.vsa-scroll-line {
  position: absolute;
  right: 0;
  background-color: hotpink;
  width: 6px;
  border: 3px solid #4F63B8;
  border-right: none;
  box-sizing: border-box;
  pointer-events: none;
  opacity: 0;
}
.vsa-scroll-line > span {
  position: absolute;
  font-size: 12px;
  top: 0;
  right: 100%;
  margin-right: 6px;
  white-space: nowrap;
  background-color: #000;
  border: 3px solid hotpink;
  color: #fff;
  text-transform: uppercase;
  font-weight: 700;
  padding: 2px 4px;
  border-radius: 2px;
}

.vsa-scroll-screen-line {
  position: fixed;
  left: 0;
  width: 100%;
  z-index: 1000;
  pointer-events: none;
  border-bottom: 1px dashed red;
  z-index: 999999;
  box-sizing: border-box;
  opacity: 0;
}
.vsa-scroll-screen-line > span {
  position: absolute;

  font-size: 10px;
  line-height: 1;
  padding: 4px 2px;
  background-color: red;
  color: #fff;
  font-weight: 700;
  text-transform: uppercase;
  opacity: 0.75;
}
.vsa-scroll-screen-line > span:first-child {
  left: 0;
  bottom: 0;
}
.vsa-scroll-screen-line > span:last-child {
  right: 0;
  top: 0;
}

body.vsa-show-helpers .vsa-scroll-line, body.vsa-show-helpers .vsa-scroll-screen-line {
  opacity: 0.9;
}