Refine drifting effect to only apply to game lists
- Remove global card drifting that affected all cards
- Apply subtle left/right shifts only to game-item elements
- Create staggered tiling effect in games lists
- Alternating pattern with 4 variations for visual variety
- Keeps main cards (header, login, etc) centered and stable
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>