body {
  font-family: Arial, sans-serif;
  margin: 40px;
  background: #f5f5f5;
}
h1 {
  color: #2c3e50;
}
nav a {
  margin-right: 10px;
  text-decoration: none;
  color: #3498db;
}
ul li {
  margin: 8px 0;
}