:root{color-scheme:light dark;--bg:#fff;--fg:#111;--muted:#666;--card:#f4f4f6;--accent:#0a7cff}
@media(prefers-color-scheme:dark){:root{--bg:#000;--fg:#f2f2f2;--muted:#9a9a9f;--card:#1c1c1e;--accent:#4aa3ff}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI",system-ui,sans-serif}
main{max-width:720px;margin:0 auto;padding:32px 16px 64px}
h1{font-size:32px;line-height:1.2;margin:0 0 8px}h2{font-size:21px;margin:32px 0 8px}
p,li{color:var(--fg)}.muted{color:var(--muted)}
a{color:var(--accent)}
header{display:flex;align-items:center;gap:16px;margin-bottom:24px}
header img{width:72px;height:72px;border-radius:16px}
.card{background:var(--card);border-radius:14px;padding:16px 20px;margin:12px 0}
nav{margin-top:40px;font-size:15px}nav a{margin-right:16px}
code{background:var(--card);padding:1px 5px;border-radius:5px}