:root{--bg:#fbfaf7;--ink:#1d2321;--muted:#5b6461;--line:#e3e0d8;--accent:#1f6f5c;--accent-ink:#fff;--card:#fff}
@media (prefers-color-scheme:dark){:root{--bg:#131715;--ink:#eef1ef;--muted:#a3ada9;--line:#2a312e;--accent:#4fb79b;--accent-ink:#0d1210;--card:#1a1f1d}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
a{color:var(--accent)}
.wrap{max-width:880px;margin:0 auto;padding:0 20px}
header{border-bottom:1px solid var(--line)}
header .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{font-weight:700;font-size:20px;letter-spacing:-.01em;text-decoration:none;color:var(--ink)}
.brand span{color:var(--accent)}
nav a{color:var(--muted);text-decoration:none;margin-left:20px;font-size:15px}
nav a:hover{color:var(--ink)}
.hero{padding:72px 0 48px}
.hero h1{font-size:clamp(32px,6vw,52px);line-height:1.1;letter-spacing:-.02em;margin:0 0 16px;max-width:16ch}
.hero p{font-size:20px;color:var(--muted);max-width:56ch;margin:0}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:16px;padding:24px 0 56px}
.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:15px}
section h2{font-size:24px;letter-spacing:-.01em;margin:40px 0 8px}
.doc{padding:48px 0 64px}
.doc h1{font-size:36px;letter-spacing:-.02em;margin:0 0 4px}
.doc .meta{color:var(--muted);margin:0 0 32px;font-size:15px}
.doc h2{font-size:21px;margin:32px 0 8px}
.doc li{margin:4px 0}
footer{border-top:1px solid var(--line);color:var(--muted);font-size:14px}
footer .wrap{display:flex;flex-wrap:wrap;gap:8px 20px;justify-content:space-between;padding:24px 20px}
footer a{color:var(--muted)}