Premium
A taut string under the label bends toward the cursor at its zone like a string under a finger. Leave or press and it is let go, ringing down in shrinking spring swings until still.
Also known as: guitar string hover effect, elastic line css, pluck animation button, springy underline button.
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.
--btn-color on the element or a parent.
Currently previewing #3b82f6.--btn-size. Every other dimension is in
em, so the whole thing scales together. Currently previewing 18px.transition or animation
shorthand. Staggered delays are relative, so they keep their rhythm.