JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
    <div class="pill">
        <ul>
            <li><a href="#">Item 1</a></li>
            <li><a href="#">Item 1</a></li>
            <div class="clear"></div>
        </ul>
    </div>
</div>

CSS

.container {
    padding: 20px;
}

.pill {
    background-color: #00a38f;
    border-radius: 5px 5px 0 0;
}

ul {
    padding: 13px;
    list-style: none;
}

li {
    float:left;
    margin-right: 20px;
}

.clear {
    clear:both;
}