body {
  font-family: Helvetica, Arial, sans-serif;
  max-width: 800px;
  margin: 40px auto;
  line-height: 1.6;
  color: #222;
}
nav a {
  text-decoration: none;
  color: #004080;
  padding: 0 8px;
}
nav a:hover {
  text-decoration: underline;
}
h1 {
  color: #004080;
}