Enhance Visual Design with Modern Gradient Backgrounds

Objective:
Replace the current plain black background with modern, colorful gradients to make the game more visually appealing.

Proposed Changes
Replace solid black canvas background with dark gradient (navy to deep blue)
Add animated gradient background for the main page
Implement glassmorphism effects for UI elements

Canvas will have gradient background instead of solid black
Main page background is animated gradient
UI elements use glassmorphism styling
Game remains fully playable with good visibility

Please assign me this task.
I'd love to take this up and work on implementing these visual improvements.