:root { --bg: #ffffff; --text: #1a1a1a; --muted: #5a5a5a; --link: #1d4ed8; }
@media (prefers-color-scheme: dark) { :root { --bg: #111214; --text: #ececec; --muted: #a3a3a3; --link: #7aa2ff; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 17px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif; }
main { max-width: 680px; margin: 0 auto; padding: 48px 16px 64px; }
h1 { font-size: 1.8rem; line-height: 1.2; margin: 0 0 8px; }
h2 { font-size: 1.15rem; margin: 32px 0 8px; }
p, li { color: var(--text); }
.muted { color: var(--muted); }
a { color: var(--link); }