if(!Element.prototype.matches){Element.prototype.matches=Element.prototype.msMatchesSelector||Element.prototype.webkitMatchesSelector;}
if(!Element.prototype.closest){Element.prototype.closest=function(selector){var element=this;while(element){if(element.matches(selector))return element;element=element.parentElement;}
return null;};}
document.addEventListener('click',function(event){var button=event.target.closest('.flip-card');if(button){var scene=button.closest('.scene');var boxFlip=scene.querySelector('.box-flip');boxFlip.classList.toggle('is-flipped');}});