:root {
  color-scheme: light dark;
  --max-width: 720px;
  --text: #1f2933;
  --background: #ffffff;
  --muted: #667085;
  --link: #2563eb;
}

@media (prefers-color-scheme: dark) {
  :root {
    --text: #e5e7eb;
    --background: #111827;
    --muted: #9ca3af;
    --link: #93c5fd;
  }
}

* {
  box-sizing: border-box;
}

body {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1rem;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: var(--background);
}

a {
  color: var(--link);
}

.site-header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 3rem;
}

.site-title {
  font-weight: 700;
  text-decoration: none;
}

footer {
  margin-top: 4rem;
  color: var(--muted);
  font-size: 0.9rem;
}