First off add
body {
padding-top: @navbar-height + 1px; // +1 or how thick your .navbar-fixed-top border is.
}
to > theme/assest/less/app.less
then add
<?php if ( is_admin_bar_showing() ) {?>
<style>
.navbar-fixed-top { top: 46px !important; } /*wordpress adminbar height small screen */
@media (min-width: 768px) {
.navbar-fixed-top { top: 32px !important; } /*wordpress adminbar height big screen */
}
</style>
<?php
}?>
to > theme/templates/head.php