$slider-background : #8E8E8E, #B7B7B7;
$slider-background-disabled : lighten(#8E8E8E, 40%), lighten(#B7B7B7, 20%);
$slider-border: #7B7B7B;

$slider-knob-background : #F7F7F7, #E8E8E8;
$slider-knob-background-disabled : #F7F7F7, lighten(#E8E8E8, 5%);
$slider-knob-background-active : darken(#F7F7F7, 25%), darken(#E8E8E8, 25%);

.qx-slider {
  overflow-y: visible;
  overflow-x: visible;
  cursor: pointer;
  padding: 0 px-to-rem(18);
}

.qx-slider:before {
  position: relative;
  content: '';
  width: 100%;
  line-height: 0.3;
  border: px-to-rem(1) solid $slider-border;
  display: inline-block;
  @include border-radius(px-to-rem(3));
  @include background($slider-background);
  top: px-to-rem(26);
  height: px-to-rem(7);
  @include box-sizing(border-box);
}

.qx-slider-knob {
  cursor: pointer;
  display: inline-block;
  position: relative;

  @include user-select(none);

  width: px-to-rem(36);
  height: px-to-rem(36);

  font-weight: bold;
  text-align: center;

  border: px-to-rem(1) solid $slider-border;
  @include background($slider-knob-background);
  @include border-radius(px-to-rem(60));

  line-height: 0;
  padding: 0;
}

.qx-slider-knob:active {
  @include background($slider-knob-background-active);
  color: $background-color;
}

.qx-slider[disabled]:before {
  border: px-to-rem(1) solid lighten($slider-border, 40%);
  @include background($slider-background-disabled);
}

.qx-slider-knob[disabled] {
  border: px-to-rem(1) solid lighten($slider-border, 30%);
  @include background($slider-knob-background-disabled);
  color: lighten($slider-border, 25%);
}

.qx-slider-knob:focus {
  outline: none;
}