<div class=four-column>

</div>

<style>
div.single > div.cell {
  width: auto;
}

div.four-equal > div.cell {
  width: 25%;
}

@media (max-width: 750px) {
  div.four-equal > div.cell, div.two-equal > div.cell {
    display: block;
    width: auto;
  }
  div.four-equal > div.cell {
    margin-bottom: 50px;
  }
}

.four-column {
  column-count: 4;
}

@media (max-width: 1600px) {
  .four-column {
    column-count: 3;
  }
}

@media (max-width: 1200px) {
  .four-column {
    column-count: 2;
  }
}

@media (max-width: 800px) {
  .four-column {
    column-count: 1;
  }
}
</style>