There is no parent selector even with css3 but I would like to suggest in css4 we could select parent selector as this
As for child
E > F Matches any F element that is a child of an element E.
So far for parent
E < F Matches any E element that is a parent of an element F.
As for immediately precedent sibling
E + F Matches any F element immediately preceded by a sibling element E.
So far for immediately decedent sibling
E - F Matches any F element immediately decedent by a sibling element E.
As for precedent sibling
E ~ F Matches any F element preceded by a sibling element E.
So far for decedent sibling
E ^ F Matches any F element decedent by a sibling element E.
Hope this would be very useful to all.