.layout--fourcol .grid-row .col { flex-basis: 25% }

/* Multi-row border options */
.layout--fourcol .grid-row.column-borders-top-row .col:nth-child(n+5) > .block:first-child,
.layout--fourcol .grid-row.column-borders-bottom-row .col:nth-child(-n+4) > .block:first-child {
  border-top: none;
  padding-top: 0;
}

@media screen and (max-width: 960px) {
  .layout--fourcol .grid-row .layout__region--first,
  .layout--fourcol .grid-row .layout__region--second {
    flex-basis: 50%;
  }

  .layout--fourcol .grid-row .layout__region--third,
  .layout--fourcol .grid-row .layout__region--fourth {
    flex-basis: 100%;
  }
}

@media screen and (max-width: 640px) {
  .layout--fourcol .grid-row .col {
    flex-basis: 100%;
  }
}