.column-target {
  display:flex;
  position:relative;
  width:100%;
}

.content-target {
  display: flex;
  position:relative;
  flex-direction: column;
  width:100%;
  height:100%;
  flex: 1 0;
}

@media screen and (max-width: 767px) {
  .column-target {
    min-width:100%;
    max-width:100%;
  }
}