.modal-dialog{
    width: 100%;
}

.modal-mss{
    background-color: white;
    background-image:url("../../../../../../../../campaigns/2021/AW2021/w38/MSS/MSS_Home_Modal01_01_mobile_all.jpg");
    background-position: 0 0;
    background-repeat: no-repeat;
    background-size: cover;
}

@media (min-width: 768px) {

    .modal-mss{
        background-image:url("../../../../../../../../campaigns/2021/AW2021/w38/MSS/MSS_Home_Modal01_01_desktop_all.jpg");
    }
}