:root {
  --bg: #ffffff;
  --fg: #1c2024;
  --muted: #5b6570;
  --accent: #0b6ea8;
  --line: #dde2e7;
  --mark: #fff3a8;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14181c;
    --fg: #e6e9ec;
    --muted: #9aa5b0;
    --accent: #6cb8e6;
    --line: #2b333b;
    --mark: #5c4f00;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main, header, footer {
  max-width: 46rem;
  margin: 0 auto;
  padding: 0 16px;
}
header { padding-top: 28px; }
header a.brand {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
}
h1 { font-size: 1.9rem; line-height: 1.25; margin: 0.6em 0 0.4em; }
h2 { font-size: 1.25rem; margin: 2em 0 0.4em; }
p, ul { margin: 0.7em 0; }
a { color: var(--accent); }
.meta { color: var(--muted); font-size: 0.95rem; }
mark { background: var(--mark); color: inherit; padding: 0 3px; border-radius: 3px; }
address { font-style: normal; }
footer {
  margin-top: 3rem;
  padding-top: 1rem;
  padding-bottom: 2rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.95rem;
}
footer a { margin-right: 1rem; }