HEADER

        
    header{
        grid-area: header;
        grid-column: 1 / 13;
        background: lightseagreen;
    }

MAIN

        
    .gridBody{
        display: grid;
        font-size: 16pt;

        grid-template-areas:
            "header."
            "main aside"
            "footer.";
    }
    main{
        grid-area: main;
        grid-column: 1 / 7;
        background: cornflowerblue;
    }