* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}

body {
  height: 100vh;
  display: flex;
  background: #e9e9e9;
}

.memory-game {
  width: fit-content;
  max-width: 100%;
  height: auto;
  margin: auto;
  display: flex;
  flex-wrap: wrap;
  perspective: 1000px;
  justify-content: center;
}

.memory-card {
  width: 20vw;
  height: 17vw;
  margin: 5px;
  position: relative;
  transform: scale(1);
  transform-style: preserve-3d;
  transition: transform .5s;
  box-shadow: 1px 1px 1px rgba(0,0,0,.3);
}

.memory-card:active {
  transform: scale(0.97);
  transition: transform .2s;
}

.memory-card.flip {
  transform: rotateY(180deg);
}

.front-face,
.back-face {
  width: 100%;
  height: 100%;
  padding: 20px;
  position: absolute;
  border-radius: 5px;
  background: #024780;
  backface-visibility: hidden;
}

.front-face {
  transform: rotateY(180deg);
}

@media (max-width: 800px){
  .memory-card{

  }
}
