:root {
  color-scheme: dark;
  --bg: #0e0f12;
  --panel: #15171c;
  --line: #262a33;
  --text: #e7e9ee;
  --muted: #8a93a3;
  --accent: #ffaa00;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, sans-serif; }
main { max-width: 720px; margin: 4rem auto; padding: 0 1.25rem; }
h1 { font-size: 3rem; margin: 0; letter-spacing: 0.04em; color: var(--accent); }
.tag { color: var(--muted); margin-top: 0.25rem; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 12px;
  padding: 1.25rem 1.5rem; margin-top: 1.5rem; }
.card h2 { margin-top: 0; }
code { background: #000; padding: 0.4rem 0.7rem; border-radius: 6px;
  font-size: 1.1rem; display: inline-block; color: var(--accent); }
ul { line-height: 1.7; }
.muted { color: var(--muted); font-size: 0.9rem; }
footer { margin-top: 2rem; text-align: center; }