How long can a CSS selector be?
I'm not too interested in what the 'spec' says, but rather, what browsers can actually handle. So far, I'm only aware of one browser which chokes on (very) long selectors; chrome.
Edit: Example where Chrome does not apply CSS rule to some countries, e.g. the US, Turkey, Syria and the UK, and the CSS. There are 7 selectors, and at least #5 is too long for some browsers.