<div class="uk-section uk-section-default uk-flex uk-flex-middle" uk-height-viewport>
    <div class="uk-width-1-1">
        <div class="uk-container uk-text-center">

            <ul class="uk-list">
                <li><a href="" class="uk-link-muted">Link Muted</a></li>
                <li><a href="" class="uk-link-text">Link Text</a></li>
                <li class="uk-margin-top"><h3><a href="" class="uk-link-heading">Link Heading</a></h3></li>
            </ul>

        </div>
    </div>
</div>