I have tried several methods to bring an html template to magento 2. One was to simply load style sheets from the template I was working on. The styles were mixed with the standard template, and the page was defaced. It was useless, but that was expected! In another attempt, I tried to use reset css techniques, with the hope of "zeroing" the style, and making my custom.css serve as a new style. It was useless. A third attempt was to search the documentation, to try to configure an XML page with full width, so theoretically I could fill it with html from my template, and have full width features. Documentation references were not the same as the platform screen, even using magento 2.3.5. Did not work! One last attempt was to try to find some standard file (within the theme I created), of the type "style.css". It was a cloned Luma theme. I didn't try to change the Vendor folder! However, pretty much all of the standard style sheets were .less, which I don't know how to work with, let alone knowing what the theme's pattern would be.
I would like to know how is the best way to 100% clone an html template for a magento 2 theme that I create!