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);
}

.stage {
  position: relative;
}

.ctaflp__panel {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 20px;
  border-radius: 16px;
  background: #ffffff;
}

.ctaflp__scene {
  perspective: 480px;
}

.ctaflp__btn {
  position: relative;
  width: 140px;
  height: 52px;
  border: 0;
  border-radius: 12px;
  background: none;
  padding: 0;
  cursor: pointer;
  transform-style: preserve-3d;
}

.ctaflp__face {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  border-radius: 12px;
  font-family: inherit;
  font-weight: 700;
  font-size: 15px;
  backface-visibility: hidden;
}

.ctaflp__face--front {
  background: #0a4fe8;
  color: #fff7e6;
}

.ctaflp__face--back {
  background: #b9a0ff;
  color: #17141a;
  transform: rotateY(180deg);
}

.ctaflp__hint {
  color: rgba(23, 20, 26, 0.72);
  font-size: 12px;
  text-align: center;
}

@media (max-width: 340px) {
  .ctaflp__panel {
    padding: 16px;
    gap: 12px;
  }
  .ctaflp__btn {
    width: 120px;
    height: 46px;
  }
  .ctaflp__face {
    font-size: 14px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .ctaflp__btn {
    transition: none !important;
  }
}