.flip-clock{text-align:center;perspective:400px;margin:20px auto;*,:after,:before{box-sizing:border-box}}.flip-clock__piece{display:inline-block;margin:0 2px}.flip-clock__slot{font-size:.8rem;line-height:1.5;display:block}.card{display:block;position:relative;padding-bottom:.72em;font-size:2.5vw;line-height:.95}@media (max-width:600px){.card{font-size:10vw}}.card__back:after,.card__back:before,.card__bottom,.card__top{display:block;height:.72em;color:#ccc;background:#222;padding:.25em;border-radius:.15em .15em 0 0;backface-visibility:hidden;transform-style:preserve-3d;width:1.8em;transform:translateZ(0)}.card__bottom{color:#FFF;position:absolute;top:50%;left:0;border-top:1px solid #000;background:#393939;border-radius:0 0 .15em .15em;pointer-events:none;overflow:hidden}.card__bottom:after{display:block;margin-top:-.72em}.card__back:before,.card__bottom:after{content:attr(data-value)}.card__back{position:absolute;top:0;height:100%;left:0;pointer-events:none}.card__back:before{position:relative;z-index:-1;overflow:hidden}.flip .card__back:before{animation:flipTop .3s cubic-bezier(.37,.01,.94,.35);animation-fill-mode:both;transform-origin:center bottom}.flip .card__back .card__bottom{transform-origin:center top;animation-fill-mode:both;animation:flipBottom .6s cubic-bezier(.15,.45,.28,1)}@keyframes flipTop{0%{transform:rotateX(0deg);z-index:2}0%,99%{opacity:.99}to{transform:rotateX(-90deg);opacity:0}}@keyframes flipBottom{0%,50%{z-index:-1;transform:rotateX(90deg);opacity:0}51%{opacity:.99}to{opacity:.99;transform:rotateX(0deg);z-index:5}}