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CSS

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JavaScript

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HTML 

              
                header
	nav
		#brand
			#logo
			#word-mark
		#menu
			#menu-toggle
				#menu-icon
					.bar
					.bar
					.bar
			ul
				-for(i=0;i<4;i++)
					li
						a(href="#section0" + i)
	#hero-section
		#head-line
-for(i=0;i<4;i++)
	section(id='section0' + i)
		#heading
		
a(href="https://youtu.be/m1IU7zjl1k4")#youtube: i.fa.fa-youtube-play
!

CSS 

              
                /*** Mixins & Default Styles ***/
@mixin object($width, $height, $bg) {
	width: $width;
	height: $height;
	background: $bg;
}
@mixin transPos($top, $right, $bottom, $left,$transX,$transY) {
	position: absolute;
	top: $top;
	left: $left;
	right: $right;
	bottom: $bottom;
	transform: translate($transX, $transY);
}
* {
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}

body {
	overflow-x: hidden;
	overflow-y: scroll;
}

/*** Color Variables ***/
$header-bg: #5661f2;
$nav-bg: #46b2f0;
$pink: #fa6c98;
$aqua: #79edfc;
$accent: #fff;

/*** Centering Hack ***/
@mixin center {
	display: flex;
	justify-content: center;
	align-items: center;
}

/*** Header Styles ***/
header {
	@include object(100vw,100vh,$header-bg);
	display: flex;
}

/*** Navigation Styles ***/
nav {
	@include object(100vw,160px,$nav-bg);
	display: grid;
	grid-template-columns: 1fr 1fr;
	position: fixed;
	z-index: 10;
	transition: all 0.3s;
	&.navShadow {
		box-shadow: 0 4px 30px -5px rgba(#000, 0.2);
		height: 100px;
		#word-mark {
			opacity: 0;
		}
	}
}

#brand,
#menu,
ul {
	display: flex;
	align-items: center;
}

#brand {
	padding-left: 40px;
}

#logo {
	@include object(55px,55px,$accent);
	border-radius: 50%;
	cursor: pointer;
}

#word-mark {
	@include object(120px,20px,$accent);
	border-radius: 90px;
	margin-left: 20px;
	opacity: 1;
	transition: all 0.3s;
}

/*** Menu Styles ***/
#menu {
	justify-content: flex-end;
	padding-right: 40px;
}

li {
	margin-left: 20px;
	a {
		@include object(80px,20px,$accent);
		display: block;
		border-radius: 90px;
	}
}

#menu-toggle {
	@include object(55px,55px,darken($nav-bg,5%));
	@include center;
	border-radius: 50%;
	cursor: pointer;
	display: none;
	&:hover .bar {
		width: 25px;
	}
	&.closeMenu {
		.bar {
			width: 25px;
			&:first-child {
				transform: translateY(7px) rotate(45deg);
			}
			&:nth-child(2) {
				transform: scale(0);
			}
			&:last-child {
				transform: translateY(-7px) rotate(-45deg);
			}
		}
	}
}

.bar {
	@include object(25px,2px,$accent);
	transition: 0.3s ease-in-out;
	&:nth-child(2) {
		width: 20px;
		margin: 5px 0;
	}
	&:last-child {
		width: 15px;
	}
}

/*** Hero Section Styles ***/
#hero-section {
	@include object(100vw,calc(100vh - 160px),null);
	@include center;
	margin-top: 160px;
}

#head-line {
	@include object(520px,30px,$accent);
	border-radius: 90px;
	position: relative;
	&:before,
	&:after {
		content: "";
		height: 30px;
		border-radius: 90px;
	}
	&:before {
		@include object(360px,null,$accent);
		@include transPos(-60px,null,null,50%,-50%,0);
	}
	&:after {
		@include object(200px,null,$accent);
		@include transPos(null,null,-60px,50%,-50%,0);
	}
}

/*** Section Styles ***/
section {
	@include object(100vw,calc(100vh - 100px),null);
	display: flex;
	justify-content: center;
	&:nth-child(odd) {
		background: $pink;
	}
	&:nth-child(even) {
		background: $aqua;
	}
}

#heading {
	@include object(120px,20px,$accent);
	border-radius: 90px;
	margin-top: 40px;
}

/*** Responsive Menu For Smaller Device ***/

@media screen and (max-width: 767px) {
	#menu-toggle {
		display: flex;
	}
	ul {
		display: inline-block;
		@include object(100vw,0,$aqua);
		@include transPos(160px,null,null,null,null,null);
		box-shadow: 0 5px 30px -4px rgba(#000, 0.2);
		transition: all 0.3s;
		&.showMenu {
			height: 250px;
			li {
				height: 80px;
				opacity: 1;
				visibility: visible;
			}
		}
	}
	li {
		@include object(50%,80px,null);
		float: left;
		padding-left: 40px;
		opacity: 0;
		visibility: hidden;
		margin-left: 0;
		transition: all 0.3s 0.1s;
		&:first-child,
		&:nth-child(2) {
			margin-top: 80px;
		}
	}
	#head-line {
		transform: scale(0.8);
	}
}

#youtube {
	position: fixed;
	right: 2vw;
	bottom: 2vh;
	font-size: 30px;
	color: #fff;
}
!

JS 

              
                $( () => {
	
	//On Scroll Functionality
	$(window).scroll( () => {
		var windowTop = $(window).scrollTop();
		windowTop > 100 ? $('nav').addClass('navShadow') : $('nav').removeClass('navShadow');
		windowTop > 100 ? $('ul').css('top','100px') : $('ul').css('top','160px');
	});
	
	//Click Logo To Scroll To Top
	$('#logo').on('click', () => {
		$('html,body').animate({
			scrollTop: 0
		},500);
	});
	
	//Smooth Scrolling Using Navigation Menu
	$('a[href*="#"]').on('click', function(e){
		$('html,body').animate({
			scrollTop: $($(this).attr('href')).offset().top - 100
		},500);
		e.preventDefault();
	});
	
	//Toggle Menu
	$('#menu-toggle').on('click', () => {
		$('#menu-toggle').toggleClass('closeMenu');
		$('ul').toggleClass('showMenu');
		
		$('li').on('click', () => {
			$('ul').removeClass('showMenu');
			$('#menu-toggle').removeClass('closeMenu');
		});
	});
	
});
!
999px

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