:root { color-scheme: light dark; --bg: #ffffff; --fg: #1a1f24; --muted: #4a5560; --accent: #0b5a72; }
@media (prefers-color-scheme: dark) { :root { --bg: #062f3f; --fg: #eef3f5; --muted: #b9c7cd; --accent: #8fd3e8; } }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
main { max-width: 42rem; margin: 0 auto; padding: 2.5rem 1.25rem 4rem; }
h1 { font-size: 1.75rem; line-height: 1.25; margin: 0 0 .25rem; }
h2 { font-size: 1.15rem; margin: 2rem 0 .5rem; }
p, li { color: var(--fg); }
.muted { color: var(--muted); }
a { color: var(--accent); }
ol, ul { padding-left: 1.25rem; }