#custom-popup{display:none;position:fixed;top:0;left:0;width:100vw;height:100vh;background:rgba(0,0,0,.4);z-index:9999;align-items:center;justify-content:center}#custom-popup.active{display:flex}.popup-content{background:#fff;padding:24px;min-width:300px;text-align:center;position:relative;box-shadow:0 4px 24px rgba(0,0,0,.15)}#popup-close-btn{margin-top:16px;padding:10px;color:#fff;border:none;font-size:16px;line-height:1;min-width:100px;cursor:pointer;transition:background .3s ease,color .3s;border:1px solid #000;background:#000}#popup-close-btn:hover{background:#fff;color:#000}span#popup-message{font-size:14px}body.custom-popup-active{overflow:hidden}