ui/file_manager/file_manager/audio_player/elements/volume_controller.css

/* Copyright 2014 The Chromium Authors. All rights reserved.
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file. */

:host {
  background: white;
  display: block;
  height: 100px;
  position: relative;
  width: 32px;
}

#background {
  height: 100%;  /* will be overridden by javascript */
  left: 0;
  position: absolute;
  top: 0;
  width: 100%;
}

input[type='range'] {
  -webkit-appearance: none !important;
  -webkit-transform: rotate(90deg);
  background: transparent;
  outline: none;
  position: absolute;
  z-index: 1;
}

input[type='range']::-webkit-slider-thumb {
  -webkit-appearance: none;
  -webkit-transform: rotate(-90deg);
  background-image: -webkit-image-set(
      url(../assets/100/player_timeline_handler.png) 1x,
      url(../assets/200/player_timeline_handler.png) 2x);
  background-position: 50% 50%;
  background-repeat: no-repeat no-repeat;
  height: 24px;
  position: relative;
  width: 24px;
}

#bar {
  background: #000;
  bottom: 14px;
  position: absolute;
  top: 14px;
}

#bar .filled {
  background: #aaa;
}