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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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CSS

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CSS Base

About CSS Base

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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-.

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HTML 

              
                
<body>

	<a id="button"></a>
  
	<header>
		<div class="introduction">
			<div class="line">
				<span class="line-number">1</span>
				<span class="line-content">Hello</span>
			</div>
			<div class="line">
				<span class="line-number">2</span>
				<span class="line-content">I am <mark>Nadine Jackson</mark></span>
			</div>
			<div class="line">
				<span class="line-number">3</span>
				<span class="line-content">a <mark>Software Engineer</mark></span>
			</div>
			<div class="empty-line">
				<div class="line-number line-number-a">4</div>
				<div class="line-number line-number-b">5</div>
			</div>
	
			<a class="link mouse_scroll" data-scroll="topmain" href="#">
				<div>
					<span class="m_scroll_arrows unu"></span>
					<span class="m_scroll_arrows doi"></span>
					<span class="m_scroll_arrows trei"></span>
				</div>
			</a>
		</div>
	</header>
	
	<span class="position-absolute trigger">
		<!-- hidden trigger to apply 'stuck' styles --></span>
	<nav class="navbar navbar-expand-sm bg-dark navbar-dark sticky-top">
		<div id="topmain"></div>
		<div class="container">
			<a class="navbar-brand link" data-scroll="top" href="#">
				<img src="https://github.com/NadineJackson1/portfolio/blob/main/Logopic1.png?raw=true" width="30" height="30" class="d-inline-block align-top" alt="Nadine Jackson profileicon">
				Nadine Jackson
			</a>
			<button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbar">
				<span class="navbar-toggler-icon"></span>
			</button>
			<div class="collapse navbar-collapse" id="navbar">
				<ul class="navbar-nav">
					<li class="nav-item">
						<a href="#" class="link nav-link" data-scroll="work"><i class="fas fa-briefcase"></i> Work</a>
					</li>
					<li class="nav-item dropdown ">
						<a href="#" class="link nav-link" data-scroll="languagesProgramming"><i class="fas fa-code"></i> Skills</a>
					</li>
					<li class="nav-item">
						<a href="#" class="link nav-link" data-scroll="contact-me"><i class="fas fa-id-card"></i> Contact Me</a>
					</li>
					<li class="nav-item">
						<a href="https://drive.google.com/file/d/1P8ZzlwjHG9vlAJNRd__bRFPr3bJ8IrT8/view" class="nav-link" target="__blank"><i class="fas fa-file-pdf"></i> Resume</a>
					</li>
				</ul>
				<ul class="navbar-nav ml-auto">
					<li class="nav-item active">
						<a class="nav-link" href="#"></a>
					</li>
				</ul>
			</div>
		</div>
	</nav>
	
	<div class="container">
	
		<div class="row" id="work">
	
			<div class="col-lg-12">
				<div class="display-1 text-center title-section">Works</div>
	
				<ul class="filters text-center">
					<li class="active" data-filter="*"><a href="#!"><i class="fas fa-star-of-life"></i> All</a></li>
					<!-- hidden until apps are completed 
					<li data-filter=".desktop"><a href="#!"><i class="fas fa-laptop-code"></i> Desktop</a></li>
					-->
					<li data-filter=".Web"><a href="#!"><i class="fas fa-globe"></i> Web</a></li>
					<li data-filter=".design"><a href="#!"><i class="far fa-object-group"></i> Design</a></li>
				</ul>
	
				<div class="projects">
	
					<div class="row">
	
						<div class="col-lg-4 item Web html css jquery design">
	
							<div class="project">
	
								<div class="project-head">
									<img src="https://repository-images.githubusercontent.com/476597278/94153b75-ca18-4860-b887-f3dad07212a5" alt="" class="img-fluid card-img">
									<div class="project-overlay">
										<h3>This Portfolio</h3>
									</div>
									<div class="project-hover">
										<p>Responsive site with custom logo, parallax scrolling and overlays. Made with HTML5, CSS, JS & Adobe.</p>
									</div>
								</div>
	
								<div class="project-body text-center">
									<h3 class="title">Web</h3>
	
									<ul class="filters filters-tag text-center">
										tag:
										<li data-filter=".html"><a href="#!">HTML</a></li>
										<li data-filter=".css"><a href="#!">CSS</a></li>
										<li data-filter=".javascript"><a href="#!">JavaScript</a></li>
										<li data-filter=".psd"><a href="#!">PSD</a></li>
									</ul>
	
									<div class="btn-group" role="group">
										<a href="https://drive.google.com/file/d/1P8ZzlwjHG9vlAJNRd__bRFPr3bJ8IrT8/view" class="btn project-btn"><i class="fas fa-file-pdf"></i> Resume</a>
										<a href="https://codepen.io/nadinejackson/pen/oNEbjxg" class="btn project-btn"><i class="far fa-eye"></i> View</a>
									</div>
								</div>
	
							</div>
	
						</div>
	
						<div class="col-lg-4 item Web html css jquery design">
	
							<div class="project">
	
								<div class="project-head">
									<img src="https://repository-images.githubusercontent.com/489555252/2681a01d-78b5-43e2-9ef9-9c1b3b8bdb9a" alt="" class="img-fluid card-img">
									<div class="project-overlay">
										<h2>Level Ground Gym</h2>
									</div>
									<div class="project-hover">
										<p>Responsive site designed with custom logo and branding. Made with HTML5 and CSS.</p>
									</div>
								</div>
	
								<div class="project-body text-center">
									<h3 class="title">Web</h3>
	
									<ul class="filters filters-tag text-center">
										tag:
										<li data-filter=".html"><a href="#!">HTML</a></li>
										<li data-filter=".css"><a href="#!">CSS</a></li>
										<li data-filter=".psd"><a href="#!">PSD</a></li>
									</ul>
	
									<div class="btn-group" role="group">
										<a href="https://github.com/NadineJackson1/levelGroundWomensGym" class="btn  project-btn"><i class="fas fa-code"></i> Code</a>
										<a href="https://codepen.io/nadinejackson/pen/bGLENay" class="btn  project-btn"><i class="far fa-eye"></i> View</a>
									</div>
								</div>
	
							</div>
	
						</div>
	
						<div class="col-lg-4 item design psd">
	
							<div class="project">
	
								<div class="project-head">
									<img src="https://repository-images.githubusercontent.com/490130368/d99fb8b2-9828-46ae-8385-de2984cadc94" alt="" class="img-fluid card-img">
									<div class="project-overlay">
										<h4>Bound Together Bookshop</h4>
									</div>
									<div class="project-hover">
										<p>Clean, responsive site designed with custom logo and branding. Made with HTML5, CSS and Adobe.</p>
									</div>
								</div>
	
								<div class="project-body text-center">
									<h3 class="title">Design</h3>
	
									<ul class="filters filters-tag text-center">
										tag:
										<li data-filter=".html"><a href="#!">HTML</a></li>
										<li data-filter=".css"><a href="#!">CSS</a></li>
										<li data-filter=".psd"><a href="#!">PSD</a></li>
									</ul>
	
									<div class="btn-group" role="group">
										<a href="https://github.com/NadineJackson1/boundTogether" class="btn  project-btn"><i class="fas fa-code"></i> Code</a>
										<a href="https://codepen.io/nadinejackson/pen/ExQPBQz/063aace3bc9de122aab09116e4832e87" class="btn  project-btn"><i class="far fa-eye"></i> View</a>
									</div>
								</div>
	
							</div>
	
						</div>
	
						<div class="col-lg-4 item Web html css">
	
							<div class="project">
	
								<div class="project-head">
									<img src="https://repository-images.githubusercontent.com/476527707/cb70350d-44c1-481c-a25e-fcf4728b7390" alt="" class="img-fluid card-img">
									<div class="project-overlay">
										<h4>Celebrity Chef Recipes</h4>
									</div>
									<div class="project-hover">
										<p>Multi-page site made with HTML and CSS.</p>
									</div>
								</div>
	
								<div class="project-body text-center">
									<h3 class="title">Web</h3>
	
									<ul class="filters filters-tag text-center">
										tag:
										<li data-filter=".html"><a href="#!">HTML</a></li>
										<li data-filter=".css"><a href="#!">CSS</a></li>
									</ul>
	
									<div class="btn-group" role="group">
										<a href="https://github.com/NadineJackson1/saveYourFork" class="btn  project-btn"><i class="fas fa-code"></i> Code</a>
										<a href="https://codepen.io/nadinejackson/project/editor/DBnNOz" class="btn  project-btn"><i class="far fa-eye"></i> View</a>
									</div>
								</div>
	
							</div>
	
						</div>
	
						<div class="col-lg-4 item design psd">
	
							<div class="project">
	
								<div class="project-head">
									<img src="https://repository-images.githubusercontent.com/489870358/9a4a163f-ba0c-46ca-8885-719d50fbf60f" alt="" class="img-fluid card-img">
									<div class="project-overlay">
										<h2>Young's Wedding</h2>
									</div>
									<div class="project-hover">
										<p>Responsive landing page with custom photo design, logo and branding. Made with HTML5, CSS and Adobe.</p>
									</div>
								</div>
	
								<div class="project-body text-center">
									<h3 class="title">Design</h3>
	
									<ul class="filters filters-tag text-center">
										tag:
										<li data-filter=".html"><a href="#!">HTML</a></li>
										<li data-filter=".css"><a href="#!">CSS</a></li>
										<li data-filter=".psd"><a href="#!">PSD</a></li>
									</ul>
	
									<div class="btn-group" role="group">
										<a href="https://github.com/NadineJackson1/foreverYoungsWedding" class="btn  project-btn"><i class="fas fa-code"></i> Code</a>
										<a href="https://codepen.io/nadinejackson/pen/PoQZQXZ" class="btn  project-btn"><i class="far fa-eye"></i> View</a>
									</div>
								</div>
	
							</div>
	
						</div>
	
						<div class="col-lg-4 item Web html css javascript">
	
							<div class="project">
	
								<div class="project-head">
									<img src="https://repository-images.githubusercontent.com/490073192/bfaf08b4-85fa-4a1c-a234-cbb1489664e7" alt="" class="img-fluid card-img">
									<div class="project-overlay">
										<h3>Alek Design Agency</h3>
									</div>
									<div class="project-hover">
										<p>Clean, responsive site with parallax scrolling, custom photo design, logo and branding. Made with HTML5, CSS, Javascript and Adobe.</p>
									</div>
								</div>
	
								<div class="project-body text-center">
									<h3 class="title">Web</h3>
	
									<ul class="filters filters-tag text-center">
										tag:
										<li data-filter=".html"><a href="#!">HTML</a></li>
										<li data-filter=".css"><a href="#!">CSS</a></li>
										<li data-filter=".javascript"><a href="#!">JavaScript</a></li>
										<li data-filter=".psd"><a href="#!">PSD</a></li>
									</ul>
	
									<div class="btn-group" role="group">
										<a href="https://github.com/NadineJackson1/alek" class="btn  project-btn"><i class="fas fa-code"></i> Code</a>
										<a href="https://codepen.io/nadinejackson/pen/MWQKxbX" class="btn  project-btn"><i class="far fa-eye"></i> View</a>
									</div>
								</div>
	
							</div>
	
						</div>
	
					</div>
	
				</div>
	
			</div>
	
		</div><!-- end work -->
	
		<div class="col-lg-12 text-center">
			<div id="languagesProgramming"></div>
	
			<div class="display-1 title-section">Skills</div>
			<div class="display-4">Programming Languages</div><br>
	
			<div class="row skills-cont">
				<div class="col-md-6 skill">
					<p class="h1">Web</p>
					
	
					<p class="h3">Front-end | Back-end | UI/UX</p><br>
					<ul class="list-unstyled">
						<li class="list-inline-item "><i class="devicon-javascript-plain colored" style="font-size: 60px;"></i><br>JavaScript</li>
						<li class="list-inline-item text-center"><i class="devicon-jquery-plain colored" style="font-size: 60px;"></i><br>jQuery</li>
						<li class="list-inline-item text-center"><i class="devicon-git-plain colored" style="font-size: 60px;"></i><br>Git</li>
						<li class="list-inline-item text-center"><i class="devicon-css3-plain colored" style="font-size: 60px;"></i><br>CSS</li>
						<li class="list-inline-item text-center"><i class="devicon-html5-plain colored" style="font-size: 60px;"></i><br>HTML</li>
						<li class="list-inline-item text-center"><i class="devicon-bootstrap-plain colored" style="font-size: 60px;"></i><br>BootStrap</li>
						<li class="list-inline-item text-center"><i class="devicon-photoshop-line colored" style="font-size: 60px;"></i><br>Photoshop</li>
						<li class="list-inline-item text-center"><i class="devicon-nodejs-plain colored" style="font-size: 60px;"></i><br>Nodejs</li>
						<li class="list-inline-item text-center"><i class="devicon-php-plain colored" style="font-size: 60px;"></i><br>PHP</li>
						<li class="list-inline-item text-center"><i class="devicon-csharp-plain colored" style="font-size: 60px;"></i><br>C#</li>
						<li class="list-inline-item text-center"><i class="devicon-github-plain colored" style="font-size: 60px;"></i><br>GitHub</li>
	
	
	
					</ul>
	
				</div>
				<div class="col-md-5  mx-auto">
					<div class="row">
						<div class="col-sm-12 skill">
							<p class="h1">Cloud</p>
							<ul class="list-unstyled">
								<li class="list-inline-item text-center"><i class="devicon-amazonwebservices-original colored" style="font-size: 60px;"></i><br>AWS</li>
								<li class="list-inline-item text-center"><i class="devicon-azure-plain colored" style="font-size: 60px;"></i><br>Azure</li>
	
							</ul>
	
						</div>
						<div class="col-sm-12 skill">
							<p class="h1">Database</p>
							<ul class="list-unstyled">
								<li class="list-inline-item text-center"><i class="devicon-oracle-original colored" style="font-size: 60px;"></i><br>Oracle</li>
								<li class="list-inline-item text-center"><i class="devicon-mysql-plain colored" style="font-size: 60px;"></i><br>MySQL</li>
								<li class="list-inline-item text-center"><i class="devicon-postgresql-plain colored" style="font-size: 60px;"></i><br>PostgreSQL</li>
								<li class="list-inline-item text-center"><i class="devicon-mongodb-plain colored" style="font-size: 60px;"></i><br>MongoDB</li>
	
							</ul>
	
						</div>
					</div>
				</div>
			</div>
		</div>
	</div>
	<br><br><br><br><br>
	<!-- end container -->
	
	<footer class="footer">
	
		<div class="container px-lg-5 text-center footer-content">
			<div class="row mx-lg-n5">
				<div class="col py-3 px-lg-5">
					<div class="display-4 text-center title-section" id="contact-me">Work Together</div>
	
					<div class="container">
						<a href="https://nadinejackson.com/"><i class="fas fa-globe"></i> WebSite</a>
						<a href="https://www.linkedin.com/in/NadineJackson1" target="__blank"><i class="fab fa-linkedin"></i> linkedin</a>
						<a href="https://github.com/NadineJackson1" target="__blank"><i class="fab fa-github-square"></i> github</a>
						<a href="https://codepen.io/NadineJackson1" target="__blank"><i class="fab fa-codepen"></i> codepen</a><br>
						<br><a href="tel:7207777777">(720)777-7777</a>
					</div>
	
				</div>
			</div>
		</div>
	
		<div class="copyright">
			Design by Nadine Jackson | 2022
			<script>
				new Date().getFullYear() > 2022 && document.write(" - " + new Date().getFullYear());
	
			</script>
		</div>
	
	</footer>

    
</body>
!

CSS 

              
                /*
Theme Name: myPortfolio 1.0
Theme URL:  http://www.nadinejackson1.com
Author: Nadine Jackson
Author URL: http://www.nadinejackson1.github.io
Template: CP11
Description: myPortfolio Theme
Version: 1.00
*/

@import url("https://fonts.googleapis.com/css?family=Source+Code+Pro:300,400,500");

html,
body {
    margin: 0;
    padding: 0;
}

ul.filters {
    display: block;
    width: 100%;
    margin: 0;
    padding: 30px 0;
}

ul.filters > li {
    list-style: none;
    display: inline-block;
}

ul.filters > li > a {
    display: block;
    color: #000000;
    text-decoration: none;
    padding: 5px 20px;
}

ul.filters > li > a:hover {
    background-color: #e6e9ed;
}

ul.filters > li.active > a {
    color: #ffbb00;
    background-color: rgba(23, 182, 255, 0);
}

.project {
    position: relative;
    margin-bottom: 50px;
    color: #000;
    border-radius: 0;
    border: 1px solid #eee;
    background-color: #fff;
    box-shadow: 1px 1px 1.5px rgba(0, 0, 0, 0.075);
}

.project-head {
    position: relative;
    overflow: hidden;
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 9;
    background-color: rgba(67, 94, 81, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    -webkit-transition: ease-in-out 0.2s;
    -moz-transition: ease-in-out 0.2s;
    -ms-transition: ease-in-out 0.2s;
    transition: ease-in-out 0.2s;
}

.project-hover {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #ffbb00;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    flex-direction: column;
    box-sizing: border-box;
    padding: 30px;
    -webkit-transition: ease-in-out 0.2s;
    -moz-transition: ease-in-out 0.2s;
    -ms-transition: ease-in-out 0.2s;
    transition: ease-in-out 0.2s;
}

.project-body {
    padding-top: 10px;
    padding-bottom: 10px;
}

h4.title {
    color: #434e5e;
    font-size: 1.2rem;
    margin-bottom: 0;
}

.project-btn {
    margin-bottom: -40px;
    font-size: 0.9rem;
    background-color: #fff;
    color: #222;
    border: 1px solid #eee;
    border-radius: 0;
    width: 120px;
    box-shadow: 1px 1px 1.5px rgba(0, 0, 0, 0.075);
}

.project-btn:hover {
    background-color: #ffbb00;
    color: #fff;
}



* {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: 'Source Code Pro', monospace;
    background-color: #EEEEEE;
}

header {
    height: 100vh;
    background-color: #ffbb00;
    color: #F5F5F5;
}

header > div {
    max-width: 650px;
    padding-top: 50vh;
    margin: 0 auto;
}

.introduction {
    font-size: 20px;
    line-height: 1.67;
    letter-spacing: 0.7px;
    padding-left: 5%;
    padding-right: 5%;
}

.line {
    display: flex;
    flex-direction: row;
    justify-content: flex-start;
    align-items: flex-start;
}

.line-number {
    width: 14px;
    margin-right: 1.5rem;
    opacity: 0.33;
    user-select: none;
}

.line-content,
.line-content mark {
    font-size: 25px;
    line-height: 30px;
    letter-spacing: 4px;
    opacity: 85%;
}

.line-content mark {
    letter-spacing: 4px;
}

.empty-line {
    background: linear-gradient(to bottom, #ffbb00, #ffbb00);
}

.empty-line .line-number {
    display: block;
}

.empty-line .line-number-a {
    opacity: 0.15;
}

.empty-line .line-number-b {
    opacity: 0.1;
}

mark {
    background: transparent;
    color: rgb(2, 0, 5);
}

.title-section {
    margin: 0.5em 0;
}

/*.link {
    position: absolute;
    letter-spacing: 9px;
    right: 4.8%;
}
.link-work {
    top: 12.1%;
}*/

/*.link-contact-me{
    top: 17.1%;
}

.link-resume{
    position: absolute;
    letter-spacing: 9px;
    right: 4.8%;
    top: 22.1%;
}
*/
a {
    color: #ffffff;
    text-decoration: none;
}

a:hover {
    color: rgb(1, 0, 2);
    text-decoration: none;
}

#button {
    display: inline-block;
    background-color: rgba(28, 61, 33, 0.623);
    width: 50px;
    height: 50px;
    text-align: center;
    border-radius: 4px;
    position: fixed;
    bottom: 30px;
    right: 30px;
    transition: background-color .3s,
        opacity .5s, visibility .5s;
    opacity: 0;
    visibility: hidden;
    z-index: 1000;
}

#button::after {
    content: "\f077";
    font-family: FontAwesome;
    font-weight: normal;
    font-style: normal;
    font-size: 2em;
    line-height: 50px;
    color: #fff;
}

#button:hover {
    cursor: pointer;
    background-color: #ffbb00;
}

#button:active {
    background-color: #ffbb00;
}

#button.show {
    opacity: 1;
    visibility: visible;
}

.footer {
    height: 100%;
    padding: 10vh;
    background-color: #ffbb00;
    color: #F5F5F5;
}

.copyright {
    color: #787878;
    letter-spacing: 4px;
    text-align: center;
}

.footer-content {
    padding-bottom: 5vh;
}

.filters.filters-tag {
    display: inline-block;
    padding: .25em .4em;
    font-size: 75%;
    line-height: 1;
    text-align: center;
}

ul.filters.filters-tag > li > a {
    display: block;
    color: #434e5e;
    border-radius: .25rem;
    padding: 0.3rem 0.6rem;
}

ul.filters.filters-tag > li.active > a {
    color: #fff;
    background-color: #ffbb00;
}

.filters-tag {
    font-size: 0.9rem;
}

.bg-dark {
    background-color: #ffbb00 !important;
}

.navbar .dropdown-menu , .navbar .dropdown.show a , .dropdown-item{
    background-color: #ffbb00 !important;
    
    color: rgb(255, 255, 255);;
}

.sticky-top {
    transition: all 0.25s ease-in;
}

/* style for when sitcky is applied */
.stuck .sticky-top {
    background-color: #ffbb00 !important;
}

.navbar-brand {
    color: rgb(255, 255, 255) !important;
    font-size: 1.3em;
}

.mouse_scroll {
    display: block;
    margin: 0 auto;
    width: 24px;
    height: 100px;
    margin-top: 90px;
}



.m_scroll_arrows {
    display: block;
    width: 5px;
    height: 5px;
    -ms-transform: rotate(45deg);
    /* IE 9 */
    -webkit-transform: rotate(45deg);
    /* Chrome, Safari, Opera */
    transform: rotate(45deg);

    border-right: 2px solid white;
    border-bottom: 2px solid white;
    margin: 0 0 3px 4px;

    width: 16px;
    height: 16px;
}


.unu {
    margin-top: 1px;
}

.unu,
.doi,
.trei {
    -webkit-animation: mouse-scroll 1s infinite;
    -moz-animation: mouse-scroll 1s infinite;
    animation: mouse-scroll 1s infinite;

}

.unu {
    -webkit-animation-delay: .1s;
    -moz-animation-delay: .1s;
    -webkit-animation-direction: alternate;

    animation-direction: alternate;
    animation-delay: alternate;
}

.doi {
    border-right-color: rgb(17, 1, 1) !important;
    border-bottom-color: rgb(26, 1, 1) !important;
    -webkit-animation-delay: .2s;
    -moz-animation-delay: .2s;
    -webkit-animation-direction: alternate;

    animation-delay: .2s;
    animation-direction: alternate;

    margin-top: -6px;
}

.trei {
    -webkit-animation-delay: .3s;
    -moz-animation-delay: .3s;
    -webkit-animation-direction: alternate;

    animation-delay: .3s;
    animation-direction: alternate;


    margin-top: -6px;
}

.mouse {
    height: 42px;
    width: 24px;
    border-radius: 14px;
    transform: none;
    border: 2px solid white;
    top: 170px;
}

@-webkit-keyframes mouse-scroll {

    0% {opacity: 0;}

    50% {opacity: .5;}

    100% {opacity: 1;}
}

@-moz-keyframes mouse-scroll {

    0% {opacity: 0;}

    50% {opacity: .5;}

    100% {opacity: 1;}
}

@-o-keyframes mouse-scroll {

    0% {
        opacity: 0;}

    50% {opacity: .5;}

    100% {opacity: 1;}
}

@keyframes mouse-scroll {

    0% {opacity: 0;}

    50% {opacity: .5;}

    100% {opacity: 1;}
}


@media only screen and (max-width: 767px) {
    header > div {
        padding-top: 35vh;
    }
}

.skills-cont {
    column-count: 3;
    column-width: 400px;
    column-fill: auto;
    margin-top: 25px;
}

.skills-cont .skill {
    border: 6px solid #000;
    padding: 25px;
    min-height: 250px;
    margin-bottom: 15px;
}
!

JS 

              
                (function () {

    'use strict';


    var $projects = $('.projects');

    $projects.isotope({
        itemSelector: '.item',
        layoutMode: 'fitRows'
    });

    $('ul.filters > li').on('click', function (e) {

        e.preventDefault();

        var filter = $(this).attr('data-filter');

        $('ul.filters > li').removeClass('active');
        $(this).addClass('active');

        $projects.isotope({
            filter: filter
        });

    });

    $('.project').mouseenter(function () {

        $(this).find('.project-overlay').css({
            'top': '-100%'
        });
        $(this).find('.project-hover').css({
            'top': '0'
        });

    }).mouseleave(function () {

        $(this).find('.project-overlay').css({
            'top': '0'
        });
        $(this).find('.project-hover').css({
            'top': '100%'
        });

    });

})(jQuery);


var btn = $('#button');

$(window).scroll(function() {
    if ($(window).scrollTop() > 400) {
        btn.addClass('show');
    } else {
        btn.removeClass('show');
    }
});

btn.on('click', function(e) {
    e.preventDefault();
    $('html, body').animate({
        scrollTop: 0
    }, '300');
});

$('.link').click(function(e) {

    e.preventDefault();

    $('html, body').animate({

        scrollTop: $('#' + $(this).data('scroll')).offset().top

    }, '300');

});

(new IntersectionObserver(function(e,o){
    if (e[0].intersectionRatio > 0){
        document.documentElement.removeAttribute('class');
    } else {
        document.documentElement.setAttribute('class','stuck');
    };
})).observe(document.querySelector('.trigger'));

$(document).ready(function(){
    function scrollDown() {
        $('#scroll-d').effect('bounce', {times:3}, 3000, scrollDown);
    }
    scrollDown();
});
!
999px

Console