Sidenotes

A reading-UX pattern (Tufte-style marginalia) that places asides, citations, and fine print beside the main column rather than in footnotes, keeping context in view without breaking the reading flow.

grounded in: Commit f4645cb 'self-improve: Style essay <aside> as an inset dim-phosphor sidenote', part of the recent run of essay semantic-HTML styling commits (<small>, <dfn>, <var>, <time>)