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

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #ffd23f;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.ss {
  display: grid;
  gap: 16px;
  justify-items: center;
}

.ss__hint {
  margin: 0;
  font-size: 13px;
  line-height: 1.5;
  text-align: center;
  max-width: 260px;
  color: rgba(23, 20, 26, 0.78);
}

.ss__scene {
  position: relative;
  perspective: 640px;
  padding: 24px;
}

.ss__btn {
  position: relative;
  border: 0;
  cursor: pointer;
  padding: 24px 48px;
  border-radius: 12px;
  background: #17141a;
  color: #fff7e6;
  font-size: 16px;
  font-weight: 700;
  transform-style: preserve-3d;
  box-shadow: 0 14px 24px rgba(23, 20, 26, 0.32);
  overflow: hidden;
  will-change: transform;
}

.ss__btn:focus-visible {
  outline: 2px solid #17141a;
  outline-offset: 3px;
}

.ss__sweep {
  position: absolute;
  inset: -58%;
  pointer-events: none;
}

.ss__glow {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  z-index: 0;
}

.ss__floor {
  position: absolute;
  left: 50%;
  bottom: 2px;
  width: clamp(150px, 58vw, 280px);
  height: clamp(48px, 18.6vw, 90px);
  margin-left: clamp(-140px, -29vw, -75px);
  border-radius: 50%;
  background: radial-gradient(closest-side, rgba(23, 20, 26, 0.92), rgba(23, 20, 26, 0) 72%);
  filter: blur(6px);
  pointer-events: none;
}

.ss__label {
  position: relative;
  z-index: 1;
}

@media (prefers-reduced-motion: reduce) {
  .ss__btn {
    transition: none;
  }
}