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);
}

.bp-bubble {
  max-width: min(280px, 84vw);
  padding: 16px 20px;
  border-radius: 16px;
  box-sizing: border-box;
  background: #0a4fe8;
  color: #fff7e6;
  font: 500 14px/1.5 -apple-system, "Segoe UI", sans-serif;
  box-shadow: 0 6px 12px rgba(23, 20, 26, 0.32);
}

@keyframes bp-pop {
  0% {
    transform: scale(0.82);
    opacity: 0;
  }
  15% {
    transform: scale(1.05);
    opacity: 1;
  }
  25% {
    transform: scale(1);
    opacity: 1;
  }
  70% {
    transform: scale(1);
    opacity: 1;
  }
  85% {
    transform: scale(0.9);
    opacity: 0;
  }
  100% {
    transform: scale(0.82);
    opacity: 0;
  }
}
.bp-bubble.is-demo {
  animation: bp-pop 2s cubic-bezier(0.2, 1.4, 0.4, 1) infinite;
}

@media (prefers-reduced-motion: reduce) {
  .bp-bubble.is-demo {
    animation: none !important;
    transform: none !important;
    opacity: 1 !important;
  }
}