#welcome-popup{position:fixed;display:flex;top:50%;left:50%;transform:translate(-50%,-50%);background:#fff;padding:20px;box-shadow:0 2px 10px rgba(0,0,0,.2);z-index:100002}#welcome-popup p{margin:0;margin-bottom:10px}#welcome-popup button{margin-right:10px}.popup-active::before{content:"";position:fixed;top:0;left:0;width:100%;height:100%;background-color:rgba(0,0,0,.8);z-index:100001}