.cd-transition-layer {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 2;
  height: 100%;
  width: 100%;
  opacity: 0;
  visibility: hidden;
  overflow: hidden;
}
.cd-transition-layer .bg-layer {
  position: absolute;
  left: 50%;
  top: 50%;
  -webkit-transform: translateY(-50%) translateX(-2%);
  -moz-transform: translateY(-50%) translateX(-2%);
  -ms-transform: translateY(-50%) translateX(-2%);
  -o-transform: translateY(-50%) translateX(-2%);
  transform: translateY(-50%) translateX(-2%);
  /* its dimentions will be overwritten using jQuery to proportionally fit the viewport */
  height: 100%;
  /* our sprite is composed of 25 frames */
  width: 2500%;
  background: url(../images/ink.png) no-repeat 0 0;
  background-size: 100% 100%;
}
.cd-transition-layer.visible {
  opacity: 1;
  visibility: visible;
}
.cd-transition-layer.opening .bg-layer {
  -webkit-animation: cd-sequence 1s steps(24);
  -moz-animation: cd-sequence 1s steps(24);
  animation: cd-sequence 1s steps(24);
  -webkit-animation-fill-mode: forwards;
  -moz-animation-fill-mode: forwards;
  animation-fill-mode: forwards;
}
.cd-transition-layer.closing .bg-layer {
  -webkit-animation: cd-sequence-reverse 1.3s steps(24);
  -moz-animation: cd-sequence-reverse 1.3s steps(24);
  animation: cd-sequence-reverse 1.3s steps(24);
  -webkit-animation-fill-mode: forwards;
  -moz-animation-fill-mode: forwards;
  animation-fill-mode: forwards;
}

@-webkit-keyframes cd-sequence {
  0% {
    /* translateX(-2%) is used to horizontally center the first frame inside the viewport */
    -webkit-transform: translateY(-50%) translateX(-2%);
  }
  100% {
    /* translateX(-98%) (2% + 96) is used to horizontally center the last frame inside the viewport  */
    -webkit-transform: translateY(-50%) translateX(-98%);
  }
}
@-moz-keyframes cd-sequence {
  0% {
    /* translateX(-2%) is used to horizontally center the first frame inside the viewport */
    -moz-transform: translateY(-50%) translateX(-2%);
  }
  100% {
    /* translateX(-98%) (2% + 96) is used to horizontally center the last frame inside the viewport  */
    -moz-transform: translateY(-50%) translateX(-98%);
  }
}
@keyframes cd-sequence {
  0% {
    /* translateX(-2%) is used to horizontally center the first frame inside the viewport */
    -webkit-transform: translateY(-50%) translateX(-2%);
    -moz-transform: translateY(-50%) translateX(-2%);
    -ms-transform: translateY(-50%) translateX(-2%);
    -o-transform: translateY(-50%) translateX(-2%);
    transform: translateY(-50%) translateX(-2%);
  }
  100% {
    /* translateX(-98%) (2% + 96) is used to horizontally center the last frame inside the viewport  */
    -webkit-transform: translateY(-50%) translateX(-98%);
    -moz-transform: translateY(-50%) translateX(-98%);
    -ms-transform: translateY(-50%) translateX(-98%);
    -o-transform: translateY(-50%) translateX(-98%);
    transform: translateY(-50%) translateX(-98%);
  }
}
@-webkit-keyframes cd-sequence-reverse {
  0% {
    -webkit-transform: translateY(-50%) translateX(-98%);
  }
  100% {
    -webkit-transform: translateY(-50%) translateX(-2%);
  }
}
@-moz-keyframes cd-sequence-reverse {
  0% {
    -moz-transform: translateY(-50%) translateX(-98%);
  }
  100% {
    -moz-transform: translateY(-50%) translateX(-2%);
  }
}
@keyframes cd-sequence-reverse {
  0% {
    -webkit-transform: translateY(-50%) translateX(-98%);
    -moz-transform: translateY(-50%) translateX(-98%);
    -ms-transform: translateY(-50%) translateX(-98%);
    -o-transform: translateY(-50%) translateX(-98%);
    transform: translateY(-50%) translateX(-98%);
  }
  100% {
    -webkit-transform: translateY(-50%) translateX(-2%);
    -moz-transform: translateY(-50%) translateX(-2%);
    -ms-transform: translateY(-50%) translateX(-2%);
    -o-transform: translateY(-50%) translateX(-2%);
    transform: translateY(-50%) translateX(-2%);
  }
}