.m-wrap {
  position: relative;
  height: 500px;
  min-height: 500px;
  padding-bottom: 10px;
}

.m-game {
  -webkit-transform-style: preserve-3d;
          transform-style: preserve-3d;
  -webkit-perspective: 500px;
          perspective: 500px;
  min-height: 100%;
  height: 100%;
}

@-webkit-keyframes matchAnim {
  0% {
    background: #404040;
  }
  100% {
    background: black;
  }
}

@keyframes matchAnim {
  0% {
    background: #404040;
  }
  100% {
    background: black;
  }
}
.card {
  float: left;
  width: 16.66666%;
  height: 25%;
  padding: 5px;
  text-align: center;
  display: block;
  -webkit-perspective: 500px;
          perspective: 500px;
  position: relative;
  cursor: pointer;
  z-index: 30;
  -webkit-tap-highlight-color: transparent;
}
@media (max-width: 800px) {
  .card {
    width: 25%;
    height: 16.666%;
  }
}
.card .inside {
  width: 100%;
  height: 100%;
  display: block;
  -webkit-transform-style: preserve-3d;
          transform-style: preserve-3d;
  -webkit-transition: .4s ease-in-out;
          transition: .4s ease-in-out;
}
.card .inside.picked, .card .inside.matched {
  -webkit-transform: rotateY(180deg);
          transform: rotateY(180deg);
}
.card .inside.matched {
  -webkit-animation: 1s matchAnim ease-in-out;
          animation: 1s matchAnim ease-in-out;
  -webkit-animation-delay: .4s;
          animation-delay: .4s;
}
.card .front, .card .back {
  -webkit-backface-visibility: hidden;
          backface-visibility: hidden;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}
.card .front img, .card .back img {
  max-width: 100%;
  display: block;
  margin: 0 auto;
  max-height: 100%;
}
.card .front {
  -webkit-transform: rotateY(-180deg);
          transform: rotateY(-180deg);
}

.card .back {		  
		  transform: rotateY(360deg);
}

@media (max-width: 800px) {
  .card .front {
    padding: 5px;
  }
}
@media (max-width: 800px) {
  .card .back {
    padding: 10px;
  }
}