Floating
Fixed
Layout Containment
Contains floated and fixed-position elements, as well as creating a new z-index 'stacking context'.
Contains floated and fixed-position elements, as well as creating a new z-index 'stacking context'.
Contains counters (and quotes).
Inline-size ignores contents (no visible impact on most block elements that have 100% inline-size by default).
Both dimensions are sized ignoring contents, which causes the box to collapse.