.logo-img {
    content: '';
    display: block;
    width: 250px;
    height: 55px;
    top: 50%;
    left: 50%;
    background-image: url(/static/sprite-manual.png);
    background-size: 512px 256px;
    background-repeat: no-repeat;
}

.navbar-brand {
    padding-top: 15px;
    font-size: 2em;
}