Thank you for spending your precious time on my problem. @Arkshine @Lilly
I set your member level to 2. You can enter the chat area.
Yes, a few CSS codes were causing problems.
I edited it, but this time there was a space at the bottom of the chat area.
And the bottom code in the body:before code does not work.
I can’t fix this right now.
@Lilly If I understood what you wrote correctly, this is how I uploaded the photo.
By the way, I made this design with zero CSS knowledge. That’s why I may make many mistakes. Thanks to you, I am learning from my mistakes. 