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);
}

.ts01-timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 32px;
  list-style: none;
  color: #fff7e6;
  font: 500 13px/1 -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
}

.ts01-step {
  position: relative;
  padding: 4px 0;
  margin-bottom: clamp(16px, 6vw, 24px);
}
.ts01-step:last-of-type {
  margin-bottom: 0;
}

.ts01-dot {
  position: absolute;
  left: -28px;
  top: 3px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #fff7e6;
  border: 2px solid #17141a;
  box-shadow: 0 0 0 2px #2f6df6;
}

.ts01-line {
  position: absolute;
  left: -23px;
  top: 4px;
  width: 3px;
  height: calc(100% - 12px);
  background: #2f6df6;
  border-radius: 4px;
  transform: scaleY(1);
  transform-origin: top;
}
@supports (animation-timeline: view()) {
  .ts01-line {
    transform: scaleY(0);
    animation: ts01-draw linear both;
    animation-timeline: view();
    animation-range: entry 0% cover 70%;
  }
}

@keyframes ts01-draw {
  from {
    transform: scaleY(0);
  }
  to {
    transform: scaleY(1);
  }
}
.ts01-timeline.is-demo .ts01-line {
  animation: ts01-draw-loop 600ms ease-out infinite;
}

@keyframes ts01-draw-loop {
  0%, 8% {
    transform: scaleY(0);
  }
  75%, 100% {
    transform: scaleY(1);
  }
}
@media (prefers-reduced-motion: reduce) {
  .ts01-line, .ts01-timeline.is-demo .ts01-line {
    animation: none !important;
    transform: scaleY(1) !important;
  }
}