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HTML 

              
                <!DOCTYPE html>
<html lang="en" class="no-js">
	<head>
		<script src="js/modernizr.custom.js"></script>
	</head>
	<body class="">
    
		<div class="container">
    <div class="breadcrumbs">
			<ul class="social">
        <li><span>V 1.0 |</span> Sliding Menu</li>
			</ul>
		</div>
			<header class="clearfix">
				<span>Test Lab</span>
				<h1>Useless testing</h1>
				<nav>
					<a href="#" class="icon-arrow-left" data-info="Previous">Previous</a>
					<a href="#" class="icon-drop" data-info="See All">See All</a>
				</nav>
			</header> <!--End Header -->
			<ul class="tl-menu">
				<li><a href="#" class="icon-logo">Logo</a></li>
				<li><a href="#" class="icon-tag" id="navItem1">Option 1</a></li>
				<li><a href="#" class="icon-chart" id="navItem2">Option 2</a></li>
				<li><a href="#" class="entypo-camera" id="navItem3">Option 3</a></li>
				<li class="tl-current">
          <a href="#" class="icon-download" id="navItem4">Active</a></li>
				<li><a href="#" class="icon-flag" id="navItem5">Option 4</a></li>
				<li><a href="#" class="icon-lamp" id="navItem6">Option 5</a></li>
				<li><a href="#" class="icon-file" id="navItem7">Option 6</a></li>
			</ul>
			<div class="main">
				<h2>Headline</h2>
        
        <div class="tabs">
          <input type="radio" name="tabs" id="styles" checked />
          <input type="radio" name="tabs" id="typography" />
          <label for="styles">Styles</label>   
          <label for="typography"><span class="entypo-camera">      </span>Typography</label>    
        </div>  <!--End Tabs -->
        
        <h3>Lorem ipsum dolor sit amet, feugait invidunt vix no. Eu has veri habeo inermis. Vel an ignota aperiri scriptorem.</h3>
          <p>Sanctus efficiantur has ei, tantas expetendis philosophia cu nec, dignissim voluptatibus no mei. Ne mei probatus conceptam, nec cu ullum placerat adolescens. Sit at melius minimum pertinax, ipsum menandri vel et.Ne vis error maiorum, saepe adolescens definitiones id mea. Ignota semper ne eos, et duo pertinax imperdiet. Vix soluta utamur fabellas ne, eos moderatius accommodare et. In eros justo qui, an eam dicam praesent dissentiunt. Ex vel fastidii moderatius, recusabo gloriatur rationibus ea usu, pro cu possim consequat.</p>           
        
        <p>Ex utamur aliquip mea, vel sumo legendos ea, illud legimus ad eam. Nec cibo assum postea ut, mei ex esse persecuti dissentias, in munere conceptam quo. Vis in essent cetero sanctus, diam rebum constituam nam id. Probo impetus ei vix, no nihil dignissim pro. Pro illum posse habemus te, has ei bonorum detraxit mediocrem, modo volumus in pro. Persius adversarium ut usu. Reque nihil albucius in cum, elitr efficiendi dissentiet te pri. Cibo homero vim et. Pro in eirmod pertinax, usu eu graeco discere appellantur. Suas vidit autem eam ut, ea mel sale forensibus. Dicta vulputate voluptaria te duo. Porro facete id est.Amet hendrerit te vis. His in harum ignota essent, dolore suavitate ius ex. Sea iriure incorrupte ea, pro legere fastidii no, sit meis ceteros albucius eu. Et vis omnis idque regione.</p>

        
        <div class="btn_container">
          <a href="#" class="btn blue">Button</a>
        </div> <!--End Btn Containter -->

         <div class="btn_container">
            <a href="#" class="btn outline">Button</a>
          </div> <!--End Btn Containter -->
        
                <div class="btn_container">
          <a href="#" class="btn blue2">Button</a>
        </div> <!--End Btn Containter -->

			</div> <!--End Main -->
      
<!--Slider Nav 1-->
      
       <nav class="slider-menu slider-menu-vertical slider-menu-left" id="slider-menu-s1">
			    <h3>MENU</h3>
         <a href="#"><span class="icon-flag"></span>Item 1</a>
         <a href="#"><span class="icon-flag"></span>Item 2</a>
			    <a href="#"><span class="icon-flag"></span>Item 3</a>
			    <a href="#"><span class="icon-flag"></span>Item 4</a>
			    <a href="#"><span class="icon-flag"></span>Item 5</a>
          <a href="#"><span class="icon-flag"></span>Item 6</a>
          <a href="#"><span class="icon-flag"></span>Item 7</a>
		    </nav>

		</div> <!--End Containter -->
    
    
    		<!-- Classie - class helper functions by @desandro https://github.com/desandro/classie -->
    
        		<!-- Add id=navItem# to nav and add a seperate function below to match the id. Each nav item must have a unique id navItem1#. -->
		<script src="js/classie.js"></script>
		<script>
			var menuLeft = document.getElementById( 'slider-menu-s1' ),
				showLeft = document.getElementById( 'showLeft' ),
				body = document.body;

			navItem1.onclick = function() {
				classie.toggle( this, 'active' );
				classie.toggle( menuLeft, 'slider-menu-open' );
				disableOther( 'navItem1' );
			};
      
			navItem2.onclick = function() {
				classie.toggle( this, 'active' );
				classie.toggle( menuLeft, 'slider-menu-open' );
				disableOther( 'navItem2' );
			};
      
      navItem3.onclick = function() {
				classie.toggle( this, 'active' );
				classie.toggle( menuLeft, 'slider-menu-open' );
				disableOther( 'navItem3' );
			};
      
      navItem4.onclick = function() {
				classie.toggle( this, 'active' );
				classie.toggle( menuLeft, 'slider-menu-open' );
				disableOther( 'navItem4' );
			};
      
			navItem5.onclick = function() {
				classie.toggle( this, 'active' );
				classie.toggle( menuLeft, 'slider-menu-open' );
				disableOther( 'navItem5' );
			};
      
      navItem6.onclick = function() {
				classie.toggle( this, 'active' );
				classie.toggle( menuLeft, 'slider-menu-open' );
				disableOther( 'navItem6' );
			};
      
      navItem7.onclick = function() {
				classie.toggle( this, 'active' );
				classie.toggle( menuLeft, 'slider-menu-open' );
				disableOther( 'navItem7' );
			};

			function disableOther( button ) {
				if( button !== 'showLeft' ) {
					classie.toggle( showLeft, 'disabled' );
				}
			}
		</script>

    
	</body>
</html>
!

CSS 

              
                @charset "utf-8";

@import url(http://weloveiconfonts.com/api/?family=entypo|fontawesome);

/* ---------- ENTYPO ---------- */
[class*="entypo-"]:before {
  font-family: 'entypo', sans-serif;
  font-weight: normal;
	font-style: normal;
}

/* ---------- FONTAWESOME ---------- */
[class*="fontawesome-"]:before {
  font-family: 'FontAwesome', sans-serif;
}

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

/* 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: "HelveticaNeue-Light", "Helvetica Neue Light", "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif; 
    color: #47a3da;

}

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

a:hover {
	color: #000;
}



.main,
.container > header {
	width: 90%;
	max-width: 70em;
	margin: 0 auto;
	padding: 0 4em 3.125em 6em;
}

.main {
	color: #6d7e97;
	font-weight: 400;
	line-height: 1.5;
	text-align: justify;
}

.main p {
	font-size: 140%;
}

.main h2 {
	font-size: 400%;
	font-weight: 700;
	color: #171d26;
/* 	border-bottom: 1px solid #bbcce0; */ 
	text-align: left;
}

.main h3 {
	font-size: 190%;
	font-weight: 400;
  color: #6d7e97;
/* 	border-bottom: 1px solid #bbcce0; */ 
	text-align: left;
}

.container > header {
	padding: 2.875em 4em 1.875em 6em;
}

.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;
  text-shadow: 1px 1px 0px rgba(25,58,77,0.2);
	padding-left: 8px;
}

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

.icon-drop:before {
	content: "\f00a";
}

.icon-arrow-left:before {
	content: "\f060";
}

.container > .breadcrumbs {
background: #b2b2b2;
border-bottom: 1px solid #bbcce0;
width: 100%;
height: 80px;
position: relative;
background-color: #ddf2ff;
background-image: -webkit-gradient(linear, left top, left bottom, from(#ddf2ff), to(#d1eeff));
background-image: -webkit-linear-gradient(top, #ddf2ff, #d1eeff);
background-image: -moz-linear-gradient(top, #ddf2ff, #d1eeff);
background-image: -o-linear-gradient(top, #ddf2ff, #d1eeff);
background-image: -ms-linear-gradient(top, #ddf2ff, #d1eeff);
background-image: linear-gradient(top, #ddf2ff, #d1eeff);
filter: progid:DXImageTransform.Microsoft.gradient(GradientType=0,StartColorStr='#ddf2ff', EndColorStr='#d1eeff');
}

.container > .breadcrumbs .social {
position: absolute;
top: 14px;
right: 120px;
color: #9098a7;
list-style: none;
font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
font-style: normal;
font-weight: normal;
font-size: 1.125em;
text-shadow: 0px 1px 0px rgba(256,256,256,0.4);
}

.container > .breadcrumbs .social span{
 font-weight: 700;
}


/* ---------- MENU ---------- */

.tl-menu {
	position: fixed;
	overflow: hidden;
	top: 0;
	left: 0;
	height: 100%;
	list-style-type: none;
	margin: 0;
	padding: 0;
	background: #1b1e24;
  z-index: 9999;
}

.tl-menu li a {
	display: block;
	text-indent: -500em;
	height: 5em;
	width: 5em;
	line-height: 5em;
	text-align: center;
	color: #999;
	position: relative;
	border-bottom: 1px solid rgba(104,114,134,0.05);
	-webkit-transition: background 0.1s ease-in-out;
	-moz-transition: background 0.1s ease-in-out;
	transition: background 0.1s ease-in-out;
}

.tl-menu li a:hover,
.tl-menu li:first-child a{
color: #FFF;
background-color: #47a3da;
text-shadow: 0 1px 1px rgba(57, 132, 177, 0.75);
-webkit-box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 1px 2px rgba(0, 0, 0, 0.05);
-moz-box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 1px 2px rgba(0, 0, 0, 0.05);
box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 1px 2px rgba(0, 0, 0, 0.05);
}

.tl-menu li a:active {
	background: #afdefa;
  color: #FFF;}

/* class for current item */
.tl-menu li.tl-current a {
	background: #343a47;
	color: #bbe6fe;
}

.tl-menu li a:before {
	font-family: 'entypo', sans-serif;
	speak: none;
	font-style: normal;
	font-weight: normal;
	text-indent: 0em;
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	font-size: 1.4em;
	-webkit-font-smoothing: antialiased;
}

.tl-menu li a.icon-logo:before {
	content: "\e714";
	font-weight: 700;
	font-size: 300%;
}


.icon-chart:before {
	content: "\1f53e";

}

.icon-tag:before {
  font-family: 'entypo', sans-serif;
	content: "\e70c";
}

.icon-download:before {
	content: "\1f4e5";
}

.icon-flag:before {
	content: "\2691";
}

.icon-file:before {
	content: "\e731";
}

.icon-lamp:before {
	content:  "\1f4a1"
}

/* ---------- TABS ---------- */

.main > .tabs {
  height: 52px;
  background: #fff;
  border-bottom: 1px solid #bbcce0;
  border-top: 1px solid #bbcce0;
}

.main > .tabs input[name=tabs]{
  position: relative;
  z-index: -9999;
  left: -9999px;
  top: -9999px;
}

input#styles:checked ~ label[for=styles] {
  background-color: #47A3DA;
  color: #fff;
  -webkit-transition: all .3s;
  -moz-transition: all .3s;
  -ms-transition: all .3s;
  -o-transition: all .3s;
  transition: all .3s;  
}

input#styles:checked ~ label[for=typography] {
  color: #bbcce0;
}

input#typography:checked ~ label[for=typography] {
  background-color: #47A3DA;
  color: #fff;
  -webkit-transition: all .3s;
  -moz-transition: all .3s;
  -ms-transition: all .3s;
  -o-transition: all .3s;
  transition: all .3s;  
}

input#typography:checked ~ label[for=styles] {
  color: #bbcce0;
  
}

.main > .tabs label span {
  margin-right: 10px;
}

.main > .tabs label {
  display: inline-block;
  padding: 14px 20px;
  border-right: 1px solid #bbcce0;
  cursor: pointer;
  outline: none;
  
  /* Text */
  color: #5F646F;
  font-size: 15px;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 1px;
  -webkit-font-smoothing: subpixel-antialiased;
  -webkit-text-stroke: 1px transparent;
}

.main > .tabs label:first-of-type {
  margin: 0 -4px 0 -43px;  
}



/* ---------- BUTTON ---------- */

.btn_container {
	margin: 20px auto;
  display: inline-block;
}

.btn {
cursor: pointer;
display: inline-block;
width: 280px;
padding: 20px 64px;
margin-right: 10px;
text-align: center;
vertical-align: middle;
text-transform: uppercase;
text-decoration: none;
font-style: normal;
font-weight: 700;
font-size: 16px;
letter-spacing: .05px;
line-height: normal;
border-radius: 2px;
-webkit-border-radius: 2px;
-moz-border-radius: 2px;
-webkit-font-smoothing: antialiased;
}


.btn.blue {
color: #FFF;
background-color: #47A3DA;
text-shadow: 0px 1px 0px rgba(25,58,77,0.4);
border: 1px solid #377da6;
-webkit-box-shadow: inset 0px 1px 1px rgba(255, 255, 255, 0.5), 0px 1px 1px rgba(23,36,45, 0.3);
-moz-box-shadow: inset 0px 1px 1px rgba(255, 255, 255, 0.5), 0px 1px 1px rgba(23,36,45, 0.3);
box-shadow: inset 0px 1px 1px rgba(255, 255, 255, 0.5), 0px 1px 1px rgba(23,36,45, 0.3);
}

.btn.blue2 {
color: #FFF;
background-color: #6d7e97;
text-shadow: 0px 1px 0px rgba(25,58,77,0.4);
border: 1px solid #377da6;
-webkit-box-shadow: inset 0px 1px 1px rgba(255, 255, 255, 0.5), 0px 1px 1px rgba(23,36,45, 0.3);
-moz-box-shadow: inset 0px 1px 1px rgba(255, 255, 255, 0.5), 0px 1px 1px rgba(23,36,45, 0.3);
box-shadow: inset 0px 1px 1px rgba(255, 255, 255, 0.5), 0px 1px 1px rgba(23,36,45, 0.3);
}

.btn.outline {
color: #47A3DA;
text-shadow: 0 1px 0 rgba(0,0,0,0.1);
border: 3px solid;
border-color: #47A3DA;
border-radius: 2px;
-webkit-border-radius: 2px;
-moz-border-radius: 2px;
}

/* ---------- BUTTON HOVER ---------- */

.btn.blue:hover {
background-color: #2E373F;
border: 1px solid #2E373F;
-webkit-transition: all .3s;
-moz-transition: all .3s;
-ms-transition: all .3s;
-o-transition: all .3s;
transition: all .3s;  
}

.btn.blue2:hover {
background-color: #171d26;
border: 1px solid #171d26;
-webkit-transition: all .3s;
-moz-transition: all .3s;
-ms-transition: all .3s;
-o-transition: all .3s;
transition: all .3s;  
}

.btn.outline:hover {
color: #171d26;
background-color: rgba(23, 29, 38, 0.1);
border-color: #171d26;
text-shadow: none;
-webkit-transition: all .3s;
-moz-transition: all .3s;
-ms-transition: all .3s;
-o-transition: all .3s;
transition: all .3s;
}


/* ---------- SLIDER MENU ---------- */

/* General styles for all menus */
.slider-menu {
position: fixed;
background-color: #2d2e3c;
background-image: -webkit-gradient(linear, left center, right center, from(#2d2e3c), to(#3c3d50));
background-image: -webkit-linear-gradient(left, #2d2e3c, #3c3d50);
background-image: -moz-linear-gradient(left, #2d2e3c, #3c3d50);
background-image: -o-linear-gradient(left, #2d2e3c, #3c3d50);
background-image: -ms-linear-gradient(left, #2d2e3c, #3c3d50);
background-image: linear-gradient(left, #2d2e3c, #3c3d50);
filter: progid:DXImageTransform.Microsoft.gradient(GradientType=1,StartColorStr='#2d2e3c', EndColorStr='#3c3d50');

}

.slider-menu h3 {
	color: #FFF;
	font-size: 1.9em;
	padding: 22px;
	margin: 0;
	font-weight: 300;
  background-color: #1d85be;
background-image: -webkit-gradient(linear, 0 0, 100% 0, from(#1d85be), to(#47a3da));
background-image: -webkit-linear-gradient(left, #1d85be, #47a3da);
background-image: -moz-linear-gradient(left, #1d85be, #47a3da);
background-image: -o-linear-gradient(left, #1d85be, #47a3da);
background-image: linear-gradient(left, #1d85be, #47a3da);
filter: progid:DXImageTransform.Microsoft.gradient(GradientType=1,StartColorStr='#1d85be', EndColorStr='#47a3da');


}

.slider-menu a {
	display: block;
	color: #999;
	font-size: 1.1em;
	font-weight: 300;
  height: 80px;
  text-transform: uppercase;
  letter-spacing: 1px;

}

.slider-menu a:hover {
	background: #258ecd;
  color: #FFF;
  text-shadow: 0 1px 1px rgba(57, 132, 177, 0.75);
  -webkit-transition: all 0.3s ease;
	-moz-transition: all 0.3s ease;
	transition: all 0.3s ease;
}

.slider-menu a:active {
	background: #afdefa;
  color: #FFF;
}

/* Orientation-dependent styles for the content of the menu */

.slider-menu-vertical {
	width: 240px;
	height: 100%;
	top: 0;
	z-index: 1000;
}

.slider-menu-vertical a {
	border-bottom: 1px solid #30303f;
	padding: 1.6em;
-webkit-box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 1px 2px rgba(0, 0, 0, 0.05);
-moz-box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 1px 2px rgba(0, 0, 0, 0.05);
box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 1px 2px rgba(0, 0, 0, 0.05);
    vertical-align: middle;
}


/* Vertical menu that slides from the left or right */

.slider-menu-left {
	left: -240px;
}

.slider-menu-left.slider-menu-open {
	left: 80px;
}

.slider-menu span {
  margin-right: 10px;
}

/* Transitions */

.slider-menu {
	-webkit-transition: all 0.3s ease;
	-moz-transition: all 0.3s ease;
	transition: all 0.3s ease;
}



/* media query (depends on total height of menu) */
@media screen and (max-height: 34.9375em) { 

.tl-menu {
		font-size: 70%;
	}
  
  	.slider-menu-vertical {
		font-size: 90%;
		width: 190px;
	}

	.slider-menu-left,{
		left: -190px;
	}

}
!

JS 

              
                /*!
 * classie - class helper functions
 * from bonzo https://github.com/ded/bonzo
 * 
 * classie.has( elem, 'my-class' ) -> true/false
 * classie.add( elem, 'my-new-class' )
 * classie.remove( elem, 'my-unwanted-class' )
 * classie.toggle( elem, 'my-class' )
 */

/*jshint browser: true, strict: true, undef: true */

( function( window ) {

'use strict';

// class helper functions from bonzo https://github.com/ded/bonzo

function classReg( className ) {
  return new RegExp("(^|\\s+)" + className + "(\\s+|$)");
}

// classList support for class management
// altho to be fair, the api sucks because it won't accept multiple classes at once
var hasClass, addClass, removeClass;

if ( 'classList' in document.documentElement ) {
  hasClass = function( elem, c ) {
    return elem.classList.contains( c );
  };
  addClass = function( elem, c ) {
    elem.classList.add( c );
  };
  removeClass = function( elem, c ) {
    elem.classList.remove( c );
  };
}
else {
  hasClass = function( elem, c ) {
    return classReg( c ).test( elem.className );
  };
  addClass = function( elem, c ) {
    if ( !hasClass( elem, c ) ) {
      elem.className = elem.className + ' ' + c;
    }
  };
  removeClass = function( elem, c ) {
    elem.className = elem.className.replace( classReg( c ), ' ' );
  };
}

function toggleClass( elem, c ) {
  var fn = hasClass( elem, c ) ? removeClass : addClass;
  fn( elem, c );
}

window.classie = {
  // full names
  hasClass: hasClass,
  addClass: addClass,
  removeClass: removeClass,
  toggleClass: toggleClass,
  // short names
  has: hasClass,
  add: addClass,
  remove: removeClass,
  toggle: toggleClass
};

})( window );
!
999px

Console