JSFiddle - React, Tailwind, and code Playground

HTML

<nav id="nav-bar">
  <a href="accueil">ACCUEIL</a>
  <a href="projets">PROJETS</a>
  <a href="realisations">REALISATIONS</a>
  <a href="equipe">EQUIPE</a>
  </nav>

CSS

#nav-bar {
  display: flex;
  flex-flow: row nowrap;
  justify-content: flex-start;
  width: 420px;
  background-color: #ccc;
}

#nav-bar a {
  margin-right: 10px;
  padding: 10px;
  text-decoration: none;
  color: #000;
  }
  
  #nav-bar a:hover {
    background-color: #ff9900;
    color: red;
  }