@media (min-width: 51em) {
  .fpguides {
    grid-template-columns: 1fr 1fr;
    grid-auto-rows: auto 270px 270px 270px 270px 270px;
  }
}
@media (min-width: 85.6em) {
  .fpguides {
    grid-template-columns: 1fr 1fr 1fr;
    grid-auto-rows: auto 420px 420px 420px;
  }
}