.box{height:0;opacity:0;-webkit-transition:all .5s ease-out;-moz-transition:all .5s ease-out;-o-transition:all .5s ease-out;-ms-transition:all .5s ease-out;z-index:-99;display:none!important}.box.active{height:100%;opacity:1;-webkit-transition:all .5s ease-out;-moz-transition:all .5s ease-out;-o-transition:all .5s ease-out;-ms-transition:all .5s ease-out;z-index:99;display:block!important}