This website is a single HTML file. It simply uses the #anchor suffix (from 1992) and the :target CSS selector to show and hide pages/content. This setup is databaseless, javascriptless, and buildshit-free, so you can edit your website with a text editor and upload it somewhere like a normal person.
T. Mossakowski, Kolyang, и B. Krieg-Brückner. Recent Trends in Algebraic Development Techniques, 12th International Workshop, WADT’97, 1376, стр. 333-348. Springer-Verlag; D-69121 Heidelberg, Germany; http://www.springer.de, (1998)