:root {
  color-scheme: light dark;
  --fg: light-dark(black, white);
  --alt: light-dark(hsl(0 0 0 / 0.2), hsla(0, 0%, 100%, 0.2));
}

.wrapper {
  position: fixed;
  inset: 0;
}

.container {
  perspective: 1000px;
  perspective-origin: 50% 50%;
  width: 100vw;
  height: 100vh;
  display: grid;
  place-items: center;
  justify-content: center;
}

.cube {
  position: relative;
  width: 200px;
  height: 200px;
  transform-style: preserve-3d;
  animation: rotate 6s linear infinite;
}

.cube > div {
  position: absolute;
  width: 200px;
  height: 200px;
  opacity: 0.9;
  background: linear-gradient(to right, var(--fg), var(--alt));
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 2rem;
}

.s1 {
  transform: translateZ(100px);
}

.s2 {
  transform: rotateY(90deg) translateZ(100px);
}

.s3 {
  transform: rotateY(180deg) translateZ(100px);
}

.s4 {
  transform: rotateX(90deg) translateZ(100px);
}

.s5 {
  transform: rotateY(-90deg) translateZ(100px);
}

.s6 {
  transform: rotateX(-90deg) translateZ(100px) rotate(180deg);
}

@keyframes rotate {
  100% {
    transform: rotateX(0deg) rotateY(360deg) rotateZ(360deg);
  }
}
3D Cube
