<nav class="navbar navbar-expand-md navbar-dark bg-dark row" th:fragment="navbar">
        <a class="navbar-brand" href="/">Home</a>
        <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
            <span class="navbar-toggler-icon"></span>
        </button>

        <div class="collapse navbar-collapse" id="navbarSupportedContent">
            <ul class="navbar-nav mr-auto">
                <li class="nav-item active">
                    <a class="nav-link" href="#">Book visit</a>
                </li>
                <li class="nav-item active">
                    <a class="nav-link" href="/about">About</a>
                </li>
            </ul>
            <ul class="nav navbar-nav navbar-right" style="text-decoration: none;">
                <li><a href="#"><span class="fa fa-user"></span> Sign Up</a></li>
                <li><a href="#"><span class="fa fa-sign-in" style="margin: 0px 10px;"></span>Login</a></li>
                <li><a href="#"><span class="fa fa-sign-out"></span> Logout</a></li>
            </ul>
        </div>
    </nav>