<nav>
  <ul class="main-nav">
    <li><a href="#">Menu 1</a></li>
    <li><a href="#">Menu 2</a></li>
    <li><a href="#">Menu 3</a></li>
    <li><a href="#">Menu 4</a></li>
    <li class="class"><a href="#">Menu 5</a></li>
  </ul>
</nav>
.main-nav {
  display: -webkit-flex;
  display: flex;
}
.main-nav li.class {
  margin-left: auto;
}
.main-nav a {
  margin: 10px;
  border-radius: 5px;
  background: #60B99A;
  color: #fff;
	display: block;
	padding: 15px;
	text-decoration: none;
}

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