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

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.stepper {
  display: flex;
  align-items: stretch;
  gap: 8px;
  background: #fff7e6;
  border-radius: 999px;
  padding: 8px;
  box-shadow: 0 14px 24px rgba(23, 20, 26, 0.32);
}
.stepper__btn {
  box-sizing: border-box;
  width: 40px;
  border: 0;
  border-radius: 50%;
  background: #fff;
  color: #17141a;
  font-size: 20px;
  font-weight: 700;
  line-height: 1;
  font-family: inherit;
  cursor: pointer;
  transition: transform 140ms ease-out, opacity 140ms ease-out;
}
.stepper__btn:active:not(:disabled) {
  transform: scale(0.9);
}
.stepper__btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}
.stepper__btn:focus-visible {
  outline: 2px solid #2f6df6;
  outline-offset: 2px;
}
.stepper__value {
  box-sizing: border-box;
  width: 52px;
  border: 0;
  background: transparent;
  text-align: center;
  font-weight: 800;
  font-size: clamp(16px, 4.6vw, 19px);
  font-family: inherit;
  color: #17141a;
}
.stepper__value:focus {
  outline: none;
}

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