Ok because right now for this container with the chatbot, I’ve noticed when I scroll down it goes beyond the container and shows some white space at the end. But I want the container to be the end of the page. This screenshot explains this random white space at the end.
I don’t know if you can get it perfect from CSS alone, but try working with .stMainBlockContainer. That’s where the padding at the bottom comes from. You can try removing the bottom padding there and maybe adding more padding to the chat interface container.