@media only screen and (max-width: 576px) {
    .card{
        margin-left: 4rem;
        margin-right: 4rem;
    }
}

@media only screen and (max-width: 450px) {
    .card{
        margin-left: 2rem;
        margin-right: 2rem;
    }
}

@media only screen and (max-width: 350px) {
    .card{
        margin-left: 1rem;
        margin-right: 1rem;
    }
}