.navigation{list-style:none;margin:0;background:deepskyblue;display:-webkit-box;display:-moz-box;display:-ms-flexbox;display:-webkit-flex;display:flex;-webkit-flex-flow:row wrap;justify-content:flex-end}
.navigation a{text-decoration:none;display:block;padding:1em;color:white}
.navigation a:hover{background:#00AEE8}
@media all and (max-width:800px){.navigation{justify-content:space-around}
}@media all and (max-width:600px){.navigation{-webkit-flex-flow:column wrap;padding:0}
.navigation a{text-align:center;padding:10px;border-top:1px solid rgba(255,255,255,0.3);border-bottom:1px solid rgba(0,0,0,0.1)}
.navigation li:last-of-type a{border-bottom:none}
}

<ul class="navigation">
	  <li><a href="#">Home</a></li>
	  <li><a href="#">About</a></li>
	  <li><a href="#">Products</a></li>
	  <li><a href="#">Contact</a></li>
	</ul>