.center-track {
  position: relative;
  background: transparent;
}

.center-track-container {
  position: absolute;
}

.center-track {
  position: relative;
  background: transparent;
}

.center-track-container {
  position: absolute;
  z-index: 1;
}

Make sure the center track is on top
Make sure the center track is on top
