FANCYUI
Tune Card — physical flip
Glare
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Why it works
A glare layer is keyed to the rotation angle, so a highlight sweeps the face as it turns — that is what sells the thickness. The side the pointer enters from sets the direction of the turn.
When to use it
Two-sided content where the back is a bonus: specs behind a product, an answer behind a question.
Things to watch
Hover mode hides the back from touch and keyboard users; use `trigger="click"` (an `aria-pressed` button) when the back carries content. The hidden face is inert. Reduced motion drops the turn.
Implementation clues
- preserve-3d
- backface-visibility
- glare layer keyed to the angle
- enter side sets direction