Ghost_Ruby_Theme/partials/header.hbs

<header class="site-header">
    <div class="navbar">
        <div class="navbar-left">
            {{> logo}}
        </div>
        {{#if @site.navigation}}
            <nav class="main-menu hidden-xs hidden-sm hidden-md">
                {{navigation}}
            </nav>
        {{/if}}
        <div class="navbar-right">
            <div class="social hidden-xs hidden-sm"></div>
            {{> burger}}
        </div>
    </div>
</header>