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A tick stands on a stone sundial. Checking moves the sun up its arc, so the tick's long cast shadow swings round the dial, shortens and lands in the box as a solid tick.
Also known as: sundial checkbox, shadow checkbox, 3d shadow checkbox css, sun shadow checkbox.
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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.