Update app.py

app.py

@@ -155,7 +155,7 @@ st.markdown("""
 /* User message styling */
 .user-message {
     background: #3b82f6;
-    color: white;
+    color: black;
     padding: 0.75rem 1rem;
     border-radius: 7px;
     max-width: 95%;