:root { color-scheme: light dark; --bg: #f7f7f9; --fg: #1d1d22; --muted: #5a5a66; --accent: #7c3aed; --card: #ffffff; --line: #e3e3ea; }
@media (prefers-color-scheme: dark) { :root { --bg: #0f0f14; --fg: #ececf1; --muted: #a5a5b4; --accent: #a78bfa; --card: #17171f; --line: #2a2a36; } }
* { box-sizing: border-box; }
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: 720px; margin: 0 auto; padding: 40px 16px 64px; }
header p { color: var(--muted); margin-top: 0; }
h1 { font-size: 1.8rem; line-height: 1.25; margin: 0 0 8px; }
h2 { font-size: 1.15rem; margin: 32px 0 8px; }
section { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 4px 20px 12px; margin-top: 20px; }
section > h2:first-child { margin-top: 16px; }
a { color: var(--accent); }
ul { padding-left: 20px; }
footer { margin-top: 40px; color: var(--muted); font-size: 0.9rem; }
footer a { margin-right: 16px; }