:root { --bg:#f5f5f7; --card:#ffffff; --text:#1d1d1f; --muted:#6e6e73; --accent:#d97706; }
@media (prefers-color-scheme: dark) {
  :root { --bg:#141519; --card:#24262c; --text:#f5f5f7; --muted:#a1a1a6; --accent:#ff9500; }
}
* { box-sizing: border-box; }
body { margin:0; background:var(--bg); color:var(--text);
  font:17px/1.55 -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif; }
main { max-width:720px; margin:0 auto; padding:40px 16px 60px; }
header { text-align:center; margin-bottom:32px; }
header img { width:96px; height:96px; border-radius:22px; }
h1 { margin:12px 0 4px; font-size:32px; }
.sub { color:var(--muted); margin:0; }
nav { text-align:center; margin:16px 0 32px; }
nav a { margin:0 10px; }
a { color:var(--accent); }
section { background:var(--card); border-radius:16px; padding:20px 24px; margin-bottom:16px; }
h2 { font-size:21px; margin:0 0 8px; }
h3 { font-size:17px; margin:16px 0 4px; }
p, li { margin:6px 0; }
footer { text-align:center; color:var(--muted); font-size:14px; margin-top:32px; }