body {
font-family: Arial, sans-serif;
margin: 40px;
background-color: #f4f4f4;
}

header {
margin-bottom: 20px;
}

nav {
margin-bottom: 20px;
}

nav a {
margin-right: 20px;
text-decoration: none;
font-weight: bold;
color: #333;
}

section {
background: white;
padding: 20px;
border-radius: 5px;
}

footer {
margin-top: 20px;
font-size: 12px;
color: #666;
}