WORK OF Z-INDEX IN CSS?

What is Opacity in CSS (Cascading Style Sheet)?

Different types of Combinators in CSS.

Different way to design a Links with the help of CSS in HTML?

What is Padding in CSS (Cascading style Sheet) and how to use it ?

what is limitations of style sheets?

Describe float containment?

What is CSS filter?

Describe hover element?

Describe the rules in style sheets?