Håkon Wium Lie's 'Cascading HTML Style Sheets' Proposal

Håkon Wium Lie published his first proposal for Cascading HTML Style Sheets (CHSS), outlining the core concepts of separating style from structure and defining how styles from different sources (author, user, browser) would interact.

Significance

This document laid the foundational intellectual framework for CSS, articulating the problem and offering a groundbreaking solution that would redefine web design.