:root { color-scheme: light dark; --bg: #f6f7f9; --fg: #1d2330; --muted: #6b7385; --accent: #3b6ef5; }
@media (prefers-color-scheme: dark) { :root { --bg: #11141a; --fg: #e6e9ef; --muted: #8a93a6; --accent: #7c9cff; } }
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body { display: flex; flex-direction: column; background: var(--bg); color: var(--fg);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
main { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 24px 16px; text-align: center; }
h1 { margin: 12px 0 4px; font-size: 32px; font-weight: 600; letter-spacing: -0.01em; }
p { margin: 4px 0; }
.muted, footer { color: var(--muted); }
a { color: var(--accent); }
footer { padding: 16px; text-align: center; font-size: 13px; }