html
{
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
}
body {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    background-color: rebeccapurple;
    overflow: auto;
}
main
{
    width: 100%;
    height: 100%;
    display: grid;
    grid-template-areas:
        'header'
        'section'
        'footer';
    grid-template-rows: 10% 70% 20%;
    grid-template-columns: 100%;
}
main header
{
    grid-area: header;
}
main section
{
    grid-area: section;
    display: grid;
    grid-template-areas: 
        'leftaside'
        'canvas'
        'rightaside';
    grid-template-rows: 100%;
    grid-template-columns: 10% 80% 10%;
}
main section #leftaside
{
    grid-area: leftaside;
}
main section article
{
    background-color: white;
}
main section #rightaside
{
    grid-area: rightaside;
}
main section aside
main footer
{
    grid-area: footer;
    display: grid;
    grid-template-rows: 10% 80% 10%;
    grid-template-columns: 100%;
}
main footer menu
{
    display: grid;
    grid-template-rows: 33.3% 33.3% 33.3%;
    grid-template-columns: auto;
}
main footer menu #brush
{
    width: 200px;
    height: 200px;
    grid-area: brush;
    background-color: white;
    background-image: url(img/brush.avif);
    background-repeat: no-repeat;
    background-position: center;
    background-size: cover;
}