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);
}

.board {
  width: min(400px, 92vw);
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: 16px;
}

.col__head {
  margin: 0 0 8px;
  font-family: ui-monospace, "Cascadia Mono", Consolas, monospace;
  font-size: clamp(12px, 2.8vw, 15px);
  font-weight: 700;
  color: #17141a;
  text-align: center;
}

.col__rows {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  row-gap: 8px;
}

.pill, .slot {
  border-radius: 12px;
  min-height: clamp(24px, 8vw, 34px);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: ui-monospace, "Cascadia Mono", Consolas, monospace;
  font-size: clamp(9.5px, 2.3vw, 13px);
  font-weight: 700;
}

.pill {
  background: #17141a;
  color: #ffd23f;
  box-shadow: 0 6px 12px rgba(23, 20, 26, 0.32);
}

.pill--en {
  background: #fff7e6;
  color: #17141a;
}

.slot {
  position: relative;
  border: 2px dashed rgba(194, 54, 26, 0.65);
}

.slot__badge {
  border-radius: 999px;
  background: #c2361a;
  color: #fff;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  font-size: clamp(10px, 2.4vw, 13px);
  font-weight: 800;
  padding: 4px 8px;
}

.stage.is-demo .pill {
  animation: fill-in 2s cubic-bezier(0.2, 1.4, 0.4, 1) infinite;
  animation-delay: calc(var(--i) * 0.16s);
}

.stage.is-demo .pill--en {
  animation-delay: calc(var(--i) * 0.16s + 0.24s);
}

.stage.is-demo .slot {
  animation: slot-alarm 2s ease-out infinite;
  animation-delay: calc(var(--i) * 0.16s + 0.24s);
}

.stage.is-demo .slot__badge {
  animation: badge-pop 2s cubic-bezier(0.2, 1.4, 0.4, 1) infinite;
  animation-delay: calc(var(--i) * 0.16s + 0.3s);
}

@keyframes fill-in {
  0% {
    transform: scale(0);
    opacity: 0;
  }
  9% {
    transform: scale(1.12);
    opacity: 1;
  }
  14%, 92% {
    transform: scale(1);
    opacity: 1;
  }
  100% {
    transform: scale(0.7);
    opacity: 0;
  }
}
@keyframes slot-alarm {
  0%, 12% {
    background: transparent;
  }
  20% {
    background: rgba(194, 54, 26, 0.28);
  }
  28% {
    background: rgba(194, 54, 26, 0.08);
  }
  36% {
    background: rgba(194, 54, 26, 0.28);
  }
  44%, 96% {
    background: rgba(194, 54, 26, 0.2);
  }
  100% {
    background: transparent;
  }
}
@keyframes badge-pop {
  0%, 12% {
    transform: scale(0) rotate(0deg);
    opacity: 0;
  }
  20% {
    transform: scale(1.25) rotate(0deg);
    opacity: 1;
  }
  26% {
    transform: scale(1) rotate(0deg);
  }
  36% {
    transform: scale(1) rotate(8deg);
  }
  44% {
    transform: scale(1) rotate(-8deg);
  }
  52% {
    transform: scale(1) rotate(4deg);
  }
  58%, 94% {
    transform: scale(1) rotate(0deg);
    opacity: 1;
  }
  100% {
    transform: scale(0.5);
    opacity: 0;
  }
}
@media (prefers-reduced-motion: reduce) {
  .stage.is-demo .pill,
  .stage.is-demo .slot,
  .stage.is-demo .slot__badge {
    animation: none;
  }
  .slot {
    background: rgba(194, 54, 26, 0.2);
  }
}