here is a website that teaches u how to do mobile web like it's 2003
https://www.developershome.com/member when u didn't need a supercomputer to render a websight and it was meant to target any "user agent" and a 0.1MB available RAM 80x60px display nugget could check and display ur email in a browser, even some images?
the progressive enhancement and graceful degradation buzzwords too
member when hwite aryan people thought in terms of such utilitarian communist hippie concepts as general purpose digital "protocols" and "standards" and "file formats" rather than "apps" and "products" and "experiences"?