textual-paint/paint.css

Screen {
    overflow: auto;
}

#paint {
    layout: grid;
    grid-size: 2;
    grid-gutter: 1 2;
    grid-columns: 20 1fr;
    grid-rows: 1fr;
    margin: 0 0;
    min-height: 25;
    min-width: 26;
    height: 100%;
}

#tools_box {
    layout: grid;
    grid-size: 2;
    grid-gutter: 0 1;
    grid-columns: 6;
    grid-rows: 3;
    padding: 1 1;
    /* min-height: 25; */
    /* min-width: 26; */
    height: 100%;
}

#tools_box Button.selected {
    background: #aaa;
}

Button {
    width: 100%;
    height: 100%;
}