.submenu {
    display: flex;
    flex-direction: row;
    justify-content: space-around;
}
#nl-ctl.submenu,#scrolling-hint.submenu{
    height:auto;
    margin:0pt;
    padding:0pt;
}
#page-payload {
    overflow: auto;
}
#page-payload > div {
    height:auto;
}
#categories {max-width:400px;}