body {
  font-family: system-ui, sans-serif;
  padding: 20px;
  max-width: 500px;
  margin: auto;
}

section {
  border: 1px solid #ddd;
  padding: 12px;
  margin: 12px 0;
  border-radius: 8px;
}

button {
  margin-top: 6px;
}