#popup-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.4);backdrop-filter:blur(8px);z-index:999;display:none;opacity:0;transition:opacity .5s ease}#popup{position:fixed;top:50%;left:50%;width:300px;background:#fff;border:1px solid rgba(255,255,255,.2);border-radius:24px;box-shadow:0 2px 10px rgba(0,0,0,.2);display:none;z-index:1000;padding:20px;box-sizing:border-box;opacity:0;transform:translate(-50%,-50%) scale(.9);transition:opacity .5s ease,transform .5s ease}#popup.show,#popup-overlay.show{display:block;opacity:1}#close-popup{position:absolute;top:10px;right:10px;background:linear-gradient(135deg,#ff6b6b,#ff4757);color:white;border:none;border-radius:50%;width:35px;height:35px;display:flex;align-items:center;justify-content:center;font-size:24px;font-weight:700;text-shadow:0 1px 3px rgba(0,0,0,.3);cursor:pointer;transition:background .3s ease,transform .3s ease}#popup img{width:100%;height:auto;border-radius:24px}#register-button{display:block;width:100%;padding:10px;margin-top:10px;background-color:#0056b3;color:white;border:none;border-radius:6px;text-align:center;cursor:pointer;text-decoration:none}#register-button:hover{background-color:#b22222;color:#f9f7f7}@media (max-width:600px){#popup{width:80%;padding:16px}#close-popup{width:32px;height:32px;font-size:26px}#register-button{padding:8px}}