CSS... 5?CSS4 and CSS5 are not official versions, but rather categorizations for CSS properties and features from different time periods.
Modern CSS Tooltips And Speech Bubbles (Part 2) - Smashing MagazineCreating flexible tooltip patterns without HTML complexityExploring different tooltip shapes with control using CSS properties
View transitions: Handling aspect ratio changesView transitions can be affected when the content changes aspect ratio, leading to inconsistent animations.Utilizing CSS properties like position:absolute and fit-content can help maintain consistent aspect ratios in view transitions.
CSS is Logical - Geoff GrahamDocuments flow in the direction of the writing mode.Setting z-index creates a new stacking context for managing visual overlap.
Nesting/Overriding Properties in CSSSome CSS properties like visibility and pointer-events can be 'undone', unlike properties like display or opacity.Applying the same animation to nested elements can result in interesting and fun outcomes.