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

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #17141a;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.as {
  width: min(400px, 92vw);
}

.as__radio {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.as__track {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.as__slide {
  flex: 0 0 30%;
  aspect-ratio: 3/4;
  border-radius: 16px;
  position: relative;
  overflow: hidden;
  cursor: pointer;
  transform: scale(0.82);
  opacity: 0.5;
  transition: transform 300ms cubic-bezier(0.2, 0.8, 0.2, 1), opacity 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
  z-index: 0;
}

.as__slide--1 {
  background: linear-gradient(160deg, #2f6df6, #d6ddeb);
}

.as__slide--2 {
  background: linear-gradient(160deg, #ff4d1f, #ebdbd6);
}

.as__slide--3 {
  background: linear-gradient(160deg, #c2ae82, #ffd23f);
}

.as__slide::before {
  content: "";
  position: absolute;
  top: 8px;
  right: 8px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.85);
}

.as__slide::after {
  content: "";
  position: absolute;
  left: -10%;
  right: -10%;
  bottom: -6%;
  height: 46%;
  background: rgba(23, 20, 26, 0.26);
  clip-path: polygon(0% 100%, 22% 40%, 42% 66%, 60% 26%, 78% 60%, 100% 34%, 100% 100%);
}

#as-1:checked ~ .as__track .as__slide--1,
#as-2:checked ~ .as__track .as__slide--2,
#as-3:checked ~ .as__track .as__slide--3 {
  transform: scale(1.08);
  opacity: 1;
  z-index: 1;
}

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

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

.as.is-demo .as__slide--3 {
  animation: as-3 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

@keyframes as-1 {
  0% {
    transform: scale(0.82);
    opacity: 0.5;
  }
  4%, 29% {
    transform: scale(1.08);
    opacity: 1;
  }
  54%, 100% {
    transform: scale(0.82);
    opacity: 0.5;
  }
}
@keyframes as-2 {
  0%, 29% {
    transform: scale(0.82);
    opacity: 0.5;
  }
  33%, 62% {
    transform: scale(1.08);
    opacity: 1;
  }
  66%, 100% {
    transform: scale(0.82);
    opacity: 0.5;
  }
}
@keyframes as-3 {
  0%, 62% {
    transform: scale(0.82);
    opacity: 0.5;
  }
  66%, 96% {
    transform: scale(1.08);
    opacity: 1;
  }
  100% {
    transform: scale(0.82);
    opacity: 0.5;
  }
}
@media (prefers-reduced-motion: reduce) {
  .as__slide {
    transition: none;
  }
  .as.is-demo .as__slide--1,
  .as.is-demo .as__slide--2,
  .as.is-demo .as__slide--3 {
    animation: none !important;
  }
}