<div class="grid">
  <div class="card"></div>
  <div class="card"></div>
  <div class="card"></div>
  <div class="card"></div>
  <div class="card"></div>
</div>

.grid {
  display: grid;
  gap: 20px;
  max-width: 620px;
  width: 90%;
  margin: 0 auto;
}

@media(min-width: 780px) {
  .grid {
    grid-template-columns: 1fr 1fr;
  }
  .grid :first-child {
    grid-column-end: span 2;
  }
}



.card {
  border-radius: 12px;
  background-color: #0180AE;
  height: 140px;
}
body {
  margin: 2rem 0;
}