<nav class="navbar navbar-expand-lg bg-dark navbar-dark sticky-top">
    <div class="col">
        <ul class="navbar-nav justify-content-center text-center">
            <li class="list-group-item" style="width: 100%;">
                <button class="btn btn-success btn-lg" data-toggle="modal"
                id="typingModalBtn" data-target="#typingModal">Typing Mode</button>
            </li>

            <li class="list-group-item" style="width: 100%;">
                <button class="btn btn-success btn-lg" data-toggle="modal"
                    id="controlsModalBtn" data-target="#controlsModal">Controls Toggle</button>
            </li>
        </ul>
    </div>
</nav>
