@keyframes flipOutX {
    0% {
        transform: perspective(400px) rotateX(0deg);
        opacity: 1;
    }
	100% {
        transform: perspective(400px) rotateX(90deg);
        opacity: 0;
    }
}

.flipOutX {
	animation-name: flipOutX;
	backface-visibility: visible !important;
}