body {
background-color: #f0f8ff;
font-family: Arial, sans-serif;
margin: 0;
padding: 20px;
line-height: 1.6;
}

header {
background-color: #4682b4;
color: white;
padding: 20px 0;
text-align: center;
margin-bottom: 20px;
}

nav a {
color: white;
text-decoration: none;
margin: 0 10px;
}

nav a:hover {
text-decoration: underline;
}

main {
max-width: 800px;
margin: 0 auto;
padding: 20px;
background-color: white;
border-radius: 8px;
box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

footer {
text-align: center;
margin-top: 20px;
padding: 10px;
color: #666;
}