<nav class="UnderlineNav UnderlineNav--right"><div class="UnderlineNav-actions"><a class="btn btn-sm" href="#url" role="button">Button</a></div><div class="UnderlineNav-body" role="tablist"><a href="#url" role="tab" class="UnderlineNav-item" tabindex="0" aria-selected="true" aria-current="page">One</a><a href="#url" role="tab" class="UnderlineNav-item" tabindex="0">Two</a></div></nav>