.watermark {
    display: block;
    position: absolute;
    opacity: 0.8;
    -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=80)";
    z-index: 10;
    width: 200px;
    margin: 0 auto;
    left: 0;
    right: 0;
    top: 25%;
}