.add_to_favorites {
    float: right;
}
.add_to_favorites > div#add_to_favorites_tooltip {
    background-color: #ffc;
    border: .1em solid #ccc;
    color: #333;
    display: none;
    overflow: visible;
    padding: .5em 1em;
    position: absolute;
    left: 0px;
    top: 3em;
    width: 15em;
    z-index: 99;
}
    .add_to_favorites > div#add_to_favorites_tooltip > .tooltip_pointer_up {
        position: absolute;
        left: 12em;
        top: -1em;
    }