div#cwb-media_card_container > div {
  /*flex-basis: 33.33%;*/
  /*max-width: 33.33% !important;*/
  min-width: 25%;
  margin-bottom: 2rem;
  flex: 1;
}

@media only screen and (max-width: 600px) {
  div#cwb-media_card_container > div {
    min-width: 100%;
  }
}