Fix Downloads card to have proper light background

- Applied full card styling to .gr-group.card instead of transparent
- Added light background (#fafafa) to match other cards
- Removed styling from inner container to prevent conflicts
- Maintains proper card structure with header and content areas

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

app.py

@@ -215,10 +215,20 @@ with gr.Blocks(
         box-shadow: none !important;
         padding: 0 !important;
     }
-    /* Ensure gr.Group with card class has no extra styling */
+    /* Ensure gr.Group with card class looks like a proper card */
     .gr-group.card {
-        border: none !important;
+        background: #fafafa !important;
+        border-radius: 12px !important;
+        box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06) !important;
+        border: 1px solid #e5e7eb !important;
+        margin-bottom: 1.5rem !important;
+        overflow: hidden !important;
+        padding: 0 !important;
+    }
+    /* Remove inner container styling */
+    .gr-group.card > div:first-child {
         background: transparent !important;
+        border: none !important;
         padding: 0 !important;
     }
     /* Style download buttons like MobileNet's example buttons */