor; opacity: .8; }
.readiness-rows { display: grid; gap: 8px; margin-top: 8px; }
.readiness-row { display: grid; grid-template-columns: minmax(140px, 1.3fr) 2fr auto; gap: 4px 10px; align-items: center; text-decoration: none; color: inherit; }
.readiness-row small { grid-column: 1 / -1; opacity: .7; }
.readiness-bar { height: 8px; border-radius: 4px; background: rgba(127,127,127,.2); overflow: hidden; }
.readiness-bar > span { display: block; height: 100%; background: currentColor; opacity: .7; }

/* Floating Learn assistant */
.study-assistant{position:fixed;right:24px;bottom:22px;z-index:1000;font-family:inherit}.study-assistant-launch{display:flex;align-items:center;gap:9px;border:0;border-radius:999px;padding:13px 18px;background:#0c2340;color:#fff;box-shadow:0 8px 28px #0c234044;font-weight:800;cursor:pointer}.study-assistant-launch span:first-child{font-size:18px;color:#9fd5ff}.study-assistant-panel{position:absolute;right:0;bottom:64px;width:min(390px,calc(100vw - 28px));height:min(590px,calc(100dvh - 110px));display:flex;flex-direction:column;background:#fff;border:1px solid #d8e4ef;border-radius:18px;box-shadow:0 18px 55px #0c234033;overflow:hidden}.study-assistant-panel.hidden{display:none}.study-assistant-header{display:flex;align-items:center;justify-content:space-between;padding:15px 17px;background:#0c2340;color:#fff}.study-assistant-header>div{display:grid;gap:3px}.study-assistant-header strong{font-size:14px}.study-assistant-header small{font-size:11px;color:#c5d8eb}.study-assistant-header button{border:0;background:transparent;color:#fff;font-size:25px;cursor:pointer}.study-assistant-modes{display:grid;grid-template-columns:1fr 1fr;padding:10px 12px 0;gap:6px}.study-assistant-modes button{border:1px solid #d8e4ef;border-radius:9px;padding:9px 6px;background:#f7f9fc;color:#42556b;font-weight:750;cursor:pointer}.study-assistant-modes button.active{background:#eaf3ff;border-color:#8db6e6;color:#0c4a84}.study-assistant-hint{margin:8px 15px 0;color:#637388;font-size:11px}.study-assistant-thread{flex:1;overflow:auto;display:flex;flex-direction:column;gap:9px;padding:13px}.study-assistant-message{max-width:94%;padding:10px 12px;border-radius:12px;background:#f2f6fb;font-size:13px;line-height:1.5;overflow-wrap:anywhere}.study-assistant-message.user{align-self:flex-end;background:#eaf3ff}.study-assistant-message>strong{font-size:10px;text-transform:uppercase;letter-spacing:.07em;color:#586b80}.study-assistant-message p{margin:4px 0 0;white-space:normal}.study-assistant-form{display:grid;grid-template-columns:1fr auto;align-items:end;gap:8px;padding:11px;border-top:1px solid #e1e8ef}.study-assistant-form textarea{width:100%;resize:vertical;min-height:43px;max-height:110px;border:1px solid #cbd8e5;border-radius:10px;padding:10px;font:inherit;font-size:13px}.study-assistant-form .primary-button{min-height:42px;padding:9px 13px}.study-assistant-action{display:grid;gap:6px;margin-top:9px;padding:9px;border:1px solid #c8dced;border-radius:9px;background:#fff;font-size:12px}.study-assistant-action>strong{color:#36536e;font-size:10px;text-transform:uppercase;letter-spacing:.06em}.study-assistant-action-error{margin:0;color:#a12d2d;font-size:11px}.study-assistant-action.saved{border-color:#77b68a;background:#f2fbf4}.study-assistant-action button{justify-self:start;padding:7px 10px;font-size:11px}.study-assistant-action.saved button{display:none}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(max-width:620px){.study-assistant{right:12px;bottom:12px}.study-assistant-launch{padding:12px 15px}.study-assistant-panel{position:fixed;left:10px;right:10px;bottom:72px;width:auto;height:min(590px,calc(100dvh - 96px))}.study-assistant-form{grid-template-columns:1fr auto}}

/* Professor poses and minimize controls */
.study-assistant-launch{gap:8px;padding:5px 16px 5px 5px;min-height:66px}.study-assistant-avatar{position:relative;display:block;flex:none;width:65px;height:72px;overflow:hidden}.study-assistant-avatar img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;object-position:center bottom;display:none}.study-assistant-avatar[data-state="idle"] .assistant-avatar-idle{display:block}.study-assistant-avatar[data-state="hover"] .assistant-avatar-hover{display:block}.study-assistant-avatar[data-state="answering"] .assistant-avatar-answering{display:block}.study-assistant-minimized{position:fixed;right:0;bottom:24px;z-index:1001;width:30px;height:66px;padding:0;border:1px solid #9bb3cc;border-right:0;border-radius:12px 0 0 12px;background:#0c2340;color:#fff;box-shadow:0 5px 22px #0c234044;font-size:25px;line-height:1;cursor:pointer}.study-assistant-context{position:fixed;z-index:1100;min-width:170px;padding:5px;background:#fff;border:1px solid #d8e4ef;border-radius:10px;box-shadow:0 8px 28px #0c234033}.study-assistant-context.hidden{display:none}.study-assistant-context button{width:100%;padding:9px 11px;border:0;border-radius:7px;background:#fff;color:#20364e;text-align:left;font:inherit;font-size:13px;cursor:pointer}.study-assistant-context button:hover,.study-assistant-context button:focus-visible{background:#edf4fb}.study-assistant-launch:focus-visible{outline:3px solid #7bb8fa;outline-offset:3px}

/* Keep the assistant launcher quiet beside the lesson content. */
.study-assistant-launch{min-height:0;gap:5px;padding:0;border:0;border-radius:0;background:transparent;color:#111;box-shadow:none}
.study-assistant-launch:hover,.study-assistant-launch:focus-visible{background:transparent;color:#111}
.study-assistant-label{color:#111}

/* Icon-only assistant launcher. */
.study-assistant-launch{width:88px;height:92px;min-height:0;justify-content:center;gap:0;padding:0;border:0;border-radius:0;background:transparent;color:transparent;box-shadow:none}
.study-assistant-launch:hover,.study-assistant-launch:focus-visible{background:transparent;color:transparent}
.study-assistant-avatar{width:82px;height:90px}
.study-assistant-launch:focus-visible{outline:2px solid #607d9a;outline-offset:2px}
.account-assistant-setting{grid-column:1/-1;padding:14px 16px;border:1px solid #dbe3eb;border-radius:12px;background:#f8fafc}
.account-assistant-toggle{display:flex;align-items:center;gap:10px;color:#182536;font-weight:600}
.account-assistant-toggle input{width:18px;height:18px;margin:0;accent-color:#0c2340}
.study-assistant-panel{bottom:108px;height:min(590px,calc(100dvh - 154px))}
.study-assistant-mobile-hide{display:none;border:0;padding:5px 8px;background:transparent;color:#d6e5f4;font:inherit;font-size:12px;text-decoration:underline;cursor:pointer}
@media(max-width:620px){.study-assistant-panel{bottom:calc(132px + env(safe-area-inset-bottom));height:min(590px,calc(100dvh - 148px - env(safe-area-inset-bottom)))}.study-assistant-mobile-hide{display:inline-flex;align-items:center}.study-assistant-form textarea{font-size:16px}.study-assistant-thread{min-height:0}}

/* Manual Lookup Lab */
/* Lookup Lab (restyled to site tokens) */
.lookup-lab .lab-intro p{max-width:78ch}
.lookup-lab #labStatus{font-size:.88rem;margin-top:6px}
.lookup-lab .lab-tabs{display:inline-flex;flex-wrap:wrap;gap:4px;margin-top:16px;padding:4px;background:var(--page);border:1px solid var(--line);border-radius:12px}
.lookup-lab .lab-tabs button{border:0;background:transparent;border-radius:9px;padding:9px 16px;cursor:pointer;font:inherit;font-weight:650;font-size:.92rem;color:var(--muted)}
.lookup-lab .lab-tabs button:hover{color:var(--navy)}
.lookup-lab .lab-tabs button[aria-selected="true"]{background:var(--surface);color:var(--navy);box-shadow:0 1px 4px rgba(19,43,70,.14)}
.lookup-lab .lab-tabs button:focus-visible{outline:2px solid var(--blue);outline-offset:2px}
.lookup-lab h4{margin:24px 0 10px;color:var(--navy);font-size:1.02rem}
.lookup-lab ul{padding-left:20px;margin:6px 0}.lookup-lab li{margin:4px 0;line-height:1.5}
.lookup-lab .lab-purpose{font-size:1.04rem;line-height:1.6;color:var(--ink);margin:16px 0 18px;padding:14px 16px;border-left:4px solid var(--blue);background:var(--blue-light);border-radius:0 12px 12px 0}
.lookup-lab .lab-tips{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:14px}
.lookup-lab .lab-tips>div{padding:14px 18px;border:1px solid var(--line);border-radius:14px}
.lookup-lab .lab-tips>div h4{margin-top:4px}
.lookup-lab .lab-tips>div:first-child{background:var(--green-bg)}.lookup-lab .lab-tips>div:first-child h4{color:var(--green)}
.lookup-lab .lab-tips>div:last-child{background:var(--amber-bg)}.lookup-lab .lab-tips>div:last-child h4{color:var(--amber)}
.lookup-lab .lab-chapters{display:grid;gap:8px}
.lookup-lab .lab-chapters details{border:1px solid var(--line);border-radius:12px;padding:0 14px;background:var(--surface)}
.lookup-lab .lab-chapters details[open]{box-shadow:var(--shadow)}
.lookup-lab .lab-chapters details>summary{background:none;border:0;margin:0;padding:12px 0;color:var(--navy);font-weight:650}
.lookup-lab .lab-chapters details>summary:hover{background:none;color:var(--blue)}
.lookup-lab .lab-chapters summary small{color:var(--muted);font-weight:500;margin-left:6px}
.lookup-lab .lab-chapters ul{padding-bottom:12px}.lookup-lab .lab-chapters li small{color:var(--muted)}
.lookup-lab .lab-check{border:1px solid var(--line);border-radius:12px;margin:10px 0;padding:12px 16px;background:var(--surface)}
.lookup-lab .lab-check legend{font-weight:650;color:var(--ink);padding:0 4px}
.lookup-lab .lab-check label{display:block;margin:6px 0;cursor:pointer}
.lookup-lab .lab-check-result.ok{color:var(--green);font-weight:650}.lookup-lab .lab-check-result.bad{color:var(--red);font-weight:650}
.lookup-lab .lab-meta{display:inline-flex;gap:8px;align-items:center;margin:16px 0 4px;padding:5px 12px;border-radius:999px;background:var(--blue-light);color:var(--blue);font-size:.86rem;font-weight:650}
.lookup-lab #drillPrompt{font-size:1.2rem;color:var(--ink);margin:10px 0 4px}
.lookup-lab .lab-steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;margin:16px 0;padding:16px;border:1px solid var(--line);border-radius:14px;background:var(--page)}
.lookup-lab .lab-steps .field>span:first-child{font-weight:650;color:var(--navy)}
.lookup-lab .lab-search{display:flex;gap:8px}.lookup-lab .lab-search input{flex:1;min-width:0}
.lookup-lab .lab-hits{columns:2 260px;padding-left:22px}.lookup-lab .lab-hits li{break-inside:avoid;margin:4px 0}
.lookup-lab .lab-hits small{color:var(--muted)}
.lookup-lab .lab-chosen{font-weight:700;color:var(--blue);text-decoration:underline}
.lookup-lab .lab-result{border-radius:12px;padding:14px 18px;margin-top:14px;border:1px solid var(--line);border-left-width:4px}
.lookup-lab .lab-result h3{margin:0 0 8px}
.lookup-lab .lab-result.ok{background:var(--green-bg);border-left-color:var(--green)}.lookup-lab .lab-result.ok h3{color:var(--green)}
.lookup-lab .lab-result.bad{background:var(--red-bg);border-left-color:var(--red)}.lookup-lab .lab-result.bad h3{color:var(--red)}
.lookup-lab [data-lab-panel="drills"] .formula-controls{max-width:420px}
@media (max-width:640px){.lookup-lab .lab-tabs{display:flex}.lookup-lab .lab-tabs button{flex:1;padding:9px 8px}.lookup-lab .lab-steps{padding:12px}}

/* Learn pathway (Phase 4 pilot) */
.learn-pathway .pathway-map{border:1px solid var(--border,rgba(127,127,127,.3));border-radius:12px;padding:12px 14px;margin:8px 0 14px;background:var(--surface,transparent)}
.learn-pathway .pathway-map-head{display:flex;gap:12px;align-items:center}
.learn-pathway .pathway-map-head small{display:block;color:var(--muted);margin-top:2px}
.learn-pathway .pathway-sp{display:inline-flex;align-items:center;justify-content:center;min-width:44px;height:44px;border-radius:10px;background:#0c2340;color:#fff;font-weight:700}
.learn-pathway .pathway-manuals{margin:10px 0 6px;font-size:.92rem}
.learn-pathway .pathway-steps{display:flex;flex-wrap:wrap;gap:6px 18px;margin:6px 0 0;padding-left:0;list-style:none;counter-reset:pw}.learn-pathway .pathway-steps li{counter-increment:pw}.learn-pathway .pathway-steps li::before{content:counter(pw) ". ";color:var(--muted)}
.learn-pathway .pathway-block{margin-top:18px;padding-top:14px;border-top:1px solid var(--border,rgba(127,127,127,.25))}
.learn-pathway .pathway-key{font-size:1.02rem;line-height:1.6;max-width:72ch}
.learn-pathway .pathway-cites ul{list-style:none;padding-left:0}.learn-pathway .pathway-cites li{margin:6px 0}
.learn-pathway .pathway-cites small{color:var(--muted)}
.learn-pathway .pathway-traps li{margin:4px 0}
.learn-pathway .pathway-locked:not(.is-open)>*:not(.pathway-lock-note){display:none}
.learn-pathway .pathway-lock-note{margin-top:14px;padding:12px;border:1px dashed var(--border,rgba(127,127,127,.4));border-radius:10px;color:var(--muted)}
.learn-pathway .lab-steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px;margin:10px 0}
.learn-pathway .lab-search{display:flex;gap:6px}.learn-pathway .lab-search input{flex:1;min-width:0}
.learn-pathway .lab-hits{columns:3 120px;padding-left:20px}.learn-pathway .lab-chosen{font-weight:700;text-decoration:underline}
.learn-pathway .lab-result{border-radius:8px;padding:10px 14px;margin-top:10px}.learn-pathway .lab-result.ok{background:rgba(18,122,58,.1)}.learn-pathway .lab-result.bad{background:rgba(180,35,24,.08)}
.learn-pathway .pathway-q{border:1px solid var(--border,rgba(127,127,127,.25));border-radius:10px;padding:10px 14px;margin:10px 0}
.learn-pathway .pathway-opt{display:block;margin:4px 0}
.learn-pathway .pathway-diff{font-size:.75rem;text-transform:uppercase;letter-spacing:.04em;color:var(--muted)}
.learn-pathway .pathway-deeper{margin-top:18px;border:1px solid var(--border,rgba(127,127,127,.25));border-radius:12px;padding:10px 14px}
.learn-pathway .pathway-deeper>summary{cursor:pointer}.learn-pathway .pathway-deeper>summary small{color:var(--muted);margin-left:6px}