- Remove progress step indicators (Fill Essential Info, Select Car, Calculate Impact)
- Clean up interface by removing STEP badges from sections
- Improve mobile responsive design with better touch targets
- Fix JavaScript errors with safer element selectors
- Create collapsible Advanced Options and Calculated Parameters sections
- Position both sections above calculate button in responsive side-by-side layout
- Remove gear icon from Calculated Parameters for cleaner design
- Add mobile-first CSS with proper breakpoints and touch improvements
- Enhance form validation and field monitoring without visual step clutter
- Preserve tax-old.html as backup of previous tabbed interface
- Maintain all calculation functionality while streamlining user flow
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
