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;
  box-sizing: border-box;
  width: clamp(280px, 90vw, 520px);
  padding: 32px 24px;
  border-radius: 16px;
  background: #17141a;
  box-shadow: 0 0 0 1px rgba(255, 210, 63, 0.4), 0 0 24px rgba(255, 210, 63, 0.16);
  overflow: hidden;
}

.ctaband__scan {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(45deg, rgba(255, 210, 63, 0) 0 6px, rgba(255, 210, 63, 0.12) 6px 7px);
  background-size: 200% 200%;
  background-position: 0% 0%;
  animation: diagDrift 2s linear infinite;
}

@keyframes diagDrift {
  0% {
    background-position: 0% 0%;
  }
  100% {
    background-position: 100% 100%;
  }
}
.ctaband__corner {
  position: absolute;
  width: 20px;
  height: 20px;
  pointer-events: none;
  border-color: #ffd23f;
  border-style: solid;
  border-width: 0;
  animation: cornerPulse 2s ease-out infinite;
}

.ctaband__corner--tl {
  top: 12px;
  left: 12px;
  border-top-width: 2px;
  border-left-width: 2px;
  transform-origin: top left;
}

.ctaband__corner--tr {
  top: 12px;
  right: 12px;
  border-top-width: 2px;
  border-right-width: 2px;
  transform-origin: top right;
  animation-delay: -0.15s;
}

.ctaband__corner--bl {
  bottom: 12px;
  left: 12px;
  border-bottom-width: 2px;
  border-left-width: 2px;
  transform-origin: bottom left;
  animation-delay: -0.3s;
}

.ctaband__corner--br {
  bottom: 12px;
  right: 12px;
  border-bottom-width: 2px;
  border-right-width: 2px;
  transform-origin: bottom right;
  animation-delay: -0.45s;
}

@keyframes cornerPulse {
  0%, 100% {
    transform: scale(0.55);
    opacity: 0.35;
  }
  50% {
    transform: scale(1);
    opacity: 1;
  }
}
.ctaband__eyebrow {
  position: relative;
  margin: 0 0 8px;
  color: #ffd23f;
  font-family: "Courier New", monospace;
  font-weight: 700;
  font-size: clamp(10px, 2.4vw, 11px);
  line-height: 1;
  letter-spacing: 0.12em;
}

.ctaband__title {
  position: relative;
  margin: 0 0 20px;
  max-width: 22ch;
  color: #fff7e6;
  font-weight: 700;
  font-size: clamp(18px, 4.4vw, 24px);
  line-height: 1.3;
  font-family: inherit;
}

.ctaband__cta {
  position: relative;
  box-sizing: border-box;
  border: 1px solid #ffd23f;
  border-radius: 12px;
  background: rgba(255, 210, 63, 0.14);
  color: #ffd23f;
  padding: 12px 24px;
  font-weight: 700;
  font-size: clamp(12px, 2.8vw, 13px);
  line-height: 1;
  font-family: inherit;
  letter-spacing: 0.02em;
  animation: ctaGlitch 2s linear infinite;
}

@keyframes ctaGlitch {
  0%, 59%, 64%, 100% {
    transform: translateX(0);
    opacity: 1;
  }
  60% {
    transform: translateX(-1px);
    opacity: 0.85;
  }
  61% {
    transform: translateX(1px);
    opacity: 1;
  }
  62% {
    transform: translateX(-1px);
    opacity: 0.9;
  }
  63% {
    transform: translateX(0);
    opacity: 1;
  }
}
@media (prefers-reduced-motion: reduce) {
  .ctaband__scan, .ctaband__corner, .ctaband__cta {
    animation: none !important;
  }
  .ctaband__corner {
    transform: scale(1);
    opacity: 1;
  }
  .ctaband__cta {
    transform: translateX(0);
    opacity: 1;
  }
}