Update README styling section to match the SCSS Modules convention

Was still describing Tailwind, which was removed from the project.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

README.md

@@ -23,16 +23,10 @@ npm run build
 
 ## Styling
 
-This project uses [Tailwind CSS](https://tailwindcss.com/) for styling.
-
-### Removing Tailwind CSS
-
-If you prefer not to use Tailwind CSS:
-
-1. Remove the demo pages in `src/routes/demo/`
-2. Replace the Tailwind import in `src/styles.css` with your own styles
-3. Remove `tailwindcss()` from the plugins array in `vite.config.ts`
-4. Remove `@tailwindcss/vite` and `tailwindcss` from `package.json`
+This project uses SCSS Modules. Every component that needs styles gets a
+co-located `Component.module.scss` next to `Component.tsx`; shared tokens
+(colors, spacing, breakpoints) live in `src/styles/_variables.scss`. See
+`CLAUDE.md` for the full styling conventions.
 
 ## Linting & Formatting