body {
  font-family: sans-serif;
  max-width: 700px;
  margin: 3rem auto;
  line-height: 1.6;
  padding: 0 1rem;
}
h1 {
  font-size: 1.5rem;
  color: #1a202c;
  margin-bottom: 1rem;
}
button {
  padding: 0.5rem 1rem;
  margin-top: 1rem;
}
label {
  display: block;
  margin: 0.25rem 0;
}