Div nesting issue with Gumby framework grid

[postkid]

Using the Gumby Framework I'm encountering issues nesting divs.I'm trying to nest a three and seven column grid within a ten column grid. I've tried a few variations with my HTML/CSS to no avail. Figure I must be missing something fairly simple.Site LinkHTML code example:\[code\] <div class="ten columns main_col"> <p>Text removed</p> <div class="row"> <div class="three"><h2 class="100width">Core Services</h2></div> <div class="seven"></div> </div> </div>\[/code\]