.pnlBack-OpenIframe {
    position: fixed;
    top: 0px;
    left: 0px;
    width: 100vw;
    height: 100vh;
    z-index: 999;
    background: rgba(0, 0, 0, .8);
    display: flex;
    justify-content: center;
    align-items: center;
}

.pnlFront-OpenIframe {
    position: relative;
    width: 950px;
    max-width: calc(100% - 80px);
    height: calc(100% - 60px);
}

.ifr-OpenIframe {
    width: 100%;
    height: 100%;
    border: 0px;
    border-radius: 6px;
}

.btnClose-OpenIframe {
    position: fixed;
    top: 25px;
    right: 40px;
    font-size: 24px;
    background: transparent;
    border: 0px;
    color: #fff;
    outline: none;
    width: 25px;
    height: 24px;
}
    button:focus{outline: none !important;}
    .btnClose-OpenIframe > span:before, .btnClose-OpenIframe > span:after {
        content: "";
        position: absolute;
        width: 3px;
        height: 22px;
        border-radius: 15px;
        transform: rotate( 45deg );
        background: #D2D0D0;
        top: 0px;
    }
    .btnClose-OpenIframe > span:after {
        transform: rotate(-45deg);
    }