body {
  font-family: system-ui, sans-serif;
  margin: 0;
  padding: 2rem;
  line-height: 1.6;
}

header {
  max-width: 700px;
}

a {
  display: inline-block;
  margin-top: 1rem;
  text-decoration: none;
  border: 1px solid black;
  padding: 0.5rem 1rem;
}