html, body {
    margin: 0;
    height: 100%;
}

body {
background-color: black;
background-image: url("http://bglegal.sk/media/bg-legal-logo.png");
background-position: center center; /* Center the image */
background-repeat: no-repeat;
margin:0;
}

@media only screen and (max-width: 767px) {
body {
background-size: 60px auto;
}
}