html, body {
  margin: 0;
  overflow: hidden;
}

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #ff4d1f;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.ar {
  display: grid;
  justify-items: center;
  gap: 16px;
  width: 100%;
}

.ar__scene {
  display: grid;
  place-items: center;
  width: clamp(112px, 30vw, 144px);
  height: clamp(96px, 26vw, 124px);
  perspective: 520px;
}

.ar__scene:focus-visible {
  outline: 3px solid #17141a;
  outline-offset: 8px;
  border-radius: 8px;
}

.ar__prism {
  --s: clamp(64px, 17vw, 84px);
  position: relative;
  width: var(--s);
  height: var(--s);
  transform-style: preserve-3d;
  transform: rotateX(-10deg) rotateY(0deg);
}

.ar__side {
  position: absolute;
  inset: 0;
  border-radius: 8px;
  border: 2px solid rgba(255, 247, 230, 0.5);
}

.ar__side--a {
  background: #fff7e6;
  transform: translateZ(calc(var(--s) / 2));
}

.ar__side--b {
  background: #2f6df6;
  transform: rotateY(90deg) translateZ(calc(var(--s) / 2));
}

.ar__side--c {
  background: #17141a;
  transform: rotateY(180deg) translateZ(calc(var(--s) / 2));
}

.ar__side--d {
  background: #ffd23f;
  transform: rotateY(-90deg) translateZ(calc(var(--s) / 2));
}

.ar__state {
  position: relative;
  margin: 0;
  min-height: 16px;
  color: #17141a;
  font-weight: 800;
  font-size: clamp(9px, 2.4vw, 11px);
  text-align: center;
}

.ar__mode--hand {
  display: none;
}

.ar__prism--auto {
  animation-name: arTurn;
  animation-duration: 8s;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
}

@keyframes arTurn {
  0% {
    transform: rotateX(-10deg) rotateY(0deg);
  }
  100% {
    transform: rotateX(-10deg) rotateY(360deg);
  }
}
.ar.is-demo .ar__prism--auto {
  animation-duration: 2s;
}

@media (max-width: 340px) {
  .ar {
    gap: 12px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .ar__prism--auto {
    animation: none !important;
    transform: rotateX(-10deg) rotateY(-28deg) !important;
  }
}