.item1 {
    grid-area: header;
}

.item2 {
    grid-area: menu;
}

.item3 {
    grid-area: main;
}

.item4 {
    grid-area: right;
}

.item5 {
    grid-area: footer;
}

.grid-container {
    display: grid;
    grid-template-areas:
    'header header header header header header'
    'menu main main main main right'
    'menu footer footer footer footer footer';
    gap: 10px;
    background-color: whitesmoke;
    padding: 10px;
}

.grid-container > div {
    background-color: rgba(255, 255, 255, 0.8);
    text-align: center;
    padding: 20px 0;
    font-size: 30px;
}