:root { --bg:#f2f2f7; --card:#fff; --text:#1c1c1e; --muted:#6c6c70; --green:#248a3d; }
@media (prefers-color-scheme: dark) { :root { --bg:#000; --card:#1c1c1e; --text:#f2f2f7; --muted:#8e8e93; --green:#30d158; } }
* { box-sizing: border-box; }
body { margin:0; background:var(--bg); color:var(--text); font:17px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; }
main { max-width:760px; margin:0 auto; padding:32px 16px 64px; }
h1 { font-size:34px; line-height:1.15; margin:0 0 4px; }
h2 { font-size:22px; margin:32px 0 8px; }
.card { background:var(--card); border-radius:14px; padding:16px 20px; margin:12px 0; }
.muted { color:var(--muted); font-size:15px; }
a { color:var(--green); }
nav { display:flex; gap:16px; margin-bottom:24px; font-size:15px; }
ul { padding-left:20px; }
hr { border:0; border-top:1px solid var(--muted); opacity:.3; margin:40px 0; }