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HTML

About HTML Preprocessors

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

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. So you don't have access to higher-up elements like the <html> tag. If you want to add classes there that can affect the whole document, this is the place to do it.

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

To get the best cross-browser support, it is a common practice to apply vendor prefixes to CSS properties and values that require them to work. For instance -webkit- or -moz-.

We offer two popular choices: Autoprefixer (which processes your CSS server-side) and -prefix-free (which applies prefixes via a script, client-side).

Add External Stylesheets/Pens

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You can apply CSS to your Pen from any stylesheet on the web. Just put a URL to it here and we'll apply it, in the order you have them, before the CSS in the Pen itself.

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JavaScript

About JavaScript Preprocessors

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

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Babel includes JSX processing.

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You can apply a script from anywhere on the web to your Pen. Just put a URL to it here and we'll add it, in the order you have them, before the JavaScript in the Pen itself.

If the script you link to has the file extension of a preprocessor, we'll attempt to process it before applying.

You can also link to another Pen here, and we'll pull the JavaScript from that Pen and include it. If it's using a matching preprocessor, we'll combine the code before preprocessing, so you can use the linked Pen as a true dependency.

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Packages

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All packages are different, so refer to their docs for how they work.

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HTML 

              
                <div class="container">
			<header class="clearfix">

		
			</header>	
			<div class="main">
				<nav id="cbp-hrmenu" class="cbp-hrmenu">
					<ul>
						<li>
							<a href="#">Products</a>
							<div class="cbp-hrsub">
								<div class="cbp-hrsub-inner"> 
									<div>
										<h4>Learning &amp; Games</h4>
										<ul>
											<li><a href="#">Catch the Bullet</a></li>
											<li><a href="#">Snoopydoo</a></li>
											<li><a href="#">Fallen Angel</a></li>
											<li><a href="#">Sui Maker</a></li>
											<li><a href="#">Wave Master</a></li>
											<li><a href="#">Golf Pro</a></li>
										</ul>
									</div>
									<div>
										<h4>Utilities</h4>
										<ul>
											<li><a href="#">Gadget Finder</a></li>
											<li><a href="#">Green Tree Express</a></li>
											<li><a href="#">Green Tree Pro</a></li>
											<li><a href="#">Wobbler 3.0</a></li>
											<li><a href="#">Coolkid</a></li>
										</ul>
									</div>
									<div>
										<h4>Education</h4>
										<ul>
											<li><a href="#">Learn Thai</a></li>
											<li><a href="#">Math Genius</a></li>
											<li><a href="#">Chemokid</a></li>
										</ul>
										<h4>Professionals</h4>
										<ul>
											<li><a href="#">Success 1.0</a></li>
											<li><a href="#">Moneymaker</a></li>
										</ul>
									</div>
								</div><!-- /cbp-hrsub-inner -->
							</div><!-- /cbp-hrsub -->
						</li>
						<li>
							<a href="#">Downloads</a>
							<div class="cbp-hrsub">
								<div class="cbp-hrsub-inner">
									<div>
										<h4>Education &amp; Learning</h4>
										<ul>
											<li><a href="#">Learn Thai</a></li>
											<li><a href="#">Math Genius</a></li>
											<li><a href="#">Chemokid</a></li>
										</ul>
										<h4>Professionals</h4>
										<ul>
											<li><a href="#">Success 1.0</a></li>
											<li><a href="#">Moneymaker</a></li>
										</ul>
									</div>
									<div>
										<h4>Entertainment</h4>
										<ul>
											<li><a href="#">Gadget Finder</a></li>
											<li><a href="#">Green Tree Express</a></li>
											<li><a href="#">Green Tree Pro</a></li>
											<li><a href="#">Holy Cannoli</a></li>
											<li><a href="#">Wobbler 3.0</a></li>
											<li><a href="#">Coolkid</a></li>
										</ul>
									</div>
									<div>
										<h4>Games</h4>
										<ul>
											<li><a href="#">Catch the Bullet</a></li>
											<li><a href="#">Snoopydoo</a></li>
											<li><a href="#">Fallen Angel</a></li>
											<li><a href="#">Sui Maker</a></li>
											<li><a href="#">Wave Master</a></li>
											<li><a href="#">Golf Pro</a></li>
										</ul>
									</div>
								</div><!-- /cbp-hrsub-inner -->
							</div><!-- /cbp-hrsub -->
						</li>
						<li>
							<a href="#">Applications</a>
							<div class="cbp-hrsub">
								<div class="cbp-hrsub-inner"> 
									<div>
										<h4>Learning &amp; Games</h4>
										<ul>
											<li><a href="#">Catch the Bullet</a></li>
											<li><a href="#">Snoopydoo</a></li>
										</ul>
										<h4>Utilities</h4>
										<ul>
											<li><a href="#">Gadget Finder</a></li>
											<li><a href="#">Green Tree Express</a></li>
											<li><a href="#">Green Tree Pro</a></li>
											<li><a href="#">Wobbler 3.0</a></li>
											<li><a href="#">Coolkid</a></li>
										</ul>
									</div>
									<div>
										<h4>Education</h4>
										<ul>
											<li><a href="#">Learn Thai</a></li>
											<li><a href="#">Math Genius</a></li>
											<li><a href="#">Chemokid</a></li>
										</ul>
										<h4>Professionals</h4>
										<ul>
											<li><a href="#">Success 1.0</a></li>
											<li><a href="#">Moneymaker</a></li>
										</ul>
									</div>
								</div><!-- /cbp-hrsub-inner -->
							</div><!-- /cbp-hrsub -->
						</li>
						<li>
							<a href="#">Projects</a>
							<div class="cbp-hrsub">
								<div class="cbp-hrsub-inner"> 
									<div>
										<h4>Learning &amp; Games</h4>
										<ul>
											<li><a href="#">Catch the Bullet</a></li>
											<li><a href="#">Snoopydoo</a></li>
											<li><a href="#">Fallen Angel</a></li>
											<li><a href="#">Sui Maker</a></li>
											<li><a href="#">Wave Master</a></li>
											<li><a href="#">Golf Pro</a></li>
										</ul>
										<h4>Utilities</h4>
										<ul>
											<li><a href="#">Gadget Finder</a></li>
											<li><a href="#">Green Tree Express</a></li>
										</ul>
									</div>
									<div>
										<h4>Entertainment</h4>
										<ul>
											<li><a href="#">Gadget Finder</a></li>
											<li><a href="#">Green Tree Express</a></li>
											<li><a href="#">Green Tree Pro</a></li>
											<li><a href="#">Holy Cannoli</a></li>
											<li><a href="#">Wobbler 3.0</a></li>
											<li><a href="#">Coolkid</a></li>
										</ul>
									</div>
								</div><!-- /cbp-hrsub-inner -->
							</div><!-- /cbp-hrsub -->
						</li>
						<li>
							<a href="#">Freeware</a>
							<div class="cbp-hrsub">
								<div class="cbp-hrsub-inner"> 
									<div>
										<h4>Utilities</h4>
										<ul>
											<li><a href="#">Green Tree Pro</a></li>
											<li><a href="#">Wobbler 3.0</a></li>
											<li><a href="#">Coolkid</a></li>
										</ul>
										<h4>Education</h4>
										<ul>
											<li><a href="#">Learn Thai</a></li>
											<li><a href="#">Math Genius</a></li>
											<li><a href="#">Chemokid</a></li>
										</ul>
									</div>
									<div>
										<h4>Professionals</h4>
										<ul>
											<li><a href="#">Success 1.0</a></li>
											<li><a href="#">Moneymaker</a></li>
										</ul>
									</div>
									<div>
										<h4>Learning &amp; Games</h4>
										<ul>
											<li><a href="#">Catch the Bullet</a></li>
											<li><a href="#">Snoopydoo</a></li>
											<li><a href="#">Fallen Angel</a></li>
											<li><a href="#">Sui Maker</a></li>
											<li><a href="#">Wave Master</a></li>
											<li><a href="#">Golf Pro</a></li>
										</ul>
									</div>
								</div><!-- /cbp-hrsub-inner -->
							</div><!-- /cbp-hrsub -->
						</li>
					</ul>
				</nav>
			</div>
		</div>
!

CSS 

              
                /* Thanks to the guys at https://tympanus.net/codrops/ */

@import url(https://fonts.googleapis.com/css?family=Lato:300,400,700);



body, html { font-size: 100%; 	padding: 0; margin: 0;}

/* Reset */
*,
*:after,
*:before {
	-webkit-box-sizing: border-box;
	-moz-box-sizing: border-box;
	box-sizing: border-box;
}

/* Clearfix hack by Nicolas Gallagher: http://nicolasgallagher.com/micro-clearfix-hack/ */
.clearfix:before,
.clearfix:after {
	content: " ";
	display: table;
}

.clearfix:after {
	clear: both;
}

body {
    font-family: 'Lato', Calibri, Arial, sans-serif;
    color: #47a3da;
}

a {
	color: #f0f0f0;
	text-decoration: none;
}

a:hover {
	color: #000;
}

.container > header {
	width: 90%;
	max-width: 70em;
	margin: 0 auto;
	padding: 0 1.875em 3.125em 1.875em;
}

.container > header {
	padding: 2.875em 1.875em 1.875em;
}

.container > header h1 {
	font-size: 2.125em;
	line-height: 1.3;
	margin: 0;
	float: left;
	font-weight: 400;
}

.container > header span {
	display: block;
	font-weight: 700;
	text-transform: uppercase;
	letter-spacing: 0.5em;
	padding: 0 0 0.6em 0.1em;
}

.container > header nav {
	float: right;
}

.container > header nav a {
	display: block;
	float: left;
	position: relative;
	width: 2.5em;
	height: 2.5em;
	background: #fff;
	border-radius: 50%;
	color: transparent;
	margin: 0 0.1em;
	border: 4px solid #47a3da;
	text-indent: -8000px;
}

.container > header nav a:after {
	content: attr(data-info);
	color: #47a3da;
	position: absolute;
	width: 600%;
	top: 120%;
	text-align: right;
	right: 0;
	opacity: 0;
	pointer-events: none;
}

.container > header nav a:hover:after {
	opacity: 1;
}

.container > header nav a:hover {
	background: #47a3da;
}

.icon-drop:before, 
.icon-arrow-left:before {
	font-family: 'fontawesome';
	position: absolute;
	top: 0;
	width: 100%;
	height: 100%;
	speak: none;
	font-style: normal;
	font-weight: normal;
	line-height: 2;
	text-align: center;
	color: #47a3da;
	-webkit-font-smoothing: antialiased;
	text-indent: 8000px;
	padding-left: 8px;
}

.container > header nav a:hover:before {
	color: #fff;
}



.icon-drop:before {
	content: "\e000";
}

.icon-arrow-left:before {
	content: "\f060";
}
.cbp-hrmenu {
	width: 100%;
	margin-top: 2em;
	border-bottom: 4px solid #47a3da;
}

/* general ul style */
.cbp-hrmenu ul {
	margin: 0;
	padding: 0;
	list-style-type: none;
}

/* first level ul style */
.cbp-hrmenu > ul,
.cbp-hrmenu .cbp-hrsub-inner {
	width: 90%;
	max-width: 70em;
	margin: 0 auto;
	padding: 0 1.875em;
}

.cbp-hrmenu > ul > li {
	display: inline-block;
}

.cbp-hrmenu > ul > li > a {
	font-weight: 700;
	padding: 1em 2em;
	color: #999;
	display: inline-block;
}

.cbp-hrmenu > ul > li > a:hover {
	color: #47a3da;
}

.cbp-hrmenu > ul > li.cbp-hropen a,
.cbp-hrmenu > ul > li.cbp-hropen > a:hover {
	color: #fff;
	background: #47a3da;
}

/* sub-menu */
.cbp-hrmenu .cbp-hrsub {
	display: none;
	position: absolute;
	background: #47a3da;
	width: 100%;
	left: 0;
}

.cbp-hropen .cbp-hrsub {
	display: block;
	padding-bottom: 3em;
}

.cbp-hrmenu .cbp-hrsub-inner > div {
	width: 33%;
	float: left;
	padding: 0 2em 0;
}

.cbp-hrmenu .cbp-hrsub-inner:before,
.cbp-hrmenu .cbp-hrsub-inner:after {
	content: " ";
	display: table;
}

.cbp-hrmenu .cbp-hrsub-inner:after {
	clear: both;
}

.cbp-hrmenu .cbp-hrsub-inner > div a {
	line-height: 2em;
}

.cbp-hrsub h4 {
	color: #afdefa;
	padding: 2em 0 0.6em;
	margin: 0;
	font-size: 160%;
	font-weight: 300;
}

/* Examples for media queries */

@media screen and (max-width: 52.75em) { 

	.cbp-hrmenu {
		font-size: 80%;
	}

}

@media screen and (max-width: 43em) { 

	.cbp-hrmenu {
		font-size: 120%;
		border: none;
	}

	.cbp-hrmenu > ul,
	.cbp-hrmenu .cbp-hrsub-inner {
		width: 100%;
		padding: 0;
	}

	.cbp-hrmenu .cbp-hrsub-inner {
		padding: 0 2em;
		font-size: 75%;
	}

	.cbp-hrmenu > ul > li {
		display: block;
		border-bottom: 4px solid #47a3da;
	}

	.cbp-hrmenu > ul > li > a { 
		display: block;
		padding: 1em 3em;
	}

	.cbp-hrmenu .cbp-hrsub { 
		position: relative;
	}

	.cbp-hrsub h4 {
		padding-top: 0.6em;
	}

}

@media screen and (max-width: 36em) { 
	.cbp-hrmenu .cbp-hrsub-inner > div {
		width: 100%;
		float: none;
		padding: 0 2em;
	}
}
!

JS 

              
                /* Thanks to the guys at https://tympanus.net/codrops/ */

var cbpHorizontalMenu=(function(){var b=$("#cbp-hrmenu > ul > li"),g=b.children("a"),c=$("body"),d=-1;function f(){g.on("click",a);b.on("click",function(h){h.stopPropagation()})}function a(j){if(d!==-1){b.eq(d).removeClass("cbp-hropen")}var i=$(j.currentTarget).parent("li"),h=i.index();if(d===h){i.removeClass("cbp-hropen");d=-1}else{i.addClass("cbp-hropen");d=h;c.off("click").on("click",e)}return false}function e(h){b.eq(d).removeClass("cbp-hropen");d=-1}return{init:f}})();

	$(function() {
				cbpHorizontalMenu.init();
			});
!
999px

Console