.item1 {
    grid-area: header1;
    padding: 10px;
}

.item2 {
    grid-area: header2;
    background-color: #444;
    padding: 10px;
    color: white;
    overflow: hidden;
}

.item3 {
    grid-area: header3;
    background-color: #EDF0EE;
    padding: 5px 5px 5px 10px;    
    color: black;
    overflow: hidden;
    margin-bottom: 10px;
}

.item4 {
    grid-area: main;
    background-color: white;
}

.item5 {
    grid-area: footer;
    background-color: #F6F7F6;
    padding: 20px 0 0 0;
}

.grid-container {
    display: grid;
    grid-template-areas:
        'header1'
        'header2'
        'header3'
        'main'
        'footer';
    gap: 0px;
    padding: 0px;
}

    .grid-container > div {
        text-align: center;
    }

/*-------------------- Desktop --------------------*/
@media screen and (min-width: 800px) {

    .item4 {
        min-height: 600px;
    }
}

/*-------------------- Mobile --------------------*/
@media screen and (max-width: 800px) {

    .item4 {
        min-height: 400px;
    }
}