:root { --bg: #f8fafc; --fg: #0f172a; --muted: #64748b; --link: #2563eb; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #0b1220; --fg: #e2e8f0; --muted: #94a3b8; --link: #60a5fa; }
}
* { 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: 760px; margin: 0 auto; padding: 32px 16px 64px; }
h1 { font-size: 2rem; line-height: 1.25; margin: 0 0 12px; }
h2 { font-size: 1.2rem; margin: 32px 0 8px; }
.lead { font-size: 1.1rem; }
.en { display: block; color: var(--muted); }
h1 .en { display: inline; font-size: 1.1rem; font-weight: 600; }
.muted { color: var(--muted); }
a { color: var(--link); }
li { margin-bottom: 10px; }