CSS classes inheritance

[gabbaguru]

I have CSS rule like this:\[code\].c1 .c2 .c3 { //some css rules}\[/code\]Can I apply these rules in one step:\[code\]<div class="c1 c2 c3"> //some web content</div>\[/code\]Or I have to make structures like:\[code\]<div class="c1"> <div class="c2"> <div class="c3"> //some web content </div> </div></div>\[/code\]Or maybe there is easier way to do this? I want to apply this rules to single divs and I am not allowed to make changes to css definition file.