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);
}

.dt {
  width: min(300px, 80vw);
}

.dt__viewport {
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  border-radius: 16px;
  scrollbar-width: none;
}
.dt__viewport::-webkit-scrollbar {
  display: none;
}

.dt__track {
  display: flex;
  width: max-content;
}

.dt__slide {
  flex: 0 0 min(300px, 80vw);
  aspect-ratio: 16/9;
  scroll-snap-align: start;
  scroll-margin-left: 0;
}

.dt__slide--1 {
  background: linear-gradient(135deg, #17141a, #4a3f5c);
}

.dt__slide--2 {
  background: linear-gradient(135deg, #2f6df6, #d6ddeb);
}

.dt__slide--3 {
  background: linear-gradient(135deg, #ffd23f, #ebe7d6);
}

.dt__dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 12px;
}

.dt__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(23, 20, 26, 0.28);
  transition: transform 300ms cubic-bezier(0.2, 0.8, 0.2, 1), background 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.dt:has(#dt-s1:target) .dt__dot--1,
.dt:has(#dt-s2:target) .dt__dot--2,
.dt:has(#dt-s3:target) .dt__dot--3 {
  background: #ffd23f;
  transform: scale(1.4);
}

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

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

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

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

@keyframes dt-track {
  0%, 8% {
    transform: translateX(0);
  }
  31%, 39% {
    transform: translateX(-25%);
  }
  62%, 70% {
    transform: translateX(-50%);
  }
  92%, 100% {
    transform: translateX(-75%);
  }
}
@keyframes dt-dot-1 {
  0%, 4% {
    background: #ffd23f;
    transform: scale(1.4);
  }
  29%, 88% {
    background: rgba(23, 20, 26, 0.28);
    transform: scale(1);
  }
  92%, 100% {
    background: #ffd23f;
    transform: scale(1.4);
  }
}
@keyframes dt-dot-2 {
  0%, 29% {
    background: rgba(23, 20, 26, 0.28);
    transform: scale(1);
  }
  33%, 62% {
    background: #ffd23f;
    transform: scale(1.4);
  }
  66%, 100% {
    background: rgba(23, 20, 26, 0.28);
    transform: scale(1);
  }
}
@keyframes dt-dot-3 {
  0%, 62% {
    background: rgba(23, 20, 26, 0.28);
    transform: scale(1);
  }
  66%, 96% {
    background: #ffd23f;
    transform: scale(1.4);
  }
  100% {
    background: rgba(23, 20, 26, 0.28);
    transform: scale(1);
  }
}
@media (prefers-reduced-motion: reduce) {
  .dt.is-demo .dt__track,
  .dt.is-demo .dt__dot--1,
  .dt.is-demo .dt__dot--2,
  .dt.is-demo .dt__dot--3 {
    animation: none !important;
  }
  .dt__viewport {
    scroll-behavior: auto;
  }
}