Update app.py

app.py

@@ -176,19 +176,39 @@ elif mode == "Learning Analytics":
         col1,col2,col3,col4 = st.columns(4)
 
         with col1:
-            st.metric("🎯 Mastered", f"{mastered}/{total_idioms}")
+            st.metric(
+                label="🎯 Mastered <span title='Idioms you have answered correctly at least 80% of the time'>❓</span>",
+                value=f"{mastered}/{total_idioms}",
+                delta=None,
+                help=None,
+                delta_color="normal",
+                label_visibility="visible",
+                unsafe_allow_html=True
+            )
             st.progress(mastered/total_idioms)
 
         with col2:
-            st.metric("📚 Practiced", f"{practiced}/{total_idioms}")
+            st.metric(
+                label="📚 Practiced <span title='Idioms you have attempted at least once'>❓</span>",
+                value=f"{practiced}/{total_idioms}",
+                unsafe_allow_html=True
+            )
             st.progress(practiced/total_idioms)
 
         with col3:
-            st.metric("⚠️ Weak", weak)
+            st.metric(
+                label="⚠️ Weak <span title='Idioms with accuracy below 60%'>❓</span>",
+                value=weak,
+                unsafe_allow_html=True
+            )
             st.progress(weak/total_idioms)
-
+        
         with col4:
-            st.metric("🎯 Accuracy", f"{avg_acc*100:.1f}%")
+            st.metric(
+                label="🎯 Accuracy <span title='Your average correct rate across all attempted idioms'>❓</span>",
+                value=f"{avg_acc*100:.1f}%",
+                unsafe_allow_html=True
+            )
             st.progress(avg_acc)
 
         st.markdown("---")