:root { color-scheme: light dark; --fg: #111; --muted: #555; --bg: #fff; --card: #f4f4f6; --accent: #7c3aed; }
@media (prefers-color-scheme: dark) { :root { --fg: #eee; --muted: #aaa; --bg: #111; --card: #1c1c1f; } }
* { box-sizing: border-box; }
body { margin: 0; font: 16px/1.65 system-ui, -apple-system, Segoe UI, Roboto, sans-serif; color: var(--fg); background: var(--bg); }
header, main, footer { max-width: 760px; margin: 0 auto; padding: 0 20px; }
header { padding-top: 40px; display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: 12px; }
header a.brand { font-weight: 800; font-size: 1.25rem; color: var(--fg); text-decoration: none; }
nav a { margin-left: 16px; color: var(--accent); text-decoration: none; font-weight: 600; }
h1 { font-size: 2rem; line-height: 1.2; margin: 32px 0 8px; }
h2 { margin-top: 36px; font-size: 1.3rem; }
.card { background: var(--card); border-radius: 12px; padding: 16px 20px; margin: 20px 0; }
.muted { color: var(--muted); }
footer { margin-top: 48px; padding-bottom: 40px; color: var(--muted); font-size: .9rem; border-top: 1px solid var(--card); padding-top: 16px; }
a { color: var(--accent); }