.flip-card{width:12.5rem;height:16.25rem;perspective:62.5rem}.flip-card-inner{position:relative;width:100%;height:100%;text-align:center;transition:transform .6s;transform-style:preserve-3d}.flip-card:hover .flip-card-inner{transform:rotateY(180deg)}.flip-card-back,.flip-card-front{position:absolute;width:100%;height:100%;backface-visibility:hidden}.flip-card-front{background-color:#bbb;color:#000}.flip-card-back{background-color:#2980b9;color:#fff;transform:rotateY(180deg)}.countdown{font-size:2rem;text-align:center;margin-top:1.25rem;animation:countdown-animation 1s infinite}@keyframes countdown-animation{0%{transform:scale(1)}50%{transform:scale(1.1)}to{transform:scale(1)}}