:root{--ink:#14202b;--muted:#51606e;--bg:#fbfaf7;--card:#fff;--line:#e4e1d8;--accent:#1d5c63;--accent2:#c8553d}
@media (prefers-color-scheme:dark){:root{--ink:#eef1f3;--muted:#a3b0bb;--bg:#10171d;--card:#18222a;--line:#2a3640;--accent:#6fc0c8;--accent2:#ef8a73}}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;font:17px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg)}
a{color:var(--accent)}
.wrap{max-width:860px;margin:0 auto;padding:0 20px}
header{border-bottom:1px solid var(--line)}
header .wrap{display:flex;justify-content:space-between;align-items:center;padding:18px 20px;flex-wrap:wrap;gap:10px}
.brand{font-weight:700;letter-spacing:.2px;color:var(--ink);text-decoration:none;font-size:19px}
.brand span{color:var(--accent2)}
nav a{margin-left:18px;text-decoration:none;color:var(--muted);font-size:15px}
nav a:hover{color:var(--ink)}
.hero{padding:64px 0 40px}
.hero h1{font-size:clamp(30px,5vw,46px);line-height:1.15;margin:0 0 16px;max-width:18em}
.hero p{font-size:19px;color:var(--muted);max-width:36em;margin:0}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;margin:28px 0 8px}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px}
.card h3{margin:0 0 6px;font-size:17px}
.card p{margin:0;color:var(--muted);font-size:15.5px}
h2{font-size:24px;margin:44px 0 10px}
section p,section li{max-width:40em}
footer{margin-top:64px;border-top:1px solid var(--line);padding:24px 0 40px;color:var(--muted);font-size:14.5px}
footer a{color:var(--muted);margin-right:16px}
.doc h1{font-size:34px;margin:48px 0 6px}.doc .date{color:var(--muted);margin:0 0 20px}
.doc h2{font-size:20px;margin:30px 0 6px}