Premium
Hover or focus the card and design handoff redlines draw out from it: selection handles, then width and height lines with arrowheads, then their size labels. They pull back in when you leave.
Also known as: figma measurement hover, redline dimension lines css, design spec border animation, inspect mode hover card.
Premium
Everything you see above is live. Basic and Pro include every premium piece, with the HTML and CSS ready to copy, plus the Tailwind version where there is one and Motions in Claude Code on Pro.
--bdr-color on the element or a parent.
Currently previewing #3b82f6.--bdr-size. Every other dimension is in
em, so the whole thing scales together. Currently previewing 16px.transition or animation
shorthand. Staggered delays are relative, so they keep their rhythm.