A detailed technical recap of CSS Day 2026 in Amsterdam, covering 14 talks across two days. Key highlights include Lea Verou's deep dive into OKLCH color spaces and gamut mapping challenges, Josh Tumath's proposal for a text-scale meta tag to fix mobile accessibility, Jelle Raaijmakers explaining the CSS value pipeline via the from-scratch Ladybird browser, Lyra Rebane building a working x86 CPU in pure CSS, Jake Archibald covering the finally-styleable select element after 33 years, Patrick Brosset introducing the grid-lanes masonry layout spec, and Adam Argyle closing with a call for context-aware design systems. Other topics include view transitions, offset-path animations, the new attr() and if() functions, scroll state queries, and CSS DOOM.
