body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}

header {
  background-color: #333;
  padding: 10px;
}

header nav a {
  color: #fff;
  margin-right: 15px;
  text-decoration: none;
}

.container {
  padding: 20px;
}

footer {
  background-color: #f1f1f1;
  padding: 10px;
  text-align: center;
}