.overlay{
position:fixed;
top:0;left:0;
width:100%;height:100%;
background:rgba(0,0,0,0.6);
display:flex;
align-items:center;
justify-content:center;
z-index:99999;
}
.box{
background:#fff;
max-width:600px;
width:90%;
border-radius:12px;
overflow:hidden;
position:relative;
}
.box img{width:100%;display:block;}
.close{
position:absolute;
top:10px;
right:10px;
background:#000;
color:#fff;
border-radius:50%;
padding:3px 8px;
cursor:pointer;
}