body {
  font-family: Arial, sans-serif;
  margin: 20px;
  background-color: #f9f9f9;
  color: #333;
}

header, footer {
  text-align: center;
  padding: 10px 0;
  background-color: #eee;
  border-radius: 8px;
  margin-bottom: 20px;
}

nav ul {
  list-style: none;
  padding: 0;
  display: flex;
  gap: 20px;
  justify-content: center;
}

nav ul li a {
  text-decoration: none;
  color: #333;
  padding: 10px 15px;
  display: inline-block;
  border-radius: 5px;
}

nav ul li a:hover {
  background-color: #ddd;
  border-radius: 5px;
}