/* debug: attach a “?” class to debug with a blinking box */ .? {

animation: \?wobble 0.5s ease-in-out alternate infinite;

} @keyframes ?wobble {

0% { box-shadow: inset 1px 1px gold, inset -1px -1px gold; }
100% { box-shadow: inset 5px 5px red, inset -5px -5px red; }

}