body {
  padding: 50px;
  font: 14px "Lucida Grande", Helvetica, Arial, sans-serif;
}

.header {
  padding: 10px;
  text-align: center;
  background: darkgray;
  color: white;
  font-size: 20px;
}

.nav {
  background: lightgray;
  padding: 5px;
}

.nav a {
  color: black;
  font-size: 1.2em;
  padding: 1em;
  text-decoration: none;
}

a {
  color: #00B7FF;
}