@-webkit-keyframes flipInY {
  0% {
    -webkit-transform: perspective(400px) rotate3d(0, 1, 0, 90deg);
    transform: perspective(400px) rotate3d(0, 1, 0, 90deg);
    -webkit-animation-timing-function: ease-in;
    animation-timing-function: ease-in;
    opacity: 0;
  }

  40% {
    -webkit-transform: perspective(400px) rotate3d(0, 1, 0, -20deg);
    transform: perspective(400px) rotate3d(0, 1, 0, -20deg);
    -webkit-animation-timing-function: ease-in;
    animation-timing-function: ease-in;
  }

  60% {
    -webkit-transform: perspective(400px) rotate3d(0, 1, 0, 10deg);
    transform: perspective(400px) rotate3d(0, 1, 0, 10deg);
    opacity: 1;
  }

  80% {
    -webkit-transform: perspective(400px) rotate3d(0, 1, 0, -5deg);
    transform: perspective(400px) rotate3d(0, 1, 0, -5deg);
  }

  100% {
    -webkit-transform: perspective(400px);
    transform: perspective(400px);
  }
}

@keyframes flipInY {
  0% {
    -webkit-transform: perspective(400px) rotate3d(0, 1, 0, 90deg);
    transform: perspective(400px) rotate3d(0, 1, 0, 90deg);
    -webkit-animation-timing-function: ease-in;
    animation-timing-function: ease-in;
    opacity: 0;
  }

  40% {
    -webkit-transform: perspective(400px) rotate3d(0, 1, 0, -20deg);
    transform: perspective(400px) rotate3d(0, 1, 0, -20deg);
    -webkit-animation-timing-function: ease-in;
    animation-timing-function: ease-in;
  }

  60% {
    -webkit-transform: perspective(400px) rotate3d(0, 1, 0, 10deg);
    transform: perspective(400px) rotate3d(0, 1, 0, 10deg);
    opacity: 1;
  }

  80% {
    -webkit-transform: perspective(400px) rotate3d(0, 1, 0, -5deg);
    transform: perspective(400px) rotate3d(0, 1, 0, -5deg);
  }

  100% {
    -webkit-transform: perspective(400px);
    transform: perspective(400px);
  }
}

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