:root {
  --canvas: #080b0d;
  --surface: #101618;
  --surface-2: #151d20;
  --surface-3: #1a2327;
  --line: #252f33;
  --line-strong: #3a484e;
  --text: #f1f4f5;
  --muted: #a3adb1;
  --subtle: #8a969b;
  --accent: #8eb7ff;
  --accent-soft: #c6d9ff;
  --warm: #f0b49f;
  --success: #74d3a8;
  --error: #ff938e;
  --content: 1220px;
  color-scheme: dark;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Helvetica Neue", Arial, sans-serif;
}
* { box-sizing: border-box; }
html { background: var(--canvas); scroll-padding-top: 124px; }
body { margin: 0; min-width: 320px; background: var(--canvas); color: var(--text); font-size: 17px; line-height: 1.68; -webkit-font-smoothing: antialiased; }
img, video { display: block; max-width: 100%; }
a { color: inherit; }
button { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
[hidden] { display: none !important; }
.skip-link { position: fixed; z-index: 200; top: 12px; left: 12px; transform: translateY(-180%); padding: 10px 14px; border-radius: 8px; background: var(--text); color: var(--canvas); }
.skip-link:focus { transform: translateY(0); }
.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; }

.course-header { position: sticky; z-index: 50; top: 0; border-bottom: 1px solid var(--line); background: rgba(8, 11, 13, .94); backdrop-filter: blur(18px); }
.header-shell { width: min(var(--content), calc(100% - 44px)); min-height: 68px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; font-size: 14px; font-weight: 760; }
.brand-mark { width: 31px; height: 31px; display: grid; place-items: center; border: 1px solid var(--line-strong); border-radius: 9px; background: var(--surface-2); color: var(--accent-soft); font-size: 12px; letter-spacing: -.04em; }
.header-shell nav { display: flex; align-items: center; gap: 8px; }
.header-shell nav a { min-height: 38px; padding: 7px 11px; display: inline-flex; align-items: center; border: 1px solid transparent; border-radius: 9px; color: var(--muted); text-decoration: none; font-size: 13px; }
.header-shell nav a:hover { border-color: var(--line); background: var(--surface); color: var(--text); }

.philosophy-hero { width: min(1440px, calc(100% - 44px)); margin: 0 auto; padding: 72px 0 64px; display: grid; grid-template-columns: minmax(0, .92fr) minmax(420px, 1.08fr); align-items: center; gap: clamp(42px, 7vw, 110px); }
.eyebrow, .module-kicker, .panel-label, .video-label { margin: 0 0 13px; color: var(--subtle); font-size: 11px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
h1, h2, h3, h4, p { overflow-wrap: anywhere; }
h1 { max-width: 760px; margin: 0; font-size: clamp(50px, 7.2vw, 100px); line-height: .91; letter-spacing: -.07em; }
h1 span { color: #858d91; font-weight: 440; }
.hero-lead { max-width: 720px; margin: 28px 0 0; color: var(--muted); font-size: clamp(18px, 2vw, 23px); line-height: 1.48; }
.hero-actions { margin-top: 32px; display: flex; flex-wrap: wrap; gap: 10px; }
.primary-button, .secondary-button { min-height: 46px; padding: 11px 16px; display: inline-flex; align-items: center; justify-content: center; border: 1px solid var(--accent); border-radius: 10px; background: var(--accent); color: #07111f; text-decoration: none; font-size: 14px; font-weight: 780; }
.secondary-button { border-color: var(--line-strong); background: transparent; color: var(--text); }
.hero-meta { margin: 40px 0 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px; }
.hero-meta div { min-width: 0; padding-top: 13px; border-top: 1px solid var(--line); }
.hero-meta dt { color: var(--subtle); font-size: 10px; font-weight: 750; letter-spacing: .1em; text-transform: uppercase; }
.hero-meta dd { margin: 5px 0 0; color: #d8dddf; font-size: 12px; }
.hero-art { position: relative; margin: 0; overflow: hidden; aspect-ratio: 4 / 4.4; border: 1px solid var(--line); border-radius: 22px; background: var(--surface); }
.hero-art img { width: 100%; height: 100%; object-fit: cover; }
.progress-shell { margin-top: 28px; padding: 16px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); }
.progress-copy { display: flex; justify-content: space-between; gap: 16px; color: var(--muted); font-size: 12px; }
.progress-copy strong { color: #d7dcde; }
.progress-track { height: 5px; margin-top: 11px; overflow: hidden; border-radius: 999px; background: #283236; }
.progress-track span { display: block; width: 0; height: 100%; border-radius: inherit; background: var(--accent); transition: width 300ms ease; }

.course-nav { position: sticky; z-index: 40; top: 68px; overflow-x: auto; border-block: 1px solid var(--line); background: rgba(10, 14, 16, .96); scrollbar-width: thin; }
.course-nav > div { width: max-content; min-width: 100%; padding: 0 max(22px, calc((100% - var(--content)) / 2)); display: flex; }
.course-nav a { min-height: 54px; padding: 0 15px; display: inline-flex; align-items: center; gap: 8px; border-bottom: 2px solid transparent; color: var(--subtle); text-decoration: none; white-space: nowrap; font-size: 12px; }
.course-nav a span { color: #8a969b; font-size: 11px; font-variant-numeric: tabular-nums; }
.course-nav a:hover, .course-nav a.is-active { border-bottom-color: var(--accent); color: var(--text); }
.course-nav a.is-active span { color: var(--accent); }

.course-map { width: min(var(--content), calc(100% - 44px)); margin: 0 auto; padding: 104px 0; }
.course-map > div:first-child { display: grid; grid-template-columns: 1.08fr .92fr; align-items: end; gap: 60px; }
.course-map h2, .sources-section h2 { margin: 0; font-size: clamp(46px, 6vw, 78px); line-height: .98; letter-spacing: -.06em; }
.course-map > div:first-child > p:last-child { margin: 0; color: var(--muted); font-size: 18px; }
.phase-grid { margin-top: 54px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.phase-grid article { min-height: 210px; padding: 22px; border: 1px solid var(--line); border-radius: 14px; background: var(--surface); }
.phase-grid span { color: var(--accent); font-size: 11px; font-weight: 800; }
.phase-grid h3 { margin: 64px 0 6px; font-size: 22px; letter-spacing: -.03em; }
.phase-grid p { margin: 0; color: var(--muted); font-size: 14px; }
.study-note { margin-top: 18px; padding: 20px 22px; display: grid; grid-template-columns: 180px 1fr; gap: 24px; border-left: 3px solid var(--accent); background: var(--surface); }
.study-note p { margin: 0; color: var(--muted); }

.philosophy-module { scroll-margin-top: 124px; padding: 110px 0; border-top: 1px solid var(--line); }
.philosophy-module:nth-of-type(even) { background: #0b0f11; }
.module-shell { width: min(var(--content), calc(100% - 44px)); margin: 0 auto; }
.module-header { display: grid; grid-template-columns: 76px minmax(0, 1fr) minmax(290px, .7fr); align-items: start; gap: 34px; }
.module-index { color: #8a969b; font-size: 15px; font-weight: 800; font-variant-numeric: tabular-nums; }
.module-header h2 { max-width: 760px; margin: 0; font-size: clamp(44px, 5.7vw, 76px); line-height: .95; letter-spacing: -.06em; }
.module-lead { max-width: 790px; margin: 22px 0 0; color: var(--muted); font-size: clamp(18px, 2vw, 22px); }
.outcomes { margin: 0; padding: 0; display: grid; gap: 10px; list-style: none; }
.outcomes li { padding: 13px 0; display: grid; grid-template-columns: 82px 1fr; gap: 12px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
.outcomes strong { color: var(--accent-soft); }
.module-visual { margin: 54px 0 0; overflow: hidden; aspect-ratio: 16 / 7.7; border: 1px solid var(--line); border-radius: 18px; background: var(--surface); }
.module-visual img { width: 100%; height: 100%; object-fit: cover; }
.lesson-layout { margin-top: 70px; display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(300px, .72fr); align-items: start; gap: clamp(42px, 7vw, 90px); }
.lesson-prose { min-width: 0; max-width: 760px; }
.lesson-prose h3 { margin: 0 0 18px; font-size: clamp(28px, 3vw, 39px); line-height: 1.08; letter-spacing: -.04em; }
.lesson-prose h3:not(:first-child) { margin-top: 56px; }
.lesson-prose h4 { margin: 44px 0 12px; font-size: 20px; line-height: 1.25; letter-spacing: -.025em; }
.lesson-prose p { margin: 0 0 22px; color: #c2c9cc; }
.lesson-prose ol, .lesson-prose ul { margin: 18px 0 28px; padding-left: 24px; color: #c2c9cc; }
.lesson-prose li { margin: 9px 0; padding-left: 6px; }
.lesson-prose strong { color: #f2f4f5; }
.citations { display: inline-flex; gap: 4px; margin-left: 4px; vertical-align: .08em; }
.citations a { padding: 1px 5px; border: 1px solid #3a4b52; border-radius: 5px; color: var(--accent-soft); text-decoration: none; font-size: 9px; font-weight: 800; }
.concept-list { margin: 28px 0; border-top: 1px solid var(--line); }
.concept-list div { padding: 15px 0; display: grid; grid-template-columns: 120px 1fr; gap: 20px; border-bottom: 1px solid var(--line); }
.concept-list dt { color: var(--accent-soft); font-weight: 760; }
.concept-list dd { margin: 0; color: var(--muted); }
.method { margin: 34px 0; padding: 22px; border: 1px solid #3a4f59; border-radius: 12px; background: #111b20; }
.method > strong { color: var(--accent-soft); }
.method p:last-child, .method ol:last-child { margin-bottom: 0; }
.argument-map { margin: 32px 0; display: grid; grid-template-columns: 1fr 1fr auto 1fr; align-items: stretch; gap: 8px; }
.argument-map > div { padding: 16px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); }
.argument-map > span { align-self: center; color: var(--accent); }
.argument-map small { color: var(--accent); font-weight: 800; }
.argument-map p { margin: 8px 0 0; font-size: 13px; }
.argument-map .conclusion { border-color: #4c6680; }
.logic-grid, .fallacy-grid, .causal-checklist, .dossier { margin: 30px 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.logic-grid article, .fallacy-grid article, .dossier article { padding: 18px; border: 1px solid var(--line); border-radius: 11px; background: var(--surface); }
.logic-grid h4, .fallacy-grid h4, .dossier h4 { margin: 0 0 8px; font-size: 16px; }
.logic-grid p, .fallacy-grid p, .dossier p { margin: 0; color: var(--muted); font-size: 13px; }
.logic-grid .warning { border-color: #664441; }
.causal-checklist { grid-template-columns: repeat(2, 1fr); }
.causal-checklist p { margin: 0; padding: 15px; border-left: 2px solid var(--warm); background: var(--surface); color: var(--muted); }
.causal-checklist strong { color: var(--text); }
.evidence-table { margin: 28px 0; overflow: hidden; border: 1px solid var(--line); border-radius: 10px; }
.evidence-table [role="row"] { display: grid; grid-template-columns: 1fr 1.4fr 1fr; }
.evidence-table [role="row"] > * { padding: 11px 13px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.evidence-table [role="row"] > *:last-child { border-right: 0; }
.evidence-table [role="row"]:last-child > * { border-bottom: 0; }
.evidence-table strong { color: var(--text) !important; background: var(--surface-2); }
.fallacy-grid { grid-template-columns: repeat(2, 1fr); }
.dossier { grid-template-columns: repeat(4, 1fr); }
.dossier span { color: var(--accent); font-size: 11px; font-weight: 800; }
.dossier h4 { margin-top: 24px; }
.case-panel { position: sticky; top: 144px; padding: 26px; border: 1px solid #3c4b50; border-radius: 15px; background: var(--surface-2); }
.case-panel h3 { margin: 0 0 16px; font-size: 25px; line-height: 1.08; letter-spacing: -.035em; }
.case-panel p, .case-panel li { color: #c3cace; font-size: 14px; }
.case-panel ol, .case-panel ul { padding-left: 20px; }
.case-panel li { margin: 8px 0; }

.video-section { margin-top: 80px; padding-top: 58px; border-top: 1px solid var(--line); }
.video-section > h3 { margin: 0 0 24px; font-size: 32px; letter-spacing: -.04em; }
.owned-video-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.owned-video-grid:has(.owned-video:only-child) { grid-template-columns: minmax(0, 820px); }
.owned-video { overflow: hidden; border: 1px solid var(--line); border-radius: 14px; background: var(--surface); }
.owned-video video { width: 100%; aspect-ratio: 16 / 9; background: #050709; object-fit: cover; }
.owned-video-copy { padding: 20px; }
.owned-video-copy h4 { margin: 0; font-size: 21px; line-height: 1.15; letter-spacing: -.025em; }
.owned-video-copy > p:not(.video-label) { margin: 10px 0 0; color: var(--muted); font-size: 13px; }
.owned-video details { margin-top: 18px; padding-top: 14px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
.owned-video summary { cursor: pointer; color: var(--accent-soft); font-weight: 700; }
.owned-video details p { margin-bottom: 0; }

.practice { margin-top: 70px; padding: 34px; display: grid; grid-template-columns: 1.15fr .85fr; gap: 44px; border: 1px solid var(--line); border-radius: 16px; background: var(--surface); }
.practice h3 { margin: 0; font-size: 30px; letter-spacing: -.035em; }
.practice ol { margin: 22px 0 0; padding-left: 22px; color: #c3cace; }
.practice li { margin: 10px 0; padding-left: 5px; }
.practice aside { padding: 22px; border-left: 2px solid var(--warm); background: #191817; }
.practice aside strong { color: #ffd2c3; }
.practice aside p { margin: 10px 0 0; color: #c9c2bf; font-size: 14px; }
.quiz { margin-top: 16px; padding: 28px; border: 1px solid var(--line); border-radius: 14px; background: #0d1214; }
.quiz-question { margin: 0; font-weight: 720; }
.quiz-options { margin-top: 17px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 9px; }
.quiz-option { min-height: 48px; padding: 11px 13px; border: 1px solid var(--line-strong); border-radius: 9px; background: var(--surface); color: #d4dadd; text-align: left; cursor: pointer; }
.quiz-option:hover { border-color: var(--accent); }
.quiz-option.is-correct { border-color: var(--success); background: #10231c; color: #b7f1d5; }
.quiz-option.is-wrong { border-color: var(--error); background: #2a1515; color: #ffc2be; }
.quiz-feedback { min-height: 24px; margin: 14px 0 0; color: var(--muted); font-size: 14px; }
.quiz-feedback.success { color: var(--success); }
.quiz-feedback.error { color: var(--error); }
.module-sources { margin-top: 24px; display: flex; align-items: center; flex-wrap: wrap; gap: 7px; color: var(--subtle); font-size: 11px; }
.module-sources strong { margin-right: 4px; }
.module-sources a { padding: 4px 7px; border: 1px solid var(--line); border-radius: 6px; color: var(--accent-soft); text-decoration: none; }
.complete-row { margin-top: 26px; display: flex; justify-content: flex-end; }
.complete-button { min-height: 46px; padding: 10px 15px; border: 1px solid var(--line-strong); border-radius: 9px; background: transparent; color: var(--text); cursor: pointer; }
.complete-button::before { content: "○"; margin-right: 9px; color: var(--subtle); }
.complete-button.is-complete { border-color: #356b54; background: #10231b; color: #b8efd6; }
.complete-button.is-complete::before { content: "✓"; color: var(--success); }

.sources-section { padding: 110px 0; border-top: 1px solid var(--line); background: #0b0f11; }
.sources-shell { width: min(var(--content), calc(100% - 44px)); margin: 0 auto; }
.sources-lead { max-width: 820px; margin: 24px 0 0; color: var(--muted); font-size: 18px; }
.source-list { margin: 56px 0 0; padding: 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; list-style: none; }
.source-list li { padding: 22px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); }
.source-list li > div { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.source-list span { color: var(--accent); font-size: 11px; font-weight: 800; }
.source-list small { color: var(--subtle); font-size: 10px; text-transform: uppercase; }
.source-list h3 { margin: 26px 0 8px; font-size: 17px; line-height: 1.28; }
.source-list p { margin: 0; color: var(--muted); font-size: 13px; }
.source-list a { margin-top: 15px; display: inline-block; color: var(--accent-soft); font-size: 12px; font-weight: 700; text-decoration: none; }
.source-list a:hover { text-decoration: underline; }
.limit-note { margin-top: 20px; padding: 22px; border-left: 3px solid var(--warm); background: var(--surface); }
.limit-note p { margin: 6px 0 0; color: var(--muted); }
footer { width: min(var(--content), calc(100% - 44px)); min-height: 88px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 20px; border-top: 1px solid var(--line); color: var(--subtle); font-size: 12px; }

button:focus-visible, a:focus-visible, summary:focus-visible, video:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
@media (max-width: 980px) {
  .philosophy-hero { grid-template-columns: 1fr; }
  .hero-art { aspect-ratio: 16 / 8.5; order: -1; }
  .module-header { grid-template-columns: 54px 1fr; }
  .outcomes { grid-column: 2; }
  .lesson-layout { grid-template-columns: 1fr; }
  .lesson-prose { max-width: 800px; }
  .case-panel { position: static; }
  .phase-grid { grid-template-columns: repeat(2, 1fr); }
  .dossier { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  html { scroll-padding-top: 116px; }
  body { font-size: 16px; }
  .header-shell, .philosophy-hero, .course-map, .module-shell, .sources-shell, footer { width: min(100% - 28px, var(--content)); }
  .header-shell { min-height: 62px; }
  .brand span:last-child { display: none; }
  .header-shell nav a { padding-inline: 8px; }
  .philosophy-hero { padding: 32px 0 50px; gap: 34px; }
  .hero-art { border-radius: 14px; }
  h1 { font-size: clamp(46px, 16vw, 66px); }
  .hero-lead { font-size: 18px; }
  .hero-meta { grid-template-columns: repeat(2, 1fr); }
  .progress-copy { align-items: flex-start; flex-direction: column; gap: 4px; }
  .course-nav { top: 62px; }
  .course-nav a { min-height: 52px; }
  .course-map { padding: 72px 0; }
  .course-map > div:first-child { grid-template-columns: 1fr; gap: 24px; }
  .course-map h2, .sources-section h2 { font-size: 44px; }
  .phase-grid { grid-template-columns: 1fr; }
  .phase-grid article { min-height: 150px; }
  .phase-grid h3 { margin-top: 36px; }
  .study-note { grid-template-columns: 1fr; gap: 8px; }
  .philosophy-module { scroll-margin-top: 114px; padding: 76px 0; }
  .module-header { grid-template-columns: 1fr; gap: 18px; }
  .module-index { font-size: 12px; }
  .module-header h2 { font-size: 44px; }
  .outcomes { grid-column: 1; }
  .module-visual { margin-top: 34px; aspect-ratio: 16 / 10; border-radius: 12px; }
  .lesson-layout { margin-top: 46px; gap: 34px; }
  .argument-map { grid-template-columns: 1fr; }
  .argument-map > span { justify-self: center; transform: rotate(90deg); }
  .logic-grid, .fallacy-grid, .causal-checklist, .dossier { grid-template-columns: 1fr; }
  .concept-list div { grid-template-columns: 1fr; gap: 4px; }
  .evidence-table { width: 100%; max-width: 100%; overflow-x: auto; }
  .evidence-table [role="row"] { min-width: 620px; }
  .owned-video-grid { grid-template-columns: 1fr; }
  .practice { padding: 22px; grid-template-columns: 1fr; gap: 26px; }
  .practice aside { padding: 18px; }
  .quiz { padding: 20px; }
  .quiz-options { grid-template-columns: 1fr; }
  .source-list { grid-template-columns: 1fr; }
  .sources-section { padding: 76px 0; }
  footer { min-height: 0; padding: 24px 0; align-items: flex-start; flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}
@media print {
  :root { color-scheme: light; }
  body { background: #fff; color: #000; font-size: 10pt; }
  .course-header, .course-nav, .hero-actions, .progress-shell, .hero-art, .module-visual, .owned-video video, .quiz-options, .complete-row { display: none !important; }
  .philosophy-hero, .course-map, .philosophy-module, .sources-section { width: 100%; padding: 10mm 0; background: #fff !important; }
  .module-shell, .sources-shell { width: 100%; }
  .module-header, .lesson-layout, .practice { grid-template-columns: 1fr; }
  .outcomes { grid-column: 1; }
  .case-panel { position: static; }
  .lesson-prose p, .lesson-prose li, .case-panel p, .case-panel li, .practice li, .source-list p { color: #222; }
  .source-list, .phase-grid { grid-template-columns: 1fr 1fr; }
  a { color: #000; }
}