Transition on displayTransition on Display Property
A CSS transition is not working because the display property cannot be transitioned.
z-index stacking contextElements are not layering as expected despite z-index values being set.
z-index only works on positioned elements (position: relative, absolute, fixed, or sticky). Additionally, properties like transform, opacity < 1, and filter create new stacking contexts that isolate z-index values.
Add position: relative to elements that need z-index. Understand which properties create new stacking contexts. Organize your stacking contexts intentionally. Use browser DevTools to inspect stacking contexts.
Transition on displayA CSS transition is not working because the display property cannot be transitioned.
Specificity conflictA CSS rule is not applied because a more specific selector overrides it.
Invalid @keyframesThe @keyframes animation definition has a syntax error.
Invalid selectorThe CSS selector syntax is not valid.
Duplicate selectorThe same selector appears multiple times in the stylesheet.
Overflow hidden clippingContent is being clipped or hidden unexpectedly due to overflow settings.