body {
  font-family: system-ui, sans-serif;
  max-width: 40rem;
  margin: 4rem auto;
  padding: 0 1rem;
  color: #1a1a1a;
}

nav {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
}

nav a {
  color: #0b5fff;
  text-decoration: none;
}

nav a:hover {
  text-decoration: underline;
}

footer {
  margin-top: 3rem;
  font-size: 0.85rem;
  color: #666;
}