Premium
Soft window light, four panes split by mullion shadows, drifts across a plaster box as if the sun moved onto it. Checked, the box is bathed in warm light with the tick in the brightest pane.
Also known as: sunlight checkbox, window light checkbox, ambient light checkbox css, warm glow 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.