Slider.less

@text-color: #707171;

.WLC-range-base {
    width: 100%;
    height: 22px;
    margin: 0;
    padding: 0;
    position: absolute;
    background: transparent;

    outline: none; /* no focus outline */

    -webkit-appearance: none;
    -webkit-tap-highlight-color: rgba(255, 255, 255, 0);
}

.WLC-range-fill {
    position: relative;
    top: 9px;

    width: 10px;
    height: 3px;

    border-radius: 12px;
    background-color: @main-color;

    &.disabled {
        background: rgba(236,236,236,0.5);
    }
}

.WLC-range-thumb {
    width: 22px;
    height: 22px;

    border-radius: 12px;
    border: 0px;
    background: @main-color;

    -webkit-appearance: none;
}

.WLC-range-track {
    height: 1px;
    background-color: @text-color;
    width: 100%;
    position: relative;
    top: 11px;
    z-index: 0;
}

.WLC-Slider {
    position: relative;

    display: inline-block;

    width: 100px;
    height: 30px;
    input[type='range'] {
        .WLC-range-base;
    }
    input[type='range']::-moz-range-track {
        border: none;
        background: transparent;
    }
    input[type='range']::-ms-track {
        color: transparent; /* don't drawn vertical reference line */
        border: inherit;
        background: transparent;
    }
    input[type='range']::-ms-fill-lower,
    input[type='range']::-ms-fill-upper {
        background: transparent;
    }
    input[type='range']::-ms-tooltip {
        display: none;
    }
    input[type='range']::-webkit-slider-thumb {
        .WLC-range-thumb;
    }

    input[type="range"]:disabled::-webkit-slider-thumb {
        background: rgba(236,236,236,1);
        border: none;
    }

    input[type="range"]:disabled::-moz-range-thumb {
        background: rgba(236,236,236,1);
        border: none;
    }

    input[type="range"]:disabled::-ms-thumb  {
        background: rgba(236,236,236,1);
        border: none;
    }

    input[type='range']::-moz-range-thumb {
        .WLC-range-thumb;
    }
    input[type='range']::-ms-thumb {
        .WLC-range-thumb;
    }

    .WLC-slider-fill {
        .WLC-range-fill;
    }

    .WLC-track {
        .WLC-range-track;
    }
    .WLC-sub-label {
        font-size: 11px;

        position: relative;
        top: 12px;

        color: @text-color;
    }
}