:where(ul) li {}
:where(ul, ol) li {}
:where(header, main, footer) p:hover {}
div:where(.cool, .fun) {}
:where(ol, ul, menu, dir) :where(ol, ul, menu, dir) :where(ul, menu, dir) {}
*:where(:hover, :focus) {}
*:where(*:hover, *:focus) {}
:where(ul, ol, .lwheret) > [hidden] {}
:where(p, p:unsupported) {}
:where(:valid, :unsupported) {}
a:where(:not(:hover)) {}
