:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1b1f24;
  --muted: #57606a;
  --line: #d0d7de;
  --accent: #0b5cad;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1419;
    --fg: #e6edf3;
    --muted: #9aa5b1;
    --line: #2d333b;
    --accent: #6cb6ff;
  }
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: Verdana, Tahoma, Arial, sans-serif;
  line-height: 1.65;
}
main {
  max-width: 46rem;
  margin: 0 auto;
  padding: 2rem 1rem 4rem;
}
header nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  border-bottom: 1px solid var(--line);
  padding: 1rem;
  max-width: 46rem;
  margin: 0 auto;
}
a {
  color: var(--accent);
}
h1 {
  font-size: 1.6rem;
  line-height: 1.25;
}
h2 {
  font-size: 1.15rem;
  margin-top: 2rem;
}
.muted {
  color: var(--muted);
  font-size: 0.9rem;
}
footer {
  max-width: 46rem;
  margin: 0 auto;
  padding: 1rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.85rem;
}