Update app.py

app.py

@@ -507,6 +507,19 @@ if st.session_state.app_step == "intro":
         "2) Click **Run Model** to compute metrics and plots. \n"
         "3) **Proceed to Validation** (with actual TOC) or **Proceed to Prediction** (no TOC)."
     )
+      st.subheader("Input Features Used by the Model")
+    st.markdown("""
+    The TOC estimation model uses the following eight well-logging features:
+
+    - **AHT90 (Average Hydrocarbon Tool 90° Phase)**
+    - **DT (Delta-T Sonic Travel Time)**
+    - **GR (Gamma Ray)**
+    - **K (Potassium)**
+    - **RHOB (Bulk Density)**
+    - **TNPH (Thermal Neutron Porosity)**
+    - **Th (Thorium)**
+    - **Ur (Uranium)**
+    """)
     if st.button("Start Showcase", type="primary"):
         st.session_state.app_step = "dev"; st.rerun()