Update app.py

app.py

@@ -151,14 +151,15 @@ st.write("📂 **Vector Store Created:**", st.session_state.vector_created)
 
 
 # ----------------- Query Input -----------------
-query = None  
+query = None 
 
-# Show input box ONLY when processing is fully done
-if st.session_state.pdf_loaded and st.session_state.chunked and st.session_state.vector_created:
-    query = st.text_input("🔍 Ask a question about the document:")
+# Notify user if no PDF is provided in an aesthetic manner
+if not st.session_state.pdf_path:
+    st.warning("⚠️ **No PDF detected!** Please enter a valid URL or upload a PDF file to proceed.", icon="⚠️")
     
-elif not st.session_state.pdf_path:
-    st.info("⬆️ Please upload or provide a PDF URL first.")  # Show only if no PDF is provided
+# Show input box ONLY when processing is fully complete
+elif st.session_state.pdf_loaded and st.session_state.chunked and st.session_state.vector_created:
+    query = st.text_input("🔍 Ask a question about the document:")
     
 if query:
     with st.spinner("🔄 Retrieving relevant context..."):