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);
}

.cta {
  box-sizing: border-box;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
  width: clamp(260px, 90vw, 420px);
  padding: 24px 16px;
  border: 3px solid #17141a;
  border-radius: 0;
  background: #17141a;
  box-shadow: 8px 8px 0 #17141a;
}

.cta__stripes {
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image: repeating-linear-gradient(45deg, #17141a 0 24px, #ffd23f 24px 48px);
  animation: marchStripes 2s linear infinite;
}

.cta__title {
  position: relative;
  z-index: 1;
  margin: 0;
  max-width: 80%;
  color: #fff7e6;
  font-weight: 900;
  font-size: clamp(18px, 4.6vw, 24px);
  line-height: 1.15;
}

.cta__btn {
  box-sizing: border-box;
  position: relative;
  z-index: 1;
  border: 3px solid #17141a;
  border-radius: 999px;
  background: #ffd23f;
  color: #17141a;
  padding: 8px 24px;
  font-weight: 800;
  font-size: clamp(12px, 2.8vw, 14px);
  box-shadow: 4px 4px 0 #fff7e6;
}

@keyframes marchStripes {
  from {
    background-position: 0 0;
  }
  to {
    background-position: -96px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .cta__stripes {
    animation: none !important;
    background-position: 0 0;
  }
}