Vertical scrollable element with custom scroll css style

vertical-scrollable-element.css

/* 
vertical scrollable menu
*/
.tokenz-vertical-scrollable-menu ul::-webkit-scrollbar-thumb {
    background-color: darkgrey !important;
    outline: 0px solid slategrey !important;
}
.tokenz-vertical-scrollable-menu ul::-webkit-scrollbar-track {
    box-shadow: inset 0 0 6px rgb(0 0 0 / 30%) !important;
}
.tokenz-vertical-scrollable-menu ul::-webkit-scrollbar {
    width: 1px !important;
    height: 3px !important;
}
.tokenz-vertical-scrollable-menu ul {
    display: block !important;
    overflow: auto !important;
    white-space: nowrap !important;
}
.tokenz-vertical-scrollable-menu ul li {
    display: inline-block !important;
}