#reading-position-indicator {
  display: inline-block;
  position: fixed;
  left: 0;
  top: 0;
  width: 100%;
  height: 5px;
  appearance: none;
  border: none;
  background-color: transparent;
  color: red;
  z-index: 99999;
}
#reading-position-indicator:after {
  background-image: none;
}
#reading-position-indicator .progress-container {
  width: 100%;
  background-color: transparent;
  position: fixed;
  top: 0;
  left: 0;
  height: 5px;
  display: block;
}
#reading-position-indicator .progress-container .progress-bar {
  background-color: red;
  width: 0%;
  display: block;
  height: inherit;
}

.admin-bar #reading-position-indicator {
  top: 32px;
}