:root {
  color-scheme: dark;
  --bg: #0b0f17;
  --surface: #101620;
  --surface-2: #151d29;
  --surface-3: #1b2432;
  --line: #2a3546;
  --line-strong: #435068;
  --text: #f4f7fb;
  --muted: #a8b3c7;
  --muted-2: #7e8ba2;
  --mint: #61d8c5;
  --mint-dark: #153d39;
  --amber: #ffb454;
  --amber-dark: #49331b;
  --blue: #77a9ff;
  --danger: #ff8d8d;
  --content: 1180px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --shadow: 0 24px 80px rgba(0, 0, 0, .24);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
  background: var(--bg);
}

body {
  margin: 0;
  overflow-x: hidden;
  color: var(--text);
  background: var(--bg);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

a { color: inherit; }
button, select { font: inherit; }
button, a, select, summary { -webkit-tap-highlight-color: transparent; }
img { display: block; max-width: 100%; }

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

.skip-link {
  position: fixed;
  z-index: 200;
  left: 16px;
  top: 12px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  color: #07120f;
  background: var(--mint);
  transform: translateY(-160%);
}

.skip-link:focus { transform: translateY(0); }

.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 26px;
  min-height: 72px;
  padding: 12px max(24px, calc((100vw - var(--content)) / 2));
  border-bottom: 1px solid rgba(67, 80, 104, .58);
  background: rgba(11, 15, 23, .94);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 760;
  letter-spacing: -.02em;
  text-decoration: none;
  white-space: nowrap;
}

.brand-mark {
  padding: 3px 7px;
  border: 1px solid var(--mint);
  border-radius: 5px;
  color: var(--mint);
  font-size: 12px;
  letter-spacing: .12em;
}

.primary-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  overflow-x: auto;
  scrollbar-width: none;
}

.primary-nav::-webkit-scrollbar { display: none; }

.primary-nav a {
  color: var(--muted);
  font-size: 13px;
  font-weight: 620;
  text-decoration: none;
  white-space: nowrap;
}

.primary-nav a:hover { color: var(--text); }
.sections-toggle { display: none; }

.header-actions,
.hero-actions,
.walkthrough-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.button {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  justify-content: center;
  padding: 9px 14px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 680;
  text-decoration: none;
  transition: background-color .18s ease, border-color .18s ease, color .18s ease, transform .18s ease;
}

.button:hover { transform: translateY(-1px); }
.button:disabled { cursor: not-allowed; opacity: .42; transform: none; }
.button-primary { color: #07120f; background: var(--mint); }
.button-primary:hover { background: #7ce5d4; }
.button-secondary { border-color: var(--line-strong); color: var(--text); background: var(--surface-2); }
.button-secondary:hover { border-color: var(--mint); }
.button-quiet { border-color: var(--line); color: var(--muted); background: transparent; }
.button-quiet:hover { color: var(--text); border-color: var(--line-strong); }

.section-shell {
  width: min(calc(100% - 48px), var(--content));
  margin-inline: auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(300px, .7fr);
  gap: clamp(42px, 7vw, 96px);
  align-items: center;
  min-height: 680px;
  padding-block: 86px 72px;
}

.eyebrow,
.card-label,
.ledger-kicker,
.chain-overline {
  margin: 0 0 10px;
  color: var(--mint);
  font-size: 12px;
  font-weight: 760;
  letter-spacing: .13em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  max-width: 780px;
  font-size: clamp(64px, 9vw, 122px);
  font-weight: 820;
  line-height: .92;
  letter-spacing: -.07em;
}

.paper-title {
  max-width: 880px;
  margin: 34px 0 18px;
  color: var(--text);
  font-family: Georgia, "Times New Roman", "Songti SC", serif;
  font-size: clamp(24px, 3vw, 38px);
  line-height: 1.18;
  letter-spacing: -.025em;
}

.hero-deck {
  max-width: 760px;
  margin: 0;
  color: var(--muted);
  font-size: 18px;
}

.authors { margin: 28px 0 0; font-weight: 690; }
.affiliation { margin: 2px 0 0; color: var(--muted-2); }
.hero-actions { flex-wrap: wrap; margin-top: 32px; }

.hero-ledger {
  padding: 28px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.metric-row {
  display: grid;
  grid-template-columns: 116px 1fr;
  gap: 14px;
  align-items: center;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.metric-row strong { color: var(--text); font-size: 29px; letter-spacing: -.04em; }
.metric-row span { color: var(--muted); line-height: 1.35; }
.ledger-note { margin: 18px 0 0; color: var(--muted-2); font-size: 13px; }

.content-section {
  padding-block: 86px;
  border-top: 1px solid var(--line);
}

.section-heading {
  display: grid;
  grid-template-columns: 72px minmax(0, 760px);
  gap: 26px;
  align-items: start;
  margin-bottom: 38px;
}

.section-number {
  margin: 0;
  color: var(--line-strong);
  font-size: 48px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -.05em;
}

h2, h3, h4 { margin-top: 0; }
h2 { margin-bottom: 12px; font-size: clamp(34px, 5vw, 58px); line-height: 1.04; letter-spacing: -.045em; }
h3 { margin-bottom: 10px; font-size: clamp(25px, 3vw, 36px); line-height: 1.12; letter-spacing: -.03em; }
h4 { margin-bottom: 8px; font-size: 18px; line-height: 1.25; }
.section-heading p:last-child, .panel-head p:last-child { margin: 0; color: var(--muted); font-size: 18px; }

.audit-flow,
.access-chain {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 18px;
}

.audit-flow > div,
.access-chain > div {
  min-height: 140px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.audit-flow span {
  display: block;
  margin-bottom: 26px;
  color: var(--mint);
  font-size: 12px;
  font-weight: 760;
  letter-spacing: .12em;
}

.audit-flow strong,
.access-chain strong { display: block; max-width: 260px; font-size: 17px; line-height: 1.35; }
.two-column { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.compact-grid { margin-block: 14px; }

.definition-card,
.factor-grid article,
.reliability-grid article,
.agent-boundaries article {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.definition-card p:last-child,
.factor-grid p,
.reliability-grid p,
.agent-boundaries p:last-child { margin: 0; color: var(--muted); }

.boundary-note,
.future-note {
  margin-top: 18px;
  padding: 22px 24px;
  border-left: 4px solid var(--amber);
  background: var(--amber-dark);
}

.boundary-note p,
.future-note p { margin: 5px 0 0; color: #f4dfc1; }

.threat-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(280px, .85fr);
  gap: 22px;
}

.access-chain { margin: 0; }
.access-chain strong { font-size: 15px; }
.chain-overline { display: block; color: var(--amber); }
.check-list { display: grid; gap: 12px; margin: 0; padding: 0; list-style: none; }
.check-list li { padding: 15px 16px; border-left: 2px solid var(--mint); color: var(--muted); background: var(--surface); }

.factor-grid,
.reliability-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.factor-grid strong { display: block; margin-bottom: 12px; color: var(--amber); font-size: 18px; }
blockquote { margin: 26px 0; padding: 24px 28px; border-left: 4px solid var(--mint); color: var(--text); background: var(--mint-dark); font-family: Georgia, "Times New Roman", "Songti SC", serif; font-size: 24px; line-height: 1.45; }

.timeline-card { padding: 22px 24px; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface); }
.timeline-labels { position: relative; display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; padding-top: 12px; }
.timeline-labels::before { content: ""; position: absolute; top: 0; right: 0; left: 0; height: 2px; background: var(--line-strong); }
.timeline-labels span { display: grid; gap: 2px; }
.timeline-labels span:nth-child(2) { text-align: center; }
.timeline-labels span:last-child { text-align: right; }
.timeline-labels strong { color: var(--mint); }
.timeline-labels small { color: var(--muted); }

.insight-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.65fr) minmax(280px, .65fr);
  gap: 22px;
  align-items: stretch;
}

.research-figure { margin: 0; }
.research-figure img { width: 100%; height: auto; border-radius: var(--radius-md); }
.research-figure figcaption { margin-top: 10px; color: var(--muted-2); font-size: 13px; }
.schematic-figure { position: relative; padding: 16px 16px 10px 44px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--surface); }
.schematic-figure img { aspect-ratio: 16 / 9; object-fit: cover; }
.schematic-figure figcaption { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; }
.schematic-figure figcaption strong { margin-left: auto; color: var(--muted); font-weight: 520; }
.axis-label { position: absolute; color: var(--muted-2); font-size: 12px; font-weight: 700; letter-spacing: .04em; }
.axis-y { top: 50%; left: 5px; transform: rotate(-90deg) translateX(-50%); transform-origin: left top; }
.axis-x { right: 20px; bottom: 48px; }
.legend-item { display: inline-flex; gap: 7px; align-items: center; color: var(--muted); }
.swatch { width: 24px; height: 3px; border-radius: 4px; }
.swatch.amber { background: var(--amber); }
.swatch.mint { background: var(--mint); }

.equation-card,
.normalisation-note {
  padding: 26px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  background: var(--surface-2);
}
.equation { margin: 14px 0; font-family: "SFMono-Regular", Consolas, monospace; font-size: clamp(22px, 3vw, 34px); letter-spacing: -.04em; }
.equation-card > p:not(.card-label):not(.equation):not(.fine-print) { color: var(--muted); }
.relation { margin: 24px 0; padding: 14px; border-radius: var(--radius-sm); color: var(--mint); background: var(--mint-dark); font-family: "SFMono-Regular", Consolas, monospace; font-weight: 700; }
.fine-print { color: var(--muted-2); font-size: 13px; }

.threshold-panel,
.paper-figure-panel,
.limitations,
.walkthrough,
.explorer,
.citation-card {
  margin-top: 28px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
}

.panel-head { max-width: 760px; margin-bottom: 22px; }
.threshold-flow { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.threshold-flow article { padding: 20px; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface-2); }
.threshold-flow article > span { display: block; margin-bottom: 18px; color: var(--mint); font-size: 13px; font-weight: 800; }
.threshold-flow p { margin: 0; color: var(--muted); }
.threshold-flow .equation-small { margin-bottom: 10px; color: var(--text); font-family: "SFMono-Regular", Consolas, monospace; }

.framework-figure { padding: 12px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: #f5f8fb; }
.framework-figure img { border-radius: var(--radius-md); }
.image-button { display: block; width: 100%; padding: 0; border: 0; border-radius: var(--radius-md); cursor: zoom-in; background: transparent; }
.framework-figure figcaption { padding: 0 8px; color: #566173; }

.method-steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin: 18px 0; padding: 0; list-style: none; }
.method-steps li { min-height: 146px; padding: 20px; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface); }
.method-steps span { color: var(--mint); font-size: 12px; font-weight: 800; }
.method-steps p { margin: 24px 0 0; }
.normalisation-note { display: grid; grid-template-columns: .8fr 1.2fr; gap: 30px; align-items: center; margin-top: 18px; }
.normalisation-note p { margin: 0; }
.normalisation-note p:last-child { color: var(--muted); }

.technical-details { margin-top: 18px; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface); }
.technical-details summary { padding: 18px 22px; cursor: pointer; font-weight: 720; }
.parameter-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; border-top: 1px solid var(--line); background: var(--line); }
.parameter-grid div { display: grid; gap: 3px; padding: 16px; background: var(--surface); }
.parameter-grid span { color: var(--muted-2); font-size: 12px; }
.parameter-grid strong { font-family: "SFMono-Regular", Consolas, monospace; font-size: 13px; }

.walkthrough-head { display: flex; justify-content: space-between; gap: 20px; align-items: start; }
.walkthrough-controls { flex-wrap: wrap; justify-content: flex-end; }
.walkthrough-stage { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 18px; }
.loop-state { display: grid; gap: 12px; min-height: 108px; padding: 16px; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface-2); }
.loop-state span { color: var(--muted-2); font-size: 12px; }
.loop-state strong { align-self: end; font-family: "SFMono-Regular", Consolas, monospace; }
.loop-state.accent { border-color: var(--mint); background: var(--mint-dark); }
.walkthrough-status { margin: 16px 0 0; color: var(--muted); }

.evidence-summary { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.evidence-summary div { display: grid; gap: 4px; min-height: 118px; padding: 20px; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface); }
.evidence-summary strong { color: var(--mint); font-size: 34px; letter-spacing: -.04em; }
.evidence-summary span { color: var(--muted); line-height: 1.35; }

.explorer-controls { display: grid; grid-template-columns: 1.4fr .7fr .7fr auto; gap: 14px; align-items: end; }
.explorer-controls p { margin: 0; }
.explorer-controls p:last-child { color: var(--muted); }
.explorer-controls label { display: grid; gap: 6px; color: var(--muted); font-size: 13px; }
select { min-height: 42px; padding: 8px 34px 8px 11px; border: 1px solid var(--line-strong); border-radius: var(--radius-sm); color: var(--text); background: var(--surface-2); }
.explorer-output { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 18px; }
.explorer-output article { display: grid; gap: 5px; padding: 18px; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface-2); }
.explorer-output article.accent { border-color: var(--mint); background: var(--mint-dark); }
.explorer-output span { color: var(--muted); font-size: 13px; }
.explorer-output strong { font-size: 29px; }
.explorer-output small { color: var(--muted-2); }
.data-error { color: var(--danger); }

.table-wrap { margin-top: 18px; overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius-md); }
table { width: 100%; min-width: 920px; border-collapse: collapse; background: var(--surface); }
caption { padding: 14px 18px; border-bottom: 1px solid var(--line); color: var(--muted); text-align: left; }
th, td { padding: 15px 18px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { color: var(--muted); background: var(--surface-2); font-size: 12px; letter-spacing: .04em; text-transform: uppercase; }
td:nth-last-child(-n+2) { color: var(--mint); font-weight: 700; }
tbody tr:last-child td { border-bottom: 0; }

.figure-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.figure-grid figure { margin: 0; padding: 8px; border: 1px solid var(--line); border-radius: var(--radius-md); background: #f4f4f2; }
.figure-grid img { display: block; width: 100%; height: auto; }
.figure-grid figcaption { padding: 10px 8px 4px; color: #353b45; font-size: 13px; font-weight: 680; }

.reliability-grid { grid-template-columns: repeat(3, 1fr); }
.reliability-grid article { min-height: 165px; }
.limitations-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px 30px; margin: 0; padding-left: 24px; color: var(--muted); }
.limitations-list li { padding-left: 7px; }
.limitations-list li::marker { color: var(--amber); font-weight: 760; }

.transfer-grid { display: grid; gap: 1px; border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden; background: var(--line); }
.transfer-grid article { display: grid; grid-template-columns: repeat(2, 1fr); background: var(--surface); }
.transfer-grid p { margin: 0; padding: 20px 22px; }
.transfer-grid p:first-child { border-right: 1px solid var(--line); }
.transfer-grid p span { color: var(--muted); }
.transfer-grid strong { color: var(--mint); }
.agent-boundaries { margin-top: 18px; }
.future-note { border-left-color: var(--mint); background: var(--mint-dark); }
.future-note p { color: #d5f1ec; }

.resource-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.resource-grid a { display: grid; gap: 28px; min-height: 150px; padding: 22px; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface); text-decoration: none; }
.resource-grid a:hover { border-color: var(--mint); }
.resource-grid span { color: var(--muted); font-size: 13px; }
.resource-grid strong { align-self: end; }
.citation-head { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.citation-head p { margin: 0; }
pre { margin: 18px 0 0; overflow-x: auto; color: #d9e2ef; font: 13px/1.65 "SFMono-Regular", Consolas, monospace; white-space: pre; }

.site-footer { display: flex; justify-content: space-between; gap: 20px; padding-block: 30px 54px; border-top: 1px solid var(--line); color: var(--muted-2); }
.site-footer p { margin: 0; }

.focus-controls {
  z-index: 120;
  display: flex;
  align-items: center;
  gap: 14px;
  justify-content: space-between;
  min-height: 62px;
  padding: 9px max(24px, calc((100vw - var(--content)) / 2));
  border-top: 1px solid var(--line-strong);
  background: rgba(16, 22, 32, .96);
  backdrop-filter: blur(18px);
}

.focus-controls[hidden] { display: none; }
.focus-controls p { margin: 0; color: var(--muted); text-align: center; }

body.focus-mode {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  width: 100%;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
}
body.focus-mode .site-header { position: static; }
body.focus-mode .primary-nav { display: none; }
body.focus-mode .sections-toggle { display: none; }
body.focus-mode main { min-height: 0; overflow: hidden; }
body.focus-mode main > section:not(.focus-stage),
body.focus-mode .site-footer { display: none; }

.focus-stage[hidden] { display: none; }
body.focus-mode .focus-stage {
  display: block;
  height: 100%;
  overflow: hidden;
}

.focus-slide {
  display: none;
  width: min(calc(100% - 48px), var(--content));
  height: 100%;
  margin-inline: auto;
  padding-block: clamp(14px, 2vh, 22px);
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
}
.focus-slide.is-active { display: block; }
.focus-slide h2[tabindex="-1"]:focus { outline: none; }
.focus-slide-head {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 22px;
  align-items: start;
  margin-bottom: clamp(12px, 1.8vh, 18px);
}
.focus-slide-head h2 { margin: 0; max-width: 1040px; font-size: clamp(30px, 3.45vw, 44px); line-height: 1.02; }
.focus-slide-head > div > p:last-child:not(.eyebrow) { margin: 8px 0 0; color: var(--muted); font-size: 15px; line-height: 1.45; }
.focus-slide-number { margin: 0; color: var(--line-strong); font-size: 42px; font-weight: 820; line-height: 1; }
.focus-slide article { min-width: 0; }
.focus-slide p { overflow-wrap: anywhere; }

.focus-audit-flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.focus-audit-flow > div { min-height: 104px; padding: 16px; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface); }
.focus-audit-flow span { display: block; margin-bottom: 17px; color: var(--mint); font-size: 11px; font-weight: 800; letter-spacing: .12em; }
.focus-audit-flow strong { display: block; font-size: 15px; line-height: 1.3; }
.focus-access-strip { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-top: 12px; padding: 12px 14px; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface-2); }
.focus-access-strip strong { margin-right: 6px; color: var(--amber); }
.focus-access-strip span { padding: 5px 9px; border: 1px solid var(--line-strong); border-radius: 999px; color: var(--muted); font-size: 12px; }
.focus-boundary { margin-top: 12px; padding: 13px 16px; border-left: 3px solid var(--amber); background: var(--amber-dark); }
.focus-boundary p { display: inline; margin: 0 0 0 7px; color: #f4dfc1; }

.focus-factor-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.focus-factor-grid article { min-height: 100px; padding: 15px; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface); }
.focus-factor-grid strong { color: var(--amber); }
.focus-factor-grid p { margin: 7px 0 0; color: var(--muted); font-size: 13px; line-height: 1.42; }
.focus-timeline { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 12px; }
.focus-timeline span { display: grid; gap: 1px; padding: 10px 12px; border-top: 2px solid var(--line-strong); background: var(--surface); }
.focus-timeline .accent { border-color: var(--mint); background: var(--mint-dark); }
.focus-timeline strong { color: var(--mint); }
.focus-timeline small { color: var(--muted); }
.focus-quote { margin: 12px 0 0; padding: 14px 18px; font-size: 17px; line-height: 1.38; }

.focus-insight-grid { display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(300px, .75fr); gap: 14px; }
.focus-schematic, .focus-score-card { margin: 0; padding: 14px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--surface); }
.focus-schematic img { display: block; width: 100%; height: auto; max-height: 40vh; object-fit: contain; border-radius: var(--radius-md); }
.focus-schematic figcaption { margin-top: 8px; color: var(--muted); font-size: 12px; font-weight: 700; }
.focus-score-card .equation { margin: 8px 0; font-size: 28px; }
.focus-score-card > p:not(.card-label):not(.equation):not(.fine-print):not(.relation) { margin: 0; color: var(--muted); font-size: 13px; }
.focus-score-card .relation { margin: 14px 0; }
.focus-score-card .fine-print { margin: 0; line-height: 1.45; }

.focus-threshold-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 11px; }
.focus-threshold-grid article { min-height: 192px; padding: 16px; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface); }
.focus-threshold-grid article > span { color: var(--mint); font-size: 11px; font-weight: 800; }
.focus-threshold-grid h3 { margin: 10px 0 8px; font-size: 18px; }
.focus-threshold-grid p { margin: 6px 0 0; color: var(--muted); font-size: 13px; line-height: 1.43; }
.focus-threshold-grid .equation-small { color: var(--text); font-family: "SFMono-Regular", Consolas, monospace; }
.focus-normalization { display: grid; grid-template-columns: minmax(340px, .8fr) 1.2fr; gap: 20px; align-items: center; margin-top: 12px; padding: 12px 16px; border: 1px solid var(--mint); border-radius: var(--radius-md); background: var(--mint-dark); }
.focus-normalization .equation { margin: 0; font-size: 25px; }
.focus-normalization p:last-child { margin: 0; color: #d5f1ec; font-size: 13px; line-height: 1.42; }

.focus-method-grid { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(310px, .7fr); gap: 14px; align-items: center; }
.focus-framework { margin: 0; padding: 8px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: #f5f8fb; }
.focus-framework img { display: block; width: 100%; height: auto; max-height: 50vh; object-fit: contain; border-radius: var(--radius-md); }
.focus-method-side { display: grid; gap: 12px; }
.focus-method-steps { display: grid; gap: 7px; margin: 0; padding: 0; list-style: none; }
.focus-method-steps li { display: grid; grid-template-columns: 28px 1fr; gap: 8px; align-items: start; padding: 9px 10px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface); }
.focus-method-steps span { color: var(--mint); font-size: 11px; font-weight: 800; }
.focus-method-steps p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.35; }

.focus-result-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.focus-result-grid article { display: grid; min-height: 118px; align-content: center; padding: 17px; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface); }
.focus-result-grid strong { color: var(--mint); font-size: clamp(29px, 3.2vw, 40px); line-height: 1; }
.focus-result-grid span { margin-top: 10px; color: var(--muted); }
.focus-evidence-boundary { margin-top: 12px; padding: 15px 18px; border-left: 3px solid var(--amber); background: var(--amber-dark); }
.focus-evidence-boundary ul { display: grid; grid-template-columns: repeat(2, 1fr); gap: 7px 26px; margin: 8px 0 0; padding-left: 19px; color: #f4dfc1; font-size: 13px; line-height: 1.42; }

.focus-reliability-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 11px; }
.focus-reliability-grid article { min-height: 142px; padding: 16px; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface); }
.focus-reliability-grid p:last-child { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.5; }
.focus-limit-strip { display: grid; grid-template-columns: auto repeat(4, 1fr); gap: 1px; margin-top: 12px; border: 1px solid var(--line); border-left: 3px solid var(--amber); border-radius: var(--radius-md); overflow: hidden; background: var(--line); }
.focus-limit-strip > * { display: flex; align-items: center; min-height: 92px; padding: 12px; background: var(--amber-dark); }
.focus-limit-strip strong { color: var(--amber); font-size: 12px; }
.focus-limit-strip span { color: #f4dfc1; font-size: 12px; line-height: 1.4; }

.focus-transfer-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.focus-transfer-grid article { display: grid; grid-template-columns: repeat(2, 1fr); min-height: 116px; border: 1px solid var(--line); border-radius: var(--radius-md); overflow: hidden; background: var(--surface); }
.focus-transfer-grid p { display: grid; align-content: start; gap: 5px; margin: 0; padding: 13px; }
.focus-transfer-grid p:first-child { border-right: 1px solid var(--line); }
.focus-transfer-grid strong { color: var(--mint); font-size: 12px; }
.focus-transfer-grid span { color: var(--muted); font-size: 12px; line-height: 1.35; }
.focus-agent-boundaries { display: grid; grid-template-columns: .9fr 1.4fr; gap: 10px; margin-top: 10px; }
.focus-agent-boundaries article { padding: 12px 14px; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface-2); }
.focus-agent-boundaries p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.42; }
.focus-agent-boundaries .card-label { margin-bottom: 6px; color: var(--amber); }
.focus-future { margin-top: 10px; padding: 10px 14px; border-left: 3px solid var(--mint); background: var(--mint-dark); }
.focus-future strong { color: var(--mint); font-size: 12px; }
.focus-future p { display: inline; margin: 0 0 0 7px; color: #d5f1ec; font-size: 12px; }

.image-dialog { width: min(94vw, 1320px); max-height: 92vh; padding: 58px 18px 18px; border: 1px solid var(--line-strong); border-radius: var(--radius-lg); color: var(--text); background: var(--surface); box-shadow: var(--shadow); }
.image-dialog::backdrop { background: rgba(2, 5, 10, .86); backdrop-filter: blur(5px); }
.image-dialog img { width: 100%; max-height: calc(92vh - 90px); object-fit: contain; border-radius: var(--radius-md); }
.dialog-close { position: absolute; top: 10px; right: 10px; }
.walkthrough-dialog { width: min(92vw, 1040px); max-height: 90vh; padding: 62px 26px 26px; border: 1px solid var(--line-strong); border-radius: var(--radius-lg); color: var(--text); background: var(--surface); box-shadow: var(--shadow); }
.walkthrough-dialog::backdrop { background: rgba(2, 5, 10, .9); backdrop-filter: blur(5px); }
.walkthrough-dialog h2 { font-size: clamp(28px, 4vw, 44px); }

@media (max-width: 1080px) {
  .site-header { grid-template-columns: auto 1fr; }
  .primary-nav { grid-column: 1 / -1; grid-row: 2; justify-content: flex-start; padding-bottom: 2px; }
  .header-actions { justify-self: end; }
  .hero { min-height: auto; padding-block: 70px; }
  .factor-grid { grid-template-columns: repeat(2, 1fr); }
  .method-steps { grid-template-columns: repeat(2, 1fr); }
  .explorer-controls { grid-template-columns: 1fr 1fr; }
  .explorer-controls > div { grid-column: 1 / -1; }
  .parameter-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 820px) {
  .section-shell { width: min(calc(100% - 32px), var(--content)); }
  .hero,
  .insight-layout,
  .threat-layout,
  .normalisation-note { grid-template-columns: 1fr; }
  .hero { gap: 42px; }
  .section-heading { grid-template-columns: 50px minmax(0, 1fr); gap: 12px; }
  .section-number { font-size: 35px; }
  .audit-flow,
  .access-chain,
  .threshold-flow,
  .evidence-summary,
  .explorer-output,
  .reliability-grid,
  .resource-grid { grid-template-columns: 1fr; }
  .audit-flow > div,
  .access-chain > div { min-height: 110px; }
  .two-column,
  .limitations-list,
  .figure-grid { grid-template-columns: 1fr; }
  .walkthrough-head { display: grid; }
  .walkthrough-controls { justify-content: flex-start; }
  .walkthrough-stage { grid-template-columns: repeat(2, 1fr); }
  .parameter-grid { grid-template-columns: repeat(2, 1fr); }
  .focus-slide { width: min(calc(100% - 32px), var(--content)); }
  .focus-slide-head { grid-template-columns: 46px minmax(0, 1fr); gap: 12px; }
  .focus-slide-number { font-size: 32px; }
  .focus-audit-flow,
  .focus-factor-grid,
  .focus-threshold-grid,
  .focus-result-grid,
  .focus-reliability-grid,
  .focus-transfer-grid { grid-template-columns: repeat(2, 1fr); }
  .focus-insight-grid,
  .focus-method-grid { grid-template-columns: 1fr; }
  .focus-normalization { grid-template-columns: 1fr; gap: 6px; }
  .focus-limit-strip { grid-template-columns: 1fr 1fr; }
  .focus-limit-strip strong { grid-column: 1 / -1; min-height: auto; }
  .focus-agent-boundaries { grid-template-columns: 1fr; }
}

@media (max-width: 700px) {
  .site-header { grid-template-columns: auto 1fr; min-height: 64px; }
  .sections-toggle { display: inline-flex; }
  .primary-nav {
    position: static;
    display: none;
    grid-column: 1 / -1;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 4px;
    width: 100%;
    max-height: min(70vh, 520px);
    padding: 10px;
    overflow-y: auto;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-md);
    background: rgba(16, 22, 32, .99);
    box-shadow: 0 16px 34px rgba(0, 0, 0, .18);
  }
  .site-header.nav-open .primary-nav { display: grid; }
  .primary-nav a { padding: 11px 12px; border-radius: var(--radius-sm); background: var(--surface-2); }
}

@media (max-width: 560px) {
  body { font-size: 15px; }
  .site-header { gap: 10px; padding: 10px 16px; }
  .brand { font-size: 14px; }
  .brand-mark { font-size: 10px; }
  .header-actions .button { min-height: 36px; padding: 7px 10px; font-size: 13px; }
  .header-actions { gap: 5px; }
  .header-actions .button { padding-inline: 8px; }
  .hero h1 { font-size: 58px; }
  .paper-title { margin-top: 24px; font-size: 27px; }
  .hero-actions { align-items: stretch; }
  .hero-actions .button { width: 100%; }
  .content-section { padding-block: 62px; }
  .section-heading { grid-template-columns: 1fr; }
  .section-number { font-size: 14px; letter-spacing: .08em; }
  h2 { font-size: 36px; }
  blockquote { padding: 20px; font-size: 20px; }
  .factor-grid,
  .method-steps,
  .walkthrough-stage,
  .parameter-grid { grid-template-columns: 1fr; }
  .timeline-labels { grid-template-columns: 1fr; }
  .timeline-labels::before { display: none; }
  .timeline-labels span:nth-child(2), .timeline-labels span:last-child { text-align: left; }
  .schematic-figure { padding-left: 18px; }
  .axis-y { display: none; }
  .axis-x { bottom: 70px; }
  .schematic-figure figcaption strong { margin-left: 0; }
  .threshold-panel,
  .paper-figure-panel,
  .limitations,
  .walkthrough,
  .explorer,
  .citation-card { padding: 19px; }
  .explorer-controls { grid-template-columns: 1fr; }
  .explorer-controls > div { grid-column: auto; }
  .transfer-grid article { grid-template-columns: 1fr; }
  .transfer-grid p:first-child { border-right: 0; border-bottom: 1px solid var(--line); }
  .site-footer { display: grid; }
  .focus-controls { min-width: 0; padding: 8px 10px; }
  .focus-controls p { font-size: 12px; }
  .focus-controls .button { min-height: 36px; padding: 7px 10px; font-size: 12px; }
  .focus-slide { width: calc(100% - 24px); padding-block: 12px; }
  .focus-slide-head { grid-template-columns: 1fr; }
  .focus-slide-number { font-size: 13px; letter-spacing: .12em; }
  .focus-slide-head h2 { font-size: 29px; }
  .focus-audit-flow,
  .focus-factor-grid,
  .focus-threshold-grid,
  .focus-result-grid,
  .focus-reliability-grid,
  .focus-transfer-grid,
  .focus-evidence-boundary ul,
  .focus-limit-strip { grid-template-columns: 1fr; }
  .focus-audit-flow > div { min-height: 78px; }
  .focus-timeline { grid-template-columns: 1fr; }
  .focus-insight-grid,
  .focus-agent-boundaries { grid-template-columns: 1fr; }
  .focus-framework img { height: auto; max-height: 34vh; }
  .focus-transfer-grid article { grid-template-columns: 1fr; }
  .focus-transfer-grid p:first-child { border-right: 0; border-bottom: 1px solid var(--line); }
  .focus-limit-strip strong { grid-column: auto; }
  .walkthrough-dialog { width: calc(100% - 20px); padding: 58px 16px 18px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .001ms !important; animation-duration: .001ms !important; animation-iteration-count: 1 !important; }
}

@media print {
  .site-header, .focus-controls, .image-dialog, .walkthrough-dialog, .focus-stage { display: none !important; }
  body { color: #111; background: #fff; }
  .content-section { break-inside: avoid; }
}

/* 2026 light research reading system */
:root {
  color-scheme: light;
  --bg: #f6f8fb;
  --surface: #ffffff;
  --surface-2: #eef3f7;
  --surface-3: #e6edf3;
  --line: #d9e1ea;
  --line-strong: #b8c6d4;
  --text: #172033;
  --muted: #566176;
  --muted-2: #748096;
  --mint: #168a7a;
  --mint-dark: #e7f5f1;
  --amber: #9a6413;
  --amber-dark: #fff5df;
  --blue: #356da8;
  --danger: #b54747;
  --shadow: 0 18px 48px rgba(23, 32, 51, .08);
}

.skip-link,
.button-primary { color: #fff; }
.button-primary:hover { background: #0f7467; }
.site-header {
  grid-template-columns: minmax(250px, auto) minmax(360px, 1fr) auto;
  gap: 20px;
  border-bottom-color: rgba(185, 198, 212, .9);
  background: rgba(255, 255, 255, .94);
  box-shadow: 0 4px 18px rgba(23, 32, 51, .04);
}
.header-identity { display: flex; align-items: center; gap: 15px; min-width: 0; }
.portfolio-link { color: var(--muted); font-size: 12px; font-weight: 720; text-decoration: none; white-space: nowrap; }
.portfolio-link:hover { color: var(--mint); }
.portfolio-mobile { display: none; }
.brand { padding-left: 14px; border-left: 1px solid var(--line); }
.sections-toggle { display: inline-flex; }
.section-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: max(24px, calc((100vw - var(--content)) / 2));
  width: min(620px, calc(100vw - 48px));
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 6px;
  padding: 12px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-md);
  background: var(--surface);
  box-shadow: var(--shadow);
}
.section-menu[hidden] { display: none; }
.site-header.nav-open .section-menu { display: grid; }
.section-menu a { padding: 10px 12px; border-radius: var(--radius-sm); color: var(--muted); font-size: 13px; font-weight: 650; text-decoration: none; }
.section-menu a:hover,
.section-menu a:focus-visible { color: var(--text); background: var(--surface-2); }
.section-menu .menu-portfolio { color: var(--mint); background: var(--mint-dark); }
.hero-ledger { border-color: var(--line); box-shadow: var(--shadow); }
.section-number { color: #9aa8b9; }
.boundary-note p,
.future-note p,
.focus-boundary p,
.focus-evidence-boundary ul,
.focus-limit-strip span { color: #674817; }
.future-note p,
.focus-future p { color: #315f58; }
.focus-controls { background: rgba(255, 255, 255, .97); }
.focus-normalization p:last-child { color: #315f58; }
.image-dialog::backdrop,
.walkthrough-dialog::backdrop { background: rgba(23, 32, 51, .64); }
pre { padding: 18px; border-radius: var(--radius-sm); color: #27364d; background: #eef3f8; }

.primer-flow {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 22px;
  margin-bottom: 18px;
}
.primer-flow article { position: relative; min-height: 126px; padding: 18px; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface); }
.primer-flow article:not(:last-child)::after { content: "→"; position: absolute; top: 50%; right: -18px; color: var(--line-strong); font-weight: 800; transform: translateY(-50%); }
.primer-flow article.accent { border-color: rgba(22, 138, 122, .45); background: var(--mint-dark); }
.primer-flow article > span,
.innovation-grid article > span,
.defense-grid article > span { display: block; margin-bottom: 18px; color: var(--mint); font-size: 11px; font-weight: 800; letter-spacing: .12em; }
.primer-flow strong { display: block; line-height: 1.3; }
.primer-flow p { margin: 10px 0 0; color: var(--muted); font-size: 12px; line-height: 1.4; }
.primer-flow .equation-small { color: var(--text); font-family: "SFMono-Regular", Consolas, monospace; font-size: 18px; }
.primer-equations { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.primer-equations article { padding: 22px; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface); }
.primer-equations .equation { font-size: clamp(17px, 2vw, 24px); overflow-wrap: anywhere; }
.primer-equations p:last-child { margin-bottom: 0; color: var(--muted); }
.primer-timeline { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 18px; }
.primer-timeline span { display: grid; gap: 4px; padding: 14px; border-top: 3px solid var(--line-strong); background: var(--surface); }
.primer-timeline .accent { border-color: var(--mint); background: var(--mint-dark); }
.primer-timeline strong { color: var(--mint); }
.primer-timeline small { color: var(--muted); }
.primer-boundary { margin: 12px 0 0; }
.innovation-panel,
.defense-panel { margin-top: 30px; padding: 28px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--surface); }
.innovation-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.innovation-grid article,
.defense-grid article { padding: 20px; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface-2); }
.innovation-grid p,
.defense-grid p { margin: 0; color: var(--muted); }
.innovation-note { margin: 16px 0 0; padding: 14px 16px; border-left: 3px solid var(--mint); color: #315f58; background: var(--mint-dark); }

.technical-details > summary { display: flex; align-items: center; justify-content: space-between; gap: 18px; list-style: none; }
.technical-details > summary::-webkit-details-marker { display: none; }
.technical-details > summary::after { content: "+"; color: var(--mint); font-size: 22px; font-weight: 500; }
.technical-details[open] > summary::after { content: "−"; }
.technical-details > summary small { margin-left: auto; color: var(--muted-2); font-weight: 600; }
.intuition-content,
.low-fpr-content { padding: 0 22px 22px; border-top: 1px solid var(--line); }
.intuition-equations { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; padding-top: 18px; }
.intuition-equations .equation { margin: 0; padding: 14px; border-radius: var(--radius-sm); background: var(--surface-2); font-size: clamp(15px, 1.7vw, 20px); overflow-wrap: anywhere; }
.intuition-content > p { color: var(--muted); }
.intuition-relation { padding: 14px 16px; color: var(--mint) !important; background: var(--mint-dark); font-family: "SFMono-Regular", Consolas, monospace; font-weight: 700; text-align: center; }
.model-path-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; border-top: 1px solid var(--line); background: var(--line); }
.model-path-grid article { padding: 22px; background: var(--surface); }
.model-path-grid ol { margin: 12px 0 0; padding-left: 22px; color: var(--muted); }
.model-path-grid li + li { margin-top: 8px; }
.model-path-equations { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; padding: 18px 22px 0; }
.model-path-equations .equation { margin: 0; padding: 14px; border-radius: var(--radius-sm); background: var(--surface-2); font-size: clamp(16px, 2vw, 23px); overflow-wrap: anywhere; }
.shared-controls { padding: 18px 22px 22px; }
.arithmetic-note { display: grid; gap: 4px; margin: 18px 0; padding: 16px; border-left: 3px solid var(--amber); color: #674817; background: var(--amber-dark); }
.low-fpr-content .check-list { grid-template-columns: repeat(2, 1fr); }
.baseline-table-wrap { margin: 0; border-width: 1px 0 0; border-radius: 0; }
.baseline-table { min-width: 780px; }
.baseline-table td:nth-last-child(-n+2) { color: inherit; font-weight: 400; }
.baseline-table .ours-row td { color: #135f54; background: var(--mint-dark); font-weight: 650; }
.compute-parity { margin: 0; padding: 16px 22px; border-top: 1px solid var(--line); color: #315f58; background: var(--mint-dark); font-weight: 650; }
.status-tag { display: inline-flex; padding: 6px 10px; border: 1px solid #e5c986; border-radius: 999px; color: #7b5113; background: var(--amber-dark); font-size: 12px; font-weight: 750; }
.defense-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }

.focus-primer-flow { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; }
.focus-primer-flow article { min-height: 80px; padding: 12px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface); }
.focus-primer-flow article.accent { border-color: var(--mint); background: var(--mint-dark); }
.focus-primer-flow span { color: var(--mint); font-size: 10px; font-weight: 800; }
.focus-primer-flow strong { display: block; margin-top: 8px; font-size: 12px; line-height: 1.25; }
.focus-primer-flow p { margin: 5px 0 0; color: var(--muted); font-family: "SFMono-Regular", Consolas, monospace; }
.focus-primer-equations { display: grid; grid-template-columns: 1.4fr 1fr; gap: 10px; margin-top: 10px; }
.focus-primer-equations .equation { margin: 0; padding: 10px 14px; border-radius: var(--radius-sm); background: var(--surface-2); font-size: clamp(16px, 2vw, 23px); }
.focus-access-chain { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.focus-access-chain article { min-height: 105px; padding: 15px; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface); }
.focus-access-chain span { display: block; margin-bottom: 16px; color: var(--amber); font-size: 11px; font-weight: 800; text-transform: uppercase; }
.focus-access-chain strong { display: block; font-size: 14px; line-height: 1.35; }
.focus-threshold-strip { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 10px; }
.focus-threshold-strip span { display: grid; gap: 4px; padding: 10px 12px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface-2); }
.focus-threshold-strip strong { color: var(--mint); }
.focus-threshold-strip small { color: var(--muted); line-height: 1.35; }
.focus-method-equation { margin: 0; padding: 10px; border-radius: var(--radius-sm); color: #315f58; background: var(--mint-dark); font-size: 22px; text-align: center; }
.focus-defense { margin-top: 9px; padding: 9px 13px; border-left: 3px solid var(--amber); color: #674817; background: var(--amber-dark); }
.focus-defense strong { font-size: 12px; }
.focus-defense p { display: inline; margin: 0 0 0 7px; color: #674817; font-size: 12px; }

body.focus-mode .site-header { grid-template-columns: auto 1fr auto; }
body.focus-mode .portfolio-link { display: none; }
body.focus-mode .brand { border-left: 0; padding-left: 0; }
body.focus-mode .sections-toggle { display: none; }
.focus-slide { padding-bottom: calc(clamp(18px, 2.5vh, 28px) + env(safe-area-inset-bottom)); }
.focus-controls { padding-bottom: calc(9px + env(safe-area-inset-bottom)); }

@media (max-width: 1180px) {
  .site-header { grid-template-columns: minmax(235px, auto) 1fr auto; gap: 12px; }
  .primary-nav { gap: 12px; }
  .primary-nav a { font-size: 12px; }
  .button { padding-inline: 11px; }
}

@media (max-width: 1080px) {
  .site-header { grid-template-columns: 1fr auto; }
  .primary-nav { display: none; }
  .header-identity { grid-column: 1; }
  .header-actions { grid-column: 2; }
}

@media (max-width: 820px) {
  .primer-flow { grid-template-columns: 1fr; gap: 10px; }
  .primer-flow article { min-height: 86px; }
  .primer-flow article:not(:last-child)::after { content: "↓"; top: auto; right: 50%; bottom: -12px; transform: translateX(50%); }
  .primer-equations,
  .innovation-grid,
  .intuition-equations,
  .model-path-grid,
  .model-path-equations,
  .defense-grid { grid-template-columns: 1fr; }
  .focus-primer-flow { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 700px) {
  .site-header { grid-template-columns: 1fr auto; }
  .portfolio-desktop { display: none; }
  .portfolio-mobile { display: inline; }
  .brand { padding-left: 10px; }
  .site-header.nav-open .primary-nav { display: none; }
  .section-menu { position: static; grid-column: 1 / -1; grid-template-columns: repeat(2, minmax(0, 1fr)); width: 100%; max-height: min(65vh, 520px); margin-top: 4px; overflow-y: auto; }
  .section-menu .menu-portfolio { grid-column: 1 / -1; }
}

@media (max-width: 560px) {
  .site-header { gap: 8px; }
  .header-identity { gap: 7px; }
  .portfolio-link { font-size: 11px; }
  .brand { gap: 5px; padding-left: 7px; }
  .brand > span:last-child { display: none; }
  .header-actions .button { padding-inline: 7px; }
  .primer-timeline,
  .low-fpr-content .check-list { grid-template-columns: 1fr; }
  .technical-details > summary { align-items: flex-start; padding: 15px 16px; }
  .technical-details > summary small { display: none; }
  .intuition-content,
  .low-fpr-content { padding: 0 16px 16px; }
  .focus-primer-flow { grid-template-columns: 1fr; }
  .focus-primer-flow article { min-height: 64px; }
  .focus-primer-equations,
  .focus-access-chain,
  .focus-threshold-strip { grid-template-columns: 1fr; }
  .focus-slide { padding-bottom: calc(32px + env(safe-area-inset-bottom)); }
  .focus-controls { min-height: 62px; padding-bottom: calc(8px + env(safe-area-inset-bottom)); }
}

/* Evidence-first vector explanations */
.vector-figure { margin: 0; }
.vector-button {
  display: block;
  width: 100%;
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 18px;
  color: inherit;
  background: var(--surface);
  cursor: zoom-in;
}
.vector-button:hover { border-color: rgba(22, 138, 122, .62); }
.vector-button object { display: block; width: 100%; pointer-events: none; }
.audit-visual .vector-button object { aspect-ratio: 1600 / 620; }
.comparison-visual { margin-top: 24px; }
.comparison-visual .vector-button { background: #f6f8fb; }
.comparison-visual img { display: block; width: 100%; height: auto; }
.localized-figure { display: none; }
html[lang="en"] .localized-figure-en,
html[lang="zh-CN"] .localized-figure-zh { display: block; }
.comparison-visual figcaption {
  padding: 11px 5px 0;
  color: var(--muted-2);
  font-size: 13px;
  line-height: 1.5;
}
.manifold-visual .vector-button object { aspect-ratio: 1600 / 900; }

.audit-mobile-flow,
.focus-audit-mobile { display: none; }

.audit-legend {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 12px;
}
.audit-legend > span {
  display: grid;
  grid-template-columns: auto auto minmax(0, 1fr);
  gap: 9px;
  align-items: center;
  min-height: 50px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
}
.audit-legend small { color: var(--muted); line-height: 1.35; }
.legend-dot { width: 12px; height: 12px; border-radius: 50%; }
.legend-dot.member { background: var(--mint); }
.legend-dot.nonmember { border: 2px dashed #d97706; background: #fff5df; }
.compact-boundary,
.interpretation-boundary {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  margin: 12px 0 0;
  padding: 12px 14px;
  border: 1px solid #c7dbe3;
  border-radius: 12px;
  color: #315467;
  background: #edf5f8;
  font-size: 13px;
  line-height: 1.45;
}
.compact-boundary > span:first-child,
.interpretation-boundary > span:first-child {
  display: inline-grid;
  flex: 0 0 22px;
  width: 22px;
  height: 22px;
  place-items: center;
  border: 1px solid #8eb6c4;
  border-radius: 50%;
  color: var(--blue);
  font-family: Georgia, serif;
  font-weight: 800;
}

.manifold-primer {
  display: grid;
  grid-template-columns: minmax(290px, .8fr) minmax(0, 1.45fr);
  gap: 24px 30px;
  align-items: center;
  margin-bottom: 30px;
  padding: clamp(22px, 3vw, 34px);
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--surface);
}
.manifold-copy h3 { max-width: 520px; }
.manifold-copy p:not(.eyebrow) { margin: 0 0 13px; color: var(--muted); }
.manifold-copy p:last-child { margin-bottom: 0; }
.manifold-legend {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}
.manifold-legend article {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface-2);
}
.manifold-legend p { display: grid; gap: 3px; margin: 0; }
.manifold-legend span { color: var(--muted); font-size: 13px; line-height: 1.4; }
.legend-symbol { display: block; width: 30px; height: 30px; border-radius: 9px; }
.legend-symbol.ambient { border: 1px solid var(--line-strong); background: #f6f8fb; }
.legend-symbol.support { border: 1px solid #7aa6b4; background: linear-gradient(135deg, #d9edf1, #d8f1ea 55%, #f7e8c9); }
.legend-symbol.radius { border: 3px solid var(--mint); border-radius: 50%; background: rgba(22,138,122,.08); }
.interpretation-boundary { grid-column: 1 / -1; margin-top: -2px; }
.interpretation-boundary > span:last-child { display: grid; gap: 2px; }

.focus-vector-figure { margin: 0; min-height: 0; }
.focus-vector-figure .vector-button { width: min(100%, 1080px); margin-inline: auto; }
.focus-vector-figure object { aspect-ratio: 1600 / 620; }
.focus-slide[data-focus-slide="1"] .focus-vector-figure .vector-button {
  width: min(100%, min(1040px, calc(48vh * 1600 / 620)));
}
.focus-slide[data-focus-slide="1"] .focus-boundary.compact {
  margin-top: 8px;
  padding-block: 9px;
  font-size: 12px;
}
.focus-insight-grid .focus-manifold .vector-button {
  width: min(100%, calc(47vh * 16 / 9));
}
.focus-insight-grid .focus-manifold object { aspect-ratio: 1600 / 900; }
.focus-boundary.compact { margin-top: 10px; padding-block: 11px; }
.empirical-tag {
  display: inline-flex;
  margin: 4px 0 0;
  padding: 5px 9px;
  border: 1px solid rgba(22, 138, 122, .35);
  border-radius: 999px;
  color: #135f54 !important;
  background: var(--mint-dark);
  font-size: 12px;
  font-weight: 720;
}

.dialog-vector {
  display: block;
  width: 100%;
  height: min(78vh, 840px);
  border: 0;
  border-radius: var(--radius-md);
  background: var(--surface);
}
.dialog-vector[hidden],
.image-dialog img[hidden] { display: none; }

@media (max-width: 820px) {
  .manifold-primer { grid-template-columns: 1fr; }
  .manifold-legend { grid-column: auto; grid-template-columns: 1fr; }
  .interpretation-boundary { grid-column: auto; }
}

@media (max-width: 560px) {
  .audit-visual,
  .focus-slide[data-focus-slide="1"] > .focus-vector-figure { display: none; }
  .audit-mobile-flow,
  .focus-audit-mobile { display: grid; }
  .audit-mobile-flow {
    gap: 8px;
    margin-top: 4px;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: var(--surface);
  }
  .mobile-input-pair { display: grid; grid-template-columns: 1fr auto 1fr; gap: 8px; align-items: center; }
  .mobile-input-pair article,
  .mobile-probe {
    display: grid;
    gap: 8px;
    place-items: center;
    min-height: 104px;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 12px;
    text-align: center;
    background: var(--surface-2);
  }
  .mobile-input-pair strong,
  .mobile-probe strong { font-size: 12px; line-height: 1.25; }
  .mobile-probe { min-height: 88px; border-color: #8eb6c4; background: #e8f1f5; }
  .mobile-probe small { color: var(--muted); }
  .wave-icon,
  .model-icon,
  .probe-icon { position: relative; display: block; width: 48px; height: 34px; }
  .wave-icon::before { content: "∿∿"; position: absolute; inset: 0; color: var(--blue); font-size: 30px; line-height: 1; }
  .model-icon { border: 2px solid var(--blue); border-radius: 8px; background: linear-gradient(90deg, #dbe8ee, #9fb0c0); }
  .model-icon::after { content: "↻"; position: absolute; inset: 0; display: grid; place-items: center; color: var(--mint); font-size: 23px; font-weight: 800; }
  .probe-icon { width: 38px; height: 38px; border: 2px solid var(--blue); border-radius: 50%; }
  .probe-icon::after { content: "✓"; position: absolute; inset: 0; display: grid; place-items: center; color: var(--mint); font-weight: 900; }
  .flow-arrow { color: var(--blue); font-size: 22px; text-align: center; line-height: 1; }
  .mobile-evidence { display: grid; gap: 8px; text-align: center; }
  .mobile-evidence > span { height: 9px; border-radius: 999px; background: linear-gradient(90deg, #d97706, #cbd5e1, #0f766e); }
  .mobile-evidence > div { display: flex; justify-content: space-between; gap: 12px; color: var(--muted); text-align: left; }
  .mobile-evidence > div small:last-child { text-align: right; }
  .audit-legend { grid-template-columns: 1fr; }
  .audit-legend > span { grid-template-columns: auto 1fr; }
  .audit-legend small { grid-column: 2; }

  .manifold-primer { padding: 18px; }
  .manifold-visual .vector-button object { min-height: 205px; }
  .manifold-copy h3 { font-size: 28px; }
  .manifold-legend article { padding: 12px; }

  .focus-audit-mobile { margin-top: 0; padding: 10px; }
  .focus-audit-mobile .mobile-input-pair article { min-height: 74px; padding: 8px; }
  .focus-audit-mobile .mobile-probe { min-height: 62px; }
  .focus-audit-mobile .wave-icon,
  .focus-audit-mobile .model-icon,
  .focus-audit-mobile .probe-icon { transform: scale(.78); }
  .focus-insight-grid .focus-manifold .vector-button { width: 100%; }
  .focus-insight-grid .focus-manifold object { min-height: 195px; }
  .dialog-vector { height: min(76vh, 620px); }
}