body {
    font-family: 'Verdana', sans-serif;
    background-color: <?php echo $backgroundColor; ?>;
    color: white;
}
header {
background-image: url('https://picsum.photos/1200/400');
    background-size: cover;
    background-position: center;
    background: linear-gradient(45deg, #ff6f00, #ffeb3b);
    padding: 20px;
    text-align: center;
    color: white;
    font-size: 1.5em;
}
nav {
    display: flex;
    justify-content: center;
    background-color: #ff6f00;
}
nav a {
    color: white;
    padding: 15px 30px;
    text-decoration: none;
}
nav a:hover {
    background-color: #ffeb3b;
    color: black;
}