/* Hallmark · genre: editorial · macrostructure: Stat-Led · theme: custom (Periospot teal anchor)
 * nav: N9 edge-aligned · footer: Ft4 dense colophon · enrichment: none
 * pre-emit critique: P4 H5 E4 S5 R5 V4
 */

* { box-sizing: border-box; }

html, body { overflow-x: clip; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
}

a { color: var(--color-ink); text-decoration-color: var(--color-rule-2); text-underline-offset: 3px; }
a:hover { text-decoration-color: var(--color-accent); color: var(--color-accent); }

:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: var(--radius-input);
}

::selection { background: oklch(85% 0.05 190); }

.skip-link {
  position: absolute;
  left: var(--space-sm);
  top: -4rem;
  z-index: 50;
  padding: var(--space-2xs) var(--space-sm);
  background: var(--color-ink);
  color: var(--color-paper);
  transition: top var(--dur-short) var(--ease-out);
}

.skip-link:focus-visible { top: var(--space-sm); color: var(--color-paper); }

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 60;
  background: var(--color-accent);
  transform-origin: 0 50%;
  transform: scaleX(0);
}

.hero-figure { will-change: transform, opacity; }

/* ---------- N9 masthead: wordmark left, one action right ---------- */

.masthead {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-md);
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--space-md) clamp(1rem, 4vw, 3rem) var(--space-sm);
  border-bottom: var(--rule-strong);
}

.wordmark {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-md);
  letter-spacing: 0.01em;
  text-decoration: none;
}

.masthead-link {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  text-decoration: none;
  border-bottom: 1px solid var(--color-rule-2);
  padding-bottom: 2px;
  white-space: nowrap;
}

/* ---------- Stat-Led hero ---------- */

.stat-hero {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--space-2xl) clamp(1rem, 4vw, 3rem) var(--space-xl);
}

.hero-figure {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: var(--text-figure);
  line-height: 1;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
}

.hero-figure .unit {
  font-size: 0.45em;
  color: var(--color-ink-2);
  margin-left: 0.06em;
}

.qualifier {
  max-width: 30ch;
  margin: var(--space-md) 0 0;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-display);
  line-height: 1.12;
  letter-spacing: -0.005em;
  overflow-wrap: anywhere;
  min-width: 0;
}

.hero-meta {
  max-width: var(--measure);
  margin: var(--space-md) 0 0;
  color: var(--color-ink-2);
  font-size: var(--text-md);
}

.cta-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2xs);
  min-height: 44px;
  margin-top: var(--space-lg);
  padding: 0.55em 1.1em;
  border: 1.5px solid var(--color-ink);
  border-radius: var(--radius-input);
  background: transparent;
  color: var(--color-ink);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  text-decoration: none;
  white-space: nowrap;
  transition: background var(--dur-short) var(--ease-out), color var(--dur-short) var(--ease-out);
}

.cta-chip:hover { background: var(--color-ink); color: var(--color-paper); }
.cta-chip:active { transform: translateY(1px); }

/* T4 stat strip — four real numbers over a hairline */

.stat-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-2xl);
  border-top: var(--rule-hairline);
  padding-top: var(--space-md);
}

.metric strong {
  display: block;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: var(--text-xl);
  font-variant-numeric: tabular-nums;
}

.metric span {
  display: block;
  margin-top: var(--space-3xs);
  color: var(--color-ink-2);
  font-size: var(--text-sm);
}

/* ---------- sections: hairline-ruled report blocks ---------- */

.section {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--space-xl) clamp(1rem, 4vw, 3rem);
  border-top: var(--rule-hairline);
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  justify-content: space-between;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

h1, h2, h3 { font-family: var(--font-display); font-weight: 600; font-style: normal; }

h2 {
  margin: 0;
  font-size: var(--text-2xl);
  line-height: 1.15;
  letter-spacing: -0.005em;
}

h3 { margin: 0 0 var(--space-xs); font-size: var(--text-md); }

.section-note {
  max-width: var(--measure);
  margin: var(--space-2xs) 0 0;
  color: var(--color-ink-2);
  font-size: var(--text-sm);
}

.prose { max-width: var(--measure); color: var(--color-ink); }
.prose p { margin: var(--space-sm) 0 0; }
.muted { color: var(--color-ink-2); }

/* takeaway: asymmetric two-column prose, no card */

.intro-grid {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
  gap: var(--space-2xl);
  align-items: start;
}

.aside-note {
  border-left: 2px solid var(--color-accent);
  padding-left: var(--space-md);
  font-size: var(--text-sm);
  color: var(--color-ink-2);
}

.aside-note strong { display: block; color: var(--color-ink); margin-bottom: var(--space-3xs); }

/* ---------- controls ---------- */

.control-row { display: flex; flex-wrap: wrap; gap: var(--space-sm); align-items: end; }

label {
  display: grid;
  gap: var(--space-3xs);
  color: var(--color-ink-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

select, input[type="search"] {
  min-height: 44px;
  min-width: 170px;
  border: 1px solid var(--color-rule-2);
  border-radius: var(--radius-input);
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  text-transform: none;
  letter-spacing: 0;
  padding: var(--space-2xs) var(--space-xs);
  transition: border-color var(--dur-short) var(--ease-out);
}

select:hover, input[type="search"]:hover { border-color: var(--color-ink-2); }
select:disabled, input:disabled { opacity: 0.5; cursor: not-allowed; }

/* ---------- leaderboard ---------- */

.leaderboard-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(300px, 0.9fr);
  gap: var(--space-2xl);
  align-items: start;
}

.leaderboard-rows { border-top: var(--rule-strong); }

.leader-row {
  display: grid;
  grid-template-columns: minmax(200px, 1fr) minmax(140px, 1.3fr) 110px;
  gap: var(--space-sm);
  align-items: center;
  width: 100%;
  padding: var(--space-sm) var(--space-2xs);
  border: 0;
  border-bottom: var(--rule-hairline);
  background: transparent;
  color: var(--color-ink);
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: background var(--dur-short) var(--ease-out);
}

.leader-row:hover { background: var(--color-paper-2); }
.leader-row.is-active { background: var(--color-paper-2); box-shadow: inset 2px 0 0 var(--color-accent); }

.model-name { display: flex; gap: var(--space-xs); align-items: center; min-width: 0; }

.logo {
  width: 30px;
  height: 30px;
  object-fit: contain;
  flex: 0 0 auto;
  background: #fff;
  border: 1px solid var(--color-rule);
  border-radius: 50%;
  padding: 4px;
}

.model-name strong, .model-name span { display: block; line-height: 1.3; }
.model-name strong { font-size: var(--text-sm); font-weight: 600; }
.model-name span { color: var(--color-ink-2); font-size: var(--text-xs); }

.bar-track {
  position: relative;
  height: 14px;
  background: var(--color-paper-2);
  border: 1px solid var(--color-rule);
  overflow: hidden;
}

.bar-fill {
  display: block;
  height: 100%;
  transition: width 480ms var(--ease-out);
}

.score { text-align: right; font-variant-numeric: tabular-nums; }
.score strong { display: block; font-family: var(--font-mono); font-weight: 500; font-size: var(--text-md); }
.score span { color: var(--color-ink-2); font-size: var(--text-xs); font-family: var(--font-mono); }

.detail-card {
  position: sticky;
  top: var(--space-md);
  border: var(--rule-hairline);
  border-top: var(--rule-strong);
  padding: var(--space-md);
  background: var(--color-paper);
}

.detail-list { display: grid; gap: var(--space-2xs); margin-top: var(--space-sm); }

.detail-list div {
  display: flex;
  justify-content: space-between;
  gap: var(--space-sm);
  padding-bottom: var(--space-2xs);
  border-bottom: var(--rule-hairline);
  font-size: var(--text-sm);
}

.detail-list div:last-child { border-bottom: 0; }
.detail-list span { color: var(--color-ink-2); }
.detail-list strong { font-family: var(--font-mono); font-weight: 500; font-variant-numeric: tabular-nums; text-align: right; }

/* ---------- domain matrix ---------- */

.matrix-wrap { overflow-x: auto; border-top: var(--rule-strong); }

.matrix { width: 100%; min-width: 840px; border-collapse: collapse; }

.matrix th, .matrix td {
  padding: var(--space-2xs) var(--space-2xs);
  border-bottom: var(--rule-hairline);
  text-align: center;
  font-size: var(--text-sm);
}

.matrix thead th {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: var(--text-xs);
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--color-ink-2);
}

.matrix th:first-child, .matrix td:first-child {
  text-align: left;
  position: sticky;
  left: 0;
  background: var(--color-paper);
  z-index: 1;
}

.heat {
  font-family: var(--font-mono);
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  color: #fff;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 360ms var(--ease-out), transform 360ms var(--ease-out);
}

.heat.is-in { opacity: 1; transform: none; }

/* ---------- question explorer ---------- */

.question-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-md);
}

.question-card {
  padding: var(--space-md) 0 var(--space-sm);
  border-top: var(--rule-hairline);
}

.question-card p { margin: var(--space-xs) 0 0; max-width: 58ch; }

.chips { display: flex; flex-wrap: wrap; gap: var(--space-xs); }

.chip {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--color-ink-2);
  border-bottom: 1px solid var(--color-rule-2);
  padding-bottom: 1px;
}

.outcome-dots { display: flex; flex-wrap: wrap; gap: var(--space-2xs); margin-top: var(--space-sm); }

.dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 1px solid var(--color-paper);
  box-shadow: 0 0 0 1px var(--color-rule-2);
}

.dot.correct { background: var(--color-ok); }
.dot.wrong { background: var(--color-bad); }
.dot.refusal { background: var(--color-warn); }

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-top: var(--space-md);
  color: var(--color-ink-2);
  font-size: var(--text-xs);
  font-family: var(--font-mono);
}

.legend span { display: inline-flex; align-items: center; gap: var(--space-2xs); }

/* ---------- error analysis ---------- */

.error-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: var(--space-2xl);
  align-items: start;
}

.error-card > p { max-width: 52ch; color: var(--color-ink-2); font-size: var(--text-sm); margin: 0 0 var(--space-sm); }

.error-item {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: var(--space-sm);
  padding: var(--space-sm) 0;
  border-bottom: var(--rule-hairline);
}

.error-item:last-child { border-bottom: 0; }
.error-item p { margin: var(--space-3xs) 0 var(--space-2xs); color: var(--color-ink-2); font-size: var(--text-sm); }

.error-count {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: var(--text-xl);
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
}

.flag-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-sm);
  padding: var(--space-xs) 0;
  border-bottom: var(--rule-hairline);
  font-size: var(--text-sm);
}

.flag-row:last-child { border-bottom: 0; }

/* ---------- judges ---------- */

.judge-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-2xl); }

.judge-card { border-top: var(--rule-strong); padding-top: var(--space-sm); }

.judge-card strong {
  display: block;
  margin-top: var(--space-2xs);
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: var(--text-figure);
  font-size: clamp(2.4rem, 1.6rem + 3vw, 4rem);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.judge-card span:last-child { display: block; margin-top: var(--space-2xs); color: var(--color-ink-2); font-size: var(--text-sm); }

.judge-table-wrap { margin-top: var(--space-lg); overflow-x: auto; }

.judge-table { width: 100%; border-collapse: collapse; }

.judge-table th, .judge-table td {
  padding: var(--space-2xs) var(--space-xs);
  border-bottom: var(--rule-hairline);
  text-align: right;
  font-variant-numeric: tabular-nums;
  font-size: var(--text-sm);
}

.judge-table td { font-family: var(--font-mono); }

.judge-table thead th {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--color-ink-2);
}

.judge-table th:first-child, .judge-table td:first-child { text-align: left; font-family: var(--font-body); }

/* ---------- infographic + resources ---------- */

.infographic {
  display: block;
  width: 100%;
  height: auto;
  border: var(--rule-hairline);
  opacity: 0;
  transform: translateY(28px) scale(0.95);
  transition: opacity 760ms var(--ease-out), transform 760ms var(--ease-out);
}

.infographic.is-in { opacity: 1; transform: none; }

.reproduce {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
  gap: var(--space-2xl);
  align-items: start;
}

.reproduce .prose p { color: var(--color-ink-2); }

.resource-list { margin: 0; padding: 0; list-style: none; border-top: var(--rule-strong); }

.resource-list a {
  display: flex;
  justify-content: space-between;
  gap: var(--space-sm);
  padding: var(--space-xs) var(--space-3xs);
  border-bottom: var(--rule-hairline);
  text-decoration: none;
  font-size: var(--text-sm);
  transition: background var(--dur-short) var(--ease-out);
}

.resource-list a:hover { background: var(--color-paper-2); color: var(--color-ink); }
.resource-list a::after { content: "↗"; color: var(--color-ink-2); font-family: var(--font-mono); }

.citation-box { margin-top: var(--space-md); }

.citation-box .copy-btn {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  margin-bottom: var(--space-2xs);
  padding: 0.35em 0.9em;
  border: 1px solid var(--color-rule-2);
  border-radius: var(--radius-input);
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  cursor: pointer;
  transition: border-color var(--dur-short) var(--ease-out);
}

.citation-box .copy-btn:hover { border-color: var(--color-ink); }
.citation-box .copy-btn:active { transform: translateY(1px); }

pre {
  overflow-x: auto;
  margin: 0;
  padding: var(--space-sm);
  border: var(--rule-hairline);
  background: var(--color-paper-2);
  color: var(--color-ink);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.55;
}

/* ---------- Ft4 colophon ---------- */

.colophon {
  max-width: 1280px;
  margin: var(--space-xl) auto 0;
  padding: var(--space-lg) clamp(1rem, 4vw, 3rem) var(--space-2xl);
  border-top: var(--rule-strong);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.8;
  color: var(--color-ink-2);
}

.colophon a { color: inherit; }
.colophon a:hover { color: var(--color-accent); }

/* ---------- blog article ---------- */

.article {
  max-width: 760px;
  margin: 0 auto;
  padding: var(--space-2xl) clamp(1rem, 4vw, 3rem);
}

.article h1 {
  margin: 0;
  font-size: var(--text-display);
  line-height: 1.1;
  letter-spacing: -0.005em;
  overflow-wrap: anywhere;
  min-width: 0;
}

.article .lede { margin-top: var(--space-md); font-size: var(--text-lg); line-height: 1.5; color: var(--color-ink-2); }

.article section { margin-top: var(--space-xl); border-top: var(--rule-hairline); padding-top: var(--space-lg); }

.article p { max-width: var(--measure); }

.article .cta-chip { margin-top: var(--space-md); }

.article .post-links { margin-top: var(--space-sm); font-size: var(--text-sm); color: var(--color-ink-2); }

/* ---------- responsive ---------- */

@media (max-width: 60rem) {
  .leaderboard-layout, .error-layout, .reproduce, .intro-grid { grid-template-columns: 1fr; gap: var(--space-lg); }
  .detail-card { position: static; }
  .question-grid, .judge-grid { grid-template-columns: 1fr; }
  .stat-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .leader-row { grid-template-columns: minmax(0, 1fr) 86px; }
  .leader-row .bar-track { display: none; }
}

@media (max-width: 40rem) {
  .stat-strip { gap: var(--space-sm); }
  .masthead { flex-wrap: wrap; }
  .section-head { align-items: stretch; flex-direction: column; }
  select, input[type="search"] { width: 100%; }
  .control-row { width: 100%; }
  .control-row label { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .bar-fill { transition: none; }
  .heat { opacity: 1; transform: none; transition: none; }
  .infographic { opacity: 1; transform: none; transition: none; }
  .scroll-progress { display: none; }
  .cta-chip, .leader-row, .resource-list a, .copy-btn { transition: none; }
}