.table-grid .grid-row:nth-child(even) {
    background-color: #1a1a1a !important;
}
@media (min-width: 992px) { /*lg-size*/
    .table-grid .grid-row:nth-child(even) {
        background-color: inherit !important;
    }
    .table-grid .grid-row:nth-child(odd) {
        background-color: #1a1a1a !important;
    }
}