.overlay{
    opacity:0.8;
    background-color:#ccc;
    position:fixed;
    width:100%;
    height:100%;
    top:0px;
    left:0px;
    z-index:1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.overlaybox {
    opacity:1.0;
    background-color: white;    
    width:200px;
    height:200px;
}