#instance_watermark{
    display: none;
    position: fixed;
    top: 0px;
    right: 0px;
    left: 0px;
    background-color: black;
    text-align: right;
    opacity: 0.5;
    padding: 10px 50px;
    font-size: 20px;
    z-index: 9999999;
    height: 50px;
    color: red;
}

body.instance_watermark {
    margin-top: 50px;
}

body.instance_watermark .app-wrapper::before{
    top:50px;
    bottom:-50px;
}
body.instance_watermark #instance_watermark {
    display: block;
}