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);
}

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

.sl__badge {
  margin: 0;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(23, 20, 26, 0.12);
  color: #17141a;
  font-weight: 700;
  font-size: 11px;
  font-variant-numeric: tabular-nums;
}

.sl__scene {
  position: relative;
  padding: 40px;
  --tone-p: 0;
}

.sl__scene::before {
  content: "";
  position: absolute;
  inset: 0;
  margin: auto;
  width: 220px;
  height: 140px;
  border-radius: 12px;
  background: radial-gradient(circle, rgba(10, 79, 232, 0.4), transparent 70%);
  transform: scale(calc(0.55 + var(--tone-p) * 0.7));
  opacity: var(--tone-p);
  pointer-events: none;
  z-index: 0;
}

.sl__btn {
  position: relative;
  z-index: 1;
  border: 0;
  cursor: pointer;
  padding: 16px 32px;
  border-radius: 12px;
  background: #17141a;
  color: #fff7e6;
  font-size: 16px;
  font-weight: 700;
  transform-origin: center;
  will-change: transform, box-shadow;
}

.sl__btn:focus-visible {
  outline: 2px solid #fff7e6;
  outline-offset: 3px;
}

@media (max-width: 340px) {
  .sl__scene {
    padding: 24px;
  }
  .sl__btn {
    padding: 12px 24px;
    font-size: 14px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .sl__btn {
    transition: none;
  }
}