.popup-overlay{display:none;position:fixed;z-index:9999;inset:0;background:rgba(0,0,0,.7)}.popup-content{background:#fff;max-width:500px;margin:10% auto;padding:30px;position:relative;border-radius:8px}.close-popup{position:absolute;top:10px;right:15px;background:0 0;border:0;font-size:24px;cursor:pointer}