.custom-popup{display:none;position:fixed;z-index:9999;left:0;top:0;width:100%;height:100%;background-color:rgba(0,0,0,0.6)}.popup-content{background:#fff;width:90%;max-width:600px;margin:10% auto;padding:20px;position:relative;border-radius:8px}.popup-close{position:absolute;right:15px;top:10px;font-size:28px;cursor:pointer}