jitsi_corner8/css/components/_input-slider.scss

/**
 * Disable the default webkit styles for range inputs (sliders).
 */
input[type=range]{
  -webkit-appearance: none;
  background: none;
}

/**
 * Disable the default focus styles for webkit range inputs (sliders).
 */
input[type=range]:focus {
  outline: none;
}

/**
 * Include the mixin for a range input style.
 */
@include slider {
  background: $sliderTrackBackground;
  border: none;
  border-radius: 3px;
  cursor: pointer;
  height: 6px;
  width: 100%;
}

/**
 * Include the mixin for a range input thumb style.
 */
@include slider-thumb {
  -webkit-appearance: none;
  background: white;
  border: 1px solid $sliderThumbBackground;
  border-radius: 50%;
  box-shadow: 0px 0px 1px $sliderThumbBackground;
  cursor: pointer;
  height: 14px;
  margin-top: -4px;
  width: 14px;
}