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);
}

.list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: min(280px, 88vw);
}

.list__item {
  padding: 8px 16px;
  border-radius: 8px;
  background: rgba(255, 247, 230, 0.08);
  color: #fff7e6;
  font-weight: 500;
  font-size: clamp(12px, 3.4vw, 14px);
  line-height: 1.3;
  font-family: inherit;
  opacity: 0;
  transform: translateY(10px);
}

.list.is-demo .list__item {
  animation: stagger-in-loop 2s ease-out infinite;
  animation-delay: calc(var(--i) * 80ms);
}

@keyframes stagger-in-loop {
  0% {
    opacity: 0;
    transform: translateY(10px);
  }
  20% {
    opacity: 1;
    transform: translateY(0);
  }
  75% {
    opacity: 1;
    transform: translateY(0);
  }
  100% {
    opacity: 0;
    transform: translateY(10px);
  }
}
.list.is-appear .list__item {
  animation: stagger-in 400ms ease-out both;
  animation-delay: calc(var(--i) * 80ms);
}

@keyframes stagger-in {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
@media (prefers-reduced-motion: reduce) {
  .list__item {
    animation: none !important;
    opacity: 1;
    transform: none;
  }
}