body {
  font-family: 'Georgia', serif;
  background: #fdfdfd;
  color: #222;
  max-width: 640px;
  margin: 4rem auto;
  padding: 0 1rem;
  line-height: 1.6;
}
h1 {
  font-size: 1.8rem;
}
main {
  padding-top: 2rem;
}