/* UrbanWind-AgentBench site — engineering-paper look (hairlines, faint grid), Nature (NPG) palette for data. */
:root{
  --display:"Bricolage Grotesque","Inter",system-ui,sans-serif;
  --body:"Inter",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --maxw:1200px; --gutter:clamp(18px,4.5vw,64px); --r:14px;
  --ease:cubic-bezier(.22,1,.36,1);
  --npg-red:#E64B35; --npg-cyan:#4DBBD5; --npg-teal:#00A087; --npg-navy:#3C5488; --npg-salmon:#F39B7F;
  --npg-lav:#8491B4; --npg-mint:#91D1C2; --npg-maroon:#DC0000; --npg-brown:#7E6148; --npg-sand:#B09C85;
}
:root,[data-theme="light"]{
  color-scheme:light;
  --bg:#f7f5f2; --bg-2:#efece6; --surface:#ffffff; --ink:#0f172a; --ink-2:#475569; --ink-3:#64748b;
  --line:rgba(15,23,42,.10); --line-2:rgba(15,23,42,.20); --grid:rgba(60,84,136,.06);
  --base:#94a3b8; --wp:var(--npg-red); --num:var(--npg-teal);
  --shadow:0 1px 2px rgba(15,23,42,.05),0 14px 36px rgba(15,23,42,.07);
  --term:#0f172a; --term-ink:#e2e8f0; --term-dim:#94a3b8; --veil:rgba(247,245,242,.70);
}
[data-theme="dark"]{
  color-scheme:dark;
  --bg:#111418; --bg-2:#171b20; --surface:#1a1f25; --ink:#ecebe7; --ink-2:#aab1bb; --ink-3:#8a929c;
  --line:rgba(255,255,255,.09); --line-2:rgba(255,255,255,.2); --grid:rgba(255,255,255,.03);
  --base:#64748b; --wp:#ff7a5f; --num:#33c3a6;
  --shadow:0 1px 2px rgba(0,0,0,.4),0 16px 40px rgba(0,0,0,.35);
  --term:#0b0f14; --term-ink:#e2e8f0; --term-dim:#8b97a6; --veil:rgba(17,20,24,.66);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:76px}
body{margin:0;background:var(--bg);color:var(--ink);font:400 16.5px/1.65 var(--body);-webkit-font-smoothing:antialiased;
  background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:48px 48px;
  transition:background-color .4s var(--ease),color .4s var(--ease)}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--gutter)}
.mono{font-family:var(--mono);font-feature-settings:"tnum"}
a{color:inherit}
h1,h2,h3{font-family:var(--display);letter-spacing:-.02em;margin:0}
h1{font-size:clamp(38px,5.6vw,76px);line-height:1.02;font-weight:700;max-width:16ch}
h1 em{font-style:normal;color:var(--wp);position:relative}
h2{font-size:clamp(28px,3.4vw,46px);line-height:1.08;font-weight:650;max-width:22ch;margin-bottom:18px}
h3{font-size:19px;font-weight:650;letter-spacing:-.01em}
.skip{position:absolute;left:-999px;top:8px;background:var(--ink);color:var(--bg);padding:8px 12px;border-radius:8px;z-index:99}
.skip:focus{left:8px}
:focus-visible{outline:2px solid var(--npg-cyan);outline-offset:3px;border-radius:6px}

/* nav */
.nav{position:fixed;inset:0 0 auto 0;height:64px;display:flex;align-items:center;gap:28px;padding:0 var(--gutter);z-index:50;
  transition:background .35s var(--ease),box-shadow .35s var(--ease),backdrop-filter .35s}
.nav.solid{background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:saturate(1.4) blur(14px);box-shadow:0 1px 0 var(--line)}
.brand{display:flex;align-items:center;gap:10px;font:650 17px var(--display);text-decoration:none;letter-spacing:-.01em;white-space:nowrap}
.brand-dim{color:var(--ink-3);font-weight:500}
.brand-mark{width:22px;height:22px;border-radius:6px;background:conic-gradient(from 200deg,var(--npg-navy),var(--npg-cyan),var(--npg-teal),var(--npg-salmon),var(--npg-red),var(--npg-navy))}
.nav nav{position:relative;display:flex;gap:4px;margin-left:auto}
.nav nav a{font-size:14px;font-weight:500;color:var(--ink-2);text-decoration:none;padding:8px 12px;border-radius:8px;transition:color .2s}
.nav nav a:hover,.nav nav a.on{color:var(--ink)}
.nav-ink{position:absolute;bottom:2px;height:2px;border-radius:2px;background:var(--wp);transition:left .45s var(--ease),width .45s var(--ease),opacity .3s;opacity:0}
.theme{width:38px;height:38px;border-radius:50%;border:1px solid var(--line-2);background:var(--surface);cursor:pointer;display:grid;place-items:center}
.theme span{width:14px;height:14px;border-radius:50%;background:var(--ink);box-shadow:inset -5px -2px 0 0 var(--surface);transition:transform .5s var(--ease)}
[data-theme="dark"] .theme span{transform:rotate(-140deg)}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:8px;padding:11px 18px;border-radius:999px;border:1px solid var(--line-2);background:var(--surface);
  color:var(--ink);font:600 14.5px var(--body);text-decoration:none;cursor:pointer;transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .2s}
.btn:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:var(--ink-3)}
.btn small{font:500 11px var(--mono);color:var(--ink-3);text-transform:uppercase;letter-spacing:.06em}
.btn.primary{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.btn.primary:hover{box-shadow:0 10px 30px color-mix(in srgb,var(--ink) 28%,transparent)}
.btn.sm{padding:7px 14px;font-size:13px}
.btn[aria-disabled="true"]{cursor:default}

/* hero */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;overflow:hidden;padding:110px 0 90px}
#wind{position:absolute;inset:0;width:100%;height:100%}
.hero-veil{position:absolute;inset:0;background:linear-gradient(100deg,var(--veil) 0%,var(--veil) 42%,transparent 78%)}
.hero-inner{position:relative;width:100%}
.kicker,.eyebrow{font:600 12.5px var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--wp);margin:0 0 18px}
.lede{font-size:clamp(17px,1.5vw,20px);color:var(--ink-2);max-width:52ch;margin:26px 0 10px}
.authors{font-size:14px;color:var(--ink-3);margin:0 0 30px}
.cta{display:flex;flex-wrap:wrap;gap:10px}
.hero-note{position:absolute;right:var(--gutter);bottom:26px;font-size:11.5px;color:var(--ink-3);margin:0;
  background:color-mix(in srgb,var(--surface) 80%,transparent);padding:6px 10px;border-radius:8px;border:1px solid var(--line)}
.scroll-cue{position:absolute;left:50%;bottom:24px;width:26px;height:42px;border:1.5px solid var(--line-2);border-radius:14px;transform:translateX(-50%)}
.scroll-cue span{position:absolute;left:50%;top:8px;width:4px;height:8px;margin-left:-2px;border-radius:2px;background:var(--ink-2);animation:cue 1.8s var(--ease) infinite}
@keyframes cue{0%{opacity:0;transform:translateY(0)}30%{opacity:1}100%{opacity:0;transform:translateY(14px)}}

/* stats strip */
.stats{border-block:1px solid var(--line);background:var(--surface)}
.stats-row{display:grid;grid-template-columns:repeat(5,1fr)}
.stats-row div{padding:28px 18px;border-left:1px solid var(--line);display:flex;flex-direction:column;gap:2px}
.stats-row div:first-child{border-left:0}
.stats-row b{font-size:clamp(28px,3vw,42px);font-weight:600;letter-spacing:-.02em}
.stats-row span{font-size:13.5px;color:var(--ink-3)}

/* reveal */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .9s var(--ease),transform .9s var(--ease)}
.reveal.in{opacity:1;transform:none}
.static{scroll-behavior:auto}.static .hero{min-height:900px}.static .reveal{opacity:1;transform:none;transition:none}.static *{animation:none!important;transition:none!important}.static .ln,.static .pop{opacity:1!important;transform:none!important}.static .draw{stroke-dashoffset:0!important;stroke-dasharray:none!important}.static .dot,.static .hbar .t i{transition:none!important}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.reveal{opacity:1;transform:none;transition:none}*{animation:none!important}}
@media (max-width:900px){.nav nav{display:none}.theme{margin-left:auto}.stats-row{grid-template-columns:repeat(2,1fr)}.stats-row div:nth-child(odd){border-left:0}.hero-note{display:none}}