.backdrop{
  position: absolute;
  width: 100%;
  height: 100%;
  top:0;
  left:0;
  display:flex;
  align-items: center;
  cursor: pointer;
}

#controlTimeline{
  display:flex;
  align-items: center;
  width: 90%;
  height: 90px;
  margin: 25% auto 0;
  cursor: pointer;
}

.sliderBar{
  position:relative;
  background-color: #fff;
  width: 100%; height: 5px; 
  border-radius: 5px;
}

#sliderIndicater{
  position: absolute;
  background-color: #f80;
  top: 0px;
  left: 0;
  width: 0%;
  height: 5px;
  border-radius: 5px;
}

#sliderKnob{
  position: absolute;
  width: 40px;
  height: 40px;
  border-radius: 40px;
  box-shadow: 0px 1px 3px rgba(0,0,0,0.3);
  background-color: rgba(255,255,255,1.0);
  top: 0;
  right: 0;
  margin-top: calc(-20px + 2.5px);
  margin-right: -20px;
  transform: scale(1.00);
  transition: all 0.1s ease;
}

#sliderKnob:hover {
  transform: scale(1.05);
}
#sliderKnob:active {
  background-color: #f80;
  transform: scale(1.5);
}