index.html

<header class="clearfix">
    <div class="container">
			<div class="header-left">
				<h1>Your company</h1>
			</div>
			<div class="header-right">
				<label for="open">
					<span class="hidden-desktop"></span>
				</label>
				<input type="checkbox" name="" id="open">
				<nav>
					<a href="#">Home</a>
					<a href="#">Inspiration</a>
					<a href="#">Articles</a>
					<a href="#">Works</a>
					<a href="#">Contact</a>
				</nav>
			</div>
		</div>
	</header>
<section class="clearfix">
		<div class="container">
			<div class="section-left">
				<h1 class="section-title">Lorem ipsum dolor sit amet.</h1>
				<h5 class="section-tagline">sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.</h5>
			</div>
			<div class="section-right">
				<button class="learn-more">Learn more</button>
			</div>
		</div>
	</section>

script.js

/*
bootstrap like responsive navigation (no js)

basically using checkbox to trigger the pop down navigation. 
*/

style.css

*{
  margin: 0;
	padding: 0;
	outline: none;
	border: none;
	-webkit-box-sizing: border-box;
}
*:before,
*:after{
	-webkit-box-sizing: border-box;
}
.clearfix {
  *zoom: 1;
}
html{
	font-family: Helvetica, arial, sans-serif;
	font-size: 12px;
}
body{
	background: url('brushed_alu.png');
}
.clearfix:before,
.clearfix:after {
  display: table;
  line-height: 0;
  content: "";
}
.clearfix:after {
  clear: both;
}
.container{
	width: 80%;
	margin: 0 auto;
}
header{
	width: 100%;
	height: auto;
	background: black;
}
.header-left,
.header-right{
	position: relative;
	color: white;
	float: left;
}
.header-left{
	width: 30%;
}
.header-right label{
	position: absolute;
	top: -3.7em;
	right: 0;
	cursor: pointer;
}
.header-right span{
	position: relative;
	width: 2em;
	height: 2em;
	background: rgba(255,255,255,.3);
	-webkit-transition: all .3s ease;
}
.header-right span:hover{
	background: rgba(255,255,255,.6);
}
.header-right span:before,
.header-right span:after{
	content: '';
	position: absolute;
	width: 2em;
	height: .5em;
	top: 4px;
	left: 0;
	background: black;
}
.header-right span:after{
	top: 14px;
}
.header-right{
	width: 70%;
	text-align: right;
}
#open{
	display: none;
}
h1{
	font-weight: 300;
	line-height: 40px;
}
a{
	text-decoration: none;
	color: white;
}
nav>a{
	position: relative;
	display: inline-block;
	font-size: 13px;
	line-height: 40px;
	padding: 0 2em;
	-webkit-transition: all .3s ease;
}
nav>a:hover{
	background: rgba(255,255,255,.9);
	color: black;
}
.hidden-desktop{
	display: none;
}
section{
	width: 100%;
	height: auto;
	background-image: -webkit-linear-gradient(#80059E 0%, #550486 100%);
}
.section-left,
.section-right{
	float: left;
}
.section-left{
	width: 70%;
	padding: 3em 0;
}
.section-right{
	width: 30%;
}
.section-title,
.section-tagline{
	color: white;
	font-weight: 300;
	margin: 0;
	padding: 0;
	-webkit-transition: all .4s ease;
}
.section-title{
	font-size: 4em;
	margin-bottom: .3em;
	text-shadow: 0 3px 0px black,
				 0 4px 0px rgba(150,150,150,.5);
}
.section-tagline{
	font-size: 1em;
}
.learn-more{
	display: table;
	margin: 3em auto 0;
	padding: 1em 6em;
	cursor: pointer;
	border-radius: 3px;
	box-shadow: inset 0 -3px 0 rgba(0,0,0,.8);
	background: #EAAF00;
	background-image: -webkit-linear-gradient(#EAAF00 0%, #D78100 100%);
	font-size: 1.2em;
}
.learn-more:hover{
	background: #EAAF00;
}
.learn-more:active{
	box-shadow: inset 0 2px 0 rgba(0,0,0,.8);
}

/* Portrait tablet to landscape and desktop */
@media (min-width: 768px) and (max-width: 979px) {
	.box{
		width: 49%;
		margin-bottom: 5%;
	}

	ul li:nth-child(3) .box{
		clear: both;
	}

	ul li:nth-child(2n) .box{
		margin-right: 0;
		clear: right;
	}
}

/* Small monitor */
@media (max-width: 979px){
	nav>a{
		padding: 0 1.5em;
	}
	.section-left,
	.section-right{
		width: 100%;
	}
	.section-left{
		text-align: center;
	}
	.section-right{
		padding: 0 0 2em;
	}
	.section-title{
		font-size: 4em;
		margin-bottom: .2em;
	}
	.section-tagline{
		font-size: 1.3em;
	}
	.learn-more{
		margin: 0 auto;
	}
}
 
/* Landscape phone to portrait tablet */
@media (max-width: 767px) {
	.container{
		width: 95%;
	}
	nav>a{
		padding: 0 2em;
	}
	h1{
		padding: .5em 0;
	}
	.header-left,
	.header-right{
		width: 100%;
		text-align: center;
	}
	.section-left,
	.section-right{
		width: 100%;
	}
	.section-left{
		text-align: center;
		padding: 2em 0;
	}
	.section-right{
		padding: 1em 0 2em;
	}
	.section-title{
		font-size: 3em;
		margin-bottom: .2em;
	}
	.section-tagline{
		font-size: 1.3em;
	}
	.learn-more{
		margin: 0 auto;
	}
}
 
/* Landscape phones and down */
@media (max-width: 480px) {
	body{
		padding: 0 .5em;
	}
	.container{
		width: 90%;
	}
	nav{
		height: 0;
		overflow: hidden;
		-webkit-transition: all .3s ease;
	}
	input[type="checkbox"]:checked + nav{
		height: 205px;
	}
	nav>a{
		padding: 0 1em;
		display: block;
		border-bottom: solid 1px rgba(255,255,255,.1);
	}
	h1{
		padding: .5em 0;
	}
	.header-left,
	.header-right{
		width: 100%;
		text-align: center;
	}
	.section-left,
	.section-right{
		width: 100%;
	}
	.section-left{
		text-align: center;
		padding: 1em 0;
	}
	.section-right{
		text-align: center;
		padding: 1em 0 2em;
	}
	.section-title{
		font-size: 2.4em;
		margin-bottom: 0;
	}
	.section-tagline{
		font-size: 1em;
	}
	.learn-more{
		display: table;
		margin: 0 auto;
	}
	.hidden-desktop{
		display: block;
	}
}

updated!-bootstrap-like-responsive-navigation-(no-js).markdown

updated! bootstrap like responsive navigation (no js)

I'm trying to make responsive navigation without javascript. I use checkbox to trigger the pop down navigation.

A Pen by Bobby on CodePen.

License.