UL LI justify

HTML

<nav>
    <ul>
        <li><a href="#">Home</a></li>
        <li><a href="#">Services</a></li>
        <li><a href="#">Our Customers</a></li>
        <li><a href="#">Portfolio</a></li>
    </ul>
</nav>

CSS

ul {
  width: 100%;
  text-align: justify;
  border: 1px solid #000;
  margin: 0;
  padding: 0;
  line-height: 0;
  font-size: 0.1;
}

li {
  display: inline-block;
  line-height: normal;
  font-size: 15px;
  background: #ffaaff
}
li a {
  display: block;
  color: #222;
  text-decoration: none;
  padding: 4px 12px;
  text-align: center;
  background: #ffaaaa;
}
li a:hover {
  background-color: #dd8888;
  color: #fff;
}