Refactor styles to utilize Tailwind CSS utility classes for improved consistency and maintainability across forms, motion, shell, and vault components. Remove deprecated reduced-motion styles and consolidate motion-related animations. Update color tokens for better contrast and accessibility. Introduce a new Tailwind CSS configuration file.

webapp/src/main.tsx

@@ -1,6 +1,7 @@
 import { render } from 'preact';
 import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
 import App from './App';
+import './tailwind.css';
 import './styles.css';
 
 const queryClient = new QueryClient({