:root {
  --bg: #fafaf9;
  --fg: #1c1917;
  --muted: #57534e;
  --link: #1d4ed8;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1917;
    --fg: #f5f5f4;
    --muted: #a8a29e;
    --link: #93c5fd;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif;
}

main {
  max-width: 40rem;
  margin: 0 auto;
  padding: 3rem 1rem;
}

h1 { margin-top: 0; }
h2 { margin-top: 2rem; font-size: 1.15rem; }
a { color: var(--link); }
.meta { color: var(--muted); }

nav {
  display: flex;
  gap: 1.5rem;
  margin-top: 2.5rem;
}