.wdg-gravatar {
    position: relative;
    display: inline-block;
    background-color: rgba(0,0,0,.3);
    padding: 0;
}

.wdg-gravatar > img {
    position: absolute;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 100%;
    margin: 0;
    transition: opacity .7s;
    opacity: 1;
}

.wdg-gravatar.fade > img {
    transition: opacity .7s;
    opacity: 0;
}

.wdg-gravatar.hide {
    display: none;
}