@mixin list($device: "") {
    %#{$device}not-list {
        list-style: none;
        margin: 0;
        padding: 0;
    }

    @if $classes {
        .#{$device}not-list {
            @extend %#{$device}not-list;
        }
    }
}

@include list;

@each $device, $pixels in $devices {
    @include media($device) {
        @include list($device + "-");
    }
}

@include mobile {
    @include list("mobile-");
}