:root{
  --bg:#FAF8F2; --ink:#0B2A6B; --ink2:#3A4E7A; --mute:#6B7A9C;
  --y:#FFD400; --ysoft:#FFF3B0; --line:#DCD9CE; --chip:#EEEBE1; --foot:#0B2A6B;
  --serif:"Source Serif 4",Georgia,serif; --sans:"Hanken Grotesk",system-ui,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit}
p{color:var(--ink2)}

/* top bar: pills left, wordmark centre, pills right */
.top{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;padding:26px 80px}
.pills{display:flex;gap:8px}
.pills.r{justify-content:flex-end}
.pill{font-size:14px;padding:5px 16px;border:1px solid var(--line);border-radius:999px;background:var(--chip);text-decoration:none;white-space:nowrap}
.pill:hover{background:#E4E0D3}
.pill.on{background:var(--ink);color:#fff;border-color:var(--ink)}
.wordmark{display:block;width:78px;color:var(--ink)}
.wordmark svg{width:100%;height:auto;display:block}

/* hero */
.hero{text-align:center;padding:90px 24px 70px}
.title{display:inline-flex;align-items:center;gap:20px;font-family:var(--serif);font-weight:600;font-size:clamp(48px,7vw,84px);line-height:1;letter-spacing:-.025em}
.mark{width:clamp(52px,6vw,78px);height:auto;flex:none}
.sub{font-family:var(--serif);font-size:21px;color:var(--ink);max-width:36ch;margin:24px auto 0;line-height:1.4}
.btns{display:flex;justify-content:center;gap:14px;margin-top:34px;flex-wrap:wrap}
.b{font-size:17px;padding:6px 24px;border-radius:7px;text-decoration:none;border:1px solid transparent}
.b1{background:var(--ink);color:#fff}
.b1:hover{background:#13388A}
.b2{background:var(--chip);border-color:var(--line)}
.b2:hover{background:#E4E0D3}

/* single column */
.col{max-width:680px;margin:0 auto;padding:0 24px}
h2{font-size:30px;font-weight:700;letter-spacing:-.01em;margin:90px 0 26px}
h3{font-size:19px;font-weight:700;margin:40px 0 14px}
.col>p,.prose p{font-family:var(--serif);font-size:18px;line-height:1.65;margin-bottom:18px}
.prose a{text-underline-offset:3px}

/* updates list */
.updates{border-top:1px solid var(--line)}
.u{padding:30px 0;border-bottom:1px solid var(--line)}
.u-meta{display:flex;gap:12px;align-items:center;font-size:14px;color:var(--mute)}
.tag{background:var(--ink);color:#fff;font-size:12px;padding:1px 8px;border-radius:3px}
.u h4{font-size:22px;margin:8px 0 6px;letter-spacing:-.01em}
.u p{font-size:17px}
.more{display:inline-block;margin-top:16px;font-size:14px;padding:3px 16px;border-radius:5px;background:var(--chip);border:1px solid var(--line);text-decoration:none}
.more:hover{background:#E4E0D3}

/* figure table, benchmark style */
.wide{max-width:900px;margin:40px auto 0;padding:0 24px;overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:15px;background:#fff}
th,td{border:1px solid var(--line);padding:12px 14px;text-align:left;vertical-align:top}
th{font-weight:700;background:var(--bg)}
td b{display:block;font-size:14px}
td small{display:block;color:var(--mute);font-size:12px;line-height:1.35}
td.hi{background:var(--ysoft);font-weight:700}
.tnote{max-width:680px;margin:16px auto 0;padding:0 24px;font-size:13px;color:var(--mute);text-align:center;line-height:1.5}

/* diagram */
.diagram{margin:30px 0 8px;display:grid;grid-template-columns:1fr auto 1fr;gap:16px;align-items:center;font-size:14px}
.dcol{display:grid;gap:8px}
.dcol span{background:#fff;border:1px solid var(--line);border-radius:6px;padding:8px 12px}
.dcore{width:118px;height:118px;border-radius:50%;background:var(--ink);color:#fff;display:grid;place-content:center;text-align:center;font-weight:700;box-shadow:0 0 0 8px var(--y)}
.dcore small{display:block;font-weight:400;font-size:11px;color:var(--y);letter-spacing:.06em;text-transform:uppercase}

/* model cards on overview */
.models{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:10px}
.mcard{display:block;text-decoration:none;background:#fff;border:1px solid var(--line);border-radius:12px;padding:30px;transition:border-color .2s ease}
.mcard:hover{border-color:var(--ink)}
.mcard .mark{width:44px}
.mcard h4{font-family:var(--serif);font-weight:500;font-size:38px;margin:14px 0 4px;letter-spacing:-.02em}
.mcard p{font-size:16px}
.mcard .fig{margin-top:18px;padding-top:14px;border-top:1px solid var(--line);font-size:14px;color:var(--mute)}
.mcard .fig b{color:var(--ink);font-size:20px;margin-right:6px}

/* faq */
.faq{max-width:1280px;margin:110px auto 0;padding:0 80px 100px;display:grid;grid-template-columns:1fr 1.3fr;gap:40px}
.faq h2{margin:0;font-size:26px}
details{border-bottom:1px solid var(--line)}
summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;gap:20px;padding:16px 0;font-weight:700;font-size:16px}
summary::-webkit-details-marker{display:none}
summary::after{content:"";width:9px;height:9px;border-right:1.5px solid var(--ink);border-bottom:1.5px solid var(--ink);transform:rotate(45deg);margin-top:4px;flex:none;transition:transform .2s ease}
details[open] summary::after{transform:rotate(-135deg);margin-top:9px}
details p{font-family:var(--serif);font-size:17px;padding:0 0 18px}

/* footer */
.foot{background:var(--foot);color:#D6DEF0;padding:70px 80px 40px}
.foot-in{max-width:1280px;margin:0 auto;display:grid;grid-template-columns:1fr 2fr;gap:40px}
.foot .wordmark{color:#fff;width:90px}
.foot nav a{display:flex;justify-content:space-between;padding:12px 0;border-bottom:1px solid rgba(255,255,255,.15);text-decoration:none;font-size:15px}
.foot nav a:hover{color:var(--y)}
.legal{max-width:1280px;margin:50px auto 0;display:grid;grid-template-columns:1fr 2fr;gap:40px;font-size:13px;color:#A9B6D6}
.legal p{color:#A9B6D6}

@media (max-width:900px){
  .top{padding:18px 20px;grid-template-columns:auto 1fr}
  .pills.l{grid-row:2;grid-column:1/-1;margin-top:14px}
  .wordmark{width:64px}
  .faq{grid-template-columns:1fr;padding:0 24px 80px}
  .foot{padding:50px 24px 30px}
  .foot-in,.legal{grid-template-columns:1fr}
}
@media (max-width:620px){
  .models{grid-template-columns:1fr}
  .diagram{grid-template-columns:1fr;justify-items:center}
  .dcol{width:100%}
  .hero{padding:60px 20px 40px}
  .sub{font-size:19px}
  h2{margin-top:64px}
  .pills.r .pill:not(.on){display:none}
}