/* Default styles for all devices */
body {
    background-size: cover;
    background-position: top;
    background-repeat: no-repeat;
}

/* Media query for mobile devices */
@media only screen and (max-width: 600px) {
    body {
        background-image: url('phone.png');
    }
}

/* Media query for tablets */
@media only screen and (min-width: 601px) and (max-width: 1024px) {
    body {
        background-image: url('ipad.png');
    }
}

/* Media query for desktop devices */
@media only screen and (min-width: 1025px) {
    body {
        background-image: url('BACK.png');
    }
}