html, body {
  margin: 0;
  overflow: hidden;
}

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #17141a;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.neon {
  margin: 0;
  font: 800 clamp(30px, 11vmin, 56px)/1 "Segoe UI", -apple-system, "Noto Sans KR", sans-serif;
  letter-spacing: 0.04em;
  color: #ffffff;
  text-shadow: 0 0 4px #ff2e63, 0 0 8px #ff2e63, 0 0 16px rgba(255, 46, 99, 0.8), 0 0 32px rgba(255, 46, 99, 0.6), 0 0 48px rgba(255, 46, 99, 0.35);
}

.stage.is-demo .neon {
  animation: flicker 2s linear infinite;
}

@keyframes flicker {
  0% {
    opacity: 1;
  }
  6% {
    opacity: 0.3;
  }
  14% {
    opacity: 1;
  }
  20% {
    opacity: 1;
  }
  26% {
    opacity: 0.4;
  }
  34% {
    opacity: 1;
  }
  50% {
    opacity: 1;
  }
  56% {
    opacity: 0.25;
  }
  64% {
    opacity: 1;
  }
  80% {
    opacity: 1;
  }
  86% {
    opacity: 0.35;
  }
  94% {
    opacity: 1;
  }
  100% {
    opacity: 1;
  }
}
@media (prefers-reduced-motion: reduce) {
  .stage.is-demo .neon {
    animation: none;
    opacity: 1;
  }
}