:lang
Pseudo class that targets an element with the same language code.
:hover
Pseudo class thats active when the cursor is ontop of an element
For hover to take effect on links that have been visited it must come after :visited
The order to specify the pseudo classes is :link :visited :hover :active.
:first-child
Pseudo class element. The first sibling of it's type within the parent element.
See also:
:first
First page of a document when @page has been used.
