:root { --bg:#fbfaf7; --fg:#1d2433; --muted:#5b6474; --line:#e4e1d8; --accent:#1f5f8b; }
@media (prefers-color-scheme: dark) { :root { --bg:#14171d; --fg:#e8e6e1; --muted:#a3a9b5; --line:#2a2f38; --accent:#7fb6dd; } }
* { box-sizing: border-box; }
body { margin:0; background:var(--bg); color:var(--fg); font:17px/1.6 system-ui,-apple-system,"Segoe UI",sans-serif; }
main { max-width: 680px; margin: 0 auto; padding: 48px 20px 80px; }
header a { color: var(--fg); text-decoration: none; font-weight: 700; letter-spacing: .02em; }
h1 { font-size: 1.9rem; line-height: 1.25; margin: 40px 0 12px; }
h2 { font-size: 1.15rem; margin: 36px 0 8px; }
p, li { color: var(--fg); } .muted { color: var(--muted); }
a { color: var(--accent); }
.card { border: 1px solid var(--line); border-radius: 10px; padding: 18px 20px; margin: 20px 0; }
footer { margin-top: 56px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--muted); font-size: .9rem; }
.card h2.first { margin-top: 0; }