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);
}

.sg {
  --p: 0;
  box-sizing: border-box;
  width: clamp(224px, 78vw, 320px);
  display: grid;
  gap: 12px;
  padding: clamp(12px, 3vw, 16px);
  border: 1px solid rgba(23, 20, 26, 0.1);
  border-radius: 16px;
  background: #ffffff;
  box-shadow: 0 2px 8px rgba(23, 20, 26, 0.1);
  color: #17141a;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
}

.sg__bar {
  height: 4px;
  border-radius: 999px;
  background: rgba(23, 20, 26, 0.08);
  overflow: hidden;
}

.sg__fill {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: #2f6df6;
  transform: scaleX(var(--p));
  transform-origin: left;
  transition: transform 220ms ease-out;
}

.sg__box {
  height: clamp(96px, 30vh, 132px);
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  border-radius: 8px;
  background: rgba(23, 20, 26, 0.03);
  padding: 8px;
}

.sg__track {
  display: grid;
  gap: 8px;
}

.sg__track p {
  margin: 0;
  font-size: clamp(10px, 2.6vw, 12px);
  line-height: 1.5;
  color: rgba(23, 20, 26, 0.72);
  word-break: keep-all;
  overflow-wrap: anywhere;
}

.sg__btn {
  position: relative;
  overflow: hidden;
  border: 0;
  border-radius: 12px;
  background: rgba(23, 20, 26, 0.06);
  padding: 8px 16px;
  font-family: inherit;
  font-size: clamp(11px, 2.8vw, 12px);
  font-weight: 700;
  cursor: not-allowed;
}

.sg__btn:focus-visible {
  outline: 2px solid #2f6df6;
  outline-offset: 2px;
}

.sg__face--off {
  display: block;
  color: rgba(23, 20, 26, 0.4);
}

.sg__face--on {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  border-radius: inherit;
  background: #0a4fe8;
  color: #fff7e6;
  opacity: 0;
  transition: opacity 220ms ease-out;
}

.sg.is-ready .sg__btn {
  cursor: pointer;
}

.sg.is-ready .sg__face--on {
  opacity: 1;
}

.sg.is-ready .sg__btn {
  animation: sg-pop 300ms cubic-bezier(0.2, 1.4, 0.4, 1) 1;
}

.sg.is-demo .sg__track {
  animation: sg-roll 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

.sg.is-demo .sg__fill {
  animation: sg-fill 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

.sg.is-demo .sg__face--on {
  animation: sg-on 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

.sg.is-demo .sg__btn {
  animation: sg-beat 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

@keyframes sg-roll {
  0% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-40%);
  }
  100% {
    transform: translateY(0);
  }
}
@keyframes sg-fill {
  0% {
    transform: scaleX(0);
  }
  50% {
    transform: scaleX(1);
  }
  100% {
    transform: scaleX(0);
  }
}
@keyframes sg-on {
  0% {
    opacity: 0;
  }
  40% {
    opacity: 0;
  }
  52% {
    opacity: 1;
  }
  72% {
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}
@keyframes sg-beat {
  0% {
    transform: scale(1);
  }
  44% {
    transform: scale(1);
  }
  52% {
    transform: scale(1.04);
  }
  62% {
    transform: scale(1);
  }
  100% {
    transform: scale(1);
  }
}
@keyframes sg-pop {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.04);
  }
  100% {
    transform: scale(1);
  }
}
@media (max-width: 340px) {
  .sg {
    gap: 8px;
    width: 88vw;
    padding: 8px;
  }
  .sg__box {
    height: 76px;
  }
  .sg__btn {
    padding: 8px 12px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .sg.is-demo .sg__track,
  .sg.is-demo .sg__fill,
  .sg.is-demo .sg__face--on,
  .sg.is-demo .sg__btn,
  .sg.is-ready .sg__btn {
    animation: none !important;
  }
  .sg.is-demo .sg__fill {
    transform: scaleX(1);
  }
  .sg.is-demo .sg__face--on {
    opacity: 1;
  }
  .sg__fill, .sg__face--on {
    transition: none;
  }
}