@include box-shadow($custom-range-track-box-shadow);\n  }\n\n  &::-ms-fill-lower {\n    background-color: $custom-range-track-bg;\n    @include border-radius($custom-range-track-border-radius);\n  }\n\n  &::-ms-fill-upper {\n    margin-right: 15px; // arbitrary?\n    background-color: $custom-range-track-bg;\n    @include border-radius($custom-range-track-border-radius);\n  }\n\n  &:disabled {\n    &::-webkit-slider-thumb {\n      background-color: $custom-range-thumb-disabled-bg;\n    }\n\n    &::-web...