Is it :modal?
This handy CSS pseudo-selector gives you a way to select elements that are modal.
Newly interoperable
Features that have recently become supported in all three engines.
Finer grained control over CSS transforms with individual transform properties
Transform elements with the translate, rotate, and scale properties
TransformStream is now supported cross-browser
Now that transform streams are supported in Chrome, Safari, and Firefox, they're finally ready for prime time!