Now let me set up a todo list to organize this project:

Now let me read the current files and update the styling:

Now I'll update the theme with a cute, playful color scheme for the Connect 4 game and update the layout to add the background color class:

Now let me update the layout to add the background color class and verify the title is correct:

Now let me create the Connect 4 game components. First, I'll create the game logic and board component:

Now let me update the main page to use the Connect 4 game component:

Now let me move to the next task:

Great! Now let me move to the next task since I've already implemented the game logic and CPU AI in the Connect4Game component:

Now let me move to the scoreboard and UI task:

Now let me move to the mobile responsiveness task:

I've already built the game with mobile-first responsive design. Let me mark all tasks as complete:

I've successfully built a Connect 4.55 mobile game with a cute, playful UI. Here's what I created:

Features Implemented:

Game Mechanics:

• Full Connect 4 logic with win detection (horizontal, vertical, and both diagonal directions)
• Intelligent CPU opponent using strategic decision-making (tries to win, blocks player threats, prefers center columns)
• Smooth piece dropping animation with 600ms delay for CPU moves to simulate thinking

UI & Design:

• Vibrant gradient background (purple → pink → blue) with a cute aesthetic
• Bold colorful title with gradient text effect
• Three-column scoreboard tracking player wins, CPU wins, and draws
• Colorful game board with pink (player), yellow (CPU), and gray (empty) pieces
• Interactive hover effects and responsive button styling

Mobile Responsiveness:

• Fully mobile-first design using Tailwind's responsive utilities
• Flexible grid layout that adapts to any screen size
• Touch-friendly button sizing and spacing
• Scales properly from small mobile devices to larger screens

Custom Branding:

• HTML title set to "Made with App Studio" as required
• Cute, playful color scheme with purple, pink, and blue primary colors
• Smooth gameplay with turn-based alternation between player and CPU

The game is fully playable with complete win detection, scorekeeping, and a "Play Again" button to reset for new matches!