html, body {
    height: 100%;
}

html {
    background-image: url("images/BG.png");
    background-position: 50% 50%;
    background-size: cover;
    background-color: black;
    display: table;
    margin: auto;
}

body {
    text-align:center;
    display: table-cell;
    vertical-align: middle;
}

img {
    max-width: 30%;
    height: auto;
    width: auto\9; /* ie8 */
}

a {
    font-family: sans-serif
}