html, body {
  margin: 0;
  overflow: hidden;
}

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #ffffff;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.ch-table {
  width: min(320px, 88vw);
  aspect-ratio: 320/180;
  display: flex;
  gap: 8px;
}

.ch-col {
  flex: 1 1 0;
  box-sizing: border-box;
  border-radius: 8px;
  border: 2px solid transparent;
  padding: 12px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 4px;
  background: rgba(23, 20, 26, 0.05);
  color: #17141a;
  font: 600 12px/1 -apple-system, "Segoe UI", sans-serif;
  transition: transform 180ms ease-out, border-color 180ms ease-out, background 180ms ease-out;
}

.ch-col__tag {
  opacity: 0.7;
  font-size: 11px;
}

.ch-col__price {
  font-size: 18px;
  font-weight: 700;
}

.ch-col:hover {
  transform: scale(1.05);
  border-color: #2f6df6;
  background: rgba(23, 20, 26, 0.08);
}

@keyframes ch-pulse {
  0%, 66%, 100% {
    transform: scale(1);
    border-color: transparent;
  }
  16% {
    transform: scale(1.05);
    border-color: #2f6df6;
  }
}
.ch-table.is-demo .ch-col {
  animation: ch-pulse 3s ease-out infinite;
}

.ch-table.is-demo .ch-col:nth-child(2) {
  animation-delay: 1s;
}

.ch-table.is-demo .ch-col:nth-child(3) {
  animation-delay: 2s;
}

@media (prefers-reduced-motion: reduce) {
  .ch-col:hover,
  .ch-table.is-demo .ch-col {
    animation: none !important;
    transform: none !important;
    border-color: transparent !important;
  }
}