encountered a problem:
<div class="row"> <div class="col-lg-4 col-md-4 col-sm-4"> </div> <div class="col-lg-4 col-md-4 col-sm-4"> </div> <div class="col-lg-4 col-md-4 col-sm-4"> </div> <div class="col-lg-4 col-md-4 col-sm-4"> </div> </div> in theory, .row should be filled with blocks from left to right, even if there is an overflow, as in this case. But it looks like this: http://take.ms/OJVhE