JSFiddle - React, Tailwind, and code Playground

HTML

<div id="wrapper">
  <nav>
    <ul>
      <li>blabla</li>
      <li>balbal</li>
    </ul>
  </nav>
...
</div>

CSS

#wrapper {
    width: 950px;
    margin: 0 auto;
    background: green;
    height: 10000px;
}

nav {
    position: absolute;
    top:0; left:0; width: 100%;        
    display: block;
    background: pink;
}

ul {
    margin: 0;
    padding: 0;
    list-style-type: none;
}

ul li {
display: inline-block;
}