- Board height: calc(100vh - 180px) — uses full screen height
- Layout height: calc(100vh - 70px) with overflow hidden
- Removed max-width constraint, now aspect-ratio + height drive size
- Board dominates viewport instead of floating in a small box
- Large screens: max-height 750px
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>