textual/docs/examples/widgets/placeholder.css

Placeholder {
    height: 100%;
}

#top {
    height: 50%;
    width: 100%;
    layout: grid;
    grid-size: 2 2;
}

#left {
    row-span: 2;
}

#bot {
    height: 50%;
    width: 100%;
    layout: grid;
    grid-size: 8 8;
}

#c1 {
    row-span: 4;
    column-span: 8;
}

#col1, #col2, #col3 {
    width: 1fr;
}

#p1 {
    row-span: 4;
    column-span: 4;
}

#p2 {
    row-span: 2;
    column-span: 4;
}

#p3 {
    row-span: 2;
    column-span: 2;
}

#p4 {
    row-span: 1;
    column-span: 2;
}