Best Web Templating Framework to Convert Plaintext HTML Site

I have a large plaintext HTML website that I want to transition into a web framework with the following requirements

1. Minimal (ideally no) required changes to existing HTML pages and CSS stylesheets
2. HTML script tags can remain in page files with no alterations to their structure or function
3. Site must be hosted statically

Are there any web templating frameworks or other technologies that meet these three criteria?

Source link