Transform webapp into Resume Branches - Git for CVs

Features:
- Complete CV version control system with branching and submission tracking
- Interactive tree visualization showing master resume, branches, and submissions
- Diff viewer for tracking changes between CV versions
- Professional landing page with Git for CVs messaging
- Modern dashboard with three-panel layout (tree, details, preview)
- ATS-safe design philosophy throughout
- Tailwind 4 configuration with professional design system

Components:
- CVTree: Interactive expandable tree for CV versions
- DiffViewer: Visual diff display with add/remove/change highlighting
- Comprehensive data models for documents, versions, patches, submissions
- Upload modal and action buttons for CV management
- Status tracking and public sharing indicators

Architecture:
- TypeScript types for complete CV management workflow
- Responsive design with proper hover states and animations
- Mock data demonstrating realistic ML Engineer and Backend Engineer branches
- Ready for FastAPI backend integration and DOCX processing

This implements the complete 'Resume Branches' vision as a modern webapp
that treats CV management like version control for documents.

apps/webapp/src/app/globals.css

@@ -8,19 +8,59 @@
 @theme inline {
   --color-background: var(--background);
   --color-foreground: var(--foreground);
-  --font-sans: var(--font-geist-sans);
-  --font-mono: var(--font-geist-mono);
+  --font-sans: Inter, system-ui, sans-serif;
+  --font-mono: Consolas, Monaco, monospace;
 }
 
 @media (prefers-color-scheme: dark) {
   :root {
-    --background: #0a0a0a;
-    --foreground: #ededed;
+    --background: #0f172a;
+    --foreground: #e2e8f0;
   }
 }
 
 body {
   background: var(--background);
   color: var(--foreground);
-  font-family: Arial, Helvetica, sans-serif;
+  font-family: var(--font-sans);
+}
+
+/* Custom scrollbar */
+::-webkit-scrollbar {
+  width: 6px;
+}
+
+::-webkit-scrollbar-track {
+  background: transparent;
+}
+
+::-webkit-scrollbar-thumb {
+  background: #cbd5e1;
+  border-radius: 3px;
+}
+
+::-webkit-scrollbar-thumb:hover {
+  background: #94a3b8;
+}
+
+/* Focus styles */
+.focus-ring {
+  @apply focus:outline-none focus:ring-2 focus:ring-blue-500 focus:ring-offset-2;
+}
+
+/* Component base styles */
+.card {
+  @apply bg-white dark:bg-gray-800 rounded-lg shadow-sm border border-gray-200 dark:border-gray-700;
+}
+
+.btn-primary {
+  @apply bg-blue-600 hover:bg-blue-700 text-white font-medium px-4 py-2 rounded-md transition-colors;
+}
+
+.btn-secondary {
+  @apply bg-gray-100 hover:bg-gray-200 text-gray-900 font-medium px-4 py-2 rounded-md transition-colors;
+}
+
+.btn-ghost {
+  @apply hover:bg-gray-100 dark:hover:bg-gray-800 text-gray-700 dark:text-gray-300 font-medium px-4 py-2 rounded-md transition-colors;
 }