.btn-favorite .btn-favorite-done {
    display: none;
}

.btn-favorite.already_favorite .btn-favorite-done {
    display: block;
}
.btn-favorite.already_favorite .btn-favorite-todo {
    display: none;
}

.modal_text_container .btn-favorite, .contentblock_text .btn-favorite {
    float: right;
    margin: 0 0 10px 10px;
    font-size: 12px;
    position: relative;
    z-index: 9999;
}
@media (max-width: 768px) {
    .contentblock_text .btn-favorite {
        margin-top: 15px;
    }
}