in content/assets/javascript/init.js [250:259]
function onPopupClick(card, popup) {
popup.addEventListener('click', function toggleVisibility(e) {
var size = getDifference(popup, card);
card.style['opacity'] = 1;
card.style['borderRadius'] = '6px';
hidePopup(e);
transformCard(card, size);
}, false);
}