docs: add breakpoints

README.md

@@ -73,3 +73,13 @@ bun run preview
 ```
 
 Check out the [deployment documentation](https://nuxt.com/docs/getting-started/deployment) for more information.
+
+#### Breakpoints
+
+```css
+--breakpoint-sm: 640px;
+--breakpoint-md: 768px;
+--breakpoint-lg: 1024px;
+--breakpoint-xl: 1280px;
+--breakpoint-2xl: 1536px;
+```