body {
  margin: 0;
}
header {
  background-color: darkblue;
  color: white;
  padding-top: 1.5rem;
  padding-bottom: 1.5rem;
  padding-left: 0.5rem;
  padding-right: 0.5rem;
}
header a {
  text-decoration: none;
  color: white;
}
header h1 {
  margin: 0;
}

main {
  font-family: Helvetica;
  padding: 0.7rem;
}