- New custom favicon: blue gradient water drop with spray burst
(favicon.png 32/64/256px, favicon.webp, apple-touch-icon 180px)
- Mobile nav (768px): tighter padding (12px), smaller logo (1rem), smaller icon (1.2rem)
- Narrow phones (480px): logo text 0.85rem, logo max-width 60%
- Tiny phones (360px): logo text 0.75rem, logo max-width 55%
- CSS cache buster bumped to v3
