.mediaMax(@width, @rules) {
    @media screen and (max-width: @width){
        @rules();
    }
}

.mediaMin(@width, @rules) {
    @media screen and (min-width: @width){
        @rules();
    }
}

.mediaMM(@minWidth, @maxWidth, @rules) {
    @media screen and (min-width: @minWidth) and (max-width: @maxWidth){
        @rules();
    }
}