AI CSS Animations

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CRT Phosphor Check

A tiny CRT warms up from a dot to a line to a lit screen, and a beam traces the tick in phosphor that glows hot and cools. Unchecking powers it off: the image folds to a line, then a dot.

Also known as: crt checkbox, retro monitor checkbox, tv power off animation, phosphor glow 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.

Customizing this snippet

  • Color: set --chk-color on the element or a parent. Currently previewing #3b82f6.
  • Size: set --chk-size. Every other dimension is in em, so the whole thing scales together. Currently previewing 24px.
  • 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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