Animations between pages
Sets the height of the element's margin box to the height of its containing block.
It attempts to make the margin box fill the available space in the containing block, so in a way behaving similar to 100% but applying the resulting size to the margin box rather than the box determined by box-sizing.
The text-box CSS property is a shorthand that corresponds to the text-box-trim and text-box-edge properties, which together specify the amount of space to trim from the block-start edge and block-end edge of a text element's block container.
The @container CSS at-rule is a conditional group rule that applies styles to a containment context.
Style declarations are filtered by a condition and applied to the elements within the container if the condition is true.
The condition is evaluated when the queried container size, <style-feature>, or scroll-state changes.
The @starting-style CSS at-rule is used to define starting values for properties set on an element that you want to transition from when the element receives its first style update, i.e., when an element is first displayed on a previously loaded page.