Update app.py

app.py

@@ -4,7 +4,6 @@ import os
 import json
 from dotenv import load_dotenv
 import logging
-from dotenv import load_dotenv
 from requests.adapters import HTTPAdapter
 from requests.packages.urllib3.util.retry import Retry
 
@@ -110,3 +109,37 @@ with chat_container.container():
     for i in range(len(st.session_state['generated'])):
         st.write(f"**User:** {st.session_state['past'][i]}")
         st.write(f"**Bot:** {st.session_state['generated'][i]}")
+
+# Alternar entre modo claro y oscuro
+if 'dark_mode' not in st.session_state:
+    st.session_state['dark_mode'] = False
+
+def toggle_dark_mode():
+    st.session_state['dark_mode'] = not st.session_state['dark_mode']
+
+st.sidebar.button("Toggle Dark Mode", on_click=toggle_dark_mode)
+
+if st.session_state['dark_mode']:
+    st.markdown(
+        """
+        <style>
+        .main {
+            background-color: #333;
+            color: #fff;
+        }
+        </style>
+        """,
+        unsafe_allow_html=True
+    )
+else:
+    st.markdown(
+        """
+        <style>
+        .main {
+            background-color: #fff;
+            color: #000;
+        }
+        </style>
+        """,
+        unsafe_allow_html=True
+    )