sp-codes.de/bower_components/foundation-sites/scss/forms/_range.scss

// Foundation for Sites by ZURB
// foundation.zurb.com
// Licensed under MIT Open Source

////
/// @group slider
////

/// Default height of the slider.
/// @type Number
$slider-height: 0.5rem !default;

/// Default background color of the slider's track.
/// @type Color
$slider-background: $light-gray !default;

/// Default color of the active fill color of the slider.
/// @type Color
$slider-fill-background: $medium-gray !default;

/// Default height of the handle of the slider.
/// @type Number
$slider-handle-height: 1.4rem !default;

/// Default width of the handle of the slider.
/// @type Number
$slider-handle-width: 1.4rem !default;

/// Default color of the handle for the slider.
/// @type Color
$slider-handle-background: $primary-color !default;

/// Default fade amount of a disabled slider.
/// @type Number
$slider-opacity-disabled: 0.25 !default;

/// Default radius for slider.
/// @type Number
$slider-radius: $global-radius !default;

@mixin foundation-range-input {
  // scss-lint:disable QualifyingElement
  input[type="range"] {
    $margin: ($slider-handle-height - $slider-height) / 2;

    -webkit-appearance: none;
    -moz-appearance: none;
    display: block;
    width: 100%;
    height: auto;
    cursor: pointer;
    margin-top: $margin;
    margin-bottom: $margin;
    border: 0;
    line-height: 1;

    @if has-value($slider-radius) {
      border-radius: $slider-radius;
    }

    &:focus {
      outline: 0;
    }

    &[disabled] {
      opacity: $slider-opacity-disabled;
    }

    // Chrome/Safari
    &::-webkit-slider-runnable-track {
      height: $slider-height;
      background: $slider-background;
    }

    &::-webkit-slider-handle {
      -webkit-appearance: none;
      background: $slider-handle-background;
      width: $slider-handle-width;
      height: $slider-handle-height;
      margin-top: -$margin;

      @if has-value($slider-radius) {
        border-radius: $slider-radius;
      }
    }

    // Firefox
    &::-moz-range-track {
      -moz-appearance: none;
      height: $slider-height;
      background: $slider-background;
    }

    &::-moz-range-thumb {
      -moz-appearance: none;
      background: $slider-handle-background;
      width: $slider-handle-width;
      height: $slider-handle-height;
      margin-top: -$margin;

      @if has-value($slider-radius) {
        border-radius: $slider-radius;
      }
    }

    // Internet Explorer
    &::-ms-track {
      height: $slider-height;
      background: $slider-background;
      color: transparent;
      border: 0;
      overflow: visible;
      border-top: $margin solid $body-background;
      border-bottom: $margin solid $body-background;
    }

    &::-ms-thumb {
      background: $slider-handle-background;
      width: $slider-handle-width;
      height: $slider-handle-height;
      border: 0;

      @if has-value($slider-radius) {
        border-radius: $slider-radius;
      }
    }

    &::-ms-fill-lower {
      background: $slider-fill-background;
    }

    &::-ms-fill-upper {
      background: $slider-background;
    }

    @at-root {
      output {
        line-height: $slider-handle-height;
        vertical-align: middle;
        margin-left: 0.5em;
      }
    }
  }
}