:root {
  color-scheme: light dark;
  --text: #1a1a1a;
  --muted: #5c5c5c;
  --bg: #ffffff;
  --rule: #e4e4e4;
}

@media (prefers-color-scheme: dark) {
  :root {
    --text: #f0f0f0;
    --muted: #a8a8a8;
    --bg: #121212;
    --rule: #2e2e2e;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

header,
main,
footer {
  width: 100%;
  max-width: 44rem;
  margin: 0 auto;
  padding: 0 1.5rem;
}

header {
  padding-top: 2rem;
}

header a {
  font-weight: 700;
  font-size: 1.25rem;
  text-decoration: none;
  color: inherit;
}

main {
  flex: 1;
  padding-top: 2rem;
  padding-bottom: 3rem;
}

a {
  color: inherit;
}

.muted {
  color: var(--muted);
}

footer {
  padding-top: 1.5rem;
  padding-bottom: 2rem;
  border-top: 1px solid var(--rule);
  font-size: 0.9rem;
  color: var(--muted);
}

footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
}