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html

css

@import url("https://fonts.googleapis.com/css?family=Exo:700");

/*CLEARFIX*/
.clearfix:after {content: ".";	display: block;	clear: both; visibility: hidden; line-height: 0; height: 0;} 
.clearfix {	display: inline-block;} 
html[xmlns] .clearfix {display: block;} 
* html .clearfix {height: 1%;}

/*CSS RESET*/
html,body,div,span,applet,object,iframe,
h1,h2,h3,h4,h5,h6,p,blockquote,pre,
a,abbr,acronym,address,big,cite,code,
del,dfn,em,img,ins,kbd,q,s,samp,
small,strike,strong,sub,sup,tt,var,
b,u,i,center,
dl,dt,dd,ol,ul,li,
fieldset,form,label,legend,
table,caption,tbody,tfoot,thead,tr,th,td,
article,aside,canvas,details,embed,
figure,figcaption,footer,header,hgroup,
menu,nav,output,ruby,section,summary,
time,mark,audio,video{margin:0;padding:0;border:0;font-size:100%;font:inherit;vertical-align:baseline;}

/* HTML5 display-role reset for older browsers */
article,aside,details,figcaption,figure,
footer,header,hgroup,menu,nav,section{display:block;}
body{line-height:1;}
ol,ul{list-style:none;}
blockquote,q{quotes:none;}
blockquote:before,blockquote:after,
q:before,q:after{content:'';content:none;}
table{border-collapse:collapse;border-spacing:0;}

/*GLOBALS*/
a{text-decoration:none;	}
body, hmtl{background: #444; font-family: 'Exo', sans-serif;}

/*NAV*/
#nav-wrap{
	background-color:#555;
	box-shadow:0px 1px 5px rgba(0,0,0,0.4);
	height:60px;
	position:fixed;
	top:0;
	left:0;
	width:100%;
	z-index:100;
}

#nav{
	height:60px;
	width:600px;
	margin: 0 auto;
}

#nav ul{position:relative;}
#nav-indicator{
	position:absolute;
	width:100px;
	top:55px;
	left:0;
	height:5px;
	background:#f36666;	
	
	-webkit-transition: all 0.2s ease;
	-moz-transition:    all 0.2s ease;
	-o-transition:      all 0.2s ease;
	-ms-transition:     all 0.2s ease;
	transition:         all 0.2s ease;
}

.nav-btn{
	width:99px;
	float:left;
	padding:24px 0;
	list-style:none;
	color:#fff;
	text-align:center;
	cursor:pointer;
	text-transform:uppercase;
	font-size:12px;
	color:#ccc;
	
	border-left:1px solid rgba(255,255,255,0.2);
	box-shadow: inset 1px 1px 0 rgba(0,0,0,0.5) ;
	
	text-shadow:rgba(0,0,0,0.8) 1px 1px 0px;
}

.nav-btn:first-child{
	border:none;
	box-shadow: none;
}

.nav-btn:hover, .nav-btn.active {
	color:#FFF;
	background:#444;
	box-shadow: inset 0px 1px 3px rgba(0,0,0,0.5) ;
}

/*CONTENT*/
#content-wrap{
	width:600px;
	margin:100px auto 180px;
}
h1, h2{
	color:#ccc;
	text-shadow:rgba(0,0,0,0.8) 1px 1px 1px;
	text-align:center;	
	
	-webkit-transition: all 0.5s ease;
	-moz-transition:    all 0.5s ease;
	-o-transition:      all 0.5s ease;
	-ms-transition:     all 0.5s ease;
	transition:         all 0.5s ease;	
}

h1{	font-size:36px;}
h2{font-size:16px;	margin:15px 0 40px;	}

.row{
	width:94%;
	padding:30px 3%;
	font-size:18px;
	color:#999;
	border-bottom:1px solid rgba(255,255,255,0.2);
	box-shadow: inset 0 1px 0 rgba(0,0,0,0.5) ;
	background:#333;
	position:relative;
	text-shadow:rgba(0,0,0,0.8) 1px 1px 1px;
}

.row.active, h2 span{color:#f36666;}
.row.active{background:#3c3c3c;}
.row span{text-decoration:line-through;}

.row-btn{
	position:absolute;
	top:25px;
	right:20px;
	background:#2b2b2b;
	border-bottom:1px solid rgba(255,255,255,0.2);
	box-shadow: inset 0 1px 0 rgba(0,0,0,0.5) ;
	width:40px;
	height:20px;
	border-radius:20px;
}

.circle{
	border-radius:50%;
	background:#555;
	border-top:1px solid rgba(255,255,255,0.2);
	box-shadow: 0 1px 0 rgba(0,0,0,0.5) ;
	width:20px;
	height:20px;
	
	
}

.row.active .row-btn{	background:#f36666;}
.row.active .circle{	margin-left:20px;}

#top{
	width:40px;
	height:20px;
	background:#555;
	border-top:1px solid rgba(255,255,255,0.2);
	box-shadow: 0 1px 0 rgba(0,0,0,0.5) ;
	margin:30px auto;
	cursor:pointer;	
	color:#ccc;
	text-shadow:rgba(0,0,0,0.8) 1px 1px 1px;
	text-align:center;
	padding:15px;
}

#top:active{
	background:#333;
	border-bottom:1px solid rgba(255,255,255,0.2);
	box-shadow: inset 0 1px 0 rgba(0,0,0,0.5) ;	
	border-top:none;
}

/*ANIMATION*/
.row-btn, .circle, .row{
	-webkit-transition: all 0.1s ease;
	-moz-transition:    all 0.1s ease;
	-o-transition:      all 0.1s ease;
	-ms-transition:     all 0.1s ease;
	transition:         all 0.1s ease;	
}

/*hide left*/
h1{
	-moz-transform: translateX(-200px);
	-webkit-transform: translateX(-200px);
	-o-transform: translateX(-200px);
	-ms-transform: translateX(-200px);
	transform: translateX(-200px);
	opacity:0;
}

/*hide right*/
h2{
	-moz-transform: translateX(200px);
	-webkit-transform: translateX(200px);
	-o-transform: translateX(200px);
	-ms-transform: translateX(200px);
	transform: translateX(200px);	
	opacity:0;
}

/*Slide left > right || right > left*/
h1.animationActive, h2.animationActive {
	-moz-transform: translateX(0px);
	-webkit-transform: translateX(0px);
	-o-transform: translateX(0px);
	-ms-transform: translateX(0px);
	transform: translateX(0px);	
	opacity:1;
}

JavaScript

/******************************
	 ADD ANIMATION TO THE TEXT 
	******************************/
	var count = 0;
	var number = 10;
	
	var interval = setInterval(function(){
       count++;
	   if (count === number) { 
	   		clearInterval(interval);
			$('h1 ,h2').addClass('animationActive');		
		}
	}, 50);
	
	
	
	/*********************
	 SET ROW'S HEIGHT
	*********************/
	$.each($('.row'), function() { 
	   var h = $(this).attr("data-height");
	   $(this).css("height",h);
	});
	
	
	
	/*************************
	 ON WINDOW SCROLL FUNCTION
	*************************/
	var sectionIds = {};

$(".row-nav").each(function(){	
		var $this = $(this);			
		sectionIds[$this.attr("id")] = $this.first().offset().top -120;	
	});			
	
	
	var count2 = 0;
	$(window).scroll(function(event){

var scrolled = $(this).scrollTop();

//If it reaches the top of the row, add an active class to it
		$(".row-nav").each(function(){
			
			var $this = $(this);
			
			if(scrolled >= $this.first().offset().top -120){
				$(".row-nav").removeClass("active");
				$this.addClass("active");	
				
				$(".animation").removeClass('animationActive');
				$this.find(".animation").addClass('animationActive');
						
			}
		});
		
		//when reaches the row, also add a class to the navigation
		for (key in sectionIds){
			if (scrolled >= sectionIds[key]){
				$(".nav-btn").removeClass("active");
				var c = $("[data-row-id="+key+"]");
				c.addClass("active");
				
				var i = c.index();
				$('#nav-indicator').css('left', i*100 + 'px');							
			}
		}	
		
		
		//Check if we've reached the top
	    if (scrolled > count2){  count2++;  } 
		else { count2--; }
	    
		count2 = scrolled;		
		
		if(count2 == 0){
			$('h1 ,h2').addClass('animationActive');
		}else{
			$('h1 ,h2').removeClass('animationActive');
		}
	
	});
	
	
	
	/**************
	 IN-NAVIGATION
	**************/
	$(".nav-btn").click(function(){		
		$(this).addClass("active");
		$(this).siblings().removeClass("active");
		
		var i = $(this).index();
		$('#nav-indicator').css('left', i*100 + 'px');			
		
		var name = $(this).attr("data-row-id");
		var id = "#" + name;
		var top = $(id).first().offset().top -60;			
		$('html, body').animate({scrollTop: top+'px'}, 300);
		
	});
	
	
	
	/*****
	 TOP
	******/
	$('#top').click(function(){
		$('html, body').animate({scrollTop: '0px'}, 300);
    });

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