:root { --bg: #fdfcf8; --fg: #1d2333; --muted: #5b6275; --link: #0b6e3a; color-scheme: light dark; }
@media (prefers-color-scheme: dark) { :root { --bg: #12151f; --fg: #eef0f5; --muted: #a3a9b8; --link: #5fd98f; } }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.7 system-ui, sans-serif; }
main { max-width: 42rem; margin: 0 auto; padding: 24px 16px 64px; }
h1 { font-size: 1.5rem; line-height: 1.3; }
h2 { font-size: 1.125rem; margin-top: 2rem; }
a { color: var(--link); }
.small { color: var(--muted); font-size: 0.875rem; }