:root { --bg:#f8fafc; --fg:#0f172a; --muted:#475569; --accent:#0f766e; --card:#ffffff; --line:#e2e8f0; }
@media (prefers-color-scheme: dark) { :root { --bg:#0b1220; --fg:#e2e8f0; --muted:#94a3b8; --accent:#5eead4; --card:#111a2e; --line:#1e293b; } }
* { box-sizing: border-box; }
body { margin:0; background:var(--bg); color:var(--fg); font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif; }
main { max-width:720px; margin:0 auto; padding:48px 16px 64px; }
header { display:flex; align-items:center; gap:16px; margin-bottom:32px; }
header img { width:64px; height:64px; }
header h1 { margin:0; font-size:28px; }
header p { margin:0; color:var(--muted); }
h2 { margin-top:32px; font-size:20px; }
a { color:var(--accent); }
.card { background:var(--card); border:1px solid var(--line); border-radius:12px; padding:20px 24px; }
footer { margin-top:48px; padding-top:16px; border-top:1px solid var(--line); color:var(--muted); font-size:14px; }
footer a { margin-right:16px; }
code { font-size:14px; }