Premium
The top edge carries a main scale and a vernier scale beneath it. The vernier steps along in tenths, and the one tick that lines up with the main scale lights at each stop.
Also known as: vernier caliper animation, ruler border css, measuring scale animation, tick mark border css.
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.