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);
}

.ts09-list {
  margin: 0;
  padding: 0;
  list-style: none;
  width: min(200px, 76vw);
  counter-reset: n 0;
}

.ts09-step {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 0 8px 40px;
  color: #fff7e6;
  font: 600 13px/1 -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  opacity: 0;
  transform: scale(0.7);
  counter-increment: n;
}
.ts09-step::before {
  content: counter(n);
  position: absolute;
  left: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: #2f6df6;
  color: #fff7e6;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 12px;
  line-height: 1;
  font-family: inherit;
}

@supports (z-index: calc(sibling-index())) {
  .ts09-step {
    counter-increment: none;
    counter-set: n calc(sibling-index());
    animation-delay: calc((sibling-index() - 1) * 120ms);
  }
}
.ts09-list.is-demo .ts09-step {
  animation: ts09-in 2s cubic-bezier(0.2, 1.4, 0.4, 1) infinite;
}

@keyframes ts09-in {
  0% {
    opacity: 0;
    transform: scale(0.7);
  }
  20% {
    opacity: 1;
    transform: scale(1.08);
  }
  32% {
    opacity: 1;
    transform: scale(1);
  }
  90% {
    opacity: 1;
    transform: scale(1);
  }
  100% {
    opacity: 0;
    transform: scale(0.7);
  }
}
@media (prefers-reduced-motion: reduce) {
  .ts09-step, .ts09-list.is-demo .ts09-step {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
}