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CSS

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CSS Base

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HTML 

              
                <header>
		  <h1 class="logo">Logo</h1>
	</header>
	
	<nav>
  			<ul>
				    <li class="nav-item"><a href="#" >Home</a></li>
				    <li class="nav-item"><a href="#" >Blog</a></li>
				    <li class="nav-item"><a href="#">About</a></li>
    				<li class="nav-item"><a href="#" >Contact</a></li>
			  </ul>
				  <div class="menu-bar">Menu
					    <span class="hamburger-icon"><i class="fa fa-bars"></i></span>
			  </div>
		</nav>
	
	<div class="container">
		  <div class="section">
			    <div class="col span_2_of_3">
      	<div class="blog-post">
        <h1 class="blog-title">Title</h1>
        <h2 class="date">Posted 28th Feb 2015</h2>
        <p class="blog-content">Ut noster tractavissent, summis hic eiusmod te quem. Doctrina velit litteris eu 
        eu fore ingeniis philosophari ne quid o ingeniis ne anim, illum ea iudicem. Pariatur duis dolor hic dolor ad vidisse amet elit ita summis, quo duis te  malis, velit nostrud ingeniis. Appellat elit tamen iudicem multos, mentitum quae sed appellat illustriora. Velit commodo cernantur se si anim do labore, probant ab aliqua aut non laborum fidelissimae. Ex quae se fugiat, et malis officia in et enim cillum ita incididunt, a irure amet an ingeniis.</p>
        <a href="#" class="post-link">Read More...</a>
      				</div>
		
				      <div class="blog-post">
        <h1 class="blog-title">Title</h1>
        <h2 class="date">Posted 22nd Feb 2015</h2>
        <p class="blog-content">Dolor offendit et consectetur, ut mandaremus est litteris, noster ab ab labore cernantur eu nulla incurreret imitarentur, qui fore malis e doctrina, de anim esse do appellat, proident sint litteris, anim arbitror consequat. Proident illum nulla laborum fore. Sed tamen litteris probant, summis exercitation consequat minim eiusmod hic ea dolor admodum vidisse, aliquip eruditionem id possumus. Si lorem ex culpa. Summis eiusmod a mentitum. Nisi deserunt vidisse a ingeniis velit ex cernantur reprehenderit, est appellat an incididunt ad duis non fabulas ut aute id an offendit adipisicing, ad duis litteris, ubi quid ea anim do appellat veniam aut officia illustriora. Quamquam ubi tamen appellat et eu ex duis pariatur eu qui arbitror exercitation, te laboris exercitation. Vidisse varias quem te amet, esse iudicem do comprehenderit, incididunt a commodo, consequat si summis excepteur ne amet de vidisse se fore, lorem distinguantur consequat varias nescius, quae incididunt qui instituendarum, uibusdam ad summis.</p>
        <a href="#" class="post-link">Read More...</a>
      </div>

				      <div class="blog-post">
					        <h1 class="blog-title">Title</h1>
        					<h2 class="date">Posted 12th Feb 2015</h2>
            <p class="blog-content">Expetendis qui probant, enim arbitror de enim irure ubi e arbitror praetermissum, nulla de probant. Velit incididunt et sint quorum. Ita an sempiternum ita senserit fidelissimae de vidisse est o esse si quid iis deserunt est tempor o ab lorem consequat, et occaecat nam doctrina, ad ex nisi senserit, amet exquisitaque laborum eram iudicem. Sed id cillum aliquip, nulla e de fugiat ingeniis. Eiusmod amet aliqua appellat sunt. Ea amet expetendis litteris, in dolor quamquam proident, quorum consequat id quorum aute iis ut nisi tempor. Ea senserit ne senserit. Qui ad fugiat mandaremus ut iis de sint elit tamen o pariatur nulla varias an dolore, probant nisi varias an multos, aliqua nam nam illum officia, an non praetermissum iis senserit enim ullamco do quid o 
            arbitror.</p>
						            <a href="#" class="post-link">Read More...</a>
				      </div>
			    </div>
				
			    <aside class="col span_1_of_3">
				      <div class="side-post">
					        <img src="http://placehold.it/800x400&text=img" alt="img">
            <p class="side-content">Ut noster tractavissent, summis hic eiusmod te quem. Doctrina velit litteris eu eu fore ingeniis philosophari ne quid o ingeniis ne anim, illum ea iudicem. Pariatur duis dolor hic dolor ad vidisse amet elit ita summis, quo duis te malis.</p>
				      </div>
				
				      <div class="side-post">
					        <p class="side-content">Ultricies lacus et, non orci gravida purus augue integer, sed turpis. Erat dapibus. 						Eleifend massa scelerisque, aenean penatibus laoreet ut in.</p>
        					<a href="#" class="button">Subscribe!</a>
				      </div>
			     </aside>
		  </div>
	</div>
!

CSS 

              
                /* Base Styles */

body{
	margin: 0;
	padding: 0;
	font-size: 16px;
	line-height: 1.4em;
	color: #222;
	background: #474747;
	font-family: 'Lato', sans-serif;
}

img{
	max-width: 100%;
	height: auto;
	border-radius: 3px;
}

a{
	text-decoration: none;
	color: inherit;
}

/* Grid */

.section {
	clear: both;
	padding: 0;
	margin: 0;
}

.col {
	display: block;
	float:left;
	margin: 1% 0 1% 1.6%;
}
.col:first-child { margin-left: 0; }

.span_3_of_3 {
	width: 100%;
}
.span_2_of_3 {
	width: 66.1%;
}
.span_1_of_3 {
	width: 32.2%;
}

/* Header & Navigation */

header{
	max-width: 100%;
	background: #222; /*FallBack*/
	background: rgba(0,0,0,.6);
	padding: 20px;
}

nav{
	width: 100%;
	margin-bottom: 1em;
	background: #323232;
	font-family: 'Poiret One', cursive;
}

.logo{
	text-align: center;
	color: #fff;
	font-size: 3em;
	font-weight: 400;
	font-family: 'Poiret One', cursive;
}

ul{
	padding: 0;
	margin: 0;
	overflow: hidden;
	color: #fff;
	text-align: center;
	-webkit-transition: max-height 0.5s;
	transition: max-height 0.5s;
}

.nav-item{
	display: inline-block;
	padding: 20px;
	font-size: 1.4em;
	-webkit-transition: background .5s;
	transition: background .5s
}

.nav-item:hover{
	background: #474747;
	cursor: pointer;
}

.menu-bar{
	width: 100%;
	-webkit-box-sizing: border-box;
  -ms-box-sizing: border-box;
  box-sizing: border-box;
	background: #2d2d2d;
	text-align: left;
	padding: 15px 20px;
	color: #fff;
	font-size: 1.4em;
	cursor: pointer;
	display: none;
}

.hamburger-icon{
	float: right;
	clear: both;
	margin-top: -5px;
	font-size: 1.4em;
}

/* Blog Posts */

.container{
	max-width: 1020px;
	margin: 0 auto;
	padding: 20px;
}

.blog-post{
	background: #fff;
	margin: 0 auto 2em auto;
	padding: 35px 30px;
	box-shadow: 5px 5px 15px -1px rgba(0,0,0,0.3);
}

.side-post{
	background: #fff;
	margin: 0 auto 1.5em auto;
	width: 15em;
	padding: 20px;
}

.blog-content{
	font-size: 1em;
	border-left: 5px solid #8EE5EE;
	padding-left: 15px;
}

.side-content{
	font-size: .9em;
	margin-top: 8px;
	margin-bottom: 0;
}

.blog-title{
	font-size: 2.5em;
	margin-top: 5px;
}

.date{
	font-size: 1em;
	font-weight: 400;
	color: #9C9C9C;
	margin-top: -10px;
	text-decoration: underline;
	text-decoration-color: currentColor;
}

.post-link{
	color: #009ACD;
	font-style: italic;
	transition: all 0.4s;
}

.post-link:hover{
	color: #005c7b;
	text-decoration: underline;
	text-decoration-color: currentColor;
	cursor: pointer;
}

/* Button */

.button{
	display: block;
	padding: 15px 20px;
	margin-top: .8em;
	background: #009ACD;
	text-align: center;
	color: #fff;
	font-size: 1.4em;
	border-radius: 3px;
	transition: all .4s ease-in;
}

.button:hover{
	background: #005c7b;
}

/*Media Queries*/

/* @900px*/
@media only screen and (max-width: 56.25em) {
	.col{ margin: 1% 0 1% 0%;}
	.span_3_of_3, .span_2_of_3, .span_1_of_3{ width: 100%; }
	.side-post{ width: 42%;
			   float: left;
			   margin: -2% 0 1% 1.6%;}
}

/* @685px*/
@media only screen and (max-width: 42.813em) {
	.side-post{ width: auto;
				padding: 15px;
			    margin: -2% auto 8% auto; }
	.blog-title{ font-size: 1.95em; }
	.date{ font-size: .9em; }		
}

/* @480px */
@media only screen and (max-width: 30em){
	nav ul{ max-height: 0; }
	.reveal{ max-height:19em; }
	nav ul .nav-item{ -webkit-box-sizing: border-box;
		 			  -moz-box-sizing: border-box;
     				  -ms-box-sizing: border-box;
        			  box-sizing: border-box;
					  width:100%;
		 			  padding: 15px; }
	
	.menu-bar{ display: block; }

}

/* @380px*/
@media only screen and (max-width: 23.75em) {
	.blog-content, .post-link{ font-size: .9em; }
	.side-content{ font-size: .8em; }
	.button{ padding: 10px 15px; }
	.nav-item{ font-size: 1.2em; }
}
!

JS 

              
                $('.menu-bar').on('click', function(){
	$('nav ul').toggleClass('reveal');
});
!
999px

Console