@media (min-width: 761px) {
  .page-projects .gallery-card:nth-child(n + 3) {
    grid-column: span 6;
  }
}

@media (min-width: 521px) and (max-width: 760px) {
  .page-projects .gallery-card:last-child {
    grid-column: 1 / -1;
  }
}