:root { --bg: #fafaf8; --text: #1d1d1b; --muted: #5c5c57; --link: #1f5fbf; }
@media (prefers-color-scheme: dark) { :root { --bg: #18181a; --text: #ececea; --muted: #a3a39e; --link: #7fb0ff; } }
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: 1.9rem; line-height: 1.2; margin: 0 0 12px; }
h2 { font-size: 1.15rem; margin: 32px 0 8px; }
.lead { color: var(--muted); }
a { color: var(--link); }
li { margin-bottom: 6px; }