', unsafe_allow_html=True)
+
+ # Route to appropriate page
+ current_page = st.session_state.current_page
+
+ if current_page == 'home':
+ show_home_page()
+ elif current_page == 'ai_calculator':
+ show_ai_calculator()
+ elif current_page == 'goals':
+ show_goals_page()
+ elif current_page == 'settings':
+ show_settings_page()
+ else:
+ show_home_page()
+
+ st.markdown('
', unsafe_allow_html=True)
+
+ # Handle navigation
+ handle_navigation()
+
+ # Show bottom navigation
+ st.markdown(show_bottom_navigation(), unsafe_allow_html=True)
+
+if __name__ == "__main__":
+ main()
\ No newline at end of file
diff --git a/auth.py b/auth.py
new file mode 100644
index 0000000..fd3c9f8
--- /dev/null
+++ b/auth.py
@@ -0,0 +1,134 @@
+import streamlit as st
+from database import db_manager
+import re
+
+def validate_email(email):
+ """Validate email format"""
+ pattern = r'^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$'
+ return re.match(pattern, email) is not None
+
+def validate_password(password):
+ """Validate password strength"""
+ if len(password) < 6:
+ return False, "Password must be at least 6 characters long"
+ return True, "Password is valid"
+
+def show_auth_page():
+ """Show authentication page (login/signup)"""
+
+ st.markdown("""
+
+ """, unsafe_allow_html=True)
+
+ # Center the authentication form
+ col1, col2, col3 = st.columns([1, 2, 1])
+
+ with col2:
+ st.markdown('', unsafe_allow_html=True)
+
+ # Logo and title
+ st.markdown("""
+
+
đŊī¸ AI Calories Tracker
+
Track your nutrition with AI-powered analysis
+
+ """, unsafe_allow_html=True)
+
+ # Toggle between login and signup
+ auth_mode = st.radio("", ["Login", "Sign Up"], horizontal=True)
+
+ if auth_mode == "Login":
+ show_login_form()
+ else:
+ show_signup_form()
+
+ st.markdown('