body {
  font-family: system-ui, sans-serif;
  max-width: 40rem;
  margin: 2rem auto;
  padding: 0 1rem;
  line-height: 1.5;
  color: #1a1a1a;
}

button {
  margin-top: 1rem;
  padding: 0.5rem 1rem;
  font-size: 1rem;
  cursor: pointer;
  background: #2563eb;
  color: #fff;
  border: none;
  border-radius: 6px;
}

button:hover {
  background: #1d4ed8;
}