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);
}

.bb-scene {
  position: relative;
  width: min(340px, 90vw);
  aspect-ratio: 340/190;
  overflow: hidden;
  border-radius: 16px;
}

.bb-blob {
  position: absolute;
  width: 170px;
  height: 170px;
  border-radius: 50%;
  filter: blur(26px);
  opacity: 0.88;
}

.bb-blob--a {
  background: #2f6df6;
  top: -40px;
  left: -30px;
  animation: bb-drift-a 2s linear infinite;
}

.bb-blob--b {
  background: #ff4d1f;
  bottom: -50px;
  right: -20px;
  animation: bb-drift-b 2s linear infinite;
}

@keyframes bb-drift-a {
  0%, 100% {
    transform: translate(0, 0);
  }
  50% {
    transform: translate(110px, 70px);
  }
}
@keyframes bb-drift-b {
  0%, 100% {
    transform: translate(0, 0);
  }
  50% {
    transform: translate(-90px, -55px);
  }
}
.bb-panel {
  position: absolute;
  inset: auto 16px 16px 16px;
  box-sizing: border-box;
  padding: 16px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.22);
  border: 1px solid rgba(255, 255, 255, 0.4);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  box-shadow: 0 6px 12px rgba(23, 20, 26, 0.32);
  display: flex;
  flex-direction: column;
  gap: 4px;
  color: #17141a;
  font: 600 12px/1.3 -apple-system, "Segoe UI", sans-serif;
}

.bb-panel__title {
  font-weight: 700;
  font-size: 13px;
}

.bb-panel__desc {
  opacity: 0.75;
}

@media (prefers-reduced-motion: reduce) {
  .bb-blob {
    animation: none !important;
  }
}