JSFiddle - React, Tailwind, and code Playground

HTML

<nav>
<ul>
    <li><a href="#">home</a></li>
    <li><a href="#">references</a></li>
    <li><a href="#">competences</a></li>
    <li><a href="#">contact</a></li>
</ul>
    <strong>hover this section</strong>
</nav>

CSS

html {
    font-family: "Lucida Grande", "Lucida sans", Helvetica, Arial, sans-serif;
}

nav {
    position: relative;
    padding: 20px;
    background: rgba(0,0,0,.05);
    height: 80px;
    margin: 40px 0 0;
    
}

nav ul {
    background: rgba(0,0,0,.6);
    overflow: auto;
    padding: 5px 15px;
    margin-top: -120px;
    
    
    -moz-border-radius: 20px;
    -webkit-border-radius: 20px;
    border-radius: 20px;
    
       -moz-box-shadow: 0 0 3px rgba(0,0,0,1);
    -webkit-box-shadow: 0 0 3px rgba(0,0,0,1);
            box-shadow: 0 0 3px rgba(0,0,0,1);
    
       -moz-transition: 0.3s all ease-out;
    -webkit-transition: 0.3s all ease-out;
            transition: 0.3s all ease-out;
    
    pointer-events:none;
}
nav:hover ul {
    pointer-events:auto;

    margin-top: 10px;
    background: rgba(0,0,0,1);
    
       -moz-box-shadow: 0 0 3px rgba(0,0,0,0);
    -webkit-box-shadow: 0 0 3px rgba(0,0,0,0);
            box-shadow: 0 0 3px rgba(0,0,0,0);
}

nav ul li {
    float: left;
    margin: 0 5px 0 0;
}
nav ul li a {
    text-decoration: none;
    color: rgba(255,255,255,.05);
    text-shadow: 0 0 3px rgba(255,255,255,1);
    
       -moz-transition: 0.3s all ease-out;
    -webkit-transition: 0.3s all ease-out;
            transition: 0.3s all ease-out;
}
nav:hover ul li a {
          color: rgba(255,255,255,1);
    text-shadow: 0 0 3px rgba(255,255,255,0);
}
nav:hover ul li a:hover {
    color: rgba(255,255,255,.2);
    text-shadow: 0 0 2px rgba(255,255,255,1);
}

nav strong {
    position: absolute;
    display: block;
    text-align: center;
    left:20px;
    bottom:0px;
    left: 0px;
}