according to CSS The missing manual second edition “When more than one style applies to a tag, a web browser must determine which style should “win out” in case style properties conflicts. In CSS, a style’s importance is known as specificity and i

If you still have to deal with ancient browsers like IE6, be aware that it doesn't read chained class selectors correctly: it'll only read the last class selector (.bar in this case) instead, regardless of what other classes you list.

CSS Pseudo-Klassen wie hover, focus und visited entstehen meist bei Benutzeraktionen und können nicht inline im style-Attribut stehen.