Positioning Css Questions

Compare all five position values by whether they stay in flow, what they are offset from, and what each one is actually good for.

Understand how stacking contexts isolate z-index into local scopes, which properties create them, and how the paint order actually works.

Work through the five real reasons a z-index is ignored, from missing positioning to ancestor stacking contexts and overflow clipping.

Understand sticky as a relative-fixed hybrid bounded by its parent, and diagnose the overflow, height, and threshold conditions that silently disable it.