.item1 { grid-area: header; }
.item2 { grid-area: title; }
.item3 { grid-area: main; }
.item4 { grid-area: footer; }

.grid-container {
  display: grid;
  grid-template-areas:
    'header header header header header header'
    'title title title title title title'
    'main main main main main main'
    'footer footer footer footer footer footer';
  gap: 10px;
  background-color: #0f89ec;
  padding: 10px;
}

.grid-container > div {
  background-color: rgba(255, 255, 255, 0.8);
  padding: 20px 20px;
  font-size: 30px;
}