.caption div.media-element {
    /*border: 1px solid #ddd;*/
    padding: 5px;
    max-width: 100%;
    height: auto!important;
}
.caption div p {
    padding: 0px 3px;
    margin: 0px;
}
.page-intro .caption p {
    display:none;
}
.node-type-media-gallery .caption.image-style-media-gallery-thumbnail p {
    display:none;
}

span.caption {
    max-width: 100%!important;
    height: auto!important;
}

@media (max-width: 400px) {
    span.caption {
        margin: auto!important;
        float: none!important;
    }
}