Update app.py

app.py

@@ -29,8 +29,7 @@ def pagina_principal():
     
     mensagens = st.session_state['mensagens']
 
-    st.markdown("<h2 style='text-align: center; margin-bottom: -100px; margin-top: -50px'>🤖 Chatbot</h2>", unsafe_allow_html=True)
-    st.write("---")
+    st.header('🤖 Chatbot', divider=True)
 
     for mensagem in mensagens:
         chat = st.chat_message(mensagem['role'])