@media (max-width: 780px) {
    /* Generic class for container (strings) */
    .mobile-two-columns {
        display: flex !important;
        flex-direction: row !important;
        flex-wrap: wrap !important;
        justify-content: center !important;
        width: 100% !important;
    }

    .mobile-two-columns > .panel-grid-cell {
        flex: 0 0 calc(50% - 10px) !important; 
        max-width: calc(50% - 10px) !important;
        margin: 5px !important;
        box-sizing: border-box !important;
    }

    .mobile-two-columns .cl-btn {
        display: block !important;
        width: 100% !important;
        text-align: center !important;
        padding-left: 0 !important;
        padding-right: 0 !important;
    }
}