.flip-clock {
	text-align: center;
	-webkit-perspective: 400px;
	perspective: 400px;
	margin: 20px auto;
	font-size: 16px;
}

.flip-clock *,
.flip-clock *:before,
.flip-clock *:after {
	-webkit-box-sizing: border-box;
	box-sizing: border-box;
}

.flip-clock__piece {
	display: inline-block;
	margin: 0 0.25em;
}

.flip-clock__slot {
	font-size: 0.9375em; /* 15px */
}

.card {
	display: block;
	position: relative;
	padding-bottom: 0.72em;
	font-size: 2.8125em; /* 45px */
	line-height: 0.95;
}

.card__top,
.card__bottom,
.card__back:before,
.card__back:after {
	display: block;
	height: 0.72em;
	color: #ccc;
	background: #222;
	padding: 0.32em 0.25em 0.25em;
	border-radius: 0.15em 0.15em 0 0;
	backface-visiblity: hidden;
	-webkit-transform-style: preserve-3d;
	transform-style: preserve-3d;
	width: 1.8em;
	-webkit-transform: translateZ(0);
	transform: translateZ(0);
}

.card__bottom {
	color: #FFF;
	position: absolute;
	top: 50%;
	left: 0;
	border-top: solid 1px #000;
	background: #393939;
	border-radius: 0 0 0.15em 0.15em;
	pointer-events: none;
	overflow: hidden;
}

.card__bottom:after {
	display: block;
	margin-top: -0.72em;
}

.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 {
	-webkit-animation: flipTop 0.3s cubic-bezier(0.37, 0.01, 0.94, 0.35);
	animation: flipTop 0.3s cubic-bezier(0.37, 0.01, 0.94, 0.35);
	-webkit-animation-fill-mode: both;
	animation-fill-mode: both;
	-webkit-transform-origin: center bottom;
	-ms-transform-origin: center bottom;
	transform-origin: center bottom;
}

.flip .card__back .card__bottom {
	-webkit-transform-origin: center top;
	-ms-transform-origin: center top;
	transform-origin: center top;
	-webkit-animation-fill-mode: both;
	animation-fill-mode: both;
	-webkit-animation: flipBottom 0.6s cubic-bezier(0.15, 0.45, 0.28, 1);
	animation: flipBottom 0.6s cubic-bezier(0.15, 0.45, 0.28, 1);
}

@-webkit-keyframes flipTop {
	0% {
		-webkit-transform: rotateX(0deg);
		transform: rotateX(0deg);
		z-index: 2;
	}
	0%,
	99% {
		opacity: 0.99;
	}
	100% {
		-webkit-transform: rotateX(-90deg);
		transform: rotateX(-90deg);
		opacity: 0;
	}
}

@keyframes flipTop {
	0% {
		-webkit-transform: rotateX(0deg);
		transform: rotateX(0deg);
		z-index: 2;
	}
	0%,
	99% {
		opacity: 0.99;
	}
	100% {
		-webkit-transform: rotateX(-90deg);
		transform: rotateX(-90deg);
		opacity: 0;
	}
}

@-webkit-keyframes flipBottom {
	0%,
	50% {
		z-index: -1;
		-webkit-transform: rotateX(90deg);
		transform: rotateX(90deg);
		opacity: 0;
	}
	51% {
		opacity: 0.99;
	}
	100% {
		opacity: 0.99;
		-webkit-transform: rotateX(0deg);
		transform: rotateX(0deg);
		z-index: 5;
	}
}

@keyframes flipBottom {
	0%,
	50% {
		z-index: -1;
		-webkit-transform: rotateX(90deg);
		transform: rotateX(90deg);
		opacity: 0;
	}
	51% {
		opacity: 0.99;
	}
	100% {
		opacity: 0.99;
		-webkit-transform: rotateX(0deg);
		transform: rotateX(0deg);
		z-index: 5;
	}
}