Animate Intrinsic Size With CSS

Animating the size of UI elements with CSS has historically been challenging, especially for properties like height. Modern CSS introduces tools such as CSS Grid and the new `calc-size()` function to make these animations more seamless. CSS Grid allows replicating intrinsic-size animations, while `calc-size()` enables developers to calculate intrinsic sizes natively. While `calc-size()` has limited browser support currently, it shows great promise for future use.