:root { --bg: #fafaf9; --fg: #1c1917; --muted: #57534e; --accent: #2563eb; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #1c1917; --fg: #f5f5f4; --muted: #a8a29e; --accent: #60a5fa; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 17px/1.6 system-ui, sans-serif; }
main { max-width: 680px; margin: 0 auto; padding: 48px 16px; }
h1 { font-size: 2rem; line-height: 1.2; }
a { color: var(--accent); }
.note { color: var(--muted); font-size: 0.9rem; }