body,html{margin:0;padding:0;height:100%;overflow:hidden}iframe{border:0;width:100%;height:100%}#installButton{position:fixed;bottom:20px;right:20px;background:#f49519;color:#fff;border:none;border-radius:10px;padding:12px;font-size:16px;cursor:pointer;display:none;box-shadow:0 4px 10px rgba(0,0,0,.2);z-index:9999}