:root {
  --navy: #173a5e;
  --navy-2: #0f2d4a;
  --teal: #16836f;
  --teal-dark: #0f6e5e;
  --teal-soft: #e8f6f2;
  --sky: #eef5fb;
  --ink: #182536;
  --muted: #64748b;
  --border: #d8e2ec;
  --surface: #ffffff;
  --danger: #b42318;
  --danger-soft: #fff1f0;
  --warning: #9a6700;
  --warning-soft: #fff7df;
  --success: #067647;
  --success-soft: #ecfdf3;
  --purple: #6941c6;
  --shadow: 0 14px 36px rgba(15, 45, 74, 0.08);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; background: #f4f7fa; color: var(--ink); line-height: 1.5; }
button, input, select { font: inherit; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: .55; }
.app-header { background: linear-gradient(135deg, var(--navy-2), var(--navy)); color: white; padding: 20px clamp(18px, 4vw, 60px); display: flex; align-items: center; justify-content: space-between; gap: 24px; position: sticky; top: 0; z-index: 30; box-shadow: 0 8px 24px rgba(15,45,74,.18); }
.app-header h1 { font-size: clamp(1.35rem, 2.5vw, 2rem); margin: 0; }
.eyebrow { margin: 0 0 4px; text-transform: uppercase; letter-spacing: .12em; font-size: .75rem; font-weight: 800; opacity: .78; }
nav { display: flex; gap: 8px; flex-wrap: wrap; }
.nav-button { border: 1px solid rgba(255,255,255,.25); background: rgba(255,255,255,.08); color: white; padding: 9px 13px; border-radius: 10px; }
.nav-button.active, .nav-button:hover { background: white; color: var(--navy); }
.app-shell { width: min(1320px, calc(100% - 28px)); margin: 28px auto 70px; }
.view { display: grid; gap: 22px; }
.hidden { display: none !important; }
.panel { background: var(--surface); border: 1px solid var(--border); border-radius: 18px; padding: clamp(18px, 3vw, 30px); box-shadow: var(--shadow); }
.centered { text-align: center; }
.spinner { width: 42px; height: 42px; border: 4px solid var(--border); border-top-color: var(--teal); border-radius: 50%; animation: spin 1s linear infinite; margin: 0 auto; }
@keyframes spin { to { transform: rotate(360deg); } }
.hero-grid { display: grid; grid-template-columns: 1.6fr 1fr; gap: 22px; }
.hero-panel { background: linear-gradient(135deg, #fff, #f2fbf8); }
.hero-panel h2, .results-hero h2 { font-size: clamp(1.8rem, 4vw, 3rem); margin: 5px 0 10px; line-height: 1.1; }
.hero-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 24px; }
.primary-button, .secondary-button, .danger-button, .danger-outline-button, .text-button, .flag-inline { border-radius: 11px; padding: 11px 16px; font-weight: 750; border: 1px solid transparent; }
.large-button { padding: 13px 22px; font-size: 1.02rem; }
.primary-button { background: var(--teal); color: white; }
.primary-button:hover { background: var(--teal-dark); }
.secondary-button { background: white; color: var(--navy); border-color: var(--border); }
.secondary-button:hover { background: var(--sky); }
.danger-button { background: var(--danger); color: white; }
.danger-outline-button { background: white; color: var(--danger); border-color: #f1b8b3; }
.text-button { background: transparent; color: var(--teal); padding: 5px 8px; }
.stats-panel { display: grid; gap: 12px; align-content: center; }
.stat { display: flex; justify-content: space-between; align-items: baseline; gap: 10px; border-bottom: 1px solid var(--border); padding-bottom: 9px; }
.stat strong { font-size: 1.55rem; color: var(--navy); }
.stat span { color: var(--muted); text-align: right; }
.coverage-track, .progress-track { background: #e8eef4; height: 10px; border-radius: 999px; overflow: hidden; }
.coverage-fill, .progress-fill { height: 100%; width: 0; background: linear-gradient(90deg, var(--teal), #2fb59b); transition: width .25s ease; }
.dashboard-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }
.section-heading { display: flex; justify-content: space-between; align-items: center; gap: 18px; margin-bottom: 18px; }
.section-heading h2 { margin: 0; }
.section-note { color: var(--muted); margin-top: -8px; }
.setting-row { display: grid; gap: 8px; padding: 14px 0; border-bottom: 1px solid var(--border); }
.inline-setting { grid-template-columns: 1fr auto; align-items: center; }
.setting-row > label, .setting-row > div > label { font-weight: 750; }
.setting-row small, .choice-card small, .category-row small { display: block; color: var(--muted); }
select, input[type="number"] { border: 1px solid var(--border); border-radius: 10px; padding: 10px; background: white; color: var(--ink); width: 100%; }
input[type="checkbox"] { width: 19px; height: 19px; accent-color: var(--teal); }
.input-with-note { display: grid; grid-template-columns: minmax(120px, 180px) 1fr; align-items: center; gap: 12px; }
.input-suffix { display: flex; align-items: center; gap: 8px; }
.input-suffix input { max-width: 180px; }
.input-suffix span { color: var(--muted); }
.choice-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.choice-card { display: flex; align-items: center; gap: 10px; border: 1px solid var(--border); padding: 12px; border-radius: 12px; background: #fff; }
.choice-card:has(input:checked) { border-color: var(--teal); background: var(--teal-soft); }
.choice-card.disabled { opacity: .55; }
.inline-message { margin-top: 16px; padding: 12px 14px; border-radius: 11px; background: var(--danger-soft); border: 1px solid #f2b8b5; color: var(--danger); font-weight: 700; }
.weight-toolbar { display: flex; align-items: center; gap: 8px; justify-content: flex-end; margin: 4px 0 10px; flex-wrap: wrap; }
.weight-total { font-weight: 850; color: var(--success); background: var(--success-soft); border-radius: 999px; padding: 5px 10px; }
.weight-total.invalid { color: var(--danger); background: var(--danger-soft); }
.category-list { display: grid; gap: 7px; }
.category-row { display: grid; grid-template-columns: minmax(0,1fr) 110px; align-items: center; gap: 12px; padding: 9px 0; border-bottom: 1px solid var(--border); }
.category-row.category-off { opacity: .58; }
.category-check { display: flex; align-items: center; gap: 10px; }
.percent-control { display: grid; grid-template-columns: 1fr auto; gap: 5px; align-items: center; }
.percent-control input { padding: 8px; text-align: right; }
.random-row { margin-top: 7px; background: var(--sky); padding: 10px 12px; border-radius: 12px; border: 0; }
.subcategory-groups { display: grid; gap: 13px; }
.subcategory-group { border: 1px solid var(--border); border-radius: 13px; padding: 12px; }
.subcategory-group summary { cursor: pointer; display: flex; justify-content: space-between; gap: 12px; }
.subcategory-group summary span { color: var(--muted); font-size: .85rem; }
.subcategory-chip-grid { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.subcategory-chip { display: flex; align-items: center; gap: 7px; background: #f8fafc; border: 1px solid var(--border); border-radius: 999px; padding: 7px 10px; }
.subcategory-chip:has(input:checked) { background: var(--teal-soft); border-color: #a7dace; }
.subcategory-chip small { color: var(--muted); }
.test-toolbar { position: sticky; top: 105px; z-index: 20; display: grid; gap: 12px; }
.progress-meta { display: flex; justify-content: space-between; gap: 12px; }
.test-actions { display: flex; gap: 10px; justify-content: flex-end; align-items: center; flex-wrap: wrap; }
.timer { font-variant-numeric: tabular-nums; font-weight: 850; color: var(--navy); background: var(--sky); padding: 9px 12px; border-radius: 10px; }
.mode-badge { padding: 7px 10px; border-radius: 999px; font-weight: 800; font-size: .82rem; }
.mode-badge.study { background: var(--teal-soft); color: var(--success); }
.mode-badge.exam { background: #f2edff; color: var(--purple); }
.freshness-banner { background: var(--teal-soft); border: 1px solid #b9e3d8; color: #075c4d; padding: 12px 14px; border-radius: 12px; }
.question-card { background: white; border: 1px solid var(--border); border-radius: 18px; padding: clamp(18px, 3vw, 32px); box-shadow: var(--shadow); margin-bottom: 18px; }
.question-card.flagged { border-color: #d7a300; box-shadow: 0 0 0 3px rgba(224,168,0,.11); }
.question-header { display: flex; justify-content: space-between; gap: 14px; margin-bottom: 18px; }
.pill-row { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 4px; }
.category-pill, .subcategory-pill, .bank-pill { padding: 5px 9px; border-radius: 999px; font-size: .76rem; font-weight: 800; }
.category-pill { background: var(--sky); color: var(--navy); }
.subcategory-pill { background: var(--teal-soft); color: var(--success); }
.bank-pill { background: #f2edff; color: var(--purple); }
.source-line { color: var(--muted); font-size: .8rem; }
.question-text { font-size: clamp(1.08rem, 2vw, 1.35rem); font-weight: 700; white-space: pre-line; }
.visual-label { margin: 18px auto 6px; width: min(100%, 1000px); background: var(--warning-soft); color: var(--warning); font-weight: 750; padding: 8px 11px; border-radius: 9px; }
.question-media { display: block; width: min(100%, 1000px); margin: 8px auto 18px; border: 1px solid var(--border); border-radius: 12px; background: #f8fafc; }
.options-list { display: grid; gap: 12px; margin-top: 20px; }
.option-button { display: grid; grid-template-columns: 38px 1fr; align-items: center; gap: 12px; width: 100%; text-align: left; padding: 14px; background: white; border: 1px solid var(--border); border-radius: 13px; color: var(--ink); }
.option-button:hover { border-color: var(--teal); background: #f7fcfa; }
.option-button.selected { border-color: var(--teal); background: var(--teal-soft); box-shadow: 0 0 0 2px rgba(22,131,111,.12); }
.option-button.correct-choice { border-color: var(--success); background: var(--success-soft); }
.option-button.wrong-choice { border-color: var(--danger); background: var(--danger-soft); }
.option-label { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 9px; background: var(--sky); color: var(--navy); font-weight: 850; }
.study-feedback { margin-top: 18px; border-radius: 13px; padding: 15px; display: grid; gap: 10px; border: 1px solid var(--border); }
.study-feedback.correct { background: var(--success-soft); border-color: #a6dfc4; }
.study-feedback.incorrect { background: var(--danger-soft); border-color: #efb2ad; }
.explanation { white-space: pre-line; background: rgba(255,255,255,.72); padding: 13px; border-radius: 10px; border: 1px solid var(--border); }
.source-slide { margin-top: 16px; border-top: 1px solid var(--border); padding-top: 12px; }
.source-slide summary { cursor: pointer; color: var(--navy); font-weight: 750; }
.source-slide img { display: block; width: min(100%, 1000px); margin: 10px auto 0; border: 1px solid var(--border); border-radius: 10px; }
.question-footer { display: flex; justify-content: space-between; gap: 12px; margin-top: 20px; color: var(--muted); font-size: .86rem; align-items: center; }
.flag-inline { padding: 7px 10px; background: white; color: var(--warning); border-color: #ead18b; }
.flag-inline.active, .flag-button-active { background: var(--warning-soft); border-color: #d7a300; color: var(--warning); }
.single-navigation { display: grid; grid-template-columns: auto 1fr auto; gap: 14px; align-items: center; }
.question-dots { display: flex; gap: 5px; overflow-x: auto; padding: 5px; }
.question-dot { flex: 0 0 auto; width: 28px; height: 28px; border-radius: 8px; border: 1px solid var(--border); background: white; font-size: .72rem; }
.question-dot.answered { background: var(--teal-soft); border-color: var(--teal); }
.question-dot.flagged { box-shadow: inset 0 -4px #e0a800; }
.question-dot.current { background: var(--navy); color: white; }
.results-hero { background: linear-gradient(135deg, #fff, var(--teal-soft)); }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 12px 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--muted); font-size: .78rem; text-transform: uppercase; letter-spacing: .06em; }
.score-bar { min-width: 120px; background: #e9eef3; height: 9px; border-radius: 999px; overflow: hidden; margin-top: 5px; }
.score-bar > span { display: block; height: 100%; background: var(--teal); }
.review-list { display: grid; gap: 16px; }
.review-item { border: 1px solid var(--border); border-left: 5px solid var(--success); border-radius: 13px; padding: 18px; }
.review-item.incorrect { border-left-color: var(--danger); }
.review-item.unanswered { border-left-color: var(--warning); }
.review-item summary { cursor: pointer; font-weight: 800; }
.answer-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 12px; margin: 15px 0; }
.answer-box { background: var(--sky); padding: 12px; border-radius: 10px; }
.empty-state { color: var(--muted); padding: 30px; text-align: center; border: 1px dashed var(--border); border-radius: 12px; }
.audit-summary { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 12px; margin-bottom: 16px; }
.audit-stat { background: var(--sky); padding: 14px; border-radius: 12px; }
.audit-stat strong { display: block; font-size: 1.5rem; color: var(--navy); }
.audit-stat span { color: var(--muted); font-size: .87rem; }
.audit-item { padding: 14px 0; border-bottom: 1px solid var(--border); }
.audit-item code { background: var(--sky); padding: 3px 6px; border-radius: 6px; }
.status-good { color: var(--success); font-weight: 750; }
.status-warning { color: var(--warning); font-weight: 750; }
.history-card { border: 1px solid var(--border); border-radius: 13px; padding: 16px; margin-bottom: 12px; }
.history-card > div { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.history-meta { color: var(--muted); font-size: .86rem; }
dialog { border: none; border-radius: 16px; padding: 0; box-shadow: 0 20px 60px rgba(0,0,0,.24); }
dialog::backdrop { background: rgba(15,45,74,.55); }
.dialog-card { padding: 26px; min-width: min(420px, 90vw); }
.dialog-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 22px; }
@media (max-width: 900px) {
  .app-header { position: static; align-items: flex-start; flex-direction: column; }
  .hero-grid, .dashboard-grid { grid-template-columns: 1fr; }
  .test-toolbar { top: 8px; }
  .single-navigation { grid-template-columns: 1fr 1fr; }
  .question-dots { grid-column: 1 / -1; grid-row: 2; }
  .answer-grid, .audit-summary { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .app-shell { width: min(100% - 16px, 1320px); margin-top: 12px; }
  .panel { border-radius: 14px; padding: 16px; }
  .choice-grid { grid-template-columns: 1fr; }
  .input-with-note { grid-template-columns: 1fr; }
  .category-row { grid-template-columns: minmax(0,1fr) 86px; }
  .test-actions { justify-content: flex-start; }
  .question-header { align-items: flex-start; }
  .question-text { font-size: 1.04rem; }
  .option-button { padding: 11px; grid-template-columns: 34px 1fr; }
}
@media print {
  .app-header, .test-actions, .hero-actions, nav { display: none !important; }
  body { background: white; }
  .panel, .question-card { box-shadow: none; break-inside: avoid; }
}

/* Isolated question visuals: show only the clinical/diagnostic image, never a screenshot of the full question slide. */
.question-visuals { display: grid; gap: 12px; align-items: start; margin: 8px 0 18px; }
.question-visuals.single { grid-template-columns: minmax(0, 1fr); }
.question-visuals.multiple { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.question-visuals .question-media { margin: 0 auto; width: auto; max-width: 100%; max-height: 560px; object-fit: contain; }

/* Interactive audit editor */
.audit-summary { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
.audit-toolbar { display: grid; grid-template-columns: minmax(220px, 2fr) repeat(3, minmax(150px, 1fr)) auto auto; gap: 10px; align-items: center; margin: 16px 0 18px; }
.audit-toolbar input, .audit-toolbar select { width: 100%; }
.audit-editor { display: grid; gap: 16px; }
.audit-editor-head { display: flex; justify-content: space-between; gap: 18px; align-items: flex-start; padding: 14px; background: var(--sky); border-radius: 12px; }
.audit-editor-head code { display: inline-block; margin-bottom: 8px; font-weight: 750; }
.audit-status-pill { padding: 5px 9px; border-radius: 999px; font-size: .76rem; font-weight: 800; }
.audit-status-pill.unreviewed { background: #f2f4f7; color: var(--muted); }
.audit-status-pill.edited { background: var(--warning-soft); color: var(--warning); }
.audit-status-pill.reviewed { background: var(--success-soft); color: var(--success); }
.audit-form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.audit-form-grid label, .audit-field { display: grid; gap: 7px; font-weight: 750; }
.audit-form-grid label > span, .audit-field > span, .audit-field-heading > span { color: var(--navy); }
.audit-field-heading { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.audit-editor textarea { width: 100%; resize: vertical; line-height: 1.45; }
.audit-options-editor { display: grid; gap: 8px; }
.audit-option-row { display: grid; grid-template-columns: 64px minmax(0, 1fr) auto; gap: 8px; align-items: center; }
.audit-option-label { text-align: center; font-weight: 850; }
.audit-picture-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.audit-picture-grid > section { border: 1px solid var(--border); border-radius: 13px; padding: 13px; background: #fbfcfd; min-width: 0; }
.audit-picture-grid h3 { margin: 0 0 4px; color: var(--navy); font-size: 1rem; }
.audit-picture-grid p { margin: 0 0 10px; color: var(--muted); font-size: .82rem; }
.audit-media-grid { display: grid; gap: 10px; }
.audit-media-card { border: 1px solid var(--border); border-radius: 10px; padding: 8px; background: white; min-width: 0; }
.audit-media-card img { display: block; width: 100%; max-height: 250px; object-fit: contain; background: #f8fafc; border-radius: 8px; }
.audit-media-card small { display: block; margin: 6px 0; color: var(--muted); overflow-wrap: anywhere; }
.audit-media-actions { display: flex; flex-wrap: wrap; gap: 7px; }
.audit-media-actions .text-button { padding: 5px 7px; font-size: .78rem; }
.danger-text { color: var(--danger) !important; }
.audit-editor-actions, .audit-export-actions { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-top: 4px; }
.file-button { display: inline-flex; align-items: center; justify-content: center; cursor: pointer; }
.visually-hidden { 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; }
.empty-state.compact { padding: 14px; font-size: .84rem; }
.explanation-side-visuals { margin-top: 10px; }

@media (max-width: 1100px) {
  .audit-toolbar { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .audit-picture-grid { grid-template-columns: 1fr; }
}
@media (max-width: 700px) {
  .audit-toolbar, .audit-form-grid { grid-template-columns: 1fr; }
  .audit-editor-head { flex-direction: column; }
  .audit-option-row { grid-template-columns: 52px minmax(0, 1fr); }
  .audit-option-row .audit-remove-option { grid-column: 2; justify-self: start; }
}
\n\n/* Original source option order: keeps explanation letters meaningful after quiz randomization. */\n.original-choices-block {\n  margin-top: 14px;\n  border: 1px solid #cbd5e1;\n  border-radius: 12px;\n  background: #f8fafc;\n  padding: 12px 14px;\n}\n.original-choices-title {\n  font-weight: 800;\n  color: #0f172a;\n  margin-bottom: 4px;\n}\n.original-choices-note {\n  font-size: 0.9rem;\n  color: #475569;\n  margin-bottom: 9px;\n}\n.original-choice-row {\n  display: grid;\n  grid-template-columns: 28px minmax(0, 1fr) auto;\n  gap: 7px;\n  align-items: start;\n  padding: 5px 7px;\n  border-radius: 7px;\n}\n.original-choice-row + .original-choice-row { margin-top: 2px; }\n.original-choice-label { font-weight: 800; color: #334155; }\n.original-choice-correct { background: #ecfdf5; }\n.original-choice-key {\n  font-size: 0.76rem;\n  font-weight: 800;\n  color: #047857;\n  border: 1px solid #a7f3d0;\n  background: #d1fae5;\n  border-radius: 999px;\n  padding: 2px 7px;\n}\n