Bulma class: .navbar-end

    <nav class="navbar" role="navigation" aria-label="main navigation">
        <div class="navbar-brand">
            <a class="navbar-item" href="#">
                LOGO
            </a>
            <a role="button" class="navbar-burger" aria-label="menu" aria-expanded="false" data-target="navbarBasicExample">
                <span aria-hidden="true"></span>
                <span aria-hidden="true"></span>
                <span aria-hidden="true"></span>
            </a>
        </div>
        <div id="navbarBasicExample" class="navbar-menu">
            <div class="navbar-start">
                <a class="navbar-item">
                Home
                </a>
                <a class="navbar-item">
                Link
                </a>
                <a class="navbar-item">
                    Link
                </a>
            </div>
            <div class="navbar-end">
                <div class="navbar-item">
                    <div class="buttons">
                        <a class="button is-primary">
                        <strong>Sign up</strong>
                        </a>
                        <a class="button is-light">
                        Log in
                        </a>
                    </div>
                </div>
            </div>
        </div>
    </nav>