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);
}

.mask {
  overflow: hidden;
  max-width: min(380px, 90vw);
}

.mask__text {
  margin: 0;
  font-weight: 800;
  font-size: clamp(26px, 8vw, 42px);
  line-height: 1.2;
  font-family: inherit;
  color: #fff7e6;
  text-align: center;
}

.mask__text .letter {
  display: inline-block;
  animation: mask-up 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite, letter-blur-in 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
  animation-delay: calc(var(--i) * 30ms + var(--n) * 70ms);
}

@keyframes mask-up {
  0%, 4% {
    transform: translateY(115%);
  }
  30%, 78% {
    transform: translateY(0);
  }
  96%, 100% {
    transform: translateY(115%);
  }
}
@keyframes letter-blur-in {
  0%, 4% {
    filter: blur(10px);
  }
  30%, 78% {
    filter: blur(0);
  }
  96%, 100% {
    filter: blur(10px);
  }
}
@media (prefers-reduced-motion: reduce) {
  .mask__text .letter {
    animation: none;
    transform: none;
    filter: none;
  }
}