Update app.py

app.py

@@ -224,7 +224,7 @@ fallback_chain = LLMChain(llm=llm, prompt=fallback_prompt)
 
 chat_container = st.container()
 
-with st.form(key='query_form'):
+with st.form(key='query_form', clear_on_submit=True):
     query = st.text_input("Ask your question:", value="", help=None)
     st.markdown(
         """
@@ -235,6 +235,15 @@ with st.form(key='query_form'):
         .stButton button {
             color: red !important;
         }
+        .stButton button:hover {
+            color: red !important;
+        }
+        .stButton button:active {
+            color: red !important;
+        }
+        .stButton button:focus {
+            color: red !important;
+        }
         </style>
         """, 
         unsafe_allow_html=True