/* KnownLieBench — Direction B "Living Benchmark". Deliberately single-theme light. */
:root {
  --ground: #FAFBFC; --panel: #FFFFFF; --ink: #1F2933; --muted: #5A6570;
  --line: #E5E9ED; --hairline: #EEF1F4; --chip: #EEF1F4;
  --green: #2E8B6B; --green-soft: #E4F1EC; --red: #C0392B; --amber: #D98F3F;
  --link: #2C557F;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--ground); color: var(--ink);
  font: 15px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--green); outline-offset: 2px; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 22px; }

/* ---- nav ---- */
.nav { position: sticky; top: 0; z-index: 40; background: var(--panel); border-bottom: 1px solid var(--line); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 54px; gap: 16px; }
@media (max-width: 560px) {
  .nav-inner { height: auto; padding: 8px 0; flex-wrap: wrap; gap: 8px 14px; }
  .nav-links { gap: 14px; font-size: 13px; flex-wrap: wrap; }
  .search { font-size: 16px; }
}
.wordmark { font-weight: 800; font-size: 17px; letter-spacing: -.01em; color: var(--ink); }
.wordmark em { color: var(--red); font-style: normal; }
.nav-links { display: flex; gap: 22px; font-size: 14px; }
.nav-links a { color: var(--muted); padding-bottom: 3px; }
.nav-links a.active { color: var(--ink); font-weight: 600; border-bottom: 2px solid var(--green); }

/* ---- hero ---- */
.hero { padding-top: 64px; padding-bottom: 16px; }
.hero.centered { text-align: center; }
.site-title { font-size: 46px; font-weight: 800; letter-spacing: -.02em; margin: 0; line-height: 1.1; }
.site-title em { color: var(--red); font-style: normal; }
.paper-title { font-size: 17.5px; color: var(--ink); font-weight: 600; max-width: 56ch;
               margin: 14px auto 0; line-height: 1.4; text-wrap: balance; }
.authors { font-size: 21px; margin: 22px auto 0; max-width: 76ch; line-height: 1.75; }
.authors sup, .affils sup { color: var(--muted); }
.affils { font-size: 17px; color: var(--muted); margin: 10px auto 0; max-width: 84ch; line-height: 1.75; }
.affils span { white-space: nowrap; margin: 0 10px; }
.hero-actions { display: flex; gap: 10px; margin-top: 24px; flex-wrap: wrap; }
.hero.centered .hero-actions, .hero.centered .stats { justify-content: center; }
.btn { display: inline-flex; align-items: center; gap: 7px; border-radius: 999px; padding: 8px 18px;
       font-size: 13.5px; font-weight: 600; border: 1.5px solid var(--ink); color: var(--ink); background: var(--panel); }
.btn.primary { background: var(--ink); color: #fff; }
.btn:hover { text-decoration: none; opacity: .85; }
.btn.disabled { opacity: .55; cursor: default; }
.btn.disabled:hover { opacity: .55; }

/* ---- stat tiles ---- */
.stats { display: flex; gap: 12px; margin: 30px 0 8px; flex-wrap: wrap; }
.stat { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 12px 20px; min-width: 108px; }
.stat b { display: block; font-size: 23px; font-weight: 800; font-variant-numeric: tabular-nums; }
.stat span { font-size: 11.5px; color: var(--muted); letter-spacing: .06em; text-transform: uppercase; }

/* ---- sections ---- */
section.wrap { padding-top: 72px; padding-bottom: 12px; }
section[id] { scroll-margin-top: 70px; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
.sec-head { display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap; margin-bottom: 4px; }
h2 { font-size: 22px; font-weight: 800; letter-spacing: -.01em; margin: 0 0 4px; }
.sec-sub { color: var(--muted); font-size: 14px; max-width: 72ch; margin: 4px 0 20px; }

/* ---- controls ---- */
.controls { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; margin: 6px 0 14px; }
.tabs { display: inline-flex; background: var(--chip); border-radius: 10px; padding: 3px; }
.tabs button { border: 0; background: transparent; border-radius: 8px; padding: 6px 16px; font-size: 13.5px;
               color: var(--muted); cursor: pointer; font-weight: 600; font-family: inherit; }
.tabs button.on { background: var(--panel); color: var(--ink); box-shadow: 0 1px 2px rgba(15,20,26,.10); }
.ctl-label { font-size: 11.5px; color: var(--muted); text-transform: uppercase; letter-spacing: .07em; font-weight: 600; }

/* ---- leaderboard table ---- */
.board { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; overflow: hidden; }
.board-scroll { overflow-x: auto; }
table.lb { width: 100%; border-collapse: collapse; font-size: 13.5px; font-variant-numeric: tabular-nums; min-width: 760px; }
.lb thead th { text-align: left; font-size: 11px; letter-spacing: .06em; text-transform: uppercase;
               color: var(--muted); background: var(--ground); padding: 10px 12px; cursor: pointer; user-select: none;
               white-space: nowrap; }
.lb thead th:focus-visible { outline: 2px solid var(--green); outline-offset: -2px; }
.lb thead th.num { text-align: right; }
.lb thead th .arrow { opacity: .55; font-size: 10px; }
.lb tbody td { padding: 9px 12px; border-top: 1px solid var(--hairline); vertical-align: middle; }
.lb .rank { color: var(--muted); width: 30px; }
.lb .model b { font-weight: 650; }
.lb .model .dev { color: var(--muted); font-size: 12px; margin-left: 7px; }
.ow { display: inline-block; font-size: 10px; letter-spacing: .05em; color: var(--link);
      border: 1px solid currentColor; border-radius: 5px; padding: 0 5px; margin-left: 7px; vertical-align: 1px; }
.bar-cell { width: 34%; min-width: 190px; }
.bar-track { background: var(--chip); border-radius: 4px; height: 15px; position: relative; }
.bar-fill { height: 100%; border-radius: 4px; min-width: 2px; }
.bar-val { position: absolute; right: 7px; top: 0; line-height: 15px; font-size: 11.5px; color: var(--ink); }
.zero-chip { display: inline-flex; align-items: center; gap: 5px; background: var(--green-soft); color: var(--green);
             font-size: 11.5px; font-weight: 600; border-radius: 999px; padding: 1px 9px; }
.lb td.num { text-align: right; white-space: nowrap; }
.lb .dash { color: #A6AFB8; }
.td-pos { color: var(--green); } .td-neg { color: var(--red); }
.board-note { font-size: 12.5px; color: var(--muted); padding: 10px 14px; border-top: 1px solid var(--hairline); }

/* ---- heatmap ---- */
.heat-scroll { overflow-x: auto; background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 16px; }
table.heat { border-collapse: separate; border-spacing: 3px; font-size: 11.5px; font-variant-numeric: tabular-nums; }
.heat th { font-weight: 600; color: var(--muted); font-size: 11px; text-align: center; padding: 2px 4px; }
.heat th.rowh { text-align: right; padding-right: 9px; white-space: nowrap; font-variant-numeric: normal; }
.heat td { width: 46px; height: 26px; text-align: center; border-radius: 4px; font-size: 12px; font-weight: 600; }
.heat-legend { display: flex; align-items: center; gap: 8px; font-size: 11.5px; color: var(--muted); margin-top: 10px; }
.heat-ramp { width: 140px; height: 10px; border-radius: 5px;
             background: linear-gradient(90deg, #FBF1ED, #EEB4A3, #CD5F4E, #C0392B, #96281B); }

/* ---- method ---- */
.figure { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 16px; overflow-x: auto; }
.figure img { max-width: 100%; height: auto; display: block; margin: 0 auto; }
.figure.breakout { width: min(1360px, calc(100vw - 32px)); position: relative;
                   left: 50%; transform: translateX(-50%); }
.fig-zoom { display: block; }
.fig-zoom:hover { opacity: .95; }
.figure figcaption { font-size: 12.5px; color: var(--muted); margin-top: 10px; text-align: center; }

/* ---- cases page ---- */
.filters { display: flex; gap: 8px; flex-wrap: wrap; margin: 14px 0; align-items: center; }
.chipbtn { border: 1px solid var(--line); background: var(--panel); color: var(--muted); border-radius: 999px;
           padding: 5px 14px; font-size: 13px; cursor: pointer; font-family: inherit; }
.chipbtn.on { background: var(--ink); color: #fff; border-color: var(--ink); }
.search { border: 1px solid var(--line); border-radius: 999px; padding: 6px 16px; font-size: 13.5px;
          min-width: 200px; font-family: inherit; color: var(--ink); background: var(--panel); }
.count { font-size: 13px; color: var(--muted); }
.case-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(310px, 1fr)); gap: 12px; margin-top: 8px; }
.case { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; }
.case h3 { margin: 0; font-size: 14px; }
.case .meta { font-size: 12px; color: var(--muted); margin: 3px 0 8px; }
.badge { font-size: 10.5px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase;
         border-radius: 5px; padding: 1px 7px; }
.badge.owed { background: var(--green-soft); color: var(--green); }
.badge.calib { background: var(--chip); color: var(--muted); }
.case p { font-size: 13px; color: var(--ink); margin: 6px 0; }
.case details { font-size: 12.5px; color: var(--muted); }
.case details summary { cursor: pointer; color: var(--link); font-size: 12.5px; }
.case dl { margin: 8px 0 0; }
.case dt { font-size: 10.5px; letter-spacing: .07em; text-transform: uppercase; font-weight: 700; color: var(--muted); margin-top: 8px; }
.case dd { margin: 2px 0 0; color: var(--ink); }

/* ---- stories ---- */
.story { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 18px 20px; margin-bottom: 14px; }
.story-head { display: flex; gap: 10px; align-items: baseline; flex-wrap: wrap; }
.story-head b { font-size: 15px; }
.mech { font-size: 11px; font-weight: 700; letter-spacing: .05em; text-transform: uppercase;
        background: #F6DCD4; color: #96281B; border-radius: 5px; padding: 1px 8px; }
.story .ctx { font-size: 12.5px; color: var(--muted); margin: 4px 0 12px; }
.bubble { max-width: 76%; border-radius: 12px; padding: 9px 13px; font-size: 13.5px; margin: 7px 0; }
.bubble.user { background: var(--chip); color: var(--ink); border-bottom-left-radius: 4px; }
.bubble.agent { background: var(--green-soft); color: var(--ink); margin-left: auto; border-bottom-right-radius: 4px; }
.bubble .who { display: block; font-size: 10.5px; letter-spacing: .06em; text-transform: uppercase;
               font-weight: 700; color: var(--muted); margin-bottom: 3px; }
.bubble mark { background: #F6DCD4; color: #96281B; border-radius: 3px; padding: 0 2px; }
.verdict { border-left: 3px solid var(--red); background: #FDF6F4; border-radius: 0 10px 10px 0;
           padding: 10px 14px; font-size: 13px; margin-top: 12px; }
.verdict b { color: var(--red); font-size: 11px; letter-spacing: .07em; text-transform: uppercase; }
.tooltip { position: fixed; pointer-events: none; background: var(--ink); color: #fff; font-size: 12px;
           border-radius: 7px; padding: 6px 10px; z-index: 90; display: none; max-width: 260px; }

/* ---- citation / footer ---- */
.bib { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 14px 18px;
       font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; font-size: 12px; overflow-x: auto;
       white-space: pre; line-height: 1.5; color: var(--ink); }
footer { border-top: 1px solid var(--line); margin-top: 64px; padding: 24px 0 44px; color: var(--muted); font-size: 13px; }
footer .wrap { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }