I am trying to vertical align two divs in a table-cell, using bootstrap 3 RC1. I have applied the vertical-align class but what am I missing? Bootply here: http://bootply.com/73625
HTML
<div class="content">
<div class="col-lg-6 col-md-6 col-12 child1">Child content</div>
<div class="col-lg-6 col-md-6 col-12 child2">Child content</div>
</div>
CSS
.content{
position:absolute;
top:40px;
bottom:0px;
width:100%;
border:4px solid green;
display:table-cell;
vertical-align:middle;
}
.child1{
border:4px solid blue;
}
.child2{
border:4px solid red;
}