html {
    scroll-behavior: smooth;
    font-family: Helvetica, sans-serif, Arial;
}

body {
    margin: 0;
    padding: 0;
    background-color: #000000;
}

@media (min-width: 768px) {
    body {
        max-width: 1200px;
        margin: 0 auto;
        padding: 20px; 
        background-image: url('desktop-image.jpg'); 
        background-size: cover;
        background-repeat: no-repeat;
        background-attachment: fixed;
        background-position: center center;
    }
}

@media (max-width: 767px) {
    body {
        padding: 10px;
        background-image: url('mobile-image.jpg');
        background-size: cover;
        background-repeat: no-repeat;
        background-attachment: fixed;
        background-position: center center;
    }
}