/* ==========================================================================
   Long-Horizon Terminal-Bench — benchmark report stylesheet
   --------------------------------------------------------------------------
   Design system: editorial research article (matches handbook_blog).
   Warm paper background, serif display + serif body (Source Serif 4),
   Inter for UI/captions/figures, hairline borders, one blue accent plus
   sienna (reward/behavior) and graphite (implementation) figure semantics.

   Sections:
     0. Tokens + dark theme
     1. Base & typography
     2. Chrome: progress bar, topbar, TOC, layout
     3. Hero + TL;DR
     4. Article content: sections, notes, figures, asides
     5. Components: unit card, specs, insights
     6. Charts, leaderboard, tables
     7. Footer, reveal, responsive
   ========================================================================== */

/* ============================ 0. TOKENS ================================= */
:root {
  /* Ink & surfaces (light — warm paper) */
  --bg:        #ffffff;
  --surface:   #fdfcfa;
  --ink:       #201d18;
  --ink-soft:  #4a463f;
  --muted:     #6f6a61;
  --faint:     #8d887e;
  --line:      #e6e2d8;
  --line-soft: #efece4;
  --code-bg:   #f2f0e9;

  /* Accent: benchmark blue */
  --accent:      #2a78d6;
  --accent-ink:  #1c5cab;
  --accent-wash: #eaf1fb;

  /* Reward: sienna */
  --sienna:      #bd5f16;
  --sienna-ink:  #9a4a0b;
  --sienna-wash: #f9efe3;

  /* Implementation: graphite */
  --graphite:      #57534a;
  --graphite-wash: #f0eee7;

  /* Charts */
  --c-main:     #2a78d6;
  --c-dim:      #a5a29a;
  --c-good:     #0a700a;
  --c-warn:     #bd5f16;
  --c-avg:      #1a7f37;

  /* Type */
  --font-serif: "Source Serif 4", "Iowan Old Style", Georgia, "Times New Roman", serif;
  --font-sans:  "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono:  "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --text-body: 17px;
  --lh-body:   1.72;

  /* Metrics */
  --col:      680px;
  --col-wide: 920px;
  --toc-w:    230px;
  --radius:   10px;
  --radius-sm: 7px;
}

html.dark {
  --bg:        #131311;
  --surface:   #1a1a18;
  --ink:       #eae8e1;
  --ink-soft:  #c3c0b6;
  --muted:     #9b968b;
  --faint:     #7c786e;
  --line:      #2b2a26;
  --line-soft: #23221f;
  --code-bg:   #22211d;

  --accent:      #4e92e6;
  --accent-ink:  #86b6ef;
  --accent-wash: #1a2434;

  --sienna:      #d17c40;
  --sienna-ink:  #dd9a62;
  --sienna-wash: #2d2115;

  --graphite:      #a29d92;
  --graphite-wash: #24231f;

  --c-main: #3987e5;
  --c-dim:  #75736c;
  --c-good: #3cb453;
  --c-warn: #d17c40;
  --c-avg:  #3cb453;
}

/* ============================ 1. BASE =================================== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-serif);
  font-size: var(--text-body);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background .25s ease, color .25s ease;
}

h1, h2, h3, h4 { font-family: var(--font-serif); color: var(--ink); line-height: 1.22; margin: 0; font-weight: 600; }
p { margin: 0 0 1.25em; }
a { color: var(--accent-ink); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
em, i { font-style: italic; }
b, strong { font-weight: 600; }
code {
  font-family: var(--font-mono);
  font-size: .8em;
  background: var(--code-bg);
  padding: .1em .35em;
  border-radius: 4px;
  color: var(--ink-soft);
}
::selection { background: color-mix(in srgb, var(--accent) 22%, transparent); }

/* Concept accents — used sparingly in prose */
.u-b { color: var(--sienna-ink); font-weight: 600; }
.u-h { color: var(--accent-ink); font-weight: 600; }
.u-i { color: var(--graphite); font-weight: 600; }

/* ============================ 2. CHROME ================================= */
.progress-bar {
  position: fixed; top: 0; left: 0; height: 2px; width: 0%;
  background: var(--accent);
  z-index: 100;
}

.topbar {
  position: sticky; top: 0; z-index: 60;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.topbar__inner {
  max-width: 1160px; margin: 0 auto; padding: 10px 28px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.topbar__brand { display: flex; align-items: center; gap: 9px; color: var(--ink); font-family: var(--font-serif); font-weight: 600; font-size: 16px; }
.topbar__brand:hover { text-decoration: none; }
.brand-mark svg .bm-frame  { fill: var(--accent-wash); stroke: var(--accent-ink); stroke-width: 1.6; }
.brand-mark svg .bm-prompt { fill: none; stroke: var(--accent-ink); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.brand-mark svg .bm-cursor { stroke: var(--sienna); stroke-width: 1.8; stroke-linecap: round; }
.topbar__nav { display: flex; align-items: center; gap: 18px; }
.topbar__link { font-family: var(--font-sans); font-size: 13.5px; font-weight: 500; color: var(--muted); }
.topbar__link:hover { color: var(--ink); text-decoration: none; }
.topbar__link--cta {
  color: var(--accent-ink);
  border: 1px solid color-mix(in srgb, var(--accent) 36%, var(--line));
  padding: 5px 13px; border-radius: 999px;
}
.topbar__link--cta:hover { background: var(--accent-wash); }

.icon-btn {
  display: grid; place-items: center; width: 34px; height: 34px;
  border: 1px solid var(--line); border-radius: 9px; background: transparent;
  color: var(--ink-soft); cursor: pointer; transition: background .2s;
}
.icon-btn:hover { background: var(--line-soft); }
.icon-btn svg { stroke: currentColor; stroke-width: 1.7; fill: none; stroke-linecap: round; }
.icon-moon { display: none; }
html.dark .icon-sun  { display: none; }
html.dark .icon-moon { display: block; }

/* Layout grid: TOC + article */
.layout {
  max-width: 1160px; margin: 0 auto; padding: 0 28px;
  display: grid; grid-template-columns: var(--toc-w) minmax(0, 1fr);
  gap: 48px; align-items: start;
}
.layout--solo { grid-template-columns: minmax(0, 1fr); gap: 0; }
.toc { position: sticky; top: 82px; padding-top: 56px; max-height: calc(100vh - 96px); overflow-y: auto; }
.toc__title {
  font-family: var(--font-sans); font-size: 11px; font-weight: 650; letter-spacing: .12em;
  text-transform: uppercase; color: var(--faint); margin: 0 0 14px;
}
.toc__nav { display: flex; flex-direction: column; border-left: 1px solid var(--line); counter-reset: toc; }
.toc__item {
  font-family: var(--font-sans); font-size: 13px; line-height: 1.45; color: var(--muted);
  padding: 6px 14px; margin-left: -1px; border-left: 2px solid transparent;
  transition: color .15s, border-color .15s; counter-increment: toc;
}
.toc__item::before { content: counter(toc, decimal-leading-zero) "  "; font-size: 11px; color: var(--faint); font-variant-numeric: tabular-nums; }
.toc__item:hover { color: var(--ink); text-decoration: none; }
.toc__item.is-active { color: var(--accent-ink); border-left-color: var(--accent); }
.toc__item.is-active::before { color: var(--accent-ink); }

.article { padding: 56px 0 90px; min-width: 0; }
.article > section > *,
.article > footer > * { max-width: var(--col); margin-left: auto; margin-right: auto; }
.article > section > .figure--wide,
.article > section > .hero__figure { max-width: var(--col-wide); }
.hero > .hero__figure { max-width: var(--col-wide); }

/* ============================ 3. HERO + TLDR ============================ */
.hero { padding: 16px 0 4px; }
.hero__kicker {
  font-family: var(--font-sans); font-size: 12px; font-weight: 600;
  letter-spacing: .14em; text-transform: uppercase; color: var(--sienna-ink);
  margin: 0 0 20px;
}
.hero__title {
  font-size: clamp(40px, 5.6vw, 58px); font-weight: 600; letter-spacing: -.018em;
  line-height: 1.05; margin: 0 0 10px;
}
.hero__dek {
  font-size: clamp(19px, 2.3vw, 23px); line-height: 1.4; color: var(--ink-soft);
  font-style: italic; margin: 0 0 22px;
}
.hero__subtitle { font-size: 18px; line-height: 1.65; color: var(--ink-soft); margin: 0 0 26px; }

.hero__byline {
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
  padding: 14px 0; margin-bottom: 36px;
}
.authors { font-family: var(--font-sans); font-size: 13.5px; font-weight: 550; color: var(--ink); margin: 0 0 4px; }
.affils  { font-family: var(--font-sans); font-size: 12.5px; color: var(--muted); margin: 0; }

.hero__figure { margin: 0; }

/* TL;DR */
.tldr {
  margin: 48px auto; padding: 26px 0 8px;
  border-top: 2px solid var(--ink); border-bottom: 1px solid var(--line);
}
.tldr__kicker {
  font-family: var(--font-sans); font-size: 11.5px; font-weight: 650; letter-spacing: .12em;
  text-transform: uppercase; color: var(--faint); margin: 0 0 16px;
}
.tldr__list { list-style: none; counter-reset: tldr; margin: 0; padding: 0; display: grid; gap: 14px; }
.tldr__list li { position: relative; padding-left: 34px; counter-increment: tldr; color: var(--ink-soft); margin-bottom: 10px; }
.tldr__list li::before {
  content: counter(tldr);
  position: absolute; left: 0; top: .22em;
  font-family: var(--font-sans); font-size: 12px; font-weight: 650;
  width: 21px; height: 21px; border-radius: 50%;
  display: grid; place-items: center;
  color: var(--accent-ink); border: 1px solid color-mix(in srgb, var(--accent) 40%, var(--line));
}

/* ============================ 4. CONTENT ================================ */
.section { padding: 54px 0 10px; scroll-margin-top: 80px; }
.section__num {
  font-family: var(--font-sans); font-size: 12px; font-weight: 650;
  letter-spacing: .14em; text-transform: uppercase; color: var(--accent-ink);
  margin: 0 0 10px;
}
.section__title { font-size: clamp(26px, 3.2vw, 33px); font-weight: 600; letter-spacing: -.012em; margin: 0 0 .75em; }
.subhead { font-size: 21px; font-weight: 600; margin: 2.1em 0 .65em; }
.subhead--result { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.subhead__tag {
  font-family: var(--font-sans); font-size: 11.5px; font-weight: 650; letter-spacing: .1em;
  text-transform: uppercase; color: var(--accent-ink);
  border: 1px solid color-mix(in srgb, var(--accent) 40%, var(--line));
  padding: 3px 10px; border-radius: 999px; white-space: nowrap;
}

/* Margin-note style callout */
.note {
  margin: 30px auto; padding: 4px 0 4px 22px;
  border-left: 2px solid var(--accent);
}
.note__label {
  font-family: var(--font-sans); font-size: 11.5px; font-weight: 650; letter-spacing: .1em;
  text-transform: uppercase; color: var(--accent-ink); margin: 0 0 6px;
}
.note p:last-child { margin-bottom: 0; color: var(--ink-soft); font-size: 16px; line-height: 1.65; }

/* Figures */
.figure { margin: 36px auto; }
figcaption {
  font-family: var(--font-sans); font-size: 13px; line-height: 1.55; color: var(--muted);
  margin: 14px auto 0; max-width: var(--col);
}
figcaption b { color: var(--ink-soft); font-weight: 600; }
.illustration { width: 100%; }
.illustration svg { display: block; width: 100%; height: auto; }
.illustration svg text { font-family: var(--font-sans); }

/* Expandable aside */
.aside {
  margin: 28px auto; border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--surface); overflow: hidden;
}
.aside > summary {
  cursor: pointer; list-style: none; padding: 14px 18px;
  font-family: var(--font-sans); font-weight: 600; font-size: 14.5px; color: var(--ink);
  display: flex; align-items: center; gap: 10px;
}
.aside > summary::-webkit-details-marker { display: none; }
.aside > summary::before {
  content: ""; width: 7px; height: 7px; border-right: 1.6px solid var(--muted); border-bottom: 1.6px solid var(--muted);
  transform: rotate(-45deg); transition: transform .2s; flex: none;
}
.aside[open] > summary::before { transform: rotate(45deg); }
.aside > *:not(summary) { padding: 0 18px 16px; }
.aside p { margin: 0; color: var(--ink-soft); font-size: 15.5px; line-height: 1.65; }

/* ============================ 5. COMPONENTS ============================= */

/* --- Task card (anatomy) --- */
.unit-card {
  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
  background: var(--surface);
  font-family: var(--font-sans);
  box-shadow: 0 1px 2px rgba(20,18,12,.04);
}
.unit-card__head { padding: 18px 22px 16px; border-bottom: 1px solid var(--line); }
.unit-card__badge {
  display: inline-block; font-size: 10.5px; font-weight: 650; letter-spacing: .1em;
  text-transform: uppercase; color: var(--accent-ink); margin-bottom: 8px;
}
.unit-card__head h4 { font-family: var(--font-serif); font-size: 20px; margin: 0 0 6px; }
.unit-card__head p { margin: 0; font-size: 14px; color: var(--ink-soft); line-height: 1.55; }
.unit-card__fields { display: grid; grid-template-columns: 1fr 1fr; margin: 0; }
.unit-field { padding: 13px 22px; border-bottom: 1px solid var(--line-soft); }
.unit-field:nth-child(odd) { border-right: 1px solid var(--line-soft); }
.unit-field dt {
  font-size: 10.5px; font-weight: 650; letter-spacing: .09em; text-transform: uppercase;
  color: var(--faint); margin: 0 0 3px;
}
.unit-field dd { margin: 0; font-size: 13.5px; color: var(--ink-soft); line-height: 1.5; }
.unit-card__evidence {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
  padding: 14px 22px; background: var(--line-soft);
}
.unit-card__evlabel {
  font-size: 10.5px; font-weight: 650; letter-spacing: .09em; text-transform: uppercase;
  color: var(--faint); margin-right: 4px;
}
.evchip {
  font-size: 12px; color: var(--ink-soft);
  border: 1px solid var(--line); border-radius: 6px; padding: 3px 9px;
  background: var(--surface); white-space: nowrap;
}
.evchip code { background: none; padding: 0; font-size: 11.5px; color: var(--accent-ink); }

/* --- Experiment specs --- */
.specs {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 0;
  margin: 30px auto; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
  font-family: var(--font-sans);
}
.spec { padding: 18px 20px 16px; }
.spec + .spec { border-left: 1px solid var(--line); }
.spec__label {
  font-size: 10.5px; font-weight: 650; letter-spacing: .11em; text-transform: uppercase;
  color: var(--faint); margin: 0 0 7px;
}
.spec__value { font-family: var(--font-serif); font-size: 17.5px; font-weight: 600; color: var(--ink); margin: 0 0 7px; }
.spec__note { font-size: 12.5px; color: var(--muted); line-height: 1.5; margin: 0; }

/* Tick lists */
.ticklist { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.ticklist li {
  position: relative; padding-left: 24px; color: var(--ink-soft);
  font-size: 15px; line-height: 1.6;
}
.ticklist li::before {
  content: ""; position: absolute; left: 2px; top: 8px; width: 8px; height: 4.5px;
  border-left: 1.8px solid var(--accent-ink); border-bottom: 1.8px solid var(--accent-ink);
  transform: rotate(-45deg);
}
.ticklist--takeaways { max-width: var(--col); margin: 8px auto 26px; gap: 14px; }
.ticklist--takeaways li { font-size: 17px; line-height: 1.65; padding-left: 28px; }
.ticklist--takeaways li::before { top: 10px; width: 9px; height: 5px; }

.closing {
  font-size: 18px; line-height: 1.7; color: var(--ink);
  border-top: 1px solid var(--line); padding-top: 22px; margin-top: 6px;
  font-style: italic;
}

/* --- Insights --- */
.insights { margin: 30px auto; display: grid; gap: 0; max-width: var(--col); }
.insight {
  display: grid; grid-template-columns: 52px 1fr; gap: 16px; align-items: start;
  padding: 20px 0; border-top: 1px solid var(--line);
}
.insight:last-child { border-bottom: 1px solid var(--line); }
.insight__n {
  font-family: var(--font-sans); font-size: 13px; font-weight: 650;
  color: var(--faint); padding-top: 5px; font-variant-numeric: tabular-nums;
}
.insight h3 { font-size: 19px; margin: 0 0 6px; }
.insight p { color: var(--ink-soft); margin: 0; font-size: 15.5px; line-height: 1.65; }

/* ============================ 6. CHARTS + LEADERBOARD =================== */
.chart-card {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--surface); padding: 22px 24px 18px;
}
.chart-card__head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 8px; flex-wrap: wrap; }
.chart-duo { display: grid; grid-template-columns: 1fr 1fr; gap: 34px; }

/* Segmented toggle (chart y-axis switch) */
.seg { display: inline-flex; background: var(--line-soft); border: 1px solid var(--line); border-radius: 9px; padding: 2px; gap: 2px; flex: none; }
.seg__btn {
  font-family: var(--font-sans); font-size: 12px; font-weight: 600; color: var(--muted);
  background: none; border: none; padding: 5px 12px; border-radius: 7px; cursor: pointer;
  transition: color .15s, background .15s;
}
.seg__btn:hover { color: var(--ink); }
.seg__btn.is-active { color: var(--accent-ink); background: var(--surface); box-shadow: 0 1px 2px rgba(0,0,0,.07); }
.chart-panel { min-width: 0; }
.chart-panel__title {
  font-family: var(--font-sans); font-size: 14px; font-weight: 650; color: var(--ink);
  margin: 0 0 2px; letter-spacing: -.005em;
}
.chart-panel__sub { font-family: var(--font-sans); font-size: 12px; color: var(--muted); margin: 0 0 12px; }
.chart { width: 100%; }
.chart svg { width: 100%; height: auto; display: block; overflow: visible; }

/* Interactive scatter dots + tooltip */
.cost-dot { cursor: pointer; transition: r .12s ease; }
.cost-dot:hover { r: 8.5; }
.avg-dot { transition: transform .12s ease; transform-box: fill-box; transform-origin: center; }
.avg-dot:hover { transform: scale(1.18); }
.chart-tip {
  position: absolute; left: 0; top: 0; z-index: 20; pointer-events: none;
  min-width: 150px; max-width: 220px;
  background: var(--surface); border: 1px solid var(--line); border-radius: 9px;
  box-shadow: 0 6px 20px rgba(20,18,12,.14);
  padding: 10px 12px; font-family: var(--font-sans);
  opacity: 0; transform: translateY(3px); transition: opacity .12s ease, transform .12s ease;
}
.chart-tip.is-on { opacity: 1; transform: none; }
.chart-tip__logo-name { display: flex; align-items: center; gap: 7px; }
.chart-tip__logo-name img { border-radius: 4px; }
html.dark .chart-tip__logo-name img { background: #fff; padding: 1px; }
.chart-tip__logo-name b { font-size: 13px; color: var(--ink); }
.chart-tip__vendor { font-size: 11px; color: var(--muted); margin: 1px 0 8px 25px; }
.chart-tip__stats { display: grid; grid-template-columns: auto 1fr; gap: 3px 12px; margin: 0; }
.chart-tip__stats dt { font-size: 11.5px; color: var(--muted); margin: 0; }
.chart-tip__stats dd { font-size: 11.5px; font-weight: 650; color: var(--ink); margin: 0; text-align: right; font-variant-numeric: tabular-nums; }
.chart-tip__stats dt.on { color: var(--accent-ink); font-weight: 700; }
.chart-tip__stats dd.on { color: var(--accent-ink); }

/* chart text */
.chart .tick-label, .chart .grp-label { font-family: var(--font-sans); fill: var(--muted); }
.chart .val-label { font-family: var(--font-sans); fill: var(--ink-soft); font-weight: 600; }
.chart .axis-line { stroke: var(--line); stroke-width: 1; }
.chart .grid-line { stroke: var(--line-soft); stroke-width: 1; }

/* bar entrance: CSS-only so charts never screenshot empty */
.chart .bar, .lb .bar { transform-box: fill-box; transform-origin: left; animation: barIn .7s cubic-bezier(.2,.7,.2,1) both; }
.chart .bar--v { transform-origin: bottom; }
@keyframes barIn { from { transform: scale(0,1); } to { transform: scale(1,1); } }
.chart .bar--v { animation-name: barInV; }
@keyframes barInV { from { transform: scaleY(0); } to { transform: scaleY(1); } }
.chart .fade-label, .lb .fade-label { animation: lblIn .5s ease .45s both; }
@keyframes lblIn { from { opacity: 0; } to { opacity: 1; } }
@media (prefers-reduced-motion: reduce) {
  .chart .bar, .lb .bar, .chart .fade-label, .lb .fade-label { animation: none; }
}

/* --- Leaderboard rows --- */
.lb { font-family: var(--font-sans); margin-top: 6px; }
.lb-head, .lb-row {
  display: grid; grid-template-columns: 30px minmax(170px, 1.15fr) 2fr 96px 74px;
  align-items: center; gap: 14px; padding: 8px 6px;
}
.lb-head {
  color: var(--faint); font-size: 10.5px; text-transform: uppercase; letter-spacing: .08em;
  font-weight: 650; border-bottom: 1px solid var(--line);
}
.lb-row { border-bottom: 1px solid var(--line-soft); }
.lb-row:last-child { border-bottom: none; }
.lb-row.top { background: color-mix(in srgb, var(--accent-wash) 55%, transparent); border-radius: 8px; }
.lb__rank { font-size: 12px; color: var(--faint); font-variant-numeric: tabular-nums; text-align: right; }
.lb__model { min-width: 0; display: flex; align-items: center; gap: 10px; }
.lb__logo { flex: none; width: 22px; height: 22px; display: inline-block; border-radius: 5px; }
.lb__logo--dot { background: var(--c-dim); border-radius: 50%; width: 10px; height: 10px; margin: 0 6px; }
html.dark .lb__logo:not(.lb__logo--dot) { background: #fff; padding: 2px; }
.lb__modeltext { min-width: 0; display: flex; flex-direction: column; line-height: 1.25; }
.lb__name { font-size: 13.5px; font-weight: 600; color: var(--ink); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.lb__vendor { font-size: 11px; color: var(--muted); }
.lb__barwrap { position: relative; height: 20px; }
.lb__track { position: absolute; inset: 3px 0; border-radius: 5px; background: var(--line-soft); }
.lb__fill {
  position: absolute; top: 3px; bottom: 3px; left: 0; border-radius: 5px 4px 4px 5px;
  background: var(--c-main); transform-origin: left; animation: barIn .7s cubic-bezier(.2,.7,.2,1) both;
  transition: width .6s cubic-bezier(.2,.7,.2,1), background .3s ease;
}
.lb__mean { transition: color .3s ease; }
@media (prefers-reduced-motion: reduce) { .lb__fill { transition: none; } }
.lb-row.anthropic .lb__fill { background: var(--sienna); }
.lb__mean { font-size: 13px; font-weight: 650; color: var(--ink); font-variant-numeric: tabular-nums; text-align: right; }
.lb__solved { font-size: 11.5px; color: var(--muted); font-variant-numeric: tabular-nums; text-align: right; white-space: nowrap; }

/* --- Long-horizon scale panel --- */
.horizon { margin: 44px 0 8px; }
.horizon__lead { max-width: 62ch; margin: 6px 0 22px; color: var(--ink-soft); }
.hz-head, .hz-row {
  display: grid; grid-template-columns: 26px minmax(150px, 1fr) 2fr 54px 150px;
  align-items: center; gap: 14px; padding: 7px 6px;
}
.hz-head {
  color: var(--faint); font-size: 10.5px; text-transform: uppercase; letter-spacing: .08em;
  font-weight: 650; border-bottom: 1px solid var(--line);
}
.hz-row { border-bottom: 1px solid var(--line-soft); }
.hz-row:last-child { border-bottom: none; }
.hz__logo { flex: none; width: 22px; height: 22px; display: inline-block; border-radius: 5px; }
.hz__logo--dot { background: var(--c-dim); border-radius: 50%; width: 10px; height: 10px; margin: 0 6px; }
html.dark .hz__logo:not(.hz__logo--dot) { background: #fff; padding: 2px; }
.hz__modeltext { min-width: 0; display: flex; flex-direction: column; line-height: 1.25; }
.hz__name { font-size: 13.5px; font-weight: 600; color: var(--ink); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.hz__vendor { font-size: 11px; color: var(--muted); }
.hz__barwrap { position: relative; height: 20px; }
.hz__track { position: absolute; inset: 3px 0; border-radius: 5px; background: var(--line-soft); }
.hz__fill {
  position: absolute; top: 3px; bottom: 3px; left: 0; border-radius: 5px 4px 4px 5px;
  background: var(--c-main); transform-origin: left; animation: barIn .7s cubic-bezier(.2,.7,.2,1) both;
}
.hz-row.anthropic .hz__fill { background: var(--sienna); }
.hz__steps { font-size: 13px; font-weight: 700; color: var(--ink); font-variant-numeric: tabular-nums; text-align: right; }
.hz__meta { font-size: 11.5px; color: var(--muted); font-variant-numeric: tabular-nums; text-align: right; white-space: nowrap; }
.hz__meta b { color: var(--ink-soft); font-weight: 700; }

/* --- Tables (hardest tasks) --- */
.loc-card { padding-bottom: 0; }
.loc-table-wrap { overflow-x: auto; margin: 0 -24px; }
.loc-table { width: 100%; border-collapse: collapse; font-family: var(--font-sans); font-size: 13px; min-width: 620px; }
.loc-table thead th {
  text-align: left; font-size: 10.5px; font-weight: 650; letter-spacing: .09em; text-transform: uppercase;
  color: var(--faint); padding: 12px 14px; border-bottom: 1px solid var(--line);
}
.loc-table thead th:first-child { padding-left: 24px; }
.loc-table thead th:last-child { padding-right: 24px; }
.loc-table td { padding: 9px 14px; border-bottom: 1px solid var(--line-soft); vertical-align: middle; }
.loc-table td:first-child { padding-left: 24px; }
.loc-table td:last-child { padding-right: 24px; }
.loc-table tbody tr:last-child td { border-bottom: none; }
.loc-table .cell-task { font-family: var(--font-mono); font-size: 12px; color: var(--ink); }
.loc-table .cell-domain { color: var(--muted); }
.loc-bar { position: relative; height: 18px; min-width: 120px; }
.loc-bar__track { position: absolute; inset: 0; border-radius: 4px; background: var(--line-soft); }
.loc-bar__fill {
  position: absolute; left: 0; top: 0; bottom: 0; border-radius: 4px 3px 3px 4px;
  background: var(--c-warn); transform-origin: left; animation: barIn .8s cubic-bezier(.2,.7,.2,1) both;
}
.loc-bar__val {
  position: relative; z-index: 1; font-size: 11px; font-weight: 600; color: var(--ink);
  padding-left: 7px; line-height: 18px; font-variant-numeric: tabular-nums;
}

/* --- Community leaderboard: submit card --- */
.submit { padding-bottom: 20px; }
.submit__head { margin-bottom: 14px; }
.submit__cmds { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.cmd__label {
  font-family: var(--font-sans); font-size: 11px; font-weight: 650; letter-spacing: .05em;
  text-transform: uppercase; color: var(--faint); margin: 0 0 7px;
}
.cmd__box { position: relative; }
.cmd__box pre {
  font-family: var(--font-mono); font-size: 12px; line-height: 1.6; color: var(--ink-soft);
  background: var(--code-bg); border: 1px solid var(--line); border-radius: var(--radius-sm);
  padding: 14px 16px; margin: 0; overflow-x: auto; white-space: pre;
}
.cmd__copy {
  position: absolute; top: 8px; right: 8px;
  font-family: var(--font-sans); font-size: 11.5px; font-weight: 600; color: var(--accent-ink);
  background: var(--surface); border: 1px solid var(--line); border-radius: 6px;
  padding: 3px 9px; cursor: pointer;
}
.cmd__copy:hover { background: var(--accent-wash); }
.submit__note { font-family: var(--font-sans); font-size: 12.5px; color: var(--muted); margin: 15px 0 0; line-height: 1.6; }
.submit__note code { font-size: 11.5px; }

/* --- Community leaderboard: filter bar --- */
.lbrd-bar {
  display: flex; align-items: center; justify-content: space-between; gap: 14px;
  flex-wrap: wrap; padding: 4px 0 16px;
}
.lbrd-count { font-family: var(--font-sans); font-size: 12px; font-weight: 600; color: var(--muted); }
.lbrd-filters { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.lbrd-select {
  font-family: var(--font-sans); font-size: 12px; font-weight: 500; color: var(--ink-soft);
  background: var(--surface); border: 1px solid var(--line); border-radius: 7px;
  padding: 5px 26px 5px 10px; cursor: pointer; appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' fill='none' stroke='%238d887e' stroke-width='1.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 9px center;
}
.lbrd-select:hover { border-color: var(--muted); }
.lbrd-check {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-sans); font-size: 12px; font-weight: 500; color: var(--ink-soft); cursor: pointer;
}
.lbrd-check input { accent-color: var(--accent); cursor: pointer; }
.lbrd-clear {
  font-family: var(--font-sans); font-size: 12px; font-weight: 600; color: var(--muted);
  background: none; border: none; padding: 5px 6px; cursor: pointer; border-radius: 6px;
}
.lbrd-clear:hover { color: var(--accent-ink); text-decoration: underline; text-underline-offset: 3px; }

/* --- Community leaderboard: table --- */
.lbrd-table { min-width: 720px; }
.lbrd-table td { font-family: var(--font-sans); }
.lbrd-table .cell-rank { font-variant-numeric: tabular-nums; color: var(--faint); font-weight: 650; width: 46px; }
.lbrd-table tr.top .cell-rank { color: var(--sienna-ink); }
.lbrd-table .cell-agent { font-weight: 600; color: var(--ink); white-space: nowrap; }
.lbrd-model { display: flex; align-items: center; gap: 8px; min-width: 0; }
.lbrd-model img { flex: none; width: 20px; height: 20px; border-radius: 5px; }
html.dark .lbrd-model img { background: #fff; padding: 2px; }
.lbrd-model__name { font-weight: 600; color: var(--ink); white-space: nowrap; }
.lbrd-table .cell-sub { color: var(--ink-soft); }
.lbrd-table .cell-date { color: var(--muted); font-variant-numeric: tabular-nums; white-space: nowrap; }
.lbrd-table .cell-solved { color: var(--ink-soft); font-variant-numeric: tabular-nums; text-align: right; white-space: nowrap; }
.cell-solved__pct { color: var(--faint); font-size: 11.5px; margin-left: 3px; }
.lbrd-select--thresh { font-weight: 600; color: var(--accent-ink); border-color: color-mix(in srgb, var(--accent) 30%, var(--line)); }
.lbrd-score { display: flex; align-items: center; justify-content: flex-end; gap: 8px; }
.lbrd-score__val { font-weight: 700; color: var(--ink); font-variant-numeric: tabular-nums; }
.lbrd-empty { text-align: center; color: var(--muted); font-family: var(--font-sans); font-size: 13px; padding: 26px 0; }

/* verified badge */
.verified {
  display: inline-flex; align-items: center; gap: 3px;
  font-family: var(--font-sans); font-size: 10.5px; font-weight: 650; letter-spacing: .01em;
  color: var(--c-good); background: color-mix(in srgb, var(--c-good) 12%, transparent);
  border-radius: 20px; padding: 2px 7px 2px 5px; line-height: 1;
}
.verified svg { fill: none; stroke: var(--c-good); stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; }
.verified--inline { transform: translateY(1px); }
.lbrd-badge { flex: none; }

/* ============================ 7. FOOTER + REVEAL ======================== */
.footer { border-top: 1px solid var(--line); margin-top: 70px; padding-top: 40px; }
.footer h3 { font-size: 19px; margin: 0 0 14px; }
.bibtex { position: relative; }
.bibtex pre {
  font-family: var(--font-mono); font-size: 12.5px; line-height: 1.6; color: var(--ink-soft);
  background: var(--code-bg); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px 20px; overflow-x: auto; margin: 0;
}
.bibtex__copy {
  position: absolute; top: 11px; right: 11px;
  font-family: var(--font-sans); font-size: 12.5px; font-weight: 600; color: var(--accent-ink);
  background: var(--surface); border: 1px solid var(--line); border-radius: 7px;
  padding: 4px 11px; cursor: pointer;
}
.bibtex__copy:hover { background: var(--accent-wash); }

.reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }

@media (max-width: 1000px) {
  .layout { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .toc { display: none; }
  .article { padding-top: 32px; }
}
@media (max-width: 720px) {
  body { font-size: 16px; }
  .topbar__link:not(.topbar__link--cta) { display: none; }
  .chart-duo { grid-template-columns: 1fr; gap: 26px; }
  .specs { grid-template-columns: 1fr; }
  .spec + .spec { border-left: none; border-top: 1px solid var(--line); }
  .unit-card__fields { grid-template-columns: 1fr; }
  .unit-field:nth-child(odd) { border-right: none; }
  .chart-card { padding: 16px 16px 14px; }
  .loc-table-wrap { margin: 0 -16px; }
  .lb-head, .lb-row { grid-template-columns: 24px minmax(120px, 1.3fr) 1.3fr 70px; }
  .lb__solved { display: none; }
  .lb-head span:last-child { display: none; }
  .hz-head, .hz-row { grid-template-columns: 24px minmax(110px, 1.2fr) 1.3fr 46px; }
  .hz__meta { display: none; }
  .hz-head span:last-child { display: none; }
  .submit__cmds { grid-template-columns: 1fr; }
  .lbrd-bar { align-items: flex-start; }
  .lbrd-filters { width: 100%; }
}