body {
    font-family: Arial, sans-serif;
    margin: 0;
    background: #f8f9fa;
    color: #333;
}
header {
    background-color: #004080;
    color: white;
    padding: 1rem;
    text-align: center;
}
nav {
    background-color: #0066cc;
    padding: 0.5rem;
    text-align: center;
}
nav a {
    color: white;
    text-decoration: none;
    margin: 0 15px;
    font-weight: bold;
}
nav a:hover {
    text-decoration: underline;
}
main {
    padding: 2rem;
}
footer {
    background-color: #004080;
    color: white;
    text-align: center;
    padding: 1rem;
    position: relative;
    bottom: 0;
    width: 100%;
}