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);
}

.stack {
  position: relative;
  width: 128px;
  height: 148px;
  outline: none;
}

.polaroid {
  position: absolute;
  inset: 0;
  padding: 8px 8px 24px;
  background: #fff7e6;
  border-radius: 4px;
  box-shadow: 0 6px 12px rgba(23, 20, 26, 0.32);
  transform-origin: 50% 85%;
}

.polaroid__photo {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 4px;
}

.polaroid__photo--a {
  background: linear-gradient(160deg, #ff9ebb 0%, #b9a0ff 100%);
}

.polaroid__photo--b {
  background: linear-gradient(160deg, #4cd4a6 0%, #b9a0ff 100%);
}

.polaroid__photo--c {
  background: linear-gradient(160deg, #6ec8ff 0%, #b9a0ff 100%);
}

.polaroid__photo--d {
  background: linear-gradient(160deg, #b9a0ff 0%, #ff9ebb 100%);
}

.polaroid--1 {
  transform: rotate(-8deg) translate(-6px, 4px);
  z-index: 1;
}

.polaroid--2 {
  transform: rotate(5deg) translate(4px, 1px);
  z-index: 2;
}

.polaroid--3 {
  transform: rotate(-3deg) translate(-2px, -2px);
  z-index: 3;
}

.polaroid--4 {
  transform: rotate(2deg) translate(1px, -4px);
  z-index: 4;
}

.stack.is-demo .polaroid--1 {
  animation: shuffle-1 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

.stack.is-demo .polaroid--2 {
  animation: shuffle-2 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
  animation-delay: -0.5s;
}

.stack.is-demo .polaroid--3 {
  animation: shuffle-3 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
  animation-delay: -1s;
}

.stack.is-demo .polaroid--4 {
  animation: shuffle-4 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
  animation-delay: -1.5s;
}

@keyframes shuffle-1 {
  0%, 10%, 55%, 100% {
    transform: rotate(-8deg) translate(-6px, 4px);
    opacity: 1;
  }
  30% {
    transform: rotate(-24deg) translate(-64px, -22px) scale(0.94);
    opacity: 0.25;
  }
}
@keyframes shuffle-2 {
  0%, 10%, 55%, 100% {
    transform: rotate(5deg) translate(4px, 1px);
    opacity: 1;
  }
  30% {
    transform: rotate(20deg) translate(60px, -20px) scale(0.94);
    opacity: 0.25;
  }
}
@keyframes shuffle-3 {
  0%, 10%, 55%, 100% {
    transform: rotate(-3deg) translate(-2px, -2px);
    opacity: 1;
  }
  30% {
    transform: rotate(-18deg) translate(-58px, -24px) scale(0.94);
    opacity: 0.25;
  }
}
@keyframes shuffle-4 {
  0%, 10%, 55%, 100% {
    transform: rotate(2deg) translate(1px, -4px);
    opacity: 1;
  }
  30% {
    transform: rotate(16deg) translate(56px, -26px) scale(0.94);
    opacity: 0.25;
  }
}
@media (prefers-reduced-motion: reduce) {
  .stack.is-demo .polaroid--1,
  .stack.is-demo .polaroid--2,
  .stack.is-demo .polaroid--3,
  .stack.is-demo .polaroid--4 {
    animation: none;
  }
}