/* ═══════════════════════════════════════════════════════════════
   SANDBOX — éditeur de position, palette de pièces
   ═══════════════════════════════════════════════════════════════ */

#game-controls, #sandbox-controls {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.sandbox-palette {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 3px;
}

.palette-piece {
  width: 100%;
  height: 32px;
  border: 2px solid var(--color-border);
  background: var(--color-surface-2);
  border-radius: var(--radius-sm);
  font-size: 22px;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  padding: 2px;
}

.palette-piece:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-glow);
  transform: scale(1.08);
}

.palette-piece.active {
  border-color: var(--color-primary);
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 0 12px rgba(74, 168, 124, 0.4);
}

.sandbox-turn-btn {
  flex: 1;
  padding: 6px 4px;
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.sandbox-turn-btn:hover {
  color: var(--color-text);
  border-color: var(--color-text-muted);
}

.sandbox-turn-btn.active {
  background: var(--color-accent);
  color: #1a1a1a;
  border-color: var(--color-accent);
}

.sandbox-tool-info {
  font-size: 12px;
  color: var(--color-text-muted);
  padding: 6px 0;
  min-height: 28px;
  display: flex;
  align-items: center;
}

.sandbox-validation {
  font-size: 12px;
  color: var(--color-text-muted);
  line-height: 1.5;
  padding: 4px 0;
}

.sandbox-validation.valid {
  color: var(--color-primary);
}

.sandbox-validation.invalid {
  color: var(--color-danger);
}

.board.sandbox-mode .square {
  cursor: pointer;
}

.board.sandbox-mode .square:hover {
  outline: 2px solid var(--color-primary);
  outline-offset: -2px;
}