Looking for SEO Compatible HTML Theme

Hello, I am looking for an up-to-date html theme that is fully seo compatible, bootstrap if possible. The primary feature I am looking for is that many form elements are ready, and secondly, a structure where fine details such as text enlargement are considered on the blog page. Do you know of any such theme that you use? I would like to point out that I am not looking for a wordpress theme, I am looking for html.

Hello, if you don't mind me asking, did you find it? And if you can, could you recommend a free one? I would appreciate it!