Update app.py

app.py

@@ -100,6 +100,21 @@ def clear_callback():
     st.session_state["output"] = ""
 
 
+st.markdown(
+    """<style>
+.css-ocqkz7 > div:nth-child(4) button {
+    background-color: #A0A0A0;
+}
+.css-ocqkz7 > div:nth-child(4) button:hover {
+    color: #FF6961;
+}
+.css-ocqkz7 > div:nth-child(4) button:active {
+    background-color: #FAA0A0;
+    color: #FF6961;
+}
+</style>""",
+    unsafe_allow_html=True,
+)
 col1, col2, col3, col4 = st.columns([1, 1, 1, 1])
 with col1:
     st.button("Demo: immunology", on_click=demo_immunology_callback)