@media screen and (max-width: 480px) {
    .card1 {
        width:32px;
        height:32px;
    }
}

@media screen and (max-width: 450px) {
    .card1 {
        width:48px;
        height:48px;
    }
}

@media screen and (min-width: 450px) {
    .card1 {
        width:96px;
        height:96px;
    }
}