Fix font visibility: Add dark text colors for better contrast

- Add color: #212529 to bot messages to fix white-on-white text issue
- Add general chatbot text color rules for better visibility
- Ensure all message elements have proper dark text color

gradio_app.py

@@ -276,6 +276,15 @@ css = """
     border-radius: 12px !important;
     border: 1px solid #e0e0e0 !important;
     background-color: #fafafa !important;
+    color: #212529 !important;
+}
+
+/* Ensure all chatbot text has proper contrast */
+#chatbot .message, 
+#chatbot .bot-message,
+#chatbot .user-message,
+#chatbot div {
+    color: #212529 !important;
 }
 .message {
     padding: 12px 16px !important;
@@ -295,6 +304,7 @@ css = """
     border: 1px solid #e9ecef !important;
     margin-left: 0 !important;
     margin-right: auto !important;
+    color: #212529 !important;
 }
 /* Full width input area */
 .gr-textbox {