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

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #17141a;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.kb {
  --c1: #a6b4d3;
  --c2: #d3a6c8;
  --c3: #a6d3b1;
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 100%;
  max-width: 420px;
}

.kb__hint {
  margin: 0;
  font-weight: 700;
  font-size: clamp(10px, 2.8vw, 12px);
  line-height: 1.35;
  color: #fff7e6;
}

.kb__row {
  display: flex;
  gap: 8px;
  align-items: stretch;
}

.kb__field {
  position: relative;
  overflow: hidden;
  flex: 0 0 auto;
  width: clamp(176px, 46vw, 232px);
  height: clamp(176px, 46vw, 232px);
  border-radius: 16px;
  background: rgba(255, 247, 230, 0.04);
  box-shadow: inset 0 0 0 1px rgba(255, 247, 230, 0.14);
  cursor: crosshair;
  touch-action: none;
}

.kb__field:focus-visible {
  outline: 2px solid #6ec8ff;
  outline-offset: 2px;
}

.kb__cv {
  display: block;
  width: 100%;
  height: 100%;
}

.kb__side {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-top: 4px;
}

.kb__num {
  font-weight: 800;
  font-size: clamp(20px, 6vw, 30px);
  line-height: 1;
  color: #ffd23f;
  font-variant-numeric: tabular-nums;
}

.kb__unit {
  font-weight: 600;
  font-size: clamp(9px, 2.4vw, 11px);
  line-height: 1.4;
  color: rgba(255, 247, 230, 0.82);
}

.kb__meta {
  margin: 4px 0 0;
  font-size: clamp(9px, 2.4vw, 11px);
  line-height: 1.5;
  color: rgba(255, 247, 230, 0.82);
}

.kb__meta b {
  font-weight: 700;
  color: #ffd23f;
  font-variant-numeric: tabular-nums;
  margin-right: 4px;
}

.kb__metaUnit {
  color: rgba(255, 247, 230, 0.72);
}

@media (max-width: 340px) {
  .kb {
    gap: 4px;
  }
  .kb__field {
    width: 150px;
    height: 150px;
  }
  .kb__num {
    font-size: 16px;
  }
  .kb__meta {
    margin-top: 0;
    font-size: 8px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .kb.is-still .kb__field {
    cursor: default !important;
  }
}