/* styles.css */

* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
  }
  
  body {
    height: 100vh;
    display: flex;
    background: #202022;
  }
  
  .memory-game {
    width: 640px;
    height: 640px;
    margin: auto;
    display: flex;
    flex-wrap: wrap;
    perspective: 1000px;
  }

  .memory-card {
    width: calc(25% - 10px);
    height: calc(33.333% - 10px);
    margin: 5px;
    position: relative;
    box-shadow: 1px 1px 1px rgba(0,0,0,.3);
    transform: scale(1);
    transform-style: preserve-3d;
    transition: transform .5s;
     
  }

  .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: #46647c;
  backface-visibility: hidden;
  }

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