.manual-header:before {
    content: "";
    background-image: url("logo.png");
    width: 4em;
    height: 4em;
    float: left;
    background-position: 0;
    background-size: 100%;
    background-repeat: no-repeat;
    margin-right: 0.9em;
    position: relative;
    top: -0.6em;
}