.dashboard-content {
    position: absolute;
    left: 70px;
    top: 55px;
    right: 0;
    bottom: 55px;
}

@media (max-width:767.98px) {
    .dashboard-content {
        left: 0px;
    }
}

.centered {
    position: fixed;
    top: 50%;
    left: 50%;
    /* bring your own prefixes */
    transform: translate(-50%, -50%);
}