body {
  font-family: Arial, Helvetica, sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
}

header,
section {
  width: 100%;
  max-width: 32rem;
}

h1 {
  text-align: center;
}

input[type="button"] {
  background-color: white;
  color: black;
  border: 1px solid black;
  border-radius: 0.25rem;
  padding: 0.25rem 0.5rem;
  margin: 0.25rem 0;
  cursor: pointer;
}