body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: #f5f5f5;
  color: #333;
}

header {
  background: #222;
  color: #fff;
  padding: 15px;
}

nav a {
  color: #ccc;
  margin-right: 10px;
  text-decoration: none;
}

nav a:hover {
  color: #fff;
}

main {
  padding: 20px;
  background: #fff;
  margin: 20px;
  border-radius: 6px;
}

footer {
  text-align: center;
  padding: 10px;
  color: #777;
}