Added @media(max-width:768px) breakpoints:
- 2-col grids → single column on mobile
- 3-col grids → single column
- 4-col model cards → 2-col
- Stats grid → 2-col
- Tables: horizontal scroll, smaller text
- Reduced padding and font sizes
- Hero title scales down
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>