Premium
A 12 tooth gear turns an 8 tooth pinion at the true 3 to 2 ratio, which drives a rack that raises a pennant. The flag fills with color, unfurls and waves once at the top.
Also known as: gear checkbox, gear animation css, flag raise checkbox, mechanical checkbox.
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.
--chk-color on the element or a parent.
Currently previewing #3b82f6.--chk-size. Every other dimension is in
em, so the whole thing scales together. Currently previewing 24px.transition or animation
shorthand. Staggered delays are relative, so they keep their rhythm.