The build behind each one — the problem it solved, the tradeoffs, and what I'd change. Every card links through to something running: the browser tools live in the Lab, and Praxis and Build Components run on their own domains.
Shapes, glass, gradients and layered shadows tuned live in your own colours — every control copies out as plain CSS or a Tailwind arbitrary-value class.
Preserves query params already on the URL instead of clobbering them, and catches a missing utm_ prefix — built from tagging 200+ campaign URLs by hand.