.example-container {
  border: 1px solid #c5c5c5;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  grid-template-rows: repeat(3, minmax(40px, auto));
  grid-template-areas:
    'a a a'
    'b c c'
    'b c c';
  grid-gap: 10px;
  width: 200px;
}

.example-container > div {
  background-color: rgba(0, 0, 255, 0.2);
  border: 3px solid blue;
}

#example-element {
  background-color: rgba(255, 0, 200, 0.2);
  border: 3px solid rebeccapurple;
}