body {
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: #f0f4ff;
}

nav {
    background-color: #002868; /* dark blue */
    text-align: center;
    padding: 15px;
}

nav a {
    color: white;
    text-decoration: none;
    margin: 15px;
    font-weight: bold;
}

nav a:hover {
    color: #bf0a30; /* red */
}

main {
    padding: 20px;
}

section {
    margin-bottom: 30px;
}

/* RESPONSIVE DESIGN */
@media (max-width: 768px) {
    nav a {
        display: block;
        margin: 10px 0;
    }

    .banner h1 {
        font-size: 1.8em;
    }
}