:root { --bg: #ffffff; --fg: #1b1f24; --muted: #57606a; --line: #d0d7de; --link: #0b5cad; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #14181d; --fg: #e6e9ed; --muted: #9aa4af; --line: #2f3741; --link: #6cb2ff; }
}
html { background: var(--bg); }
body { margin: 0; color: var(--fg); font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif; }
main { max-width: 46rem; margin: 0 auto; padding: 2rem 1rem 4rem; }
h1 { font-size: 1.6rem; line-height: 1.25; margin: 0.2rem 0 0.3rem; }
h2 { font-size: 1.1rem; margin: 2rem 0 0.4rem; }
p, li { margin: 0.5rem 0; }
.meta { color: var(--muted); font-size: 0.9rem; }
a { color: var(--link); }
footer { border-top: 1px solid var(--line); margin-top: 2.5rem; padding-top: 1rem; color: var(--muted); font-size: 0.9rem; }