fix: remove custom CSS, centralize prose styling in tailwind config

- Remove custom CSS <style> tags from docs template (violates guidelines)
- Move prose typography customization to tailwind.config.ts
- Use theme tokens for all colors (adjustable with theme)
- Set code blocks to background.secondary (darker than primary)
- Remove duplicate inline typography config from both templates
- Now uses single source of truth for documentation styling

tailwind.config.ts

@@ -27,7 +27,33 @@ const config: Config = {
         'text-secondary': '#565f89',
         'accent': '#7aa2f7',
         'border': '#414868',
-      }
+      },
+      typography: ({ theme }) => ({
+        invert: {
+          css: {
+            '--tw-prose-pre-bg': theme('colors.background.secondary'),
+            code: {
+              backgroundColor: theme('colors.background.primary'),
+              color: theme('colors.text.primary'),
+              fontWeight: '400',
+            },
+            'code::before': {
+              content: '""',
+            },
+            'code::after': {
+              content: '""',
+            },
+            'pre code': {
+              backgroundColor: 'transparent',
+              color: 'inherit',
+            },
+            pre: {
+              backgroundColor: theme('colors.background.secondary'),
+              color: theme('colors.text.primary'),
+            },
+          },
+        },
+      }),
     }
   },
   plugins: [