body {
  background: #fafafa;
  font-family: Arial, sans-serif;
  margin: 40px auto;
  max-width: 800px;
  line-height: 1.6;
}

header, footer {
  text-align: center;
}

nav a {
  color: #0066cc;
  text-decoration: none;
}
nav a:hover {
  text-decoration: underline;
}