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);
}

.lb-btn {
  position: relative;
  overflow: hidden;
  box-sizing: border-box;
  padding: 12px 32px;
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.16);
  backdrop-filter: blur(12px) saturate(160%);
  -webkit-backdrop-filter: blur(12px) saturate(160%);
  box-shadow: 0 6px 12px rgba(23, 20, 26, 0.32);
  color: #17141a;
  font: 700 14px/1 -apple-system, "Segoe UI", sans-serif;
  cursor: pointer;
}

.lb-btn__label {
  position: relative;
  z-index: 1;
}

.lb-btn::before {
  content: "";
  position: absolute;
  top: -20%;
  left: -40%;
  width: 40%;
  height: 140%;
  background: linear-gradient(100deg, transparent, #fff7e6, transparent);
  opacity: 0.8;
  transform: translateX(-40%) skewX(-18deg);
  transition: transform 600ms ease-out;
}

.lb-focal:hover::before {
  transform: translateX(340%) skewX(-18deg);
}

@keyframes lb-sweep {
  0%, 20% {
    transform: translateX(-40%) skewX(-18deg);
  }
  60%, 100% {
    transform: translateX(340%) skewX(-18deg);
  }
}
.lb-btn.is-demo::before {
  animation: lb-sweep 2s ease-out infinite;
}

@media (prefers-reduced-motion: reduce) {
  .lb-focal:hover::before,
  .lb-btn.is-demo::before {
    animation: none !important;
    transition: none !important;
    transform: translateX(-40%) skewX(-18deg) !important;
  }
}