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              <body>
<main id="cd-main-content">
	<section id="cd-intro">
		<h1>Full Page Intro &amp; Navigation</h1>

		<header class="cd-header">
			<div id="cd-logo"><a href="#0"><img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/148866/cd-logo_2.svg" alt="Logo"></a></div>
			<a class="cd-menu-trigger" href="#main-nav">Menu<span></span></a>
		</header>
		<div class="cd-blurred-bg"></div>
	</section> <!-- cd-intro -->
</main>

<div class="cd-shadow-layer"></div>

<nav id="main-nav">
	<ul>
		<li><a href="#0"><span>Tour</span></a></li>
		<li><a href="#0"><span>Pricing</span></a></li>
		<li><a href="#0"><span>Labs</span></a></li>
		<li><a href="#0"><span>About</span></a></li>
		<li><a href="#0"><span>Contact us</span></a></li>
	</ul>
	<a href="#0" class="cd-close-menu">Close<span></span></a>
</nav>
</body>
            
          
!
            
              @import "bourbon";

// variables - colors

$color-1: #3a393f; // dark purple 
$color-2: #eeecf5; // light purple
$color-3: #d26c64; // red
$color-4: #ffffff; // white
$background: darken($color-1, 5%); // body background color - visible when main element scales down

// variables - fonts 

$primary-font: 'Ubuntu', sans-serif;

// variables - z-index

$main-zindex: 1;
$nav-zindex: 3;
$shadow-zindex: 2;

// variables - nav

$menu-items-number: 5;

// mixins - rem fallback - credits: http://zerosixthree.se/

@function calculateRem($size) {
  $remSize: $size / 16px;
  @return $remSize * 1rem;
}

@mixin font-size($size) {
  font-size: $size;
  font-size: calculateRem($size);
}

// mixins - center vertically and/or horizontally an absolute positioned element

@mixin center($xy:xy) {
  @if $xy == xy {
    left: 50%;
    top: 50%;
    bottom: auto;
    right: auto;
    @include transform(translateX(-50%) translateY(-50%));
  }
  @else if $xy == x {
    left: 50%;
    right: auto;
    @include transform(translateX(-50%));
  }
  @else if $xy == y {
    top: 50%;
    bottom: auto;
    @include transform(translateY(-50%));
  }
}

// layout - breakpoints

$S:   320px;     
$M:   768px;     
$L:   1170px;     

// layout - media queries

@mixin MQ($canvas) {
  @if $canvas == S {
   @media only screen and (min-width: $S) { @content; } 
  }
  @else if $canvas == M {
   @media only screen and (min-width: $M) { @content; } 
  }
  @else if $canvas == L {
   @media only screen and (min-width: $L) { @content; } 
  }
}

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

Primary style

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

html * {
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
}

*, *:after, *:before {
	@include box-sizing(border-box);
}

html, body {
	/* important for the full-width image to work */
	height: 100%;
}

body {
	font: {
		size: 100%;
		family: $primary-font;
	}
	background-color: $background;
}

a {
	color: $color-4;
	text-decoration: none;
}

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

Modules - reusable parts of our design

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

.cd-container { /* this class is used to give a max-width to the element it is applied to, and center it horizontally when it reaches that max-width */
	width: 90%;
	max-width: $M; // breakpoints inside partials > _layout.scss
	margin: 0 auto;

	&::after { /* clearfix */
		content: '';
		display: table;
		clear: both;
	}
}

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

Main components 

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

#cd-main-content {
	position: relative;
	height: 100%;
	overflow: hidden;
	background-color: $color-1;

	/* slightly visible only when we resize this element */
	box-shadow: 0 0 40px rgba(#000, .8);

	z-index: $main-zindex;

	/* Force Hardware Acceleration in WebKit */
	-webkit-transform: translateZ(0);
	-webkit-backface-visibility: hidden;

	@include transition-property (transform);
	@include transition-duration(.5s);

	&.move-out {
		@include transform(scale(.6));
	}

	.no-js & {
		height: auto;
		overflow-x: auto;
		overflow-y: auto;
	}
}

#cd-intro {
	position: relative;
	height: 100%;
	background: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/148866/bg-img.jpg') no-repeat center center;
	background-size: cover;

	h1 {
		position: absolute;
		width: 90%;
		@include center; 
		text-align: center;
		@include font-size(18px);
		font-weight: bold;
		color: $color-4;
	}

	@include MQ(M) {
		h1 {
			@include font-size(26px);
		}
	}

	.no-js & {
		height: 640px;
	}
}

.cd-header {
	position: absolute;
	bottom: 0;
	left: 0;
	width: 100%;
	height: 50px;
	z-index: 2;
	background: rgba($color-1, .6);
	@include transition(background .2s);

	@include MQ(M) {
		height: 80px;
	}
}

.cd-blurred-bg {
	/* we use jQuery to apply a mask to this element - CSS clip property */
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	background: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/148866/bg-img.jpg') no-repeat center center;
	background-size: cover;
	-webkit-filter: blur(4px);
  filter: blur(4px);

	.no-js & {
		display: none;
	}
}

#cd-logo {
	position: absolute;
	left: 10px;
	top: 8px;

	width: 100px;
	height: 32px;

	img {
		display: block;
	}

	@include MQ(M) {
		left: 20px;
		top: 24px;
	}

	@include MQ(L) {
		left: 60px;
	}
}

.cd-menu-trigger {
	display: inline-block;
	position: absolute;
	right: 0;
	top: 0;
	height: 50px;
	line-height: 50px;
	padding: 0 .8em;
	text-transform: uppercase;
	font-weight: bold;
	@include font-size(14px);

	span {
		/* hamburger icon */
		position: relative;
		display: inline-block;
		width: 18px;
		height: 2px;
		background-color: $color-4;
		vertical-align: middle;
		margin-left: 10px;
		@include transform(translateY(-2px));

		&::before, &::after {
			content: '';
			display: inline-block;
			position: absolute;
			left: 0;
			width: 100%;
			height: 100%;
			background-color: inherit;

			@include transition(all .2s);
		}

		&::before {
			top: -6px;
		}

		&::after {
			bottom: -6px;
		}
	}

	.no-touch &:hover span::before {
		top: -8px;
	}

	.no-touch &:hover span::after {
		bottom: -8px;
	}

	@include MQ(M) {
		top: 16px;
		right: 10px;
		@include font-size(16px);
	}

	@include MQ(L) {
		right: 60px;
	}
}

#main-nav {
	position: fixed;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	background: $color-2;

	/* Force Hardware Acceleration in WebKit */
	-webkit-transform: translateZ(0);
	-webkit-backface-visibility: hidden;

	/* we move this element off the canvas */
	@include transform(translateY(-100%));	

	@include transition-property (transform);
	@include transition-duration(.5s);

	z-index: $nav-zindex;

	ul {
		height: 100%;
	}

	li {
		height: 100% / $menu-items-number; 

		a {
			position: relative;
			display: block;
			padding: 0 10%;
			height: 100%;
			border-bottom: 1px solid darken($color-2, 5%);
			color: $color-1;
			@include font-size(20px);
			font-weight: bold;

			span {
				position: absolute;
				@include center; 
			}

			.no-touch &:hover {
				background-color: #FFF;
			}
		}

		&:last-child a {
			border-bottom: none;
		}
	}

	.cd-close-menu {
		position: absolute;
		top: 0;
		right: 0;
		display: inline-block;
		width: 40px;
		height: 40px;
		background-color: $color-3;

		/* image replacement */
		overflow: hidden;
		text-indent: 100%;
		white-space: nowrap;

		&::before, &::after {
			content: '';
			display: inline-block;
			position: absolute;
			top: 18px;
			left: 10px;
			width: 20px;
			height: 3px;
			background-color: #FFF;

			@include transition-property (transform);
			@include transition-duration(.3s);
		}

		&::before {
			@include transform(rotate(45deg));
		}

		&::after {
			@include transform(rotate(135deg));
		}

		.no-touch &:hover {
			&::before {
				@include transform(rotate(225deg));
			}

			&::after {
				@include transform(rotate(315deg));
			}
		}
	}

	&.is-visible {
		box-shadow: 0 0 20px rgba(#000, .4);
		@include transform(translateY(0));
	}

	.no-js & {
		position: static;
		@include transform(translateY(0));

		.cd-close-menu {
			display: none;
		}
	}
}

.cd-shadow-layer {
	position: fixed;
	top: 0;
	left: 0;
	height: 100%;
	width: 100%;
	background: rgba(#000, .4);
	z-index: $shadow-zindex;
	opacity: 0;
	visibility: hidden;

	@include transition(visibility 0s .5s, opacity .5s 0s);

	&.is-visible {
		opacity: 1;
		visibility: visible;

		@include transition-delay(0s);
	}
}

            
          
!
            
              jQuery(document).ready(function($){
	//open menu
	$('.cd-menu-trigger').on('click', function(event){
		event.preventDefault();
		$('#cd-main-content').addClass('move-out');
		$('#main-nav').addClass('is-visible');
		$('.cd-shadow-layer').addClass('is-visible');
	});
	//close menu
	$('.cd-close-menu').on('click', function(event){
		event.preventDefault();
		$('#cd-main-content').removeClass('move-out');
		$('#main-nav').removeClass('is-visible');
		$('.cd-shadow-layer').removeClass('is-visible');
	});

	//clipped image - blur effect
	set_clip_property();
	$(window).on('resize', function(){
		set_clip_property();
	});

	function set_clip_property() {
		var $header_height = $('.cd-header').height(),
			$window_height = $(window).height(),
			$header_top = $window_height - $header_height,
			$window_width = $(window).width();
		$('.cd-blurred-bg').css('clip', 'rect('+$header_top+'px, '+$window_width+'px, '+$window_height+'px, 0px)');
	}
});
            
          
!
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