Removed the following unused CSS variables that were leftovers from when
the project switched to the MUI theme system:
- --env-var-radius-1
- --env-var-width-1
- --env-var-width-3
- --env-var-height-1
- --env-var-spacing-3
- --env-var-spacing-4
- --env-var-spacing-5
- --env-var-img-width-1
- --env-var-img-width-2
- --env-var-img-width-3
- --env-var-default-1
- --env-var-default-2
- --env-var-shadow-1
These variables are not referenced anywhere in the codebase. The project
now uses MUI theme configuration (theme.spacing(), theme.palette.*)
instead of CSS variables for styling.
Kept 19 CSS variables that are still actively used during the migration
to pure MUI theme.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>