:root{--ink:#141a2b;--body:#2c3345;--muted:#6b7280;--line:#e6e8ef;--soft:#f5f6fa;--card:#fff;--acc:#2457e6;--acc-soft:#e8eefd;
--good:#0f9d7a;--ik:#b03a2e;--bc:#7a7f8c;--rl:#2457e6;--radius:14px}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:#fff;color:var(--body);font:16px/1.65 Inter,system-ui,-apple-system,Segoe UI,Roboto,sans-serif}
a{color:var(--acc);text-decoration:none}a:hover{text-decoration:underline}
img,video{max-width:100%;display:block}
video{background:var(--soft)}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
nav{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.93);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
nav .wrap{display:flex;align-items:center;gap:22px;height:54px;font-size:14px}
nav .brand{font-weight:700;color:var(--ink);margin-right:auto}
nav a{color:var(--body)}nav a.on{color:var(--ink);font-weight:600}
header{text-align:center;padding:52px 0 14px}
.org{display:inline-flex;align-items:center;gap:8px;color:var(--ink);font-weight:600;font-size:14px}
.org img.wordmark{height:62px;width:auto}
footer .wordmark-sm{height:34px;width:auto;display:inline-block;margin-bottom:6px;opacity:.85}
h1{margin:14px auto 6px;font-size:clamp(34px,6vw,58px);line-height:1.05;letter-spacing:-.02em;color:var(--ink);font-weight:800}
.subtitle{margin:0 auto;max-width:none;font-size:clamp(18px,2.25vw,25px);font-weight:500}
.authors{display:flex;flex-wrap:wrap;justify-content:center;gap:2px 18px;margin:20px 0 2px;font-size:17px;color:var(--ink)}.authors span{white-space:nowrap}
.aff{margin:10px 0 0;color:var(--muted);font-size:15px}.aff a{display:block}.aff img.wordmark{display:inline-block;opacity:.9}.aff-name{display:block;margin-top:2px}.aff a:hover img{opacity:1}
.links{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin:20px 0 6px}
.btn{display:inline-flex;align-items:center;gap:7px;padding:9px 18px;border-radius:999px;background:var(--ink);color:#fff;font-weight:600;font-size:14px;border:1px solid var(--ink);cursor:pointer}
.btn:hover{text-decoration:none;opacity:.88}
.btn.ghost{background:#fff;color:var(--ink);border-color:var(--line)}
.btn .soon{font-size:11px;font-weight:500;opacity:.7}
section{padding:54px 0 6px}
h2{font-size:30px;letter-spacing:-.01em;color:var(--ink);margin:0 0 10px}
h3{font-size:19px;color:var(--ink);margin:0 0 6px}
.lead{font-size:17px;max-width:860px;margin:0 0 18px}
.note{font-size:13.5px;color:var(--muted);margin:8px 0 0}
.panel{border:1px solid var(--line);border-radius:var(--radius);padding:18px;background:#fff}
.soft{background:var(--soft);border-radius:var(--radius);padding:18px}
.why .soft{display:flex;flex-direction:column}.why .soft p{margin:0 0 10px;font-size:15px}.why .soft .note{margin-top:auto;padding-top:6px;border-top:1px solid var(--line)}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:18px;align-items:start}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.vid{width:100%;border-radius:12px;border:1px solid var(--line)}
/* hero: independent loops */
.hero-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;margin:26px 0 6px;border-radius:var(--radius);overflow:hidden}
.hero-grid video{width:100%;aspect-ratio:4/3;object-fit:cover}
.hero-cta{display:flex;justify-content:center;width:100%;margin:14px 0 8px}
.hero-cta .arrow{display:inline-block;transition:transform .2s}
.hero-cta .btn:hover .arrow{transform:translateX(4px)}
/* stage blocks */
.stage{display:grid;grid-template-columns:1fr 1.25fr;gap:26px;align-items:center;margin-top:34px}
.stage.rev{grid-template-columns:1.25fr 1fr}
.stage .tagline{display:inline-block;font-size:12px;font-weight:700;color:var(--acc);letter-spacing:.07em;margin-bottom:4px}
.tabs{display:flex;flex-wrap:wrap;gap:6px;margin:0 0 10px}
.tab{padding:6px 13px;border-radius:999px;border:1px solid var(--line);background:#fff;font:inherit;font-size:13.5px;cursor:pointer;color:var(--body)}
.tab.on{background:var(--ink);color:#fff;border-color:var(--ink)}
.bars{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;align-items:end;height:104px;margin-top:10px}
.bar{display:flex;flex-direction:column;justify-content:flex-end;align-items:center;height:100%}
.bar i{display:block;width:70%;background:var(--acc);border-radius:5px 5px 0 0;transition:height .08s linear;min-height:2px}
.bar.idle i{background:#c9cdd8}
.bar span{font-size:12px;color:var(--muted);margin-top:4px}
.bar .v{font-size:11px;font-weight:600;color:var(--ink);margin-bottom:2px;font-variant-numeric:tabular-nums}
.legend{display:flex;flex-wrap:wrap;gap:14px;font-size:13.5px;color:var(--muted);margin-top:8px}
.dot{display:inline-block;width:10px;height:10px;border-radius:50%;margin-right:6px;vertical-align:-1px}
input[type=range]{width:100%;accent-color:var(--acc)}
.ticks{display:flex;justify-content:space-between;font-size:12px;color:var(--muted);margin-top:2px}
.kpis{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-top:12px}
.kpi{background:var(--soft);border-radius:10px;padding:10px 8px;text-align:center}
.kpi b{display:block;font-size:20px;color:var(--ink);letter-spacing:-.01em}
.kpi span{font-size:12px;color:var(--muted)}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:8px 0 22px}
.stat{background:var(--soft);border-radius:var(--radius);padding:16px 14px;text-align:center}
.stat .v{font-size:30px;font-weight:800;color:var(--ink);letter-spacing:-.02em}
.stat .k{font-size:13px;color:var(--muted);line-height:1.4}
.cmp{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.cmp .who{display:flex;justify-content:space-between;align-items:baseline;margin:8px 2px 2px;font-size:14px}
.cmp .who b{color:var(--ink)}
.cmp canvas{width:100%;height:70px;display:block;margin-top:4px}
.chart{width:100%;overflow-x:auto}
.chart svg{display:block;min-width:640px}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px}
.card{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;display:flex;flex-direction:column}
.card video{width:100%;aspect-ratio:4/3;object-fit:cover}
.card .body{padding:10px 14px 14px}
.card h4{margin:2px 0 4px;font-size:14.5px;color:var(--ink);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-weight:600}
.card p{margin:0;font-size:13.5px}
.card .meta{font-size:12px;color:var(--muted);margin-top:6px}
.badge{display:inline-block;font-size:10.5px;font-weight:700;letter-spacing:.05em;padding:2px 8px;border-radius:999px;margin-right:6px}
.badge.paper{background:#e3f5ef;color:#0b7a5f}.badge.next{background:#fff1dc;color:#9a5b00}.badge.zs{background:var(--acc-soft);color:var(--acc)}
.lvl{font-size:11px;font-weight:600;color:var(--muted)}
pre{background:var(--soft);border-radius:var(--radius);padding:16px 18px;overflow-x:auto;font-size:13.5px;line-height:1.5;color:var(--ink)}
footer{border-top:1px solid var(--line);margin-top:56px;padding:24px 0 40px;font-size:13.5px;color:var(--muted);text-align:center}
/* grid children may shrink below their content; wide charts scroll inside .chart instead of widening the page */
.grid2>*,.grid3>*,.stage>*,.cmp>*,.stats>*,.kpis>*{min-width:0}
@media (max-width:860px){
  .grid2,.grid3,.stage,.stage.rev,.cmp{grid-template-columns:1fr}
  .hero-grid{grid-template-columns:repeat(2,1fr)}
  .stats,.kpis{grid-template-columns:1fr 1fr}
  nav .hide-sm{display:none}
  .panel{overflow-x:auto}.panel img{width:720px;max-width:none}
}