html,
body {
    background: #000;
    color: #333;
    height: 100%;
    width: 100%;
    padding: 0;
    margin: 0;
    overflow: hidden;
}

#center {
    position: relative;
    display: block;
    top: 50%;
    margin-top: -1000px;
    height: 2000px;
    text-align: center;
    line-height: 2000px;
}

#wrap {
    line-height: 0;
}

#wrap img {
    vertical-align: middle;
}