JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
<div id="menu">
<ul>
  <li><a href="#home">InĂ­cio</a></li>
  <li><a href="#news">Blog</a></li>
  <li><a href="#contact">Relatar erros</a></li>
  <li><a href="#contact">Guia</a></li>
  <li><a href="#contact">Doar </a></li>
  <li><a href="#about">Sobre</a></li>
  <li><a href="#login">Contato</a></li>
</ul>
</div>

CSS

#menu {
    color:black;
    text-align:center;
    padding:5px;
    margin-right: -5px;
    margin-left: -5px;
    margin-top: -4px; }

ul {
    list-style-type: none;  margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: #0F0F0F;
    margin-right: -8px;
    margin-left: -8px; 
    text-align: center;
    }

li {
    display: inline-block;

}

li:last-child {
    border-right: none; }

li a {
    display: block;     
    font: bold 14px Franklin Gothic Demi,Tahoma,Halvetica;
    color: red;
    border-bottom:3px solid #0c0c0c;
    border-style: solid;
    border-width: 0 0 3px 0;
    border-color: black;
    text-align: center;
    padding: 12px 12px;
    text-decoration: none; }

li a:hover:not(.active) {
    background-color: #000000;
    border-bottom:3px solid #ff0000;
    color: white; }