substance/packages/scrollbar/_scrollbar.css

Substance is a JavaScript library for web-based content editing. It provides building blocks for realizing custom text editors and web-based publishing systems.

.sc-scrollbar {
  position: absolute;
  left: 0px;
  width: 20px;
  top: 0px;
  bottom: 0px;
  background: #FAFAFA;
  box-shadow: inset -4px 0 4px 0 rgba(25,25,25,0.04);
}

.sc-scrollbar .se-thumb {
  position: absolute;
  top: 40px;
  left: 0px;
  right: 0px;
  height: 0px;
  background-color: rgba(0,0,0, 0.2);
}

.sc-scrollbar.sm-hide-thumb .se-thumb {
  visibility: hidden;
}

.sc-scrollbar .se-highlight {
  position: absolute;
  width: 100%;
  background-color: #A5AFBD;
}