/* ===== Build the Number - Grid Canvas ===== */

.canvas-stage {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin: 16px 0;
  padding: 12px;
}

.build-grid {
  display: inline-grid;
  gap: 4px;
  padding: 12px;
  border: 2px solid rgba(0, 0, 0, 0.08);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.5);
}

.grid-cell {
  border-radius: 8px;
  border: 2px dashed #ccc;
  background: rgba(0, 0, 0, 0.03);
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.1s ease;
}

.grid-cell:hover {
  border-color: #aaa;
  background: rgba(0, 0, 0, 0.06);
  transform: scale(1.04);
}

.grid-cell:active {
  transform: scale(0.95);
}

.grid-cell--filled {
  border: 2px solid rgba(255, 255, 255, 0.5);
  box-shadow: inset 0 -3px 0 rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.1);
  animation: pop-in 0.2s ease;
  cursor: pointer;
}

.grid-cell--filled:hover {
  opacity: 0.85;
  transform: scale(1.04);
}

/* Locked state after checking */
.grid-cell--locked {
  cursor: default;
  pointer-events: none;
}

.build-controls {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-top: 12px;
}

.done-btn {
  font-size: 1.4rem;
  padding: 12px 40px;
}

.clear-btn {
  font-size: 1.1rem;
  padding: 10px 24px;
  background: #eee;
  color: var(--text-dark);
}

.clear-btn:hover {
  background: #ddd;
}

.shape-label {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--btn-primary);
  text-align: center;
  min-height: 28px;
  margin-top: 8px;
}

@media (max-width: 480px) {
  .build-grid {
    padding: 8px;
    gap: 3px;
  }

  .done-btn {
    padding: 10px 28px;
    font-size: 1.2rem;
  }
}

.intro-tooltip {
  background: white;
  border: 2px solid var(--btn-primary);
  border-radius: 12px;
  padding: 12px 20px;
  font-size: 1.1rem;
  color: var(--text-dark);
  animation: fade-in 0.4s ease;
  margin-bottom: 12px;
  text-align: center;
  box-shadow: 0 4px 16px rgba(0,0,0,0.1);
}