html, body {
    padding: 0;
    margin: 0;
    background: #000;
}

.wrappper {
    width: 100%;
    height: 100%;
}

img.logo {
    width: 10%;
    height: auto;
    margin: 0 auto;
    display: block;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
}