:root { color-scheme: light dark; --bg: #f4f7fd; --fg: #0b1a3d; --muted: #4a5a7a; --accent: #1f58c2; }
@media (prefers-color-scheme: dark) { :root { --bg: #0f2f73; --fg: #ffffff; --muted: #b9d0f5; --accent: #ffd84a; } }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.6 system-ui, -apple-system, sans-serif; }
main { max-width: 720px; margin: 0 auto; padding: 32px 16px 64px; }
h1 { font-size: 28px; margin: 0 0 4px; }
h2 { font-size: 20px; margin: 28px 0 8px; }
p, li { color: var(--fg); }
small, .muted { color: var(--muted); }
a { color: var(--accent); }
nav { margin-bottom: 24px; display: flex; gap: 16px; }