$label-color: #333 !default;
$label-background: white !default;
$label-shadow: 0 10px 20px -5px rgba(45, 45, 45, 0.25);

$slider-track-background: #999 !default;
$slider-track-height: 3px !default;

$thumb-background: #eee !default;
$thumb-size: 20px;

.slider {
  position: relative;
  margin-top: 50px;
  margin-bottom: 30px;
  width: 100%;
  display: flex;
  flex-direction: column;

  &__label {
    position: absolute;
    top: -17px;
    background: $label-background;
    color: $label-color;
    font-weight: bold;
    padding: 2px 5px;
    font-size: 12px;
    text-align: center;
    transform: translateX(-50%);
    margin-left: 1em;
    box-shadow: $label-shadow;
    min-width: 30px;
    white-space: nowrap;

    &:after {
      content: "";
      position: absolute;
      bottom: -10px;
      height: 0;
      width: 0;
      left: 0;
      right: 0;
      margin: auto;
      border: 5px solid transparent;
      border-top-color: $label-background;
    }
  }

  &__wrapper {
    position: relative;
    display: flex;
    align-items: center;
  }

  &__track {
    width: 100%;
    position: absolute;
    z-index: 0;
    height: 3px;
    background: $slider-track-background;

    &--rectangular {
      height: $slider-track-height;
    }
  }

  &__track-top,
  &__track-bottom {
    content: "";
    width: 100%;
    position: absolute;
    width: 0;
    height: 0;
    border-style: solid;
  }

  &__track-top {
    top: -6px;
    border-width: 0 0 6px 500px;
    border-color: transparent transparent $slider-track-background transparent;
  }

  &__track-bottom {
    top: 3px;
    border-width: 0 500px 6px 0;
    border-color: transparent $slider-track-background transparent transparent;
  }

  &__input {
    -webkit-appearance: none;
    margin: 10px 0;
    width: 100%;
    background: none;
    padding: 0;
    z-index: 1;
    position: relative;

    &:focus {
      outline: none;
    }
    &::-webkit-slider-runnable-track {
      width: 100%;
      height: 10px;
      cursor: pointer;
      animate: 0.2s;
      background: transparent;
      border-radius: 0;
      border: none;
    }

    // Thumb
    &::-webkit-slider-thumb {
      height: $thumb-size;
      width: $thumb-size;
      border-radius: 50%;
      cursor: pointer;
      -webkit-appearance: none;
      margin-top: -5px;
      background: $thumb-background;
    }
    &::-moz-range-thumb {
      height: $thumb-size;
      width: $thumb-size;
      border-radius: 50%;
      background: $thumb-background;
      cursor: pointer;
      border: none;
    }
    &::-ms-thumb {
      height: $thumb-size;
      width: $thumb-size;
      border-radius: 50%;
      background: $thumb-background;
      cursor: pointer;
    }

    // Track

    &:focus::-webkit-slider-runnable-track {
      background: transparent;
    }

    &::-moz-range-track {
      width: 100%;
      height: 10px;
      cursor: pointer;
      animate: 0.2s;
      background: transparent;
      border-radius: 0;
    }

    &::-ms-track {
      width: 100%;
      height: 10px;
      cursor: pointer;
      animate: 0.2s;
      background: transparent;
      border-color: transparent;
      border-width: 10px 0;
      border-radius: 0;
      color: transparent;
    }
    &::-ms-fill-lower {
      background: transparent;
      border: none;
      border-radius: 0;
    }
    &::-ms-fill-upper {
      background: transparent;
      border: none;
      border-radius: 0;
    }
  }
}