body {
  align-items: center;
  background-image: radial-gradient(circle 448px at center, #16d9e3 0%, #30c7ec 47%, #46aef7 100%);
  display: flex;
  height: 100vh;
  justify-content: center;
  overflow: hidden;
  perspective: 800px;
}



.board {
  display: grid;
  grid-gap: 10px;
  grid-template-columns: repeat(4, 100px);
  grid-template-rows: repeat(4, 100px);
  position: relative;
  top: 0px;
  transform-style: preserve-3d;
  transform: rotateX(10deg) ;
  -webkit-user-select: none;
     -moz-user-select: none;
      -ms-user-select: none;
          user-select: none;
}

.clone {
  display: none;
}

.cube {
  -webkit-animation: enter 600ms ease-out;
          animation: enter 600ms ease-out;
  transform-style: preserve-3d;
  transform: translateZ(0) scale(1);
  transition: all 350ms ease-out;
  transform-origin: 50% 50%;
  -webkit-backface-visibility: hidden;
          backface-visibility: hidden;
}
.cube.flipped {
  pointer-events: none;
  transform: rotateY(180deg) translateZ(0) scale(1);
  transition: all 500ms ease-out;
}
.cube.matched {
  pointer-events: none;
  transform: rotateY(180deg) translateZ(0) scale(1);
  -webkit-animation: match 650ms ease-out;
          animation: match 650ms ease-out;
}

.face {
  outline: 1px solid transparent;
  -webkit-backface-visibility: hidden;
          backface-visibility: hidden;
  box-shadow: inset 0 0 2px 1px #fff0d2;
  height: 100px;
  overflow: hidden;
  position: absolute;
  transform-origin: 50% 50%;
  width: 100px;
}

.face:nth-child(1) {
  background-color: wheat;
  cursor: pointer;
  transform: rotateY(0deg) translateZ(10px);
  transition: background 150ms ease-out;
}
.face:nth-child(1):before {
  align-items: center;
  bottom: 0;
  color: #93794c;
  content: "?";
  display: flex;
  font-size: 60px;
  justify-content: center;
  left: 0;
  position: absolute;
  right: 0;
  top: 0;
}

.face:nth-child(2) {
  background-color: #efca86;
  width: 20px;
  transform: rotateY(90deg) translateZ(90px);
}

.face:nth-child(3) {
  background-color: dodgerblue;
  transform: rotateY(180deg) translateZ(10px);
}

.face:nth-child(4) {
  background-color: #efca86;
  width: 20px;
  transform: rotateY(270deg) translateZ(10px);
}

.face:nth-child(5) {
  background-color: #efca86;
  height: 20px;
  transform: rotateX(90deg) translateZ(10px);
}

.face:nth-child(6) {
  background-color: #efca86;
  height: 20px;
  transform: rotateX(-90deg) translateZ(90px);
}

.overlay {
  align-items: center;
  background: rgba(255, 255, 255, 0.75);
  width: 100vw;
  display: flex;
  justify-content: center;
  left: 0;
  opacity: 1;
  position: absolute;
  height: 100vh;
  top: 0;
  transition: all 500ms ease-out;
  z-index: 100;
}
.overlay.hidden {
  opacity: 0;
  pointer-events: none;
  transition: all 300ms ease-out;
}
.overlay.hidden .gameover {
  transform: translateY(60px);
  transition: all 300ms ease-out;
}

.gameover {
  align-items: center;
  background-color: #fff;
  border-radius: 10px;
  border: 12px solid #50b8f7;
  color: #2e2e2e;
  display: flex;
  font-size: 40px;
  height: 120px;
  width: 340px;
  justify-content: space-between;
  padding: 0 10px 0 30px;
  transform: translateY(0);
  transition: all 500ms ease-out;
  -webkit-user-select: none;
     -moz-user-select: none;
      -ms-user-select: none;
          user-select: none;
}

.reset {
  background-color: #fbc300;
  border-radius: 50%;
  border: 0;
  box-shadow: 0px 6px 0px 0px #f2a003;
  cursor: pointer;
  display: block;
  height: 94px;
  margin-left: 20px;
  position: relative;
  top: -3px;
  width: 96px;
}
.reset:active {
  box-shadow: none;
  top: 0;
}
.reset:focus {
  outline: 0;
}

.twitter__link {
  -webkit-user-select: none;
     -moz-user-select: none;
      -ms-user-select: none;
          user-select: none;
  cursor: pointer;
  position: absolute;
  right: 10px;
  top: 12px;
  z-index: -1;
  background: #fff;
  border-radius: 20px;
  height: 30px;
  text-decoration: none;
  padding-right: 10px;
  justify-content: space-between;
  font-family: sans-serif;
  font-weight: 600;
  display: flex;
  align-items: center;
  color: #00aced;
  font-size: 14px;
  width: 74px;
  opacity: 0.4;
  z-index: 10;
}
.twitter__link:hover {
  opacity: 1;
}

.twitter__icon {
  height: 30px;
}

[data-tile=a] div:nth-child(3) {
  background: #fff8e7 url("eik1.jpeg") center center no-repeat;
  background-size: 100%;
}

[data-tile=b] div:nth-child(3) {
  background: #fff8e7 url("eik2.jpeg") bottom center no-repeat;
  background-size: 100%;
}

[data-tile=c] div:nth-child(3) {
  background: #fff8e7 url("eik3.jpeg") center center no-repeat;
  background-size: 100%;
}

[data-tile=d] div:nth-child(3) {
  background: #fff8e7 url("eik4.jpeg") center center no-repeat;
  background-size: 100%;
}

[data-tile=e] div:nth-child(3) {
  background: #fff8e7 url("eik5.jpeg") center center no-repeat;
  background-size: 100%;
}

[data-tile=f] div:nth-child(3) {
  background: #fff8e7 url("eik6.jpeg") center center no-repeat;
  background-size: 100%;
}

[data-tile=g] div:nth-child(3) {
  background: #fff8e7 url("eik7.jpeg") center center no-repeat;
  background-size: 100%;
}

[data-tile=h] div:nth-child(3) {
  background: #fff8e7 url("eik8.jpeg") center center no-repeat;
  background-size: 100%;
}

[data-tile=i] div:nth-child(3) {
  background: #fff8e7 url("eik9.jpeg") center center no-repeat;
  background-size: 100%;
}

[data-tile=j] div:nth-child(3) {
  background: #fff8e7 url("eik10.jpeg") center center no-repeat;
  background-size: 100%;
}

[data-tile=k] div:nth-child(3) {
  background: #fff8e7 url("eik11.jpeg") center center no-repeat;
  background-size: 100%;
}

[data-tile=l] div:nth-child(3) {
  background: #fff8e7 url("eik12.jpeg") center center no-repeat;
  background-size: 100%;
}

[data-tile=m] div:nth-child(3) {
  background: #fff8e7 url("eik13.jpeg") center center no-repeat;
  background-size: 100%;
}

[data-tile=n] div:nth-child(3) {
  background: #fff8e7 url("eik14.jpeg") center center no-repeat;
  background-size: 100%;
}

[data-tile=o] div:nth-child(3) {
  background: #fff8e7 url("eik15.jpeg") center center no-repeat;
  background-size: 100%;
}

[data-tile=p] div:nth-child(3) {
  background: #fff8e7 url("eik16.jpeg") center center no-repeat;
  background-size: 100%;
}


@-webkit-keyframes enter {
  0% {
    transform: translateZ(-20px) scale(0.3);
  }
  50% {
    transform: translateZ(20px) scale(1.02);
  }
  100% {
    transform: translateZ(0) scale(1);
  }
}

/* @keyframes enter { */
  /* 0% { */
    /* transform: translateZ(-20px) scale(0.3); */
  /* } */
  /* 50% { */
    /* transform: translateZ(20px) scale(1.02); */
  /* } */
  /* 100% { */
    /* transform: translateZ(0) scale(1); */
  /* } */
/* } */
/* @-webkit-keyframes match { */
  /* 0% { */
    /* transform: rotateY(180deg) translateZ(-15px); */
  /* } */
  /* 50% { */
    /* transform: rotateY(180deg) translateZ(10px); */
  /* } */
  /* 100% { */
    /* transform: rotateY(180deg) translateZ(0); */
  /* } */
/* } */
/* @keyframes match { */
  /* 0% { */
    /* transform: rotateY(180deg) translateZ(-15px); */
  /* } */
  /* 50% { */
    /* transform: rotateY(180deg) translateZ(10px); */
  /* } */
  /* 100% { */
    /* transform: rotateY(180deg) translateZ(0); */
  /* } */
/* } */


@media(max-width: 600px) {
.cube {
  transform: translateZ(0) scale(0.4);
}
.cube.flipped {
  transform: rotateY(180deg) translateZ(0) scale(0.4);
}
.cube.matched {
  transform: rotateY(180deg) translateZ(0) scale(0.4);
}
.board {
  grid-template-columns: repeat(4, 50px);
  grid-template-rows: repeat(4, 50px);
}

@-webkit-keyframes enter {
  0% {
    transform: translateZ(-20px) scale(0.5);
  }
  50% {
    transform: translateZ(20px) scale(0.6);
  }
  100% {
    transform: translateZ(0) scale(0.4);
  }
}

}