:root { color-scheme: light dark; --bg: #ffffff; --ink: #1d1d1f; --muted: #6e6e73; --accent: #0a64d6; --line: #e5e5ea; }
@media (prefers-color-scheme: dark) { :root { --bg: #121214; --ink: #f2f2f4; --muted: #9b9ea6; --accent: #4da3ff; --line: #2a2a2e; } }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.6 -apple-system, "Helvetica Neue", Arial, sans-serif; }
main { max-width: 720px; margin: 0 auto; padding: 48px 20px 80px; }
h1 { font-size: 34px; margin: 0 0 8px; letter-spacing: -0.02em; } h2 { font-size: 20px; margin: 34px 0 8px; }
p, li { color: var(--ink); } .muted { color: var(--muted); } a { color: var(--accent); }
nav { display: flex; gap: 18px; margin: 0 0 34px; padding-bottom: 14px; border-bottom: 1px solid var(--line); font-size: 15px; }
ul { padding-left: 22px; } footer { margin-top: 46px; color: var(--muted); font-size: 14px; }