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);
}

.vt-frame {
  position: relative;
  width: min(260px, 84vw);
  aspect-ratio: 260/170;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 14px 24px rgba(23, 20, 26, 0.32);
}

.vt-layer {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: #fff7e6;
}

.vt-layer--a {
  background: linear-gradient(160deg, #17141a, rgba(23, 20, 26, 0.8));
}

.vt-layer--b {
  background: linear-gradient(160deg, #2f6df6, rgba(23, 20, 26, 0.85));
}

.vt-chip {
  padding: 8px 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.16);
  font: 700 13px/1 -apple-system, "Segoe UI", sans-serif;
}

.vt-layer--b {
  opacity: 0;
}

@keyframes vt-cross-out {
  0%, 20% {
    opacity: 1;
  }
  80%, 100% {
    opacity: 0;
  }
}
@keyframes vt-cross-in {
  0%, 20% {
    opacity: 0;
  }
  80%, 100% {
    opacity: 1;
  }
}
.vt-frame.is-demo .vt-layer--a {
  animation: vt-cross-out 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

.vt-frame.is-demo .vt-layer--b {
  animation: vt-cross-in 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

@media (prefers-reduced-motion: reduce) {
  .vt-frame.is-demo .vt-layer--a,
  .vt-frame.is-demo .vt-layer--b {
    animation: none !important;
  }
  .vt-layer--a {
    opacity: 1;
  }
  .vt-layer--b {
    opacity: 0;
  }
}