.box{
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(0,0,0,.5);
    z-index: 9999999999999999;
    display: flex;
    justify-content: center;
    align-items: center;
}
.sbox{
    background: rgba(10, 16, 44, 0.9);
    width: 90%;
    height: 80%;
    text-align: center;
}
.sbox iframe {
    width: 100%;
    height: 100%;
    border: 0;
    margin: 0;
    padding: 0;
    background: #fff;
}