elp! I'm unable to find what code will work to create responsive grid layouts within articles. Please advise.
Here are two example layouts that I use with other templates, but that DO NOT work with J51 Nina Template:

<div class="row-fluid">
<div class="span4">...</div>
<div class="span8">...</div>
</div>

or something like this:

<div class="container">
<div class="row">
<div class="col-sm">One of three columns</div>
<div class="col-sm">One of three columns</div>
</div>
</div>