I'll create a mobile-first Blackjack card game app with betting functionality. This will include a complete game interface with cards, betting system, and all the classic Blackjack actions.

I've created a complete mobile-first Blackjack card game app with the following features:

Key Features:

• Full Blackjack Gameplay: Hit, Stand, Double Down options
• Betting System: Multiple bet amounts ($10, $25, $50, $100)
• Money Management: Starting with $1000, track winnings/losses
• Card Visualization: Realistic playing cards with suits and ranks
• Dealer Logic: Proper dealer AI that hits on 16, stands on 17
• Game States: Betting, playing, dealer turn, and game over phases

Mobile-First Design:

• Touch-Friendly Buttons: Large, easy-to-tap buttons
• Responsive Layout: Optimized for mobile screens
• Clear Visual Hierarchy: Easy to read scores and game state
• Flexible Card Layout: Cards wrap properly on smaller screens
• Green Felt Background: Classic casino table appearance

Game Rules Implemented:

• Standard Blackjack scoring (Aces count as 1 or 11)
• Dealer reveals hidden card when player stands
• Blackjack (21 with first 2 cards) wins immediately
• Bust detection for both player and dealer
• Push (tie) handling
• Double down option available with first 2 cards

The app is fully functional and ready to play! Players can place bets, play multiple rounds, and track their money over time. The interface is optimized for mobile devices with large, touch-friendly controls and clear visual feedback.