body {
  margin: 0;
  height: 100vh;
  overflow: hidden;
  font-family: 'Press Start 2P', cursive;
  display: flex;
  justify-content: center;
  align-items: center;
  background: #fff;
}

#checkered-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: grid;
  grid-template-columns: repeat(20, 1fr);
  grid-template-rows: repeat(10, 1fr);
  z-index: 0;
}

#checkered-bg div {
  width: 100%;
  height: 100%;
  animation: warp 5s infinite alternate ease-in-out;
}

@keyframes warp {
  0% { transform: rotate(0deg) scale(1); }
  50% { transform: rotate(3deg) scale(1.05); }
  100% { transform: rotate(-3deg) scale(1); }
}

/* Center box takes 3/4th of the screen */
.center-box {
  position: relative;
  z-index: 1;
  width: 75vw;
  height: 75vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.center-box img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  display: block;
}