Update app.py

app.py

@@ -123,7 +123,14 @@ def predict_sentiment(text):
 
 if st.button("Submit"):
     if Message.strip()=="":
-        st.write("Plese enther Message")
+        st.markdown(
+                """
+                <div style='background-color: #f8d7da; padding: 10px; border-radius: 5px;'>
+                    <h4 style='color: #721c24;'> ⚠️ Plese enther Message📩 </h4>
+                </div>
+                """,
+                unsafe_allow_html=True
+            )
     else:
         Message = preprocess_text(Message)
         result = predict_sentiment(Message)