#content.galerie-admin a.category {
    opacity: 0.75;
    transition: opacity 0.4s ease;
    background: #555;
    color:#fff;
    border-radius: 3px;
    padding: 4px;
    margin: 5px;
    font-size: 12px;
}

#content.galerie-admin a.category:hover {
    opacity: 1;
}

#content.galerie-admin a.category > i {
    margin-right: 4px;
}