added a new clearfix problem
solved first problem removing manual clear divs, and specifying clearfix class
added nested selectors explanation
set a nested selector problem to be solved
solved problem adding an selector with specificity 0,0,0,2 - aside p
added a inherited style problem to be solved
added a inherited style problem to be solved
solved inherited style problem with a specificity selector 0,0,0,3 - aside p a
adding a new problem to be solved using specificity rule
solved both problems adding a new class selector