:root {
  --paper: #f6f2ea;
  --paper-deep: #ece5d9;
  --white: #fffdf9;
  --ink: #17232c;
  --ink-soft: #35444a;
  --muted: #66716f;
  --cinnabar: #b53b2e;
  --cinnabar-deep: #8e2e24;
  --jade: #55736b;
  --jade-pale: #dce4df;
  --rule: #d8d1c5;
  --rule-dark: #aaa194;
  --serif: "Songti SC", "STSong", "Noto Serif CJK SC", Georgia, serif;
  --sans: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --page: 1400px;
  --reading: 790px;
  --ease: 180ms ease;
}

* { box-sizing: border-box; }

html {
  background: var(--paper);
  color: var(--ink);
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

body {
  margin: 0;
  min-width: 980px;
  background:
    linear-gradient(90deg, rgba(181, 59, 46, .035) 1px, transparent 1px) 0 0 / 120px 100%,
    var(--paper);
  color: var(--ink);
  font: 17px/1.78 var(--sans);
  -webkit-font-smoothing: antialiased;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  background: radial-gradient(circle at 84% 6%, rgba(85, 115, 107, .08), transparent 30%);
  content: "";
  pointer-events: none;
}

::selection { background: rgba(181, 59, 46, .2); }

a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 4px; }
a:hover { color: var(--cinnabar); }

button,
input,
textarea { font: inherit; }

button { color: inherit; }

img,
svg { display: block; max-width: 100%; }

svg path,
svg line,
svg polyline { vector-effect: non-scaling-stroke; }

h1,
h2,
h3,
p,
figure,
blockquote,
dl,
dd { margin-top: 0; }

h1,
h2,
h3 {
  font-family: var(--serif);
  font-weight: 600;
  letter-spacing: -.025em;
}

h1 { line-height: 1.08; }
h2 { line-height: 1.22; }
h3 { line-height: 1.35; }

:focus-visible {
  outline: 3px solid var(--cinnabar-deep);
  outline-offset: 4px;
}

[hidden] { display: none !important; }

.skip-link {
  position: fixed;
  left: 24px;
  top: -80px;
  z-index: 100;
  padding: 10px 16px;
  border: 2px solid var(--ink);
  background: var(--white);
  transition: top var(--ease);
}

.skip-link:focus { top: 12px; }

.site-header {
  position: relative;
  z-index: 20;
  display: grid;
  grid-template-columns: 170px minmax(620px, 1fr) auto;
  align-items: center;
  width: min(calc(100% - 64px), var(--page));
  height: 76px;
  margin: 0 auto;
  border-bottom: 1px solid var(--rule-dark);
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  width: max-content;
  text-decoration: none;
}

.brand span {
  font: 700 27px/1 var(--serif);
  letter-spacing: .08em;
}

.brand small {
  color: var(--cinnabar);
  font: 700 10px/1 var(--sans);
  letter-spacing: .2em;
}

.site-header nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(22px, 2.2vw, 38px);
  white-space: nowrap;
}

.site-header nav a {
  position: relative;
  color: var(--ink-soft);
  font-size: 14px;
  text-decoration: none;
}

.site-header nav a::after {
  position: absolute;
  right: 50%;
  bottom: -10px;
  left: 50%;
  height: 2px;
  background: var(--cinnabar);
  content: "";
  transition: right var(--ease), left var(--ease);
}

.site-header nav a:hover::after,
.site-header nav a:focus-visible::after { right: 0; left: 0; }

.header-action,
.button-primary,
.button-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 46px;
  padding: 10px 18px;
  border: 2px solid var(--ink);
  border-radius: 2px;
  background: transparent;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  transition: background var(--ease), color var(--ease), transform var(--ease);
}

.header-action svg,
.button-primary svg,
.text-link svg,
.template-list svg,
.context-index svg,
.stage-rail svg,
.chapter-toc svg,
.chapter-pagination svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
}

.header-action:hover,
.button-primary:hover {
  background: var(--ink);
  color: var(--white);
  transform: translateY(-2px);
}

.button-primary { background: var(--cinnabar); border-color: var(--cinnabar); color: var(--white); }
.button-secondary { border-color: var(--rule-dark); }
.button-secondary:hover { border-color: var(--ink); color: var(--cinnabar); }
.button-primary.inverse { background: var(--white); border-color: var(--white); color: var(--ink); }
.button-primary.inverse:hover { background: transparent; color: var(--white); }

.button-text {
  padding: 5px 0;
  border: 0;
  border-bottom: 1px solid currentColor;
  background: transparent;
  cursor: pointer;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--cinnabar);
  font-weight: 700;
}

.page-shell {
  width: min(calc(100% - 80px), 1280px);
  margin: 0 auto;
  padding: 76px 0 120px;
}

.page-intro {
  display: grid;
  grid-template-columns: minmax(0, 850px) 280px;
  justify-content: space-between;
  gap: 80px;
  align-items: end;
  min-height: 240px;
  padding: 20px 0 56px;
  border-bottom: 2px solid var(--ink);
}

.page-intro h1 {
  max-width: 900px;
  margin-bottom: 22px;
  font-size: clamp(48px, 5vw, 76px);
}

.page-intro p { max-width: 790px; color: var(--ink-soft); font-size: 18px; }

.page-intro aside {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: baseline;
  gap: 4px 14px;
  padding: 20px 0 4px 24px;
  border-left: 4px solid var(--cinnabar);
}

.page-intro aside b { font: 600 36px/1 var(--serif); }
.page-intro aside span,
.page-intro aside small { color: var(--muted); font-size: 13px; }
.page-intro aside small { grid-column: 1 / -1; margin-top: 6px; line-height: 1.6; }
.page-intro .local-note { display: block; font-size: 14px; line-height: 1.6; }

.section-heading { display: flex; align-items: baseline; gap: 20px; }
.section-heading > span { color: var(--cinnabar); font: 700 11px/1 var(--sans); letter-spacing: .16em; }
.section-heading h2 { margin-bottom: 0; font-size: 36px; }
.section-heading p { margin-left: auto; max-width: 560px; color: var(--muted); }

/* Home */
.home-hero {
  position: relative;
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  min-height: 720px;
  width: min(calc(100% - 64px), var(--page));
  margin: 0 auto;
  padding: 88px 0 100px;
  border-bottom: 1px solid var(--rule-dark);
}

.hero-copy { align-self: start; max-width: 670px; }
.hero-copy h1 { margin-bottom: 34px; font-size: clamp(72px, 7.2vw, 110px); letter-spacing: -.055em; }
.hero-copy > p { max-width: 620px; color: var(--ink-soft); font-size: 19px; line-height: 1.8; }
.hero-actions { display: flex; gap: 14px; margin-top: 42px; }

.hero-dialogue {
  position: relative;
  align-self: center;
  min-height: 330px;
  margin: 26px 0 0 48px;
}

.hero-dialogue::before {
  position: absolute;
  top: 88px;
  bottom: 78px;
  left: 50%;
  width: 1px;
  background: var(--rule-dark);
  content: "";
  transform: rotate(16deg);
}

.speech {
  position: absolute;
  width: 70%;
  padding: 25px 28px;
  border: 1px solid var(--rule-dark);
  background: var(--white);
  font: 600 22px/1.65 var(--serif);
  box-shadow: 8px 8px 0 rgba(23, 35, 44, .04);
}

.speech-a { top: 20px; left: 0; transform: rotate(-1deg); }
.speech-b { right: 0; bottom: 50px; border-left: 5px solid var(--cinnabar); transform: rotate(1deg); }
.speech-rule { position: absolute; right: 0; bottom: 0; color: var(--jade); font-size: 12px; font-weight: 700; letter-spacing: .14em; }

.hero-principle {
  position: absolute;
  right: 0;
  bottom: 42px;
  margin: 0;
  color: var(--muted);
  font: italic 17px/1.7 var(--serif);
  text-align: right;
}

.compass-section,
.stage-section,
.project-preview,
.scope-note {
  width: min(calc(100% - 80px), 1280px);
  margin: 0 auto;
}

.compass-section { padding: 110px 0; }
.section-intro { display: grid; grid-template-columns: 88px 1fr; max-width: 900px; }
.section-intro > span { color: var(--cinnabar); font: 600 42px/1 var(--serif); }
.section-intro h2 { margin-bottom: 18px; font-size: 48px; }
.section-intro p { max-width: 720px; color: var(--muted); }
.compass-layout { display: grid; grid-template-columns: minmax(480px, 1fr) minmax(380px, .75fr); align-items: center; gap: 80px; margin-top: 52px; }
.compass-layout img { width: 100%; max-height: 580px; }
.compass-questions { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--ink); }
.compass-questions li { padding: 16px 4px; border-bottom: 1px solid var(--rule); font-size: 16px; }
.compass-questions li::first-letter { color: var(--cinnabar); font: 700 24px/1 var(--serif); }

.principle-strip { padding: 92px max(40px, calc((100vw - 1280px) / 2)); background: var(--ink); color: var(--white); }
.principle-strip > p { color: #bcc3c0; font-size: 12px; font-weight: 700; letter-spacing: .16em; }
.principle-strip > div { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-top: 36px; }
.principle-strip article { min-height: 230px; padding: 0 30px; border-left: 1px solid #435059; }
.principle-strip article:first-child { padding-left: 0; border-left: 0; }
.principle-strip article span { color: #d8897e; font: 600 32px/1 var(--serif); }
.principle-strip h3 { margin: 40px 0 12px; font-size: 25px; }
.principle-strip article p { color: #c9cfcc; font-size: 15px; line-height: 1.75; }

.stage-section { padding: 112px 0; }
.stage-section > .section-heading { justify-content: space-between; }
.stage-section > .section-heading h2 { max-width: 650px; font-size: 48px; }
.stage-rail { margin: 62px 0 36px; border-top: 2px solid var(--ink); }
.stage-rail article { display: grid; grid-template-columns: 170px 1fr 70px; align-items: stretch; min-height: 185px; border-bottom: 1px solid var(--rule-dark); transition: background var(--ease); }
.stage-rail article:hover { background: rgba(255, 253, 249, .55); }
.stage-index { display: flex; flex-direction: column; justify-content: space-between; padding: 24px 32px 24px 0; border-right: 1px solid var(--rule); }
.stage-index b { color: var(--cinnabar); font: 600 43px/1 var(--serif); }
.stage-index span { color: var(--muted); font-size: 11px; font-weight: 700; letter-spacing: .15em; }
.stage-body { display: grid; grid-template-columns: 110px minmax(260px, 370px) 1fr; gap: 25px; align-items: center; padding: 27px 36px; }
.stage-body > p:first-child { color: var(--muted); font-size: 13px; }
.stage-body h3 { margin: 0; font-size: 28px; }
.stage-body > p { margin: 0; color: var(--ink-soft); font-size: 15px; }
.stage-body small { grid-column: 2 / 4; color: var(--jade); }
.stage-rail article > a { display: grid; place-items: center; border-left: 1px solid var(--rule); }
.stage-rail article > a:hover { background: var(--cinnabar); color: var(--white); }

.lab-preview { display: grid; grid-template-columns: .8fr 1.2fr; gap: 80px; padding: 100px max(40px, calc((100vw - 1280px) / 2)); background: var(--jade); color: var(--white); }
.lab-preview > div:first-child { align-self: center; }
.lab-preview h2 { font-size: 48px; }
.lab-preview > div:first-child p { max-width: 500px; color: #e0e7e3; }
.lab-sample { padding: 38px 42px; border: 1px solid rgba(255,255,255,.38); background: rgba(23,35,44,.16); }
.lab-sample > span { color: #d8e4de; font-size: 12px; font-weight: 700; letter-spacing: .12em; }
.lab-sample h3 { margin: 22px 0 30px; font-size: 30px; }
.answer { padding: 15px 18px; border-top: 1px solid rgba(255,255,255,.26); }
.answer b { font-size: 12px; letter-spacing: .1em; }
.answer p { margin: 7px 0 0; font-family: var(--serif); }
.answer.bad { color: #e6c5c0; }
.answer.good { margin-top: 8px; background: rgba(255,255,255,.1); }

.project-preview { display: grid; grid-template-columns: 200px 1fr 250px; gap: 56px; align-items: center; padding: 110px 0; }
.project-number { color: var(--cinnabar); font: 600 140px/.8 var(--serif); }
.project-preview h2 { margin-bottom: 18px; font-size: 45px; }
.project-preview aside { display: grid; gap: 8px; padding: 22px 0 22px 28px; border-left: 4px solid var(--jade); }
.project-preview aside b { margin-bottom: 8px; }
.project-preview aside span { color: var(--muted); font-size: 14px; }

.scope-note { margin-bottom: 110px; padding: 38px 44px; border-top: 2px solid var(--cinnabar); border-bottom: 1px solid var(--rule-dark); }
.scope-note h2 { font-size: 30px; }
.scope-note p { max-width: 1020px; }
.scope-note a { color: var(--cinnabar); font-weight: 700; }

/* Roadmap */
.roadmap-list { margin-top: 70px; border-top: 2px solid var(--ink); }
.roadmap-list > article { display: grid; grid-template-columns: 200px 1fr; min-height: 390px; border-bottom: 1px solid var(--rule-dark); }
.roadmap-meta { display: flex; flex-direction: column; padding: 34px 34px 34px 0; border-right: 1px solid var(--rule); }
.roadmap-meta b { color: var(--cinnabar); font: 600 54px/1 var(--serif); }
.roadmap-meta span { margin-top: 20px; font-weight: 700; }
.roadmap-meta small { margin-top: auto; color: var(--muted); letter-spacing: .13em; }
.roadmap-content { padding: 36px 0 36px 50px; }
.roadmap-content > h2 { margin-bottom: 12px; font-size: 36px; }
.roadmap-content > p { color: var(--muted); }
.roadmap-chapters { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 34px; border-top: 1px solid var(--rule-dark); }
.roadmap-chapters a { display: flex; gap: 15px; padding: 20px 20px 20px 0; border-right: 1px solid var(--rule); text-decoration: none; }
.roadmap-chapters a + a { padding-left: 20px; }
.roadmap-chapters a:last-child { border-right: 0; }
.roadmap-chapters a > span { color: var(--cinnabar); font: 600 22px/1 var(--serif); }
.roadmap-chapters a b { display: block; }
.roadmap-chapters a small { display: block; margin-top: 6px; color: var(--muted); }
.roadmap-content footer { display: flex; gap: 18px; margin-top: 28px; padding-top: 18px; border-top: 1px solid var(--rule); }
.roadmap-content footer span { color: var(--jade); font-size: 12px; font-weight: 700; letter-spacing: .1em; }
.bridge-note { margin-top: 80px; padding-left: 200px; }
.bridge-note h2 { font-size: 38px; }
.bridge-note p { display: grid; grid-template-columns: 370px 1fr; gap: 30px; padding: 16px 0; border-bottom: 1px solid var(--rule); }
.bridge-note span { color: var(--muted); }

/* Diagnostics */
.diagnostic-layout { display: grid; grid-template-columns: minmax(600px, 1fr) 330px; gap: 70px; margin-top: 64px; align-items: start; }
.diagnostic-list { border-top: 2px solid var(--ink); }
.diagnostic-item { display: grid; grid-template-columns: 28px 45px 1fr; gap: 16px; align-items: start; padding: 22px 4px; border-bottom: 1px solid var(--rule); cursor: pointer; }
.diagnostic-item input { width: 19px; height: 19px; margin-top: 5px; accent-color: var(--cinnabar); }
.diagnostic-item > span { color: var(--cinnabar); font: 600 22px/1.3 var(--serif); }
.diagnostic-item b { display: block; font-family: var(--serif); font-size: 20px; }
.diagnostic-item small { color: var(--jade); }
.diagnostic-item p { margin: 7px 0 0; color: var(--muted); font-size: 14px; }
.diagnostic-result { position: sticky; top: 30px; padding: 30px; border: 2px solid var(--ink); background: var(--white); }
.diagnostic-result > p:first-child { color: var(--cinnabar); font-size: 11px; font-weight: 700; letter-spacing: .15em; }
.diagnostic-result strong { display: block; font: 600 48px/1 var(--serif); }
.diagnostic-meter { height: 5px; margin: 22px 0 32px; background: var(--rule); }
.diagnostic-meter span { display: block; height: 100%; width: 0; background: var(--cinnabar); transition: width var(--ease); }
.diagnostic-result h2 { font-size: 27px; }
.diagnostic-result p { color: var(--muted); font-size: 14px; }
.diagnostic-result .button-primary { width: 100%; margin-top: 12px; }
.diagnostic-result .button-text { margin-top: 20px; }

/* Contexts, boundaries, templates */
.context-index { margin-top: 70px; border-top: 2px solid var(--ink); }
.context-index article { position: relative; display: grid; grid-template-columns: 90px 270px 1fr 190px; gap: 30px; align-items: start; padding: 34px 0; border-bottom: 1px solid var(--rule-dark); }
.context-index article > span { color: var(--cinnabar); font: 600 34px/1 var(--serif); }
.context-index h2 { font-size: 28px; }
.context-index article > p { color: var(--ink-soft); }
.context-index dl { display: grid; gap: 12px; margin: 0; }
.context-index dl div { display: grid; grid-template-columns: 76px 1fr; gap: 10px; }
.context-index dt { color: var(--jade); font-size: 12px; font-weight: 700; }
.context-index dd { color: var(--muted); font-size: 14px; }
.context-index article > a { display: flex; align-items: center; gap: 8px; justify-self: end; font-size: 14px; font-weight: 700; }
.culture-rule { margin-top: 90px; padding: 42px; border: 2px solid var(--ink); }
.culture-rule h2 { font-size: 34px; }
.culture-rule > div { display: grid; grid-template-columns: 80px 1fr 80px 1fr; gap: 18px 28px; }
.culture-rule b { color: var(--cinnabar); }
.culture-rule span { color: var(--muted); }

.decision-zones { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 70px; border-top: 2px solid var(--ink); border-bottom: 1px solid var(--rule-dark); }
.decision-zones article { min-height: 245px; padding: 26px; border-right: 1px solid var(--rule); }
.decision-zones article:last-child { border-right: 0; }
.decision-zones b { color: var(--cinnabar); font: 600 38px/1 var(--serif); }
.decision-zones h2 { margin-top: 42px; font-size: 26px; }
.decision-zones p { color: var(--muted); font-size: 14px; }
.decision-zones .danger { background: var(--cinnabar); color: var(--white); }
.decision-zones .danger b,
.decision-zones .danger p { color: var(--white); }
.boundary-compare { margin-top: 90px; }
.boundary-compare h2 { font-size: 38px; }
.boundary-compare table { width: 100%; border-collapse: collapse; }
.boundary-compare th,
.boundary-compare td { padding: 18px; border-bottom: 1px solid var(--rule-dark); text-align: left; vertical-align: top; }
.boundary-compare th { border-top: 2px solid var(--ink); color: var(--jade); font-size: 13px; }
.boundary-compare td:first-child { font-weight: 700; }
.qualification { margin-top: 100px; }
.qualification > article { display: grid; grid-template-columns: 80px 1fr 1.1fr; gap: 32px; padding: 30px 0; border-bottom: 1px solid var(--rule-dark); }
.qualification > article > span { color: var(--cinnabar); font: 600 32px/1 var(--serif); }
.qualification h3 { font-size: 25px; }
.qualification p { color: var(--muted); }
.qualification dl { display: grid; grid-template-columns: 60px 1fr; gap: 10px; margin: 0; }
.qualification dt { color: var(--jade); font-size: 12px; font-weight: 700; }
.qualification dd { font-size: 14px; }
.safety-panel { margin-top: 90px; padding: 42px; border: 2px solid var(--ink); border-left: 8px solid var(--cinnabar); }
.safety-panel > div { max-width: 800px; }
.safety-panel h2 { font-size: 38px; }
.safety-panel > ul { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin: 30px 0; padding: 0; border-top: 1px solid var(--rule-dark); border-bottom: 1px solid var(--rule-dark); list-style: none; }
.safety-panel li { padding: 18px; border-right: 1px solid var(--rule); }
.safety-panel li:last-child { border-right: 0; }
.safety-panel li b,
.safety-panel li span { display: block; }
.safety-panel li b { color: var(--cinnabar); font: 600 25px/1 var(--serif); }
.safety-panel li span { margin-top: 8px; color: var(--muted); font-size: 13px; }
.safety-panel > p { margin-bottom: 0; color: var(--muted); font-size: 13px; }

.template-list { margin-top: 70px; border-top: 2px solid var(--ink); }
.template-list article { display: grid; grid-template-columns: 80px 1fr 170px; gap: 30px; align-items: center; min-height: 150px; padding: 26px 0; border-bottom: 1px solid var(--rule-dark); }
.template-list article > span { color: var(--cinnabar); font: 600 31px/1 var(--serif); }
.template-list h2 { margin-bottom: 8px; font-size: 27px; }
.template-list p { margin: 0; color: var(--muted); }
.template-list small { color: var(--jade); }
.template-list a { display: flex; align-items: center; gap: 8px; justify-self: end; font-weight: 700; }

/* Project */
.track-row { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 70px; border-top: 2px solid var(--ink); border-bottom: 1px solid var(--rule-dark); }
.track-row article { min-height: 250px; padding: 28px; border-right: 1px solid var(--rule); }
.track-row article:last-child { border-right: 0; }
.track-row span { color: var(--cinnabar); font: 600 33px/1 var(--serif); }
.track-row h2 { margin-top: 48px; font-size: 28px; }
.track-row p { color: var(--muted); }
.deliverables { display: grid; grid-template-columns: .75fr 1.25fr; gap: 80px; margin-top: 100px; }
.deliverables .section-heading { display: block; }
.deliverables ol { margin: 0; padding: 0; counter-reset: deliverable; border-top: 2px solid var(--ink); list-style: none; }
.deliverables li { display: grid; grid-template-columns: 55px 1fr; padding: 18px 0; border-bottom: 1px solid var(--rule); counter-increment: deliverable; }
.deliverables li::before { color: var(--cinnabar); content: counter(deliverable, decimal-leading-zero); font: 600 21px/1.4 var(--serif); }
.rubric { margin-top: 100px; }
.rubric > h2 { font-size: 38px; }
.rubric article { display: grid; grid-template-columns: 140px 1fr; padding: 24px 0; border-bottom: 1px solid var(--rule-dark); }
.rubric article > b { color: var(--cinnabar); font: 600 42px/1 var(--serif); }
.rubric h3 { margin-bottom: 6px; font-size: 24px; }
.rubric p { margin: 0; color: var(--muted); }
.project-gates { margin: 90px 0 0 220px; padding: 38px; border: 2px solid var(--ink); }
.project-gates h2 { font-size: 34px; }
.project-gates p { display: grid; grid-template-columns: 220px 1fr; gap: 20px; padding: 12px 0; border-bottom: 1px solid var(--rule); }
.project-gates p:last-child { border-bottom: 0; }
.project-gates span { color: var(--muted); }
.project-cta { margin-top: 90px; padding: 50px; background: var(--jade); color: var(--white); }
.project-cta h2 { font-size: 36px; }
.project-cta p { color: #e3e9e6; }

/* Sources and glossary */
.source-list { margin-top: 70px; border-top: 2px solid var(--ink); }
.source-list article { display: grid; grid-template-columns: 180px 1fr; gap: 50px; padding: 42px 0; border-bottom: 1px solid var(--rule-dark); }
.source-meta { display: flex; flex-direction: column; }
.source-meta span { color: var(--jade); font-size: 12px; font-weight: 700; letter-spacing: .12em; }
.source-meta b { margin-top: 16px; color: var(--cinnabar); font: 600 40px/1 var(--serif); }
.source-meta small { margin-top: auto; color: var(--muted); }
.source-list h2 { font-size: 29px; }
.source-list h2 a { text-decoration: none; }
.source-list h2 a:hover { text-decoration: underline; }
.source-list article > div:last-child > p { color: var(--muted); }
.source-list h3 { margin: 25px 0 7px; font-family: var(--sans); font-size: 13px; letter-spacing: .08em; }
.source-list dl { display: grid; grid-template-columns: 80px 1fr; gap: 12px 20px; margin: 26px 0 0; padding: 22px 0; border-top: 1px solid var(--rule); }
.source-list dt { color: var(--jade); font-size: 12px; font-weight: 700; }
.source-list dd { color: var(--ink-soft); font-size: 14px; }
.glossary-intro { align-items: center; }
.glossary-intro label { display: grid; gap: 8px; color: var(--muted); font-size: 12px; }
.glossary-intro input { width: 310px; padding: 12px 0; border: 0; border-bottom: 2px solid var(--ink); background: transparent; outline-offset: 5px; }
.glossary-status { margin: 50px 0 0; color: var(--cinnabar); font: 600 24px/1 var(--serif); }
.glossary-list { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 20px; border-top: 2px solid var(--ink); }
.glossary-list article { min-height: 210px; padding: 25px 28px 25px 0; border-right: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
.glossary-list article:nth-child(3n + 2),
.glossary-list article:nth-child(3n + 3) { padding-left: 28px; }
.glossary-list article:nth-child(3n) { border-right: 0; }
.glossary-list article > span { float: right; color: var(--cinnabar); font-size: 12px; }
.glossary-list h2 { margin-bottom: 0; font-size: 25px; }
.glossary-list small { color: var(--jade); }
.glossary-list p { margin-top: 14px; color: var(--muted); font-size: 14px; }

/* Chapter */
.chapter-shell {
  display: grid;
  grid-template-columns: 270px minmax(0, 900px);
  justify-content: center;
  gap: 75px;
  width: min(calc(100% - 72px), 1300px);
  margin: 0 auto;
  padding: 62px 0 120px;
}

.chapter-toc {
  position: sticky;
  top: 24px;
  align-self: start;
  max-height: calc(100vh - 48px);
  padding: 10px 26px 20px 0;
  border-right: 1px solid var(--rule-dark);
  overflow-y: auto;
}

.chapter-toc > a { display: flex; align-items: center; gap: 8px; color: var(--muted); font-size: 13px; }
.chapter-toc > p { margin: 38px 0 6px; color: var(--cinnabar); font-size: 11px; font-weight: 700; letter-spacing: .12em; }
.chapter-toc > h2 { font-size: 23px; }
.chapter-toc > .chapter-toc-title { margin: 0; color: var(--ink); font: 600 23px/1.35 var(--serif); letter-spacing: -.02em; }
.chapter-toc nav { margin-top: 28px; border-top: 1px solid var(--rule); }
.chapter-toc nav a { display: grid; grid-template-columns: 30px 1fr; gap: 8px; padding: 10px 0; border-bottom: 1px solid var(--rule); color: var(--ink-soft); font-size: 12px; line-height: 1.45; text-decoration: none; }
.chapter-toc nav a span { color: var(--cinnabar); font-family: var(--serif); }
.chapter-main { min-width: 0; }
.chapter-hero { display: grid; grid-template-columns: 120px 1fr; gap: 36px; min-height: 480px; padding: 38px 0 60px; border-bottom: 2px solid var(--ink); }
.chapter-number { color: var(--cinnabar); font: 600 94px/.9 var(--serif); }
.chapter-hero > div:last-child > p:first-child { color: var(--jade); font-size: 12px; font-weight: 700; letter-spacing: .12em; }
.chapter-hero h1 { max-width: 760px; margin: 24px 0; font-size: clamp(48px, 5.1vw, 72px); }
.chapter-summary { max-width: 740px; color: var(--ink-soft); font: 20px/1.75 var(--serif); }
.chapter-hero dl { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 44px; }
.chapter-hero dl div { padding-top: 13px; border-top: 1px solid var(--rule-dark); }
.chapter-hero dt { color: var(--muted); font-size: 11px; font-weight: 700; letter-spacing: .08em; }
.chapter-hero dd { margin: 5px 0 0; font-size: 13px; }
.opening-problem { position: relative; margin: 72px 0; padding: 34px 42px 34px 68px; border-left: 5px solid var(--cinnabar); background: var(--white); }
.opening-problem::before { position: absolute; left: 20px; top: 20px; color: var(--rule-dark); content: "“"; font: 68px/.8 var(--serif); }
.opening-problem span { color: var(--cinnabar); font-size: 11px; font-weight: 700; letter-spacing: .13em; }
.opening-problem p { margin: 15px 0 0; font: 24px/1.7 var(--serif); }
.anchor-row { display: grid; grid-template-columns: repeat(3, 1fr); margin: 0 0 90px; border-top: 2px solid var(--ink); border-bottom: 1px solid var(--rule-dark); }
.anchor-row article { min-height: 230px; padding: 24px; border-right: 1px solid var(--rule); }
.anchor-row article:last-child { border-right: 0; }
.anchor-row span { color: var(--cinnabar); font: 600 27px/1 var(--serif); }
.anchor-row h2 { margin: 38px 0 10px; font-size: 24px; }
.anchor-row p { color: var(--muted); font-size: 14px; }
.lesson-section { margin: 0 0 92px; }
.lesson-section > header { display: grid; grid-template-columns: 54px 1fr; gap: 17px; align-items: baseline; margin-bottom: 28px; padding-bottom: 15px; border-bottom: 1px solid var(--rule-dark); }
.lesson-section > header span { color: var(--cinnabar); font: 600 23px/1 var(--serif); }
.lesson-section > header h2 { margin: 0; font-size: 38px; }
.lesson-prose { max-width: var(--reading); margin-left: 70px; }
.lesson-prose p { margin-bottom: 1.35em; }
.lesson-prose h3 { margin: 2em 0 .7em; font-size: 25px; }
.lesson-prose ul,
.lesson-prose ol { padding-left: 1.4em; }
.lesson-prose li { margin: .45em 0; }
.lesson-prose blockquote { margin: 30px 0; padding: 20px 26px; border-left: 4px solid var(--jade); background: rgba(85,115,107,.08); font-family: var(--serif); }
.lesson-prose table { display: block; width: 100%; border-collapse: collapse; overflow-x: auto; }
.lesson-prose th,
.lesson-prose td { min-width: 150px; padding: 12px; border-bottom: 1px solid var(--rule); text-align: left; vertical-align: top; }
.lesson-prose th { color: var(--jade); font-size: 13px; }
.lesson-section figure { margin: 42px 0 0 70px; padding: 28px; border-top: 2px solid var(--ink); border-bottom: 1px solid var(--rule-dark); background: rgba(255,253,249,.5); }
.lesson-section figure img { width: 100%; max-height: 650px; object-fit: contain; }
.lesson-section figcaption { margin-top: 18px; color: var(--muted); font-size: 13px; }
.behavior-module,
.power-module,
.boundary-module,
.repair-module,
.misconception-section,
.stuck-section,
.practice-section,
.mastery-section,
.chapter-summary-block { margin: 100px 0; }
.behavior-module { padding: 40px; border: 2px solid var(--ink); }
.behavior-scenario { max-width: 700px; margin: 30px 0; font: 23px/1.65 var(--serif); }
.behavior-compare { position: relative; min-height: 290px; margin: 24px 0; }
.behavior-compare::before { position: absolute; top: 40px; bottom: 40px; left: 50%; width: 1px; background: var(--rule-dark); content: ""; transform: rotate(11deg); }
.behavior-compare article { position: absolute; width: 47%; min-height: 150px; padding: 23px; border: 1px solid var(--rule-dark); background: var(--white); }
.behavior-compare article b { font-size: 12px; letter-spacing: .1em; }
.behavior-compare article p { margin-top: 10px; font-family: var(--serif); }
.behavior-compare .weak { top: 0; left: 0; color: var(--muted); }
.behavior-compare .strong { right: 0; bottom: 0; border-left: 5px solid var(--cinnabar); }
.behavior-why { padding-top: 22px; border-top: 1px solid var(--rule); }
.behavior-module > ul { color: var(--muted); }
.power-module > div:last-child { display: grid; grid-template-columns: repeat(2, 1fr); margin-top: 35px; border-top: 2px solid var(--ink); }
.power-module article { min-height: 175px; padding: 25px; border-right: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
.power-module article:nth-child(2n) { border-right: 0; }
.power-module h3 { font-size: 23px; }
.power-module p { color: var(--muted); }
.boundary-module { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; padding: 42px; border: 2px solid var(--ink); border-left: 8px solid var(--cinnabar); }
.boundary-module > div > span { color: var(--cinnabar); font-size: 11px; font-weight: 700; letter-spacing: .13em; }
.boundary-module h2 { margin-top: 20px; font-size: 34px; }
.boundary-module ul { margin: 0; padding-left: 1.2em; }
.boundary-module li { margin-bottom: 12px; }
.repair-module > div:last-child { margin-top: 34px; border-top: 2px solid var(--ink); }
.repair-module > div:last-child p { padding: 17px 20px; border-bottom: 1px solid var(--rule); }
.misconception-section > div:last-child { display: grid; grid-template-columns: repeat(2, 1fr); margin-top: 35px; border-top: 2px solid var(--ink); }
.misconception-section article { min-height: 155px; padding: 24px; border-right: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
.misconception-section article:nth-child(2n) { border-right: 0; }
.misconception-section h3 { font-size: 22px; }
.misconception-section p { color: var(--muted); font-size: 14px; }
.stuck-section { display: grid; grid-template-columns: 250px 1fr; gap: 60px; padding: 42px 0; border-top: 2px solid var(--ink); border-bottom: 1px solid var(--rule-dark); }
.stuck-section .section-heading { display: block; }
.stuck-section .section-heading h2 { margin-top: 15px; }
.stuck-section ol { margin: 0; padding-left: 1.25em; }
.stuck-section li { padding: 10px 0; }
.practice-section > article { display: grid; grid-template-columns: 70px 240px 1fr; gap: 24px; padding: 30px 0; border-bottom: 1px solid var(--rule-dark); }
.practice-section > article > span { color: var(--cinnabar); font: 600 31px/1 var(--serif); }
.practice-section h3 { font-size: 24px; }
.practice-section dl { display: grid; grid-template-columns: 120px 1fr; gap: 12px 20px; margin: 0; }
.practice-section dt { color: var(--jade); font-size: 11px; font-weight: 700; letter-spacing: .08em; }
.practice-section dd { font-size: 14px; }
.mastery-section { padding: 43px; background: var(--ink); color: var(--white); }
.mastery-section > div:first-child { display: flex; align-items: baseline; gap: 25px; }
.mastery-section > div:first-child span { color: #d8897e; font-size: 11px; font-weight: 700; letter-spacing: .13em; }
.mastery-section h2 { font-size: 34px; }
.mastery-prompt { margin: 26px 0; font: 21px/1.7 var(--serif); }
.mastery-section details { padding-top: 20px; border-top: 1px solid #46525a; }
.mastery-section summary { cursor: pointer; color: #dce3df; }
.mastery-section details > div { margin-top: 18px; color: #d1d7d4; }
.chapter-summary-block { display: grid; grid-template-columns: 230px 1fr; gap: 55px; padding: 45px 0; border-top: 2px solid var(--ink); border-bottom: 1px solid var(--rule-dark); }
.chapter-summary-block > div > span { color: var(--cinnabar); font-size: 11px; font-weight: 700; letter-spacing: .13em; }
.chapter-summary-block h2 { margin-top: 15px; font-size: 34px; }
.chapter-summary-block ol { margin: 0; }
.chapter-summary-block > p { grid-column: 2; padding-top: 20px; border-top: 1px solid var(--rule); color: var(--muted); }
.chapter-pagination { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; padding-top: 30px; border-top: 2px solid var(--ink); }
.chapter-pagination a { display: flex; align-items: center; gap: 18px; min-height: 80px; text-decoration: none; }
.chapter-pagination .next { justify-content: flex-end; text-align: right; }
.chapter-pagination small { display: block; color: var(--muted); font-size: 11px; }

/* Practice lab */
.practice-safety { display: grid; grid-template-columns: 150px 1fr; gap: 25px; margin: 50px 0 30px; padding: 20px 0; border-top: 2px solid var(--cinnabar); border-bottom: 1px solid var(--rule); }
.practice-safety b { color: var(--cinnabar); }
.practice-safety p { margin: 0; color: var(--muted); }
.domain-filter { display: flex; flex-wrap: wrap; gap: 0; margin: 35px 0; border-bottom: 1px solid var(--rule-dark); }
.domain-filter button { padding: 11px 17px; border: 0; border-bottom: 3px solid transparent; background: transparent; cursor: pointer; }
.domain-filter button:hover,
.domain-filter button.is-active { border-color: var(--cinnabar); color: var(--cinnabar); }
.practice-workbench { display: grid; grid-template-columns: 350px 1fr; min-height: 760px; border: 2px solid var(--ink); background: rgba(255,253,249,.45); }
.scenario-list { border-right: 1px solid var(--rule-dark); max-height: 960px; overflow-y: auto; }
.scenario-list button { display: grid; grid-template-columns: 36px 1fr 20px; gap: 12px; width: 100%; padding: 18px; border: 0; border-bottom: 1px solid var(--rule); background: transparent; text-align: left; cursor: pointer; }
.scenario-list button:hover { background: var(--white); }
.scenario-list button.is-active { background: var(--ink); color: var(--white); }
.scenario-list button > span { color: var(--cinnabar); font-family: var(--serif); }
.scenario-list small,
.scenario-list b { display: block; }
.scenario-list small { color: var(--muted); font-size: 11px; }
.scenario-list button.is-active small { color: #bbc3c0; }
.scenario-list i { color: var(--cinnabar); font-style: normal; }
.scenario-stage { padding: 38px 44px; min-width: 0; }
.scenario-stage > header > p { color: var(--jade); font-size: 12px; font-weight: 700; letter-spacing: .1em; }
.scenario-stage > header h2 { font-size: 38px; }
.safety-mode { margin: 25px 0; padding: 20px; border-left: 6px solid var(--cinnabar); background: rgba(181,59,46,.08); }
.safety-mode b { color: var(--cinnabar); letter-spacing: .12em; }
.safety-mode p { margin: 8px 0 0; }
.scenario-setup { margin-top: 34px; padding-top: 26px; border-top: 1px solid var(--rule-dark); }
.scenario-setup h3,
.pressure-rounds h3 { font: 600 24px/1.3 var(--serif); }
.scenario-setup label { display: grid; gap: 10px; margin-top: 24px; color: var(--muted); font-size: 13px; }
.scenario-setup textarea { width: 100%; resize: vertical; padding: 15px; border: 1px solid var(--rule-dark); border-radius: 0; background: var(--white); color: var(--ink); }
.answer-comparison { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 35px; }
.answer-comparison article { min-height: 150px; padding: 22px; border: 1px solid var(--rule-dark); background: var(--white); }
.answer-comparison article > span { font-size: 11px; font-weight: 700; letter-spacing: .1em; }
.answer-comparison article p { margin: 10px 0 0; font-family: var(--serif); }
.answer-comparison .weak { color: var(--muted); }
.answer-comparison .strong { border-left: 5px solid var(--cinnabar); }
.answer-comparison > p { grid-column: 1 / 3; }
.pressure-rounds { margin-top: 35px; padding-top: 28px; border-top: 1px solid var(--rule-dark); }
.pressure-tabs { display: flex; gap: 10px; }
.pressure-tabs button { padding: 8px 16px; border: 1px solid var(--ink); background: transparent; cursor: pointer; }
.pressure-tabs button.is-active,
.pressure-tabs button:hover { background: var(--ink); color: var(--white); }
#pressure-result { min-height: 145px; margin-top: 18px; padding: 22px; background: var(--paper-deep); }
#pressure-result blockquote { margin: 0 0 15px; padding-left: 18px; border-left: 4px solid var(--cinnabar); font: 19px/1.6 var(--serif); }
.scenario-stage > footer { display: flex; align-items: center; justify-content: space-between; gap: 25px; margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--rule-dark); }
.practice-progress { display: grid; grid-template-columns: 1fr auto auto; gap: 35px; align-items: center; margin-top: 45px; padding: 28px 0; border-top: 2px solid var(--ink); }
.practice-progress h2 { margin-bottom: 5px; font-size: 28px; }
.practice-progress p { margin: 0; color: var(--muted); }
.practice-progress strong { color: var(--cinnabar); font: 600 32px/1 var(--serif); }

.site-footer {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 60px;
  align-items: end;
  width: min(calc(100% - 64px), var(--page));
  min-height: 220px;
  margin: 0 auto;
  padding: 50px 0;
  border-top: 2px solid var(--ink);
}

.footer-brand { font: 700 31px/1 var(--serif); text-decoration: none; }
.site-footer p { margin: 10px 0 0; color: var(--muted); font-size: 13px; }
.footer-links { display: flex; gap: 26px; }
.footer-links a { font-size: 13px; }
.footer-note { max-width: 330px; justify-self: end; text-align: right; }

@media (max-width: 1220px) {
  .site-header { grid-template-columns: 145px 1fr auto; }
  .site-header nav { gap: 18px; }
  .site-header nav a:nth-child(4) { display: none; }
  .home-hero { grid-template-columns: 1fr .82fr; }
  .hero-copy h1 { font-size: 78px; }
  .stage-body { grid-template-columns: 90px 330px 1fr; }
  .chapter-shell { grid-template-columns: 235px minmax(0, 820px); gap: 45px; }
  .lesson-prose,
  .lesson-section figure { margin-left: 45px; }
  .context-index article { grid-template-columns: 75px 230px 1fr 165px; gap: 22px; }
}

@media (max-width: 1020px) {
  body { min-width: 760px; }
  .site-header { width: calc(100% - 40px); grid-template-columns: 135px 1fr auto; }
  .site-header nav a:nth-child(3),
  .site-header nav a:nth-child(5) { display: none; }
  .home-hero { width: calc(100% - 50px); }
  .hero-copy h1 { font-size: 68px; }
  .page-shell,
  .compass-section,
  .stage-section,
  .project-preview,
  .scope-note { width: calc(100% - 50px); }
  .stage-body { grid-template-columns: 75px 280px 1fr; padding: 25px; }
  .chapter-shell { grid-template-columns: 210px minmax(0, 1fr); width: calc(100% - 40px); gap: 32px; }
  .chapter-hero { grid-template-columns: 90px 1fr; gap: 24px; }
  .chapter-number { font-size: 72px; }
  .chapter-hero h1 { font-size: 50px; }
  .lesson-prose,
  .lesson-section figure { margin-left: 20px; }
  .practice-workbench { grid-template-columns: 300px 1fr; }
  .scenario-stage { padding: 30px; }
}

@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 {
  body { min-width: 0; background: white; }
  .site-header,
  .site-footer,
  .chapter-toc,
  .chapter-pagination,
  .button-primary,
  .button-secondary { display: none !important; }
  .chapter-shell { display: block; width: auto; padding: 0; }
  .chapter-main { width: auto; }
  a { text-decoration: none; }
}

/* 2026-07 desktop design and typography audit */
h1,
h2 { text-wrap: balance; }

.lesson-prose p,
.lesson-prose li,
.page-intro p,
.chapter-summary-block p { text-wrap: pretty; }

main [id] { scroll-margin-top: 104px; }

.lesson-prose a,
.source-list a,
figcaption a { overflow-wrap: anywhere; }

pre,
table { max-width: 100%; overflow-x: auto; tab-size: 2; }

.chapter-number,
.chapter-meta,
.practice-progress strong { font-variant-numeric: tabular-nums; }