Style your webpage like Edward Tufte’s handouts.

Uses a variety of css rules (embedding stuff in e.g. article, figure, checkbox tags) to emulate Tufte's visual design,
with margin notes, side-notes, and image positioning close to its text.

Some implementations seem a bit awkward (the way sidenotes are declared, the iframe wrapper introduced) and the link-underline text-shadow hack seems pretty bad (especially on restyling pages dark-mode), but it seems nice for inspiration.

Example page here.