#installModal {
 position: fixed;
 top:0;left:0;right:0;bottom:0;
 background: rgba(0,0,0,0.55);
 display:none;
 align-items:center;
 justify-content:center;
 z-index:99999;
}
#installModal .box {
 background:#fff;
 width:340px;
 padding:20px;
 border-radius:12px;
 text-align:center;
}
#installModal button {
 margin-top:15px;
 padding:10px;
 width:100%;
 background:#1a8f3f;
 color:white;
 border:none;
 border-radius:8px;
}