body:not(#backend){
 
    @mainWidth: 1160px;
    @tabletWidth: 768px;
    @wideMobileWidth: 480px;
    @mobileLayout: 320px;
 
    /* Main layout */
    @media only screen and (min-width: @mainWidth) {
        @import @ROOT_DIR+"src/IndexBundle/public/css/responsive/main-layout.less";
    }    
 
    // Tablet Layout (nexus 7 horizontal)
    @maxTabletWidth: @mainWidth - 1;
    @media only screen and (min-width: @tabletWidth) and (max-width: @maxTabletWidth) {
        @import @ROOT_DIR+"src/IndexBundle/public/css/responsive/tablet-layout.less";
    }
 
    // Wide Mobile Layout (nexus 7 vertical, huawey horizontal)
    @maxWideMobileWidth: @tabletWidth - 1;
    @media only screen and (min-width: @wideMobileWidth) and (max-width: @maxWideMobileWidth) {
        @import @ROOT_DIR+"src/IndexBundle/public/css/responsive/wide-mobile-layout.less";
    }
 
    // Mobile Layout (huawey vertical)
    @maxMobileWidth: @wideMobileWidth - 1;
    @media only screen and (max-width: @maxMobileWidth) {
        @import @ROOT_DIR+"src/IndexBundle/public/css/responsive/mobile-layout.less";
    }
 
}