:root {
  --paper: #f8f6f0;
  --paper-deep: #f0ece3;
  --surface: #fffdf8;
  --ink: #191814;
  --ink-soft: #383630;
  --muted: #716d65;
  --faint: #969087;
  --line: #ddd7cb;
  --line-strong: #cbc3b5;
  --accent: #8b312f;
  --accent-hover: #702522;
  --accent-soft: #f0dfd9;
  --accent-wash: #f7ebe6;
  --blue: #557b8f;
  --blue-soft: #dfe9ed;
  --green: #557a69;
  --green-soft: #e3eee7;
  --peach: #d88d69;
  --shadow-sm: 0 1px 2px rgba(32, 28, 20, 0.04), 0 10px 28px rgba(32, 28, 20, 0.05);
  --shadow-lg: 0 28px 70px rgba(33, 28, 20, 0.12);
  --sans: "DM Sans", "Inter", ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --serif: "Newsreader", "Iowan Old Style", Baskerville, "Times New Roman", serif;
  --page: min(1180px, calc(100vw - 48px));
  --article: 720px;
  --radius: 22px;
}

html[data-theme="dark"] {
  --paper: #171714;
  --paper-deep: #1f1e1a;
  --surface: #22211c;
  --ink: #f1eee6;
  --ink-soft: #d5d0c6;
  --muted: #aaa49a;
  --faint: #807a71;
  --line: #3b3832;
  --line-strong: #514c43;
  --accent: #d98677;
  --accent-hover: #ed9b8b;
  --accent-soft: #422b27;
  --accent-wash: #30231f;
  --blue: #8db4c5;
  --blue-soft: #26373e;
  --green: #8ab5a0;
  --green-soft: #24332c;
  --peach: #e69c78;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.25), 0 10px 28px rgba(0, 0, 0, 0.18);
  --shadow-lg: 0 28px 70px rgba(0, 0, 0, 0.4);
}

*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 0%, rgba(139, 49, 47, 0.06), transparent 26rem),
    var(--paper);
  font-family: var(--serif);
  font-size: 19px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--accent-soft); color: var(--ink); }

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
button, input { font: inherit; color: inherit; }
button { background: none; border: 0; cursor: pointer; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  z-index: 200;
  top: 12px;
  left: 12px;
  padding: 8px 12px;
  border-radius: 8px;
  color: #fff;
  background: var(--accent);
  font: 600 13px/1 var(--sans);
  text-decoration: none;
  transform: translateY(-160%);
}
.skip-link:focus { transform: none; }

.reading-progress {
  position: fixed;
  z-index: 120;
  inset: 0 0 auto;
  height: 2px;
  pointer-events: none;
}
.reading-progress span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--accent);
}

.site-header {
  position: sticky;
  z-index: 80;
  top: 0;
  font-family: var(--sans);
  transition: background 180ms ease, border-color 180ms ease;
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled {
  border-bottom-color: var(--line);
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(16px) saturate(1.2);
}

.site-nav {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  width: var(--page);
  min-height: 72px;
  margin: 0 auto;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  justify-self: start;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-decoration: none;
  font-size: 13px;
}
.wordmark-mark {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border: 1.5px solid var(--ink);
  border-radius: 50%;
  font-family: var(--serif);
  font-weight: 550;
  letter-spacing: 0;
}

.nav-center {
  display: flex;
  gap: 22px;
  font-size: 14px;
  color: var(--ink-soft);
}
.nav-center a { text-decoration: none; }
.nav-center a:hover { color: var(--ink); }

.nav-actions {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 8px;
}

.theme-toggle {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
}
.theme-toggle svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 1.6; }
html[data-theme="dark"] .sun-icon,
html[data-theme="light"] .moon-icon { display: none; }

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  gap: 28px 48px;
  align-items: start;
  width: var(--page);
  margin: 28px auto 0;
  padding: 18px 0 10px;
}

.hero-title {
  grid-column: 1 / -1;
  margin: 0;
  max-width: none;
  font-size: clamp(36px, 4.6vw, 56px);
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1.15;
  text-wrap: balance;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  color: var(--accent);
  font: 600 12px/1 var(--sans);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.eyebrow span {
  width: 28px;
  height: 1px;
  background: var(--accent);
}

h1 {
  margin: 0;
  font-size: clamp(34px, 4.4vw, 52px);
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1.12;
}
h1 em,
.hero-title em {
  font-style: italic;
  font-weight: 500;
  color: var(--accent);
}

.hero-badges {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-top: 16px;
  margin-bottom: 4px;
  font-family: var(--sans);
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none;
}
.hero-badge.is-live {
  border-color: color-mix(in srgb, var(--accent) 35%, var(--line));
  background: var(--accent-wash);
  color: var(--accent);
}
.hero-badge.is-live:hover { color: var(--accent-hover); }
.hero-badge.is-soon {
  border-style: dashed;
  color: var(--faint);
  cursor: default;
}

.hero-highlight {
  max-width: 40rem;
  margin-top: 18px;
  padding: 16px 18px;
  border: 1px solid color-mix(in srgb, var(--accent) 22%, var(--line));
  border-radius: 16px;
  background:
    linear-gradient(135deg, rgba(139, 49, 47, 0.08), rgba(139, 49, 47, 0.02) 48%, rgba(85, 123, 143, 0.05)),
    var(--accent-wash);
  box-shadow: inset 0 1px 0 rgba(255, 253, 248, 0.65);
}
.hero-highlight p {
  margin: 0;
  color: var(--ink);
  font-size: 17.5px;
  line-height: 1.5;
}
.hero-highlight p { margin: 0; }
.hero-highlight p + p { margin-top: 10px; }
.hero-highlight strong { font-weight: 650; color: var(--accent); }
.hero-highlight em { font-style: italic; }

.hero-solution { margin-top: 20px; max-width: 38rem; }
.hero-kicker {
  margin: 0;
  color: var(--accent);
  font-size: 22px;
  font-weight: 550;
  letter-spacing: -0.02em;
}

.hero-dek {
  margin: 10px 0 0;
  color: var(--ink-soft);
  font-size: 18.5px;
  line-height: 1.45;
}

.hero-points {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}
.hero-points li {
  position: relative;
  padding-left: 1.05em;
  color: var(--ink-soft);
  font-size: 16.5px;
  line-height: 1.45;
}
.hero-points li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}
.hero-points strong { color: var(--ink); font-weight: 650; }
.hero-points strong:first-child { color: var(--accent); }

.byline {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  margin-top: 22px;
  color: var(--muted);
  font: 500 14px/1.4 var(--sans);
}
.byline i { font-style: normal; color: var(--faint); }

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 999px;
  font: 600 14.5px/1 var(--sans);
  text-decoration: none;
}
.button svg { width: 15px; height: 15px; fill: none; stroke: currentColor; stroke-width: 1.7; }
.button-primary { color: #fffdf8; background: var(--accent); }
.button-primary:hover { background: var(--accent-hover); }
html[data-theme="dark"] .button-primary { color: #211411; }
.button-secondary {
  border: 1px solid var(--line-strong);
  background: var(--surface);
}
.button-secondary:hover { border-color: var(--ink); }
.button-soon {
  border: 1px dashed var(--line-strong);
  background: transparent;
  color: var(--muted);
  cursor: default;
  user-select: none;
}

.lab {
  padding: 18px 18px 16px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--surface);
  box-shadow: var(--shadow-lg);
}
.lab-header, .lab-footer {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--faint);
  font: 600 13px/1 var(--sans);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.lab-header span:first-child {
  color: var(--muted);
  font-size: 14px;
  letter-spacing: 0.14em;
}
.live-dot { display: inline-flex; align-items: center; gap: 7px; color: var(--green); }
.live-dot i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
}

.lab-video-frame {
  margin: 10px 0 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--paper-deep);
}
.lab-video {
  display: block;
  width: 100%;
  height: auto;
  object-fit: contain;
  vertical-align: middle;
  background: #111;
}

.lab-note {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  margin-top: 14px;
  padding: 12px 14px;
  border-radius: 14px;
  background: var(--accent-wash);
  color: var(--ink-soft);
  font-size: 14.5px;
  line-height: 1.45;
}
.lab-note strong { color: var(--accent); font-weight: 600; }
.lab-note svg {
  flex: 0 0 auto;
  width: 22px;
  margin-top: 4px;
  fill: none;
  stroke: var(--accent);
  stroke-width: 1.6;
}

.lab-footer { margin-top: 14px; letter-spacing: 0.08em; }
.legend-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 6px;
  border-radius: 50%;
  background: var(--blue);
}
.legend-dot.update { background: var(--accent); }

.metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  width: var(--page);
  margin: 54px auto 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.section .metrics {
  width: 100%;
  margin: 22px 0 8px;
}
.metric { padding: 28px 8px 26px; text-align: center; }
.metric + .metric { border-left: 1px solid var(--line); }
.metric strong {
  display: block;
  color: var(--accent);
  font-size: clamp(40px, 4vw, 56px);
  font-weight: 500;
  letter-spacing: -0.04em;
  line-height: 1;
}
.metric span {
  display: block;
  margin-top: 10px;
  color: var(--muted);
  font: 600 12px/1.35 var(--sans);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.story {
  width: var(--page);
  margin: 72px auto 10px;
}
.story h2, .section h2, .close h2, .citation h2 {
  margin: 0;
  font-size: clamp(36px, 4vw, 52px);
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1.05;
}
.story ol {
  display: grid;
  gap: 0;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}
.story li {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 18px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}
.story li span {
  color: var(--accent);
  font: 550 18px/1 var(--serif);
}
.story li p { margin: 0; max-width: 46rem; }

.layout {
  display: grid;
  grid-template-columns: 210px minmax(0, var(--article));
  gap: 56px;
  justify-content: center;
  width: var(--page);
  margin: 28px auto 0;
}

.toc {
  position: sticky;
  top: 96px;
  align-self: start;
  font-family: var(--sans);
}
.toc p {
  margin: 0 0 12px;
  color: var(--faint);
  font-size: 12px;
  font-weight: 650;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.toc ol { margin: 0; padding: 0; list-style: none; }
.toc a {
  display: block;
  padding: 7px 0;
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
}
.toc a:hover { color: var(--ink); }

.section { padding: 54px 0 10px; }
.section-kicker {
  margin: 0 0 8px;
  color: var(--faint);
  font: 600 12px/1 var(--sans);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.section h2 { margin-bottom: 8px; }
.story-hook {
  margin: 0 0 18px;
  max-width: 38em;
  color: var(--ink-soft);
  font: italic 400 20px/1.45 var(--serif);
}
.figure-kicker {
  margin: 0 0 10px;
  color: var(--faint);
  font: 600 12px/1 var(--sans);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.lede {
  margin: 14px 0 0;
  color: var(--ink-soft);
  font-size: 22px;
  line-height: 1.45;
}
.section p { margin: 16px 0 0; }
.section h3 {
  margin: 34px 0 0;
  font-size: 28px;
  font-weight: 550;
  letter-spacing: -0.02em;
}

.pull {
  margin: 28px 0 0;
  padding: 18px 0 18px 18px;
  border-left: 2px solid var(--accent);
  color: var(--ink);
  font-size: 22px;
  line-height: 1.4;
}
.pull span {
  display: block;
  margin-bottom: 6px;
  color: var(--accent);
  font: 650 11px/1 var(--sans);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.formula {
  margin: 26px 0 0;
  padding: 22px 22px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}
.formula p { margin: 0; }
.formula .eq {
  margin-top: 8px;
  font-size: 26px;
  letter-spacing: -0.02em;
  line-height: 1.35;
}
.formula figcaption {
  margin-top: 10px;
  color: var(--muted);
  font: 400 14.5px/1.5 var(--sans);
}
.formula .syms {
  margin: 14px 0 0;
  display: grid;
  gap: 6px 18px;
}
.formula .syms div {
  display: grid;
  grid-template-columns: minmax(7.5rem, auto) 1fr;
  gap: 10px;
  align-items: baseline;
}
.formula .syms dt {
  margin: 0;
  color: var(--ink);
  font: 550 14px/1.4 var(--sans);
  font-variant-numeric: tabular-nums;
}
.formula .syms dd {
  margin: 0;
  color: var(--muted);
  font: 400 14px/1.45 var(--sans);
}

.figure {
  margin: 28px 0 0;
}
.figure-frame {
  overflow: hidden;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
}
html[data-theme="dark"] .figure-frame { background: #f4f1ea; }
.figure-frame img { width: 100%; }
.figure-compact {
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}
.figure-compact .figure-frame {
  padding: 6px;
}
.figure figcaption {
  margin-top: 10px;
  color: var(--muted);
  font: 400 14px/1.5 var(--sans);
}

.method-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px 28px;
  margin-top: 28px;
  align-items: start;
}
.panel-kicker {
  margin: 0 0 10px;
  color: var(--faint);
  font: 600 12px/1 var(--sans);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.method-split .steps,
.method-split .roles { margin-top: 0; }
.method-split .step-card {
  grid-template-columns: 36px 1fr;
  padding: 14px 14px 14px 12px;
}
.method-split .step-card b { font-size: 20px; }
.method-split .step-card h3 { font-size: 17px; }
.method-split .step-card p,
.method-split .role p { font-size: 15px; line-height: 1.5; }

.steps {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}
.step-card {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 12px;
  padding: 16px 16px 16px 14px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface);
}
.step-card b {
  color: var(--accent);
  font: 500 22px/1 var(--serif);
}
.step-card h3 { margin: 0; font-size: 20px; }
.step-card p { margin: 6px 0 0; color: var(--ink-soft); font-size: 17px; }

.takeaways {
  display: grid;
  gap: 12px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}
.takeaways li {
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 12px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface);
}
.takeaways span {
  color: var(--accent);
  font: 500 18px/1.2 var(--serif);
}
.takeaways strong {
  display: block;
  font-size: 18px;
  font-weight: 550;
  letter-spacing: -0.02em;
}
.takeaways p {
  margin: 6px 0 0;
  color: var(--ink-soft);
  font-size: 16px;
}

.roles {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}
.role {
  padding: 16px 18px 18px;
  border-radius: 16px;
  background: var(--paper-deep);
}
.role strong {
  display: block;
  margin-bottom: 4px;
  font-size: 18px;
}
.role p { margin: 0; color: var(--ink-soft); font-size: 16.5px; }
.role.student { background: var(--blue-soft); }
.role.analyzer { background: var(--green-soft); }
.role.teacher { background: var(--accent-wash); }

.seg {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 22px;
  font-family: var(--sans);
}
.seg button {
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
}
.seg button[aria-pressed="true"] {
  border-color: transparent;
  color: #fffdf8;
  background: var(--ink);
}
html[data-theme="dark"] .seg button[aria-pressed="true"] { color: #171714; }

.chart {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
  margin-top: 18px;
  padding: 18px 12px 12px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--surface);
}
.chart-col { display: flex; flex-direction: column; align-items: center; gap: 8px; }
.chart-bars {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 4px;
  width: 100%;
  height: 168px;
}
.chart-bars span {
  position: relative;
  width: 18%;
  height: 100%;
  color: var(--faint);
  font: 600 10px/1 var(--sans);
  text-align: center;
}
.chart-bars i {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  display: block;
  height: var(--h);
  max-height: 78%;
  min-height: 3px;
  border-radius: 4px 4px 1px 1px;
}
.b1 { background: var(--accent); }
.b2 { background: repeating-linear-gradient(-45deg, var(--line-strong), var(--line-strong) 2px, transparent 2px, transparent 4px); }
.b3 { background: var(--blue); }
.b4 { background: var(--green); }
.chart-col em {
  color: var(--muted);
  font: 600 12px/1.2 var(--sans);
  font-style: normal;
  text-align: center;
}
.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 16px;
  margin-top: 12px;
  color: var(--muted);
  font: 500 13px/1.3 var(--sans);
}
.legend i {
  display: inline-block;
  width: 10px;
  height: 10px;
  margin-right: 6px;
  border-radius: 2px;
  vertical-align: -1px;
}

.table-wrap {
  margin-top: 18px;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface);
}
table {
  width: 100%;
  border-collapse: collapse;
  font: 500 14px/1.35 var(--sans);
}
th, td {
  padding: 11px 12px;
  border-bottom: 1px solid var(--line);
  text-align: right;
  white-space: nowrap;
}
th:first-child, td:first-child { text-align: left; }
th {
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
tr:last-child td { border-bottom: 0; }
tbody tr.best td { color: var(--accent); font-weight: 700; }

.paper-table {
  font-size: 12.5px;
  min-width: 920px;
}
.paper-table th,
.paper-table td {
  padding: 7px 6px;
}
.paper-table thead th {
  vertical-align: bottom;
  text-align: center;
  line-height: 1.25;
  letter-spacing: 0.04em;
}
.paper-table thead th:first-child,
.paper-table tbody td:first-child {
  text-align: left;
  min-width: 7.75rem;
  white-space: nowrap;
  background: var(--surface);
}
.paper-table tbody td {
  text-align: center;
  font-variant-numeric: tabular-nums;
}
.paper-table tr.group td {
  padding: 10px 6px 6px;
  border-bottom-color: var(--line-strong);
  color: var(--faint);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-align: left;
  text-transform: uppercase;
  background: var(--paper-deep);
  min-width: 0;
}
.paper-table tr.muted td {
  color: var(--muted);
  font-weight: 500;
  background: color-mix(in srgb, var(--paper-deep) 55%, var(--surface));
}
.paper-table tr.best td:first-child {
  background: var(--surface);
}
.paper-table .gain {
  display: block;
  color: var(--blue);
  font-size: 10px;
  font-weight: 650;
  letter-spacing: 0.02em;
}
.note {
  margin-top: 8px;
  color: var(--faint);
  font: 400 13px/1.45 var(--sans);
}

.stat-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 22px;
}
.stat {
  padding: 16px 14px 14px;
  border-radius: 16px;
  background: var(--paper-deep);
}
.stat b {
  display: block;
  color: var(--accent);
  font-size: 28px;
  font-weight: 550;
  letter-spacing: -0.03em;
}
.stat span { display: block; margin-top: 4px; color: var(--muted); font: 500 13px/1.35 var(--sans); }

details {
  margin-top: 14px;
  border-top: 1px solid var(--line);
}
summary {
  padding: 14px 0;
  color: var(--ink-soft);
  font: 600 15px/1.4 var(--sans);
  cursor: pointer;
}
details p, details li { font-size: 17px; }
details ul { margin: 0 0 12px; padding-left: 1.1em; }

.figure-fold {
  margin-top: 26px;
  border-top: 0;
}
.figure-fold > summary {
  padding: 0;
  color: var(--faint);
  font: 600 12px/1 var(--sans);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.figure-fold .credit-figure { margin-top: 14px; }

.pair {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 12px;
  margin-top: 16px;
}
.pair .figure { margin: 0; }

.analysis-row {
  display: grid;
  grid-template-columns: 1.55fr 1fr;
  gap: 22px;
  align-items: start;
  margin-top: 26px;
}
.analysis-copy h4 {
  margin: 0;
  font-size: 22px;
  font-weight: 550;
  letter-spacing: -0.02em;
}
.analysis-copy p {
  margin: 10px 0 0;
  color: var(--ink-soft);
  font-size: 17px;
}
.analysis-copy > p:first-child {
  margin-top: 0;
}
.analysis-figure {
  margin: 0;
}
.analysis-figure .figure-frame {
  padding: 4px;
}

.defect-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 28px;
}
.defect-card {
  margin: 0;
  padding: 18px 18px 16px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--surface);
}
.defect-card--silence {
  border-color: color-mix(in srgb, var(--accent) 28%, var(--line));
  background: linear-gradient(180deg, var(--accent-wash), var(--surface) 42%);
}
.defect-card--coarse {
  border-color: color-mix(in srgb, var(--blue) 28%, var(--line));
  background: linear-gradient(180deg, var(--blue-soft), var(--surface) 42%);
}
.defect-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  color: var(--muted);
  font: 650 12px/1 var(--sans);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.defect-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex: 0 0 auto;
}
.defect-dot.silence { background: var(--accent); }
.defect-dot.coarse { background: var(--blue); }
.defect-card h3 {
  margin: 12px 0 0;
  font-size: 24px;
  font-weight: 550;
  letter-spacing: -0.02em;
}
.defect-issue {
  margin: 10px 0 0;
  color: var(--ink-soft);
  font-size: 16.5px;
  line-height: 1.45;
}
.defect-issue strong { color: var(--ink); font-weight: 650; }
.defect-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 16px 0 0;
  padding: 12px 0 0;
  border-top: 1px solid color-mix(in srgb, var(--line) 80%, transparent);
}
.defect-stats div { margin: 0; }
.defect-stats dt {
  margin: 0;
  color: var(--ink);
  font: 700 28px/1.05 var(--sans);
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
}
.defect-card--silence .defect-stats dt { color: var(--accent); }
.defect-card--coarse .defect-stats dt { color: var(--blue); }
.defect-stats dd {
  margin: 4px 0 0;
  color: var(--muted);
  font: 500 13.5px/1.35 var(--sans);
}
.defect-meta {
  margin: 14px 0 0;
  color: var(--faint);
  font: 500 13px/1.4 var(--sans);
}

.finding-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 26px;
}
.finding-card {
  margin: 0;
  padding: 18px 16px 16px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--surface);
}
.finding-card:nth-child(1) {
  border-color: color-mix(in srgb, var(--accent) 26%, var(--line));
  background: linear-gradient(180deg, var(--accent-wash), var(--surface) 46%);
}
.finding-card:nth-child(2) {
  border-color: color-mix(in srgb, var(--blue) 26%, var(--line));
  background: linear-gradient(180deg, var(--blue-soft), var(--surface) 46%);
}
.finding-card:nth-child(3) {
  border-color: color-mix(in srgb, var(--green) 26%, var(--line));
  background: linear-gradient(180deg, var(--green-soft), var(--surface) 46%);
}
.finding-kicker {
  margin: 0;
  color: var(--muted);
  font: 650 12px/1 var(--sans);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.finding-card h3 {
  margin: 10px 0 0;
  font-size: 22px;
  font-weight: 550;
  letter-spacing: -0.02em;
}
.finding-card p {
  margin: 10px 0 0;
  color: var(--ink-soft);
  font-size: 15.5px;
  line-height: 1.45;
}
.probe-figures {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 22px;
  align-items: stretch;
}
.probe-figures .figure {
  margin: 0;
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.probe-figures .figure-frame {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}
.probe-figures .figure-frame img {
  width: 100%;
  height: auto;
  object-fit: contain;
}

.credit-figure { margin-top: 22px; }
.fig-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 12px;
}
.fig-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--ink-soft);
  font: 550 13px/1 var(--sans);
}
.fig-badge i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex: 0 0 auto;
}
.fig-badge--silence i { background: var(--accent); }
.fig-badge--coarse i { background: var(--blue); }
.credit-figure .figure-frame { padding: 6px; }
.pull strong { font-weight: 650; color: var(--ink); }

.ablation-card {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface);
  overflow: hidden;
}
.ablation-table {
  width: 100%;
  min-width: 0;
  margin: 0;
  font: 550 14px/1.35 var(--sans);
}
.ablation-table caption {
  padding: 12px 14px 8px;
  color: var(--muted);
  font: 650 12px/1.3 var(--sans);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-align: left;
  caption-side: top;
}
.ablation-table th,
.ablation-table td {
  padding: 9px 14px;
  border-bottom: 1px solid var(--line);
  text-align: right;
  font-variant-numeric: tabular-nums;
}
.ablation-table th:first-child,
.ablation-table td:first-child {
  text-align: left;
}
.ablation-table thead th {
  color: var(--faint);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: var(--paper-deep);
}
.ablation-table tbody tr:last-child td {
  border-bottom: 0;
}
.ablation-table tr.best td {
  background: color-mix(in srgb, var(--blue) 10%, var(--surface));
}
.ablation-table tr.neg td {
  color: var(--muted);
}

.ablation-inline {
  margin: 0;
  max-width: none;
}
.ablation-inline .ablation-table {
  font-size: 13.5px;
}
.ablation-inline .ablation-table caption {
  padding-bottom: 6px;
}

.close, .citation { width: min(860px, var(--page)); margin: 64px auto 0; }
.close h2 { font-size: clamp(32px, 4vw, 46px); }
.closing-grid {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}
.closing-card {
  margin: 0;
  padding: 18px 18px 16px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--surface);
}
.closing-card:nth-child(1) {
  border-color: color-mix(in srgb, var(--accent) 24%, var(--line));
  background: linear-gradient(180deg, var(--accent-wash), var(--surface) 48%);
}
.closing-card:nth-child(2) {
  border-color: color-mix(in srgb, var(--blue) 24%, var(--line));
  background: linear-gradient(180deg, var(--blue-soft), var(--surface) 48%);
}
.closing-card:nth-child(3) {
  border-color: color-mix(in srgb, var(--green) 24%, var(--line));
  background: linear-gradient(180deg, var(--green-soft), var(--surface) 48%);
}
.closing-kicker {
  margin: 0;
  color: var(--muted);
  font: 650 12px/1 var(--sans);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.closing-card h3 {
  margin: 10px 0 0;
  font-size: 22px;
  font-weight: 550;
  letter-spacing: -0.02em;
}
.closing-card p {
  margin: 10px 0 0;
  color: var(--ink-soft);
  font: 400 17px/1.5 var(--serif);
}
.closing-card strong { color: var(--ink); font-weight: 650; }
.citation { padding-bottom: 28px; }
.bib-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 18px;
}
.bib-head p {
  margin: 0;
  color: var(--faint);
  font: 650 12px/1 var(--sans);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.copy {
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--surface);
  font: 650 13px/1 var(--sans);
}
pre {
  margin: 12px 0 0;
  padding: 18px 18px 16px;
  overflow-x: auto;
  border-radius: 16px;
  background: var(--ink);
  color: #f6f1e8;
  font: 400 13.5px/1.55 ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
}
html[data-theme="dark"] pre { background: #10100e; border: 1px solid var(--line); }

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  width: var(--page);
  margin: 28px auto 0;
  padding: 22px 0 36px;
  border-top: 1px solid var(--line);
  color: var(--faint);
  font: 500 13px/1.4 var(--sans);
}
.site-footer a { text-decoration: none; }
.site-footer a:hover { color: var(--ink); }

.js .reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 640ms ease, transform 640ms ease;
}
.js .reveal.is-visible { opacity: 1; transform: none; }

@media (max-width: 1040px) {
  .layout { grid-template-columns: 1fr; gap: 8px; }
  .toc {
    position: static;
    display: flex;
    flex-wrap: wrap;
    gap: 8px 18px;
    align-items: baseline;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--line);
  }
  .toc p { margin: 0; }
  .toc ol { display: flex; flex-wrap: wrap; gap: 4px 16px; }
}

@media (max-width: 860px) {
  .hero, .pair, .analysis-row, .stat-row, .method-split, .defect-grid, .finding-grid, .probe-figures { grid-template-columns: 1fr; }
  .hero-title, h1 { font-size: clamp(32px, 8vw, 44px); }
}

@media (max-width: 720px) {
  .metrics { grid-template-columns: 1fr; }
  .metric + .metric { border-left: 0; border-top: 1px solid var(--line); }
  .nav-center { display: none; }
  .site-nav { grid-template-columns: 1fr auto; }
  .chart { grid-template-columns: 1fr; }
  .chart-col { align-items: stretch; }
  .chart-bars { height: 92px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
}