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);
}

.dots {
  position: fixed;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(23, 20, 26, 0.28);
  transition: transform 200ms ease-out, background 200ms ease-out;
}

.dot.is-active {
  transform: scale(1.6);
  background: #fff7e6;
}

.dots.is-demo .dot {
  animation: pulse 2s linear infinite;
}

.dots.is-demo .dot:nth-child(1) {
  animation-delay: 0s;
}

.dots.is-demo .dot:nth-child(2) {
  animation-delay: 0.333s;
}

.dots.is-demo .dot:nth-child(3) {
  animation-delay: 0.667s;
}

.dots.is-demo .dot:nth-child(4) {
  animation-delay: 1s;
}

.dots.is-demo .dot:nth-child(5) {
  animation-delay: 1.333s;
}

.dots.is-demo .dot:nth-child(6) {
  animation-delay: 1.667s;
}

@keyframes pulse {
  0%, 83.34%, 100% {
    transform: scale(1);
    background: rgba(23, 20, 26, 0.28);
  }
  8.33%, 16.66% {
    transform: scale(1.6);
    background: #fff7e6;
  }
}
@media (prefers-reduced-motion: reduce) {
  .dots.is-demo .dot {
    animation: none !important;
  }
  .dots.is-demo .dot:first-child {
    transform: scale(1.6);
    background: #fff7e6;
  }
}