.widget {
    background: olivedrab;
    width: 10;
    margin: 1;
}

#dock-1 {
    dock: left;
    background: dodgerblue;
    width: 5;
}

#dock-2 {
    dock: left;
    background: mediumvioletred;
    margin: 3;
    width: 20;
}

#horizontal {
    width: auto;
    height: 4;
    background: darkslateblue;
}