JSFiddle - React, Tailwind, and code Playground

HTML

<ul id="nav" class="grid_16">
        <li><a href="#">FORSIDE</a></li>
        <li><a href="#">MOBIL</a></li>
        <li><a href="#">PC OG SERVERE</a></li>

    </ul>

CSS

#nav li{
    display: inline;
    text-align: center;
    list-style-type:none;
    background-color:#1A365B;
    margin: 0 6px 0 0;
    padding: 2px 20px 4px 20px;
    
    -webkit-border-radius: 8px;
    -moz-border-radius: 8px;
    border-radius: 8px;
}

#nav li:hover{
    background-color:#E0F1EA;
    border: 2px solid #000;
    color: #000000;
    padding: 0 18px 2px 18px;
}

#nav li a:hover{
    color: #000000;
}

#nav li a{
    text-decoration: none;
    color: #ffffff;
    font-weight:bold;
    font-family: 'CantarellBold', Arial, sans-serif;
    text-transform: capitalize;
    font-size: 12px;
    
}