AFAIK, "three columns" is not semantic. It has to relate to the content, not the style. Otherwise one would have defined semantic as "using full words". As a CS

AFAIK, "three columns" is not semantic. It has to relate to the content, not the style. Otherwise one would have defined semantic as "using full words". As a CSS framework can't cover all the cases, you need to apply it in a semantic way. Some pseudo-LESS-code would be like: .introduction { .column; .one-of-three; }