Update app.py

app.py

@@ -1,14 +1,30 @@
 import streamlit as st
 from datetime import date
 
+# Configure the page
 st.set_page_config(page_title="Age Calculator", layout="centered")
+
+# Title and intro
 st.title("🎂 Age Calculator")
-st.subheader("Calculate your age from your date of birth")
+st.subheader("Calculate your age from your date of birth (starting from 1950)")
+
+# Set min and max date
+min_dob = date(1950, 1, 1)
+max_dob = date.today()
+
+# Date input with restriction
+dob = st.date_input("📅 Select your Date of Birth", min_value=min_dob, max_value=max_dob, value=date(2000, 1, 1))
 
-dob = st.date_input("📅 Select your Date of Birth", value=date(2000, 1, 1))
-calculate = st.button("🔢 Calculate Age")
-clear = st.button("🗑️ Clear")
+# Buttons
+col1, col2, col3 = st.columns(3)
+with col1:
+    calculate = st.button("🔢 Calculate Age")
+with col2:
+    clear = st.button("🗑️ Clear")
+with col3:
+    exit_btn = st.button("❌ Exit")
 
+# Logic
 if calculate:
     today = date.today()
     age_years = today.year - dob.year - ((today.month, today.day) < (dob.month, dob.day))
@@ -16,3 +32,11 @@ if calculate:
 
 if clear:
     st.experimental_rerun()
+
+if exit_btn:
+    st.warning("App exited.")
+    st.stop()
+
+# Footer
+st.markdown("---")
+st.caption("Built with ❤️ using Streamlit")