Css fixes, Tailwind forward

frontend/src/styles/tailwind.css

@@ -1,66 +1,7 @@
+
+/* Import minimal theme variables */
+@import './theme.css';
+
 @tailwind base;
 @tailwind components;
 @tailwind utilities;
-
-/* Custom component classes using Tailwind (with app- prefix to avoid Mantine conflicts) */
-@layer components {
-  .app-card {
-    @apply bg-bg-surface border border-border-subtle rounded-app-lg p-app-lg shadow-app-md;
-  }
-  
-  .app-surface {
-    @apply bg-bg-surface border border-border-subtle rounded-app-md shadow-app-sm;
-  }
-  
-  .app-raised {
-    @apply bg-bg-raised shadow-app-sm rounded-app-md;
-  }
-  
-  .app-interactive {
-    @apply cursor-pointer transition-all duration-200 hover:bg-hover-bg active:bg-active-bg;
-  }
-  
-  .app-file-drop-zone {
-    @apply border-2 border-dashed border-file-drop rounded-app-lg bg-bg-surface transition-all duration-200;
-  }
-  
-  .app-file-drop-zone:hover,
-  .app-file-drop-zone.drag-over {
-    @apply border-app-primary-500 bg-file-drop-hover;
-  }
-  
-  /* PDF-specific component classes */
-  .app-pdf-viewer-bg {
-    @apply bg-pdf-viewer;
-  }
-  
-  .app-pdf-toolbar {
-    @apply bg-pdf-toolbar border-b border-border-subtle;
-  }
-  
-  /* Button variants */
-  .app-btn-pdf-tool {
-    @apply bg-bg-surface border border-border-default text-text-primary px-app-md py-app-sm rounded-app-md font-medium transition-all duration-200 hover:bg-hover-bg hover:border-app-primary-500;
-  }
-  
-  /* Focus styles */
-  .app-focus-ring {
-    @apply focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-focus-ring focus-visible:ring-offset-2;
-  }
-}
-
-/* Custom utilities */
-@layer utilities {
-  .text-balance {
-    text-wrap: balance;
-  }
-  
-  .scrollbar-hide {
-    -ms-overflow-style: none;
-    scrollbar-width: none;
-  }
-  
-  .scrollbar-hide::-webkit-scrollbar {
-    display: none;
-  }
-}