body {
    background-color: #181818;
}

.gallery {
    position: fixed;
    top: 50%;
    left: 50%;
    -webkit-transform: translate(-50%, -50%);
    transform: translate(-50%, -50%);
}

.footer {
    position: fixed;
    left: 0;
    bottom: 0;
    width: 100%;
    font-size: 18px;
    background-color: #202020;
    color: orange;
    text-align: center;
}

.footer a {
    text-decoration: none;
    color: inherit;
}