body {
  font-family: sans-serif;
  margin: 0;
  padding: 0;
  background: #fafafa;
  color: #222;
}
header {
  background: #ddeeff;
  padding: 1.5rem;
  text-align: center;
}
header a {
  text-decoration: none;
  color: #222;
}
nav a {
  margin: 0 1rem;
  text-decoration: none;
  color: #005577;
}
main {
  padding: 2rem;
}
footer {
  background: #eee;
  text-align: center;
  padding: 1rem;
  margin-top: 2rem;
}