JSFiddle - React, Tailwind, and code Playground

HTML

<div id="nav">
<ul>
    <li><a href="#">button 1</a></li>
    <li><a href="#">button 2</a></li>
    <li><a href="#">button 3</a></li>
</ul>
</div>

CSS

#nav {
    position: relative;
    height: 100px;
    width: 100%;
    background: #aaa;
}

#nav ul {
    position: absolute;
    bottom: 0;
    left: 0;
    list-style-type: none;
}

#nav ul li {
    display: block;
    float: left;
    line-height: 30px;
    padding: 0 10px;
    margin-right: 10px;
    background: #ccc;
}