How can I move the input and button shifts down on when text is coming down

Question

I want to create a chatbot and I want that the input and send button go down so that the text and button do not overlap and it goes down here is my code.
https://code.sololearn.com/WEGMuLVUFg3i/?ref=app

Answer 1

Please tell

Answer 2

Just use CSS to add focus to it ok

Answer 3

Please can you elaborate. It will be very sweet of you. Thanks in advance