:root {
  color-scheme: dark;
  --bg: #0b0f14;
  --surface: #111821;
  --border: #1e2a36;
  --text: #e6edf3;
  --muted: #9aaabb;
  --link: #38bdf8;
}
@media (prefers-color-scheme: light) {
  :root { --bg: #f6f7f9; --surface: #ffffff; --border: #dde3ea; --text: #15202b; --muted: #55657a; --link: #0369a1; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.55 Inter, system-ui, -apple-system, "Segoe UI", sans-serif; }
main { max-width: 760px; margin: 0 auto; padding: 32px 20px 56px; }
h1 { font-size: 28px; margin: 8px 0 20px; }
h2 { font-size: 18px; margin: 28px 0 8px; }
p, ul { margin: 0 0 12px; }
ul { padding-left: 22px; }
a { color: var(--link); }
.back a { font-size: 14px; color: var(--muted); text-decoration: none; }
.back a:hover { color: var(--text); }
.meta { margin-top: 36px; padding-top: 14px; border-top: 1px solid var(--border); font-size: 13px; color: var(--muted); }