:root {
  --ink: #172434;
  --navy: #18324b;
  --navy-2: #244e70;
  --paper: #f7f4ed;
  --surface: #ffffff;
  --line: #d8d4ca;
  --muted: #607080;
  --burgundy: #a8293b;
  --gold: #c49a4a;
  --success: #276749;
  --danger: #8f2736;
  --shadow: 0 18px 44px rgba(17, 34, 50, .10);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font: 1rem/1.65 "Segoe UI", Arial, sans-serif; }
button, input { font: inherit; }
button { cursor: pointer; }
.skip-link { position: fixed; left: 1rem; top: -5rem; z-index: 99; padding: .75rem 1rem; background: #fff; color: var(--navy); }
.skip-link:focus { top: 1rem; }
.topbar { height: 76px; display: flex; align-items: center; justify-content: space-between; padding: 0 2rem; color: #fff; background: var(--navy); border-bottom: 4px solid var(--gold); }
.brand { display: flex; align-items: center; gap: .8rem; }
.brand-mark { display: grid; place-items: center; width: 42px; height: 42px; border: 1px solid rgba(255,255,255,.55); font-weight: 800; letter-spacing: .06em; }
.brand strong, .brand small { display: block; }
.brand small { color: #cad7e2; font-size: .78rem; }
.menu-button { display: none; border: 1px solid rgba(255,255,255,.5); background: transparent; color: #fff; padding: .5rem .8rem; border-radius: 4px; }
.course-shell { min-height: calc(100vh - 76px); display: grid; grid-template-columns: 290px 1fr; }
.course-nav { padding: 1.5rem 1rem; background: #10283e; color: #fff; }
.progress-card { padding: 1rem; margin-bottom: 1.25rem; background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.12); }
.progress-label { display: flex; justify-content: space-between; font-size: .9rem; }
.progress-track { height: 7px; margin-top: .65rem; background: rgba(255,255,255,.15); overflow: hidden; }
.progress-track span { display: block; width: 0; height: 100%; background: var(--gold); transition: width .25s ease; }
.course-nav nav { display: grid; gap: .35rem; }
.nav-item { display: grid; grid-template-columns: 2rem 1fr; gap: .5rem; width: 100%; padding: .8rem; border: 0; border-left: 3px solid transparent; color: #d9e4ec; background: transparent; text-align: left; }
.nav-item span { color: #92a8b9; font-size: .8rem; font-weight: 800; }
.nav-item:hover, .nav-item:focus-visible { background: rgba(255,255,255,.08); }
.nav-item.active { border-left-color: var(--gold); color: #fff; background: rgba(255,255,255,.1); }
.nav-item.complete span { color: #f0cf85; }
main { width: min(1050px, 100%); margin: 0 auto; padding: clamp(2rem, 5vw, 5rem); }
.course-section { display: none; animation: enter .3s ease both; }
.course-section.active { display: block; }
@keyframes enter { from { opacity: 0; transform: translateY(8px); } }
.eyebrow, .module-kicker { color: var(--burgundy); font-size: .78rem; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
h1 { max-width: 820px; margin: .55rem 0 1.15rem; font: 700 clamp(2.35rem, 6vw, 4.9rem)/.98 Georgia, serif; letter-spacing: -.035em; color: var(--navy); }
h1 em { color: var(--burgundy); font-weight: 400; }
h2 { margin-top: 0; color: var(--navy); font: 700 1.25rem/1.3 Georgia, serif; }
.lead { max-width: 780px; color: #42576a; font-size: 1.22rem; }
.objective-grid, .compare-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin: 2rem 0; }
.objective-grid article, .compare-grid article, .knowledge-check { padding: 1.35rem; background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow); }
.objective-grid article span { color: var(--burgundy); font-weight: 900; }
.objective-grid p, .compare-grid p { margin-bottom: 0; }
.compare-grid { grid-template-columns: 1fr 1fr; }
.compare-grid article { border-top: 4px solid var(--success); }
.compare-grid .no-card { border-top-color: var(--gold); }
.compare-grid li + li { margin-top: .55rem; }
.callout { margin: 2rem 0; padding: 1.1rem 1.25rem; border-left: 4px solid var(--burgundy); background: #f0e7e6; }
.callout p { margin: .25rem 0 0; }
.definition-card { position: relative; margin: 2rem 0; padding: 1.6rem 1.8rem; background: var(--navy); color: #fff; box-shadow: var(--shadow); }
.definition-card p { margin: 0; padding-right: 5rem; font: 1.25rem/1.55 Georgia, serif; }
.stamp { position: absolute; right: 1rem; top: 1rem; border: 2px solid #e3c47f; color: #e3c47f; padding: .2rem .4rem; transform: rotate(3deg); font-size: .7rem; font-weight: 900; letter-spacing: .12em; }
.knowledge-check { margin: 2rem 0; }
.knowledge-check legend { padding: 0 .5rem; color: var(--burgundy); font-weight: 800; }
.knowledge-check label { display: block; padding: .7rem .85rem; margin: .55rem 0; background: #f5f7f8; border: 1px solid #dfe5e9; }
.knowledge-check input { margin-right: .55rem; }
.feedback { min-height: 1.6rem; margin-top: .8rem; font-weight: 700; }
.feedback.correct { color: var(--success); }
.feedback.incorrect { color: var(--danger); }
.primary-button, .secondary-button, .text-button { min-height: 46px; padding: .7rem 1.15rem; border-radius: 3px; font-weight: 800; }
.primary-button { border: 1px solid var(--navy); background: var(--navy); color: #fff; }
.primary-button:hover, .primary-button:focus-visible { background: var(--navy-2); }
.secondary-button { margin-top: .8rem; border: 1px solid var(--navy); background: #fff; color: var(--navy); }
.text-button { border: 0; background: transparent; color: var(--navy); text-decoration: underline; }
.section-actions { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-top: 2rem; }
.source-strip { margin-top: 1.5rem; padding: .75rem 1rem; color: #536373; background: #ebe7de; border: 1px solid var(--line); font-size: .88rem; }
.process-list { list-style: none; padding: 0; margin: 2rem 0; counter-reset: process; }
.process-list li { position: relative; display: grid; grid-template-columns: 58px 1fr; gap: 1rem; padding: 0 0 1.6rem; }
.process-list li:not(:last-child)::before { content: ""; position: absolute; left: 28px; top: 54px; bottom: 0; width: 1px; background: #bdc6cd; }
.process-list li > span { display: grid; place-items: center; width: 56px; height: 56px; background: var(--navy); color: #fff; border: 4px solid #d9c9a4; border-radius: 50%; font: 700 1rem Georgia, serif; }
.process-list h2 { margin: .15rem 0 .2rem; }
.process-list p { max-width: 760px; margin: 0; color: #516476; }
.safety-note { background: #fff3d8; border-left-color: var(--gold); }
.evidence-board { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin: 2rem 0; background: var(--navy); border: 1px solid var(--navy); box-shadow: var(--shadow); }
.board-title { grid-column: 1 / -1; padding: .8rem 1.1rem; color: #fff; background: var(--navy); font-weight: 800; letter-spacing: .05em; }
.evidence-board article { padding: 1.25rem; background: #fff; }
.evidence-board article > span { color: var(--burgundy); font-size: .75rem; font-weight: 900; letter-spacing: .1em; }
.evidence-board h2 { margin: .45rem 0 .2rem; }
.evidence-board p { margin: 0; color: #536576; }
.do-dont-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin: 2rem 0; }
.do-dont-grid article { padding: 1.35rem; background: #edf6f1; border-left: 4px solid var(--success); }
.do-dont-grid article:last-child { background: #f7e9e9; border-left-color: var(--danger); }
.do-dont-grid p { margin-bottom: 0; font-family: Georgia, serif; font-size: 1.05rem; }
.writing-formula { display: flex; flex-wrap: wrap; align-items: center; gap: .65rem; margin: 2rem 0; padding: 1rem; background: var(--navy); color: #fff; }
.writing-formula span { padding: .55rem .75rem; background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.2); }
.writing-formula b { color: #e3c47f; }
.act-example { margin: 2rem 0; padding: clamp(1.25rem, 4vw, 2.25rem); background: #fff; border: 1px solid #cfc9bc; box-shadow: var(--shadow); font-family: Georgia, serif; }
.act-header { display: flex; justify-content: space-between; gap: 1rem; padding-bottom: .8rem; border-bottom: 2px solid var(--navy); color: var(--navy); }
.act-header span { color: var(--burgundy); font: 800 .75rem "Segoe UI", Arial, sans-serif; letter-spacing: .1em; text-transform: uppercase; }
.act-example mark { padding: 0 .15rem; background: #f8e9b7; color: inherit; }
.checklist-card { margin: 2rem 0; padding: 1.5rem; background: #f0eee8; border: 1px solid var(--line); }
.checklist-card label { display: block; padding: .45rem 0; }
.case-card { position: relative; margin: 1.25rem 0; padding: 1.5rem; background: #fff; border: 1px solid var(--line); box-shadow: 0 10px 30px rgba(17,34,50,.07); }
.case-number { display: inline-block; margin-bottom: .7rem; padding: .2rem .5rem; color: var(--burgundy); border: 1px solid var(--burgundy); font-size: .74rem; font-weight: 900; letter-spacing: .08em; text-transform: uppercase; }
.case-card label { display: block; padding: .65rem .75rem; margin: .5rem 0; background: #f5f7f8; border: 1px solid #dfe5e9; }
.case-card.solved { border-left: 5px solid var(--success); }
.case-summary { position: sticky; bottom: 1rem; width: fit-content; margin: 1.5rem 0 1.5rem auto; padding: .6rem .9rem; color: #fff; background: var(--navy); box-shadow: var(--shadow); font-weight: 800; }
.final-quiz { display: grid; gap: 1rem; margin: 2rem 0; }
.final-quiz fieldset { padding: 1.2rem; background: #fff; border: 1px solid var(--line); }
.final-quiz fieldset.missing { border: 2px solid var(--danger); }
.final-quiz legend { padding: 0 .4rem; color: var(--navy); font-weight: 800; }
.final-quiz label { display: block; padding: .45rem .6rem; margin: .35rem 0; background: #f6f7f8; }
.quiz-result { margin: 1.5rem 0; padding: 1.4rem; border-left: 5px solid var(--navy); background: #edf3f7; }
.quiz-result.passed { border-left-color: var(--success); background: #e8f4ed; }
.quiz-result.not-passed { border-left-color: var(--danger); background: #f8e8e8; }
.quiz-score { display: block; color: var(--navy); font: 700 2rem Georgia, serif; }
.takeaway-list { list-style: none; padding: 0; margin: 2rem 0; }
.takeaway-list li { display: grid; grid-template-columns: 160px 1fr; gap: 1rem; padding: 1rem 0; border-bottom: 1px solid var(--line); }
.takeaway-list strong { color: var(--burgundy); font: 700 1.15rem Georgia, serif; }
.survey-panel { display: grid; grid-template-columns: 64px 1fr auto; align-items: center; gap: 1rem; padding: 1.5rem; margin: 2rem 0; color: #fff; background: var(--navy); box-shadow: var(--shadow); }
.survey-icon { display: grid; place-items: center; width: 56px; height: 56px; color: var(--navy); background: #e3c47f; border-radius: 50%; font-size: 1.5rem; font-weight: 900; }
.survey-panel h2 { margin: 0; color: #fff; }
.survey-panel p { margin: .2rem 0 0; color: #d7e1e9; }
.survey-panel .primary-button { display: inline-flex; align-items: center; justify-content: center; text-decoration: none; background: #fff; color: var(--navy); }
.survey-panel .primary-button.disabled { opacity: .55; cursor: not-allowed; }
.survey-status { grid-column: 2 / -1; font-size: .85rem; }
.sources-panel { margin: 2rem 0; padding: 1rem 1.2rem; background: #fff; border: 1px solid var(--line); }
.sources-panel summary { color: var(--navy); font-weight: 800; cursor: pointer; }
.sources-panel a { color: var(--navy-2); }
.sources-panel code { padding: .1rem .25rem; background: #efefef; }
button:focus-visible, a:focus-visible, input:focus-visible { outline: 3px solid #f4c95d; outline-offset: 3px; }
@media (max-width: 820px) {
  .topbar { padding: 0 1rem; }
  .menu-button { display: block; }
  .course-shell { display: block; }
  .course-nav { display: none; position: fixed; inset: 76px 0 0; z-index: 20; overflow: auto; }
  .course-nav.open { display: block; }
  main { padding: 2rem 1.15rem 4rem; }
  .objective-grid, .compare-grid { grid-template-columns: 1fr; }
  .evidence-board, .do-dont-grid { grid-template-columns: 1fr; }
  .board-title { grid-column: 1; }
  .writing-formula { display: grid; grid-template-columns: 1fr; text-align: center; }
  .survey-panel { grid-template-columns: 56px 1fr; }
  .survey-panel .primary-button, .survey-status { grid-column: 1 / -1; }
  .takeaway-list li { grid-template-columns: 1fr; gap: .2rem; }
  h1 { font-size: clamp(2.25rem, 13vw, 3.7rem); }
}
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; animation: none !important; transition: none !important; } }