:root {
  --bg: #ffffff;
  --text: #1c1d22;
  --muted: #5b5f6b;
  --accent: #c2410c;
  --line: #e5e7eb;
  --card: #f7f7f9;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14151a;
    --text: #e8e9ee;
    --muted: #a3a7b3;
    --accent: #fb923c;
    --line: #2a2c35;
    --card: #1c1e25;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
main { max-width: 760px; margin: 0 auto; padding: 48px 16px 72px; }
header { margin-bottom: 32px; }
h1 { font-size: 1.9rem; line-height: 1.25; margin: 0 0 8px; }
h2 { font-size: 1.2rem; margin: 36px 0 8px; }
p, li { color: var(--text); }
.muted { color: var(--muted); font-size: 0.95rem; }
a { color: var(--accent); }
ul { padding-left: 1.2rem; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 16px 18px; margin: 16px 0; }
nav { display: flex; gap: 16px; flex-wrap: wrap; font-size: 0.95rem; margin-bottom: 28px; }
footer { margin-top: 56px; padding-top: 16px; border-top: 1px solid var(--line); font-size: 0.9rem; color: var(--muted); }