AI CSS Animations

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Pop-Up Book City

A book opens flat and a paper city rises with it: a skyline stands up on the gutter fold, a bridge arches up and an accent sun lifts on its tab, then it all folds shut.

Also known as: pop up book animation, paper city css, isometric book opening, paper engineering animation.

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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.

Customizing this snippet

  • Color: set --hln-color on the element or a parent. Currently previewing #3b82f6.
  • Base size: set --hln-size. Every other dimension is in em, so the whole thing scales together. Currently previewing 16px.
  • Speed: change the duration on the transition or animation shorthand. Staggered delays are relative, so they keep their rhythm.
  • Reduced motion: the rule at the end of the CSS turns the motion off for people who asked their OS for less of it. Keep it.

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