body {
  font-family: sans-serif;
  margin: 0;
}

header.main-header {
  display: block;
  padding: 4px;
  background-color: #0ad;
}

a {
  text-decoration: none;
}

a:hover,
a:focus {
  text-decoration: underline;
}

main.page {
  margin: 8px;
}