Simple-Css-Responsive-Menu

HTML

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
<header>
	<nav>
	<div class="handle">Menu</div>
	<ul>
		<li><a href="#">Home</a></li>
		<li><a href="#">About</a></li>
		<li><a href="#">Services</a></li>
		<li><a href="#">Product</a></li>
		<li><a href="#">Careers</a></li>
		<li><a href="#">Contact</a></li>
	</ul>
</nav>
</header>

CSS

@import url('https://fonts.googleapis.com/css?family=Open+Sans:400,600');
body{
	margin: 0;
	padding: 0;
	font-family: 'Open Sans', sans-serif;
	background: linear-gradient(135deg, #00c4cc 25%, #016BC0 75%);
	background-attachment: fixed;
}
header{
	background: transperant;
	width: 100%;
	padding: 40px 0 0px 0;
	color: white;
	text-align: center;
}
a{
	text-decoration: none;
	color: inherit;
}
nav ul{
	background-color: transperant;
	overflow: hidden;
	color: white;
	padding: 0;
	text-align: center;
	margin: 0;
	-webkit-transition: all 0.3s linear 0s;
	-moz-transition: all 0.3s linear 0s;
	-ms-transition: all 0.3s linear 0s;
	-o-transition: all 0.3s linear 0s;
	transition: all 0.3s linear 0s;
}
nav ul li{
	display: inline-block;
	padding: 20px;
	cursor:pointer;
	-webkit-transition: all 0.3s linear 0s;
	-moz-transition: all 0.3s linear 0s;
	-ms-transition: all 0.3s linear 0s;
	-o-transition: all 0.3s linear 0s;
	transition: all 0.3s linear 0s;
}
nav ul li:hover{
	color:#b3d1ff;
}
section{
	line-height: 1.5em;
	font-size: 0.9em;
	padding: 40px;
	width: 75%;
	margin: 0 auto;
	background: #ffffff;
	padding: 3em;
	border-radius:12px;
}
.handle{
	width: 100%;
	text-align: left;
	box-sizing: border-box;
	padding: 0px 10px 25px 30px;
	cursor: pointer;
	color: white;
	display: none;
}
.handle i{
	color:#ffffff;
	font-size:24px;
}
@media screen and (max-width: 580px){
	nav ul{
		max-height: 0;
		
	}
	.showing{
		max-height: 20em;
	}
	nav ul li{
		box-sizing: border-box;
		width: 89%;
		padding: 15px;
		margin-left:20px;
		margin-right:20px;
		text-align: left;
		border-bottom:1px solid #46a8e7;
	}
	nav ul li:last-of-type{
		border-bottom:none;
	}
	.handle{
		display: block;
	}
	nav ul li:hover{
		background-color:rgba(208,208,208,0.2);
		color:#ffffff;
	}
}

JavaScript

$('.handle').on('click', function(){
		$('nav ul').toggleClass('showing');
	});