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HTML

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HTML preprocessors can make writing HTML more powerful or convenient. For instance, Markdown is designed to be easier to write and read for text documents and you could write a loop in Pug.

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Adding Classes

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About the <head>

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. If you need things in the <head> of the document, put that code here.

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Insecure Resource

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CSS

About CSS Preprocessors

CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

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CSS Base

About CSS Base

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

Vendor Prefixing

About Vendor Prefixing

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JavaScript

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JavaScript preprocessors can help make authoring JavaScript easier and more convenient.

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Babel includes JSX processing.

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HTML 

              
                <!DOCTYPE html>
<html>
  <head>
  
    <meta charset="utf-8">
		
		<title>Page Title</title>

		<!-- description text that displays below the link in google search results -->
		<meta name="description" content="Description of site" /> 

	</head>
	
	<body>
		
		<section class="page-wrap">

	
			<header> <!-- Defining the header section of the page with the appropriate tag -->
				
				<div>
					<h1>Your Name</h1>
					<p>A subhead goes here.</p>
				</div>

				<nav> <!-- The nav link semantically marks your main site navigation -->
					<ul>
						<li><a href="#block1">Nav 1</a></li>
						<li><a href="#block2">Nav 2</a></li>
						<li><a href="#block3">Nav 3</a></li>
					</ul>
				</nav>


			</header>

	  
			<article id="block1" class="module-block">
			
				<h2>2nd Level Heading</h2>
				
				<img class="right" src="http://placehold.it/150" alt="" />

				<p> Cupcake ipsum dolor. Sit amet sweet roll icing cupcake ice cream sugar plum. Danish I love biscuit carrot cake tart jelly beans candy. Chupa chups chocolate bar I love pie ice cream brownie gummi bears. Soufflé cookie I love gummi bears faworki sweet sweet tart croissant. Muffin bonbon danish wafer candy macaroon I love dessert. Muffin pudding danish chupa chups. Halvah lollipop applicake icing. Brownie I love cupcake. I love gingerbread cheesecake gummi bears powder candy toffee icing. Pastry jelly beans candy canes dragée croissant I love halvah jujubes. Cotton candy icing wafer caramels applicake.</p>

				<ul class="social">

					<li><a href="#">Link 1</a></li>
					
					<li><a href="#">Link 2</a></li>
					
					<li><a href="#">Link 3</a></li>
				
				</ul>
	
			</article>
			

		   
			<section id="block2" class="module-block">

				<h2>2nd Level Heading</h2>
				
			   	<article class="post">
					
					<h3>
						<a href="#">
							Article Title
							<img src="http://placehold.it/200" alt="" />
						</a>
					</h3>
					
					<strong class="date">1.01.2012</strong>
					
					<p>Cupcake ipsum dolor. Sit amet sweet roll icing cupcake ice cream sugar plum. Danish I love biscuit carrot cake tart jelly beans candy. Chupa chups chocolate bar I love pie ice cream brownie gummi bears. Soufflé cookie I love gummi bears faworki sweet sweet tart croissant. Muffin bonbon danish wafer candy macaroon I love dessert. Muffin pudding danish chupa chups. Halvah lollipop applicake icing. Brownie I love cupcake. I love gingerbread cheesecake gummi bears powder candy toffee icing. Pastry jelly beans candy canes dragée croissant I love halvah jujubes. Cotton candy icing wafer caramels applicake. <a href="#">Read full article &rarr;</a></p>
				
				</article>

				<article class="post">						
					
					<h3>
						<a href="#">
							Article Title 
							<img src="http://placehold.it/200" alt="" />
						</a>
					</h3>
					
					<strong class="date">01.01.2012</strong>
					
					<p>Cupcake ipsum dolor. Sit amet sweet roll icing cupcake ice cream sugar plum. Danish I love biscuit carrot cake tart jelly beans candy. Chupa chups chocolate bar I love pie ice cream brownie gummi bears. Soufflé cookie I love gummi bears faworki sweet sweet tart croissant. Muffin bonbon danish wafer candy macaroon I love dessert. Muffin pudding danish chupa chups. Halvah lollipop applicake icing. Brownie I love cupcake. I love gingerbread cheesecake gummi bears powder candy toffee icing. Pastry jelly beans candy canes dragée croissant I love halvah jujubes. Cotton candy icing wafer caramels applicake.. <a href="#">Read full article &rarr;</a></p>
				
				</article>
			
			</section>

			
			<section id="block3" class="module-block">
				
				<h2>2nd Level Heading</h2>
			  
				<ul class="gallery">

					<li>
						<a href="#">
							<img alt="" src="http://placehold.it/200"/>
						</a>
					</li>
					<li>
						<a href="#">
							<img alt="" src="http://placehold.it/200"/>
						</a>
					</li>

					<li>
						<a href="#">
							<img alt="" src="http://placehold.it/200"/>
						</a>
					</li>

					<li>
						<a href="#">
							<img alt="" src="http://placehold.it/200"/>
						</a>
					</li>

					<li>
						<a href="#">
							<img alt="" src="http://placehold.it/200"/>
						</a>
					</li>

					<li>
						<a href="#">
							<img alt="" src="http://placehold.it/200"/>
						</a>
					</li>

					<li>
						<a href="#">
							<img alt="" src="http://placehold.it/200"/>
						</a>
					</li>

					<li>
						<a href="#">
							<img alt="" src="http://placehold.it/200"/>
						</a>
					</li>

					<li>
						<a href="#">
							<img alt="" src="http://placehold.it/200"/>
						</a>
					</li>

					<li>
						<a href="#">
							<img alt="" src="http://placehold.it/200"/>
						</a>
					</li>

					<li>
						<a href="#">
							<img alt="" src="http://placehold.it/200"/>
						</a>
					</li>

					<li>
						<a href="#">
							<img alt="" src="http://placehold.it/200"/>
						</a>
					</li>

					<li>
						<a href="#">
							<img alt="" src="http://placehold.it/200"/>
						</a>
					</li>

					<li>
						<a href="#">
							<img alt="" src="http://placehold.it/200"/>
						</a>
					</li>

					<li>
						<a href="#">
							<img alt="" src="http://placehold.it/200"/>
						</a>
					</li>

				</ul>

			</section>
			
		</section><!-- page-wrap -->
			

		<footer> 

			<section class="page-wrap">

				<h2>2nd Level Heading</h2>
				
				<section class="col">

					<h3>3rd Level Heading</h3>

					<ul>
						<li><a href="#">Link</a></li>
						<li><a href="#">Link</a></li>
						<li><a href="#">Link</a></li>
						<li><a href="#">Link</a></li>
						<li><a href="#">Link</a></li>
						<li><a href="#">Link</a></li>
					</ul>

				</section>

				<section class="col">

					<h3>3rd Level Heading</h3>

					<ul>
						<li><a href="#">Link</a></li>
						<li><a href="#">Link</a></li>
						<li><a href="#">Link</a></li>
						<li><a href="#">Link</a></li>
						<li><a href="#">Link</a></li>
						<li><a href="#">Link</a></li>
					</ul>

				</section>

				<section class="col">

					<h3>3rd Level Heading</h3>

					<ul>
						<li><a href="#">Link</a></li>
						<li><a href="#">Link</a></li>
						<li><a href="#">Link</a></li>
						<li><a href="#">Link</a></li>
						<li><a href="#">Link</a></li>
						<li><a href="#">Link</a></li>
					</ul>

				</section>

				<section class="col">

					<h3>3rd Level Heading</h3>

					<ul>
						<li><a href="#">Link</a></li>
						<li><a href="#">Link</a></li>
						<li><a href="#">Link</a></li>
						<li><a href="#">Link</a></li>
						<li><a href="#">Link</a></li>
						<li><a href="#">Link</a></li>
					</ul>

				</section>
	 		
			</section>

			<p>Copyright 2012 - <a href="mailto:">Your Name</a></p>
			<p class="up"><a href="#">Go Up ⇪</a></p>

		</footer>
	



	</body>
</html>
!

CSS 

              
                
header:after,
nav:after,
footer:after,
.module-block:after,
.gallery:after,
.social:after {
  content: ".";
  display: block;
	height: 0;
	clear: both;
	visibility: hidden;
}


* {
	/* Universal reset: */
	margin:0;
	padding:0;
}


body {
	font-size: 16px;
	line-height: 1.5;
	font-family: 'Josefin Sans', sans-serif;
	color: #272727;
	background: rgb(247,251,252);
	background: -moz-linear-gradient(top,  rgba(247,251,252,1) 0%, rgba(217,237,242,1) 40%, rgba(173,217,228,1) 100%);
	background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,rgba(247,251,252,1)), color-stop(40%,rgba(217,237,242,1)), color-stop(100%,rgba(173,217,228,1)));
	background: -webkit-linear-gradient(top,  rgba(247,251,252,1) 0%,rgba(217,237,242,1) 40%,rgba(173,217,228,1) 100%);
	background: -o-linear-gradient(top,  rgba(247,251,252,1) 0%,rgba(217,237,242,1) 40%,rgba(173,217,228,1) 100%);
	background: -ms-linear-gradient(top,  rgba(247,251,252,1) 0%,rgba(217,237,242,1) 40%,rgba(173,217,228,1) 100%);
	background: linear-gradient(top,  rgba(247,251,252,1) 0%,rgba(217,237,242,1) 40%,rgba(173,217,228,1) 100%);
}

header, footer, article, section, nav, {
	/* Giving a display value to the HTML5 rendered elements: */
	display:block;
}

img { 
	border-radius: 100%; 
	max-width: 100%; 
	display: block;
}

a {
	color:#D24655;
	text-decoration:none;
	-webkit-transition: all .3s ease-in-out;
	-moz-transition: all .3s ease-in-out;
	-o-transition: all .3s ease-in-out;
	transition: all .3s ease-in-out;
}

a:hover, a:focus { /* when you declare a hover state, make sure you declare a focus state as well */
	color: #000;
}

a img {
	border:none;
}


h1 {
	font-size: 50px;
 	margin: 0;
	color: #000;
	font-weight: normal; 
	line-height: 1;
}

h2 {
	font-size: 24px;
	letter-spacing:2px;
	text-transform: uppercase;
	font-weight: normal; 
	margin: 0 0 24px; 
	line-height: 1;
}


h3 {
	font-size: 30px;
	font-weight: normal; 
	margin: 0 0 24px; 
	line-height: 1;
}

p {
	font-family: 'Vollkorn', serif;
	margin-bottom: 24px;
}



/*-------------------------------------------

    	Header
-------------------------------------------*/
header { margin: 20px 40px 60px; }

header div { 
	margin-top: 40px; 
	width: 60%; 
	float: left; 
}

header p { 
	color: #272727; 
	font-size: 18px;
	margin: 0;
	font-family: 'Josefin Sans', sans-serif;
}

nav { 
	float: right; 
	width: 40%;
}


nav ul { float: right; }

nav li {
	float: left;
	list-style: none;
	padding: 4px 0;
}

nav a {
	color:#565656;
	display: block;
	font-size:12px;
	margin:5px 2px;
	padding:10px 10px 8px;
	text-transform:uppercase;
	font-weight: bold;
	letter-spacing: 1px;
	border-right: 1px dashed rgba(0, 0, 0, .3);
}

nav li:last-child a { border-right: none; }


nav a:hover, nav a:focus {
	text-decoration:none;
	background-color:#f0f0f0;
	border-color: transparent;
}


/*-------------------------------------------

    	Footer
-------------------------------------------*/

footer {
	padding: 40px;
	background: #fff;
}

.col { 
	float: left;
	width: 21%;
	margin: 0 5% 40px 0;
}

.col:last-of-type { 
	margin-right: 0;
}

footer h2 { font-size: 18px; margin-bottom: 40px;}

footer h3 { 
	margin-bottom: 10px;
	padding-bottom: 10px;
	border-bottom: 1px dashed rgba(0,0,0,.3);
	font-size: 18px;
}

footer  ul {
	margin-left: 20px;
}

footer  li { 
	color: rgba(0,0,0,.1); /* border color */
}

footer a { font-size: 14px; }

footer p {
	margin-bottom: 0;
	clear: both;
	font-family: 'Josefin Sans', sans-serif;
	text-align: center;
}

.up {
	margin-top: 50px; 
}

.up a { 
	background: rgba(0, 0, 0, .25);
	font-size: 30px;
	padding: 12px 10px;
	border-radius: 10px;
	text-shadow: 1px 1px 2px #fff;
}

.up a:hover, .up a:focus { 
	color: rgba(0, 0, 0, .45);
	text-decoration: none;

}



/*-------------------------------------------

    	ABOUT
-------------------------------------------*/

img.right {
	float: right;
	margin: 0 0 20px 20px;
}

.social li { 
	float: left;
	list-style: none;
}


.social a { 
	display: block;
	font-size:12px;
	margin:5px 2px;
	padding:10px 10px 8px;
	text-transform:uppercase;
	font-weight: bold;
	letter-spacing: 1px;
	border-right: 1px dashed rgba(0, 0, 0, .1); 
}

.social li:last-child a { border: none; }



/*-------------------------------------------

    	Posts
-------------------------------------------*/

.post { 
	position: relative;
	margin-bottom: 50px;
	padding-left: 24%;
}

.post h3 { 
	margin-bottom: 10px;
}

.post img { 
	width: 20%; 
	position: absolute;
	left: 0;
	top: 0;
	border-radius: 0;
}

.date { 
	display: block; 
	margin-bottom: 10px; 
}


/*-------------------------------------------

    	Gallery
-------------------------------------------*/

.gallery li {
	float: left;
	list-style: none;
	width: 21%;
	margin: 0 5.3333% 20px 0;
}

.gallery li:nth-child(4n) {
	margin-right: 0;
}

.gallery a {
 	display: block;	
}

.gallery a img { 
  -webkit-transition: all 0.5s ease-in-out; 
     -moz-transition: all 0.5s ease-in-out; 
      -ms-transition: all 0.5s ease-in-out; 
       -o-transition: all 0.5s ease-in-out; 
          transition: all 0.5s ease-in-out;

}

.gallery a:hover img, .gallery a:focus img { 
	-webkit-transform: scale(1.1);  /* Saf3.1+, Chrome */
     -moz-transform: scale(1.1);  /* FF3.5+ */
      -ms-transform: scale(1.1);  /* IE9 */
       -o-transform: scale(1.1);  /* Opera 10.5+ */
          transform: scale(1.1);
}



/*-------------------------------------------

    	General
-------------------------------------------*/

.page-wrap {
	max-width:960px;
	padding: 0 20px; 
	margin:0 auto; /* center the content by defining a width and using this margin value */
}

.module-block {
	background-color: #fff;
	margin:0 0 70px 0;
	padding: 40px;
	-webkit-box-shadow: inset 0px 0px 13px rgba(68, 68, 68, 0.1); 
	-moz-box-shadow: inset 0px 0px 13px rgba(68, 68, 68, 0.1); 
	box-shadow: inset 0px 0px 13px rgba(68, 68, 68, 0.1);
	border: 1px solid rgba(0, 0, 0, .1);
}

.module-block h2 { 
	padding-bottom: 30px;
	margin-bottom: 30px;
	border-bottom: 1px dashed rgba(0,0,0,.3);
}
!

JS 

              
                //changed .page-wrap { width: 960px } to { max-width: 960px } and now it's ~responsive~. Still have some work to do to make it legit responsive though.
!
999px

Console