.sunpdf-btn {padding:10px 20px;background:#0044cc;color:#fff;border:none;cursor:pointer;}
.sunpdf-modal {display:none;position:fixed;z-index:9999;left:0;top:0;width:100%;height:100%;background:rgba(0,0,0,0.7);}
.sunpdf-content {position:relative;margin:5% auto;width:80%;height:80%;background:#fff;}
.sunpdf-content iframe {width:100%;height:100%;}
.sunpdf-close {position:absolute;top:10px;right:20px;font-size:30px;color:#333;cursor:pointer;}