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);
}

.ctaband {
  position: relative;
  overflow: hidden;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
  width: clamp(260px, 86vw, 400px);
  border-radius: 16px;
  background: #17141a;
  padding: 24px 20px;
  box-shadow: 10px 10px 20px rgba(23, 20, 26, 0.3), -6px -6px 16px rgba(255, 255, 255, 0.18);
}

.ctaband__glow {
  position: absolute;
  top: -30%;
  right: -10%;
  width: 50%;
  aspect-ratio: 1;
  border-radius: 999px;
  background: rgba(47, 109, 246, 0.35);
  animation: glowPulse 2s cubic-bezier(0.2, 1.4, 0.4, 1) infinite;
}

.ctaband__title {
  position: relative;
  margin: 0;
  max-width: 70%;
  color: #fff7e6;
  font-weight: 700;
  font-size: clamp(16px, 4vw, 20px);
  line-height: 1.3;
}

.ctaband__cta {
  position: relative;
  border: 0;
  border-radius: 999px;
  background: #fff7e6;
  color: #17141a;
  padding: 8px 24px;
  font-weight: 700;
  font-size: clamp(12px, 2.8vw, 14px);
  line-height: 1;
  box-shadow: 4px 4px 8px rgba(23, 20, 26, 0.4);
  animation: ctaPress 2s cubic-bezier(0.2, 1.4, 0.4, 1) infinite;
}

@keyframes glowPulse {
  0%, 100% {
    transform: scale(1);
    opacity: 0.35;
  }
  50% {
    transform: scale(1.15);
    opacity: 0.55;
  }
}
@keyframes ctaPress {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.06);
  }
}
@media (prefers-reduced-motion: reduce) {
  .ctaband__glow, .ctaband__cta {
    animation: none !important;
    transform: none;
    opacity: 0.35;
  }
}