:root { --bg:#fff; --text:#171717; --muted:#525252; --brand:#047857; --line:#e5e5e5; }
@media (prefers-color-scheme: dark) { :root { --bg:#0a0a0a; --text:#f5f5f5; --muted:#a3a3a3; --brand:#34d399; --line:#262626; } }
* { box-sizing: border-box; }
body { margin:0; background:var(--bg); color:var(--text); font:16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; }
main { max-width: 680px; margin: 0 auto; padding: 32px 16px 64px; }
header a { color: var(--brand); font-weight: 800; font-size: 22px; text-decoration: none; }
nav { margin-top: 4px; font-size: 14px; } nav a { color: var(--muted); margin-right: 16px; }
h1 { font-size: 30px; line-height: 1.2; margin: 32px 0 8px; } h2 { font-size: 19px; margin-top: 28px; }
p, li { color: var(--text); } .muted { color: var(--muted); font-size: 14px; }
a { color: var(--brand); } hr { border: 0; border-top: 1px solid var(--line); margin: 32px 0; }