<div class="grid">
  <div>a</div>
  <div>b</div>
  <div>c</div>
  <div>d</div>
</div>
.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-gap: 1rem;
}

.grid > div {
  padding: 2rem;
}

.grid > :first-child {
  background-color: red;
  justify-self: start;
  align-self: end;
  grid-row: 1;
  grid-column: 1;
}

.grid > :nth-child(2) {
  height: 100px;
}

.grid::before {
  z-index: -1;
  content: "";
  background-color: pink;
  grid-row: 1;
  grid-column: 1;
}
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