.tutorial {
    position:absolute;
    top:0;
    left: 0;
    margin: auto;
    width:100%;
    height:100%;
    z-index:1000;
    background-color:#708DA7;
    -ms-opacity: 1;
    opacity: 1;
    display: none;
}

.tutorial img {
    position: absolute;
    top: 0;
    left: 50%;
    margin-left: -512px;
    margin-top: 0;
}