:root {
  color-scheme: light dark;
  --bg: #0b0d10;
  --panel: #14181d;
  --text: #f2f4f7;
  --muted: #a9b2bd;
  --border: #29313a;
  --link: #8fc7ff;
  --max: 760px;
}
* { box-sizing: border-box; }
html { font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; line-height: 1.6; }
body { margin: 0; background: var(--bg); color: var(--text); }
main { max-width: var(--max); margin: 0 auto; padding: 64px 24px; }
header { margin-bottom: 36px; }
h1 { font-size: clamp(2rem, 6vw, 3rem); line-height: 1.1; margin: 0 0 12px; }
h2 { margin-top: 32px; font-size: 1.2rem; }
p, li { color: var(--muted); }
strong { color: var(--text); }
a { color: var(--link); }
.card { background: var(--panel); border: 1px solid var(--border); border-radius: 14px; padding: 20px; margin: 24px 0; }
nav, footer { display: flex; gap: 18px; flex-wrap: wrap; }
footer { margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--border); font-size: .95rem; }
code { background: var(--panel); border: 1px solid var(--border); border-radius: 6px; padding: .1em .35em; }
@media (prefers-color-scheme: light) {
  :root {
    --bg: #ffffff;
    --panel: #f6f8fa;
    --text: #18202a;
    --muted: #4b5563;
    --border: #d8dee6;
    --link: #075fb7;
  }
}