We need to see your actual HTML code in order to see what you have at the top of it. To display your code in here you need to wrap it in triple back ticks. On a line by itself type three back ticks. Then on the first line below the three back ticks paste in your code. Then below your code on a new line type three more back ticks. The back tick on my keyboard is in the upper left just above the Tab key and below the Esc key.
You’ve got some minor issues in your CSS, I’m not sure it’s anything that would be causing this problem. I don’t think we have all the information we need to help you fix this. The best thing to do would be to put everything into github so we can download all of your files onto our own computer and try it for ourselves.
If that is the content of your css file, you have a big issue: you can’t put html tags in there
I’ve edited your post for readability. When you enter a code block into a forum post, please precede it with a separate line of three backticks and follow it with a separate line of three backticks to make it easier to read.
You can also use the “preformatted text” tool in the editor (</>) to add backticks around text.