body {
  font-family: 'Arial', sans-serif;
  margin: 0;
  background: #faf9f6;
  color: #222;
}
header {
  background: #003366;
  color: #fff;
  padding: 1em 0;
  text-align: center;
}
nav ul {
  list-style: none;
  padding: 0;
}
nav ul li {
  display: inline;
  margin: 0 1em;
}
nav ul li a {
  color: #fff;
  text-decoration: none;
}
main {
  max-width: 800px;
  margin: 2em auto;
  padding: 1em;
  background: #fff;
  border-radius: 8px;
}
footer {
  text-align: center;
  padding: 1em 0;
  background: #eee;
  color: #666;
}