.slider {
  -webkit-appearance: none;
  width: 170px;
  height: 10px;
  background: #d3d3d3;
  outline: none;
  opacity: 0.7;
  -webkit-transition: .2s;
  transition: opacity .2s;
}

.slider:hover {
  opacity: 1;
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
/*  appearance: none;*/
  width: 25px;
  height: 10px;
  background: #f66;
  cursor: pointer;
}

.slider::-moz-range-thumb {
  width: 25px;
  height: 10px;
  background: #f66;
  cursor: pointer;
}