⭐ Star Battle

Goal: Place exactly 1 star ⭐ in each row, each column, and each colored region.

• Stars cannot be adjacent to each other — not even diagonally.
• Click once = ❌ mark (star can't go here).
• Click again = ⭐ place a star.
• Click again = clear the cell.

Red highlights show rule violations in real-time.