open-props/css/motion/ease-in-out.css

<div align="center">

:where(:root) {
	--ease-in-out-1: cubic-bezier(0.1, 0, 0.9, 1);
	--ease-in-out-2: cubic-bezier(0.3, 0, 0.7, 1);
	--ease-in-out-3: cubic-bezier(0.5, 0, 0.5, 1);
	--ease-in-out-4: cubic-bezier(0.7, 0, 0.3, 1);
	--ease-in-out-5: cubic-bezier(0.9, 0, 0.1, 1);
}