:root{
  --scrollBarProgress:#ff0;
  --scrollBarProgressBg:blue;
  --scrollBarProgressText:#000;
}

.progress-bar {
  width: 100%;
  height: 20px;
  background-color: var(--scrollBarProgressBg);
  border-radius: 5px;
  overflow: hidden;
  position: relative;
  margin-bottom: 10px;
  box-shadow: inset 6px 9px 10px #000;
}

.progress-bar-fill {
  height: 100%;
  background-color: var(--scrollBarProgress);
  width: 0%;
  text-align: center;
  color: var(--scrollBarProgressText);
  position: absolute;
  left: 0;
  top: 0;
  transition: width 1s;
  box-shadow: inset 0px 0 6px 0px #000;
}

.progress-bar-label {
  display: inline-block;
  position: relative;
  top: 50%;
  transform: translateY(-50%);
  padding-left: 10px;
  font-size: 14px;
  color: var(--scrollBarProgressText);
}