<header class="main-header">
    <!-- Logo -->
    <a href="/app" class="logo">
        <!-- mini logo for sidebar mini 50x50 pixels -->
        <span class="logo-mini"><b>DS</b></span>
        <!-- logo for regular state and mobile devices -->
        <span class="logo-lg"><b>DS</b>Admin</span>
    </a>
    <!-- Header Navbar: style can be found in header.less -->
    <nav class="navbar navbar-static-top">
        <!-- Sidebar toggle button-->
        <a href="#" class="sidebar-toggle" data-toggle="offcanvas" role="button">
            <span class="sr-only">Toggle navigation</span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
        </a>
        <div class="navbar-custom-menu">
            <ul class="nav navbar-nav">
                <li>
                    <a href="/sign/logout">
                        <i class="fa fa-power-off"></i> Logout
                    </a>
                </li>
            </ul>
        </div>

    </nav>
</header>