Critical bug fix (P0): Tailwind CSS classes were not being compiled.
Root Cause:
- Tailwind v4 requires explicit @import tailwindcss in CSS file
- File was missing this directive, causing all utility classes to be ignored
- CSS bundle was only 4KB instead of expected 30KB+
Fix:
- Added @import tailwindcss; at the top of src/index.css
- Verified build now generates 30KB+ CSS bundle with all utility classes
- Confirmed classes like text-3xl, bg-indigo-600, max-w-7xl are present
Safety First:
- Build passes successfully
- No breaking changes to existing styles
- Incremental fix before UI refactoring
Refs: Tailwind v4 migration guide
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