body {
  font-family: system-ui, -apple-system, sans-serif;
  max-width: 640px;
  margin: 4rem auto;
  padding: 0 1rem;
  color: #1a1a1a;
}

pre {
  background: #f4f4f4;
  padding: 0.75rem 1rem;
  border-radius: 6px;
  overflow-x: auto;
}