#overlay{position:fixed;width:100%;height:100%;top:0;left:0;right:0;bottom:0;background-color:rgba(0,0,0,.8);z-index:2;cursor:pointer;vertical-align:middle}.txtblock{color:#fff;z-index:3;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.txtblock p{font-weight:700;color:#fff;font-size:20px;line-height:1.5}