Premium
A browser sidebar tab with a Pin switch. On, the title fades, the tab clips down to its favicon tile, arcs up into the pinned row with an overshoot and a hairline divider draws beneath it.
Also known as: pin tab animation, arc browser sidebar css, pinned tabs toggle, tab to favicon animation.
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.
--tgl-color on the element or a parent.
Currently previewing #3b82f6.--tgl-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.