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

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

.cb-scene {
  perspective: 700px;
}

.cb-cube {
  --cb-step: 0;
  position: relative;
  width: 110px;
  height: 110px;
  border: 0;
  padding: 0;
  background: none;
  cursor: pointer;
  transform-style: preserve-3d;
  transform: rotateY(calc(var(--cb-step) * -90deg));
  transition: transform 600ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.cb-cube:focus-visible {
  outline: 3px solid #17141a;
  outline-offset: 8px;
}

.cb-face {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 16px;
  backface-visibility: hidden;
  font: 700 14px/1 -apple-system, "Segoe UI", sans-serif;
  color: #fff7e6;
}

.cb-face--1 {
  background: #0a4fe8;
  transform: rotateY(0deg) translateZ(55px);
}

.cb-face--2 {
  background: rgba(23, 20, 26, 0.82);
  transform: rotateY(90deg) translateZ(55px);
}

.cb-face--3 {
  background: #0a4fe8;
  transform: rotateY(180deg) translateZ(55px);
}

.cb-face--4 {
  background: rgba(23, 20, 26, 0.82);
  transform: rotateY(270deg) translateZ(55px);
}

@keyframes cb-spin {
  0%, 15% {
    transform: rotateY(0);
  }
  30%, 40% {
    transform: rotateY(-90deg);
  }
  55%, 65% {
    transform: rotateY(-180deg);
  }
  80%, 90% {
    transform: rotateY(-270deg);
  }
  100% {
    transform: rotateY(-360deg);
  }
}
.cb-cube.is-demo {
  animation: cb-spin 3000ms cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

@media (prefers-reduced-motion: reduce) {
  .cb-cube {
    animation: none !important;
    transition: none !important;
  }
  .cb-cube.is-demo {
    animation: none !important;
  }
}