body {
  font-family: sans-serif;
  background: #f9f9f9;
  padding: 2rem;
  line-height: 1.6;
}
input, select, button {
  margin: 0.5rem 0;
  padding: 0.4rem;
}
pre {
  background: #eee;
  padding: 1rem;
  border-radius: 6px;
}