top: 50%;
bottom: auto;
-webkit-transform: translateY(-50%);
-ms-transform: translateY(-50%);
-moz-transform: translateY(-50%);
transform: translateY(-50%);
.container();
==============================================
vertical center elements inside a "col-"
@media screen and (min-width: 768px)
user.less:350
.footer-logos [class*="col-"] {
float: none;
display: table-cell;
vertical-align: middle;
}