:root { --fg:#1f2328; --muted:#6b7280; --line:#e5e7eb; }
* { box-sizing: border-box; }
body { margin:0; font:15px/1.6 -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; color:var(--fg); background:#fff; }
header { display:flex; align-items:center; gap:10px; padding:18px 24px; border-bottom:1px solid var(--line); }
.brand { font-weight:600; letter-spacing:.2px; }
main { max-width:720px; margin:0 auto; padding:56px 24px; }
h1 { font-size:24px; margin:0 0 8px; }
ul { color:var(--muted); }
code { background:#f6f8fa; padding:1px 5px; border-radius:4px; font-size:13px; }
.muted { color:var(--muted); }
footer { border-top:1px solid var(--line); padding:16px 24px; color:var(--muted); font-size:13px; text-align:center; }