@media (max-width: 767px) {
  [class*="col-"] {
    width: 100% !important;
    max-width: 100% !important;
    flex: 0 0 100% !important;
    margin: 0 !important;
    padding-left: 10px;
    padding-right: 10px;
    display: block !important;
  }
}