.grid.grid--alpha
  .item 1
  .item 2
  .item 3
  .item 4
  .item.item--alpha 5
  .item 6
  
.grid.grid--beta
  .item 1
  .item 2
  .item 3
  .item.item--alpha 4

.grid {
  display: grid;
  gap: 1rem;
  max-width: 50em;
  margin: 1rem auto;
}

.grid--alpha {
  grid-template-columns: repeat(4, 1fr);
}

.grid--beta {
  grid-template-columns: repeat(3, 1fr);
}

.item {
  background-color: dodgerblue;
  color: gold;
  font-size: 3rem;
  aspect-ratio: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

.item--alpha {
  grid-column-start: 2;
  border: 1rem solid wheat;
  
  ~ .item {
    border: 1rem solid wheat;
  }
}