ZeroNet/plugins/Sidebar/media/Scrollbable.css

.scrollable {
    overflow: hidden;
}

.scrollable.showScroll::after {
    position: absolute;
    content: '';
    top: 5%;
    right: 7px;
    height: 90%;
    width: 3px;
    background: rgba(224, 224, 255, .3);
}

.scrollable .content-wrapper {
    width: 100%;
    height: 100%;
    padding-right: 50%;
    overflow-y: scroll;
}
.scroller {
    margin-top: 5px;
    z-index: 5;
    cursor: pointer;
    position: absolute;
    width: 7px;
    border-radius: 5px;
    background: #3A3A3A;
    top: 0px;
    left: 395px;
    -webkit-transition: top .08s;
    -moz-transition: top .08s;
    -ms-transition: top .08s;
    -o-transition: top .08s;
    transition: top .08s;
}
.scroller {
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}