1. Font consistency: add Noto Sans as fallback for both display and body
fonts so Greek characters render in the same visual weight as Latin
2. Category panel gradients: reduce top opacity 0.85 → 0.65 (20% less)
3. Mobile full-width: remove max-w cap on mobile; sm:max-w-[960px] on
desktop (2× wider than before); shadow only on sm+ breakpoint
4. Smaller Add button (h-9→h-8, text-13→12) and price (22px→18px)
5. More spacing between description and footer hairline (pt-3 mt-3)
6. Square hero image in product detail sheet (aspect-square instead of h-44)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>