@media (max-width: 600px) {
    #fixed{
        position:static !important;
    }
}
    .card-header {
        padding: .75rem 1.25rem;
        margin-bottom: 0;
        background-color: rgba(0, 0, 0, .03);
        border-bottom: 1px solid rgba(0, 0, 0, .125);
    }