Not possible your way.
Check this http://www.w3.org/TR/selectors/#checked
It says...
Radio and checkbox elements can be toggled by the user. Some menu
items are "checked" when the user selects them. When such elements are
toggled "on" the :checked pseudo-class applies. While the :checked
pseudo-class is dynamic in nature, and can altered by user action,
since it can also be based on the presence of semantic attributes in
the document, it applies to all media. For example, the :checked
pseudo-class initially applies to such elements that have the HTML4
selected and checked attributes as described in Section 17.2.1 of
HTML4, but of course the user can toggle "off" such elements in which
case the :checked pseudo-class would no longer apply.
...exactly, word to word.
which basically means you can change dynamically the properties of the what is checked in CSS3 but not it's parent. but oh, it's not fully supported in browsers. other way is to use JS | jQuery | MooTools | YUI etc
Also, BoltClock pointed out that there is no parent selector in CSS; so not possible via only CSS