.links-rss a:after{content:attr(data-popover);opacity:0;visibility:hidden;transition:opacity 1s;background-color:#000;color:#fff;font-size:15px;width:max-content;max-width:500px;padding:5px 10px;position:absolute;bottom:150%;left:0;border-radius:12px;box-shadow:0 0px 15px 0px #000;animation:shake 50s ease-in-out 5s infinite}.links-rss a:hover:after{opacity:1;visibility:visible;transition:opacity .2s}.links-rss p{margin-bottom:0}