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About the <head>

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CSS

About CSS Preprocessors

CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

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CSS Base

About CSS Base

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

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About Vendor Prefixing

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JavaScript

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HTML 

              
                <script src="https://use.typekit.net/ehh4lya.js"></script>
<script>try{Typekit.load({ async: true });}catch(e){}</script>

<nav class="side">
    <div class="side__inner">
        <div class="top"><a href="#">Sundar Kannan</a></div>
        <div class="bottom">
            <a href="http://picodeclub.com" target="_blank">Pi Code Club</a>
            <a href="http://firsteducationnews.com" target="_blank">First Education News</a>
            <a target="_blank" href="https://codepen.io/">CodePen</a>
        </div>
    </div>
</nav>

<section class="section section--hello" id="hello">
    <div class="section__inner">
        <div class="block">
            <a class="pre" href="#intro"><span>#0</span>Tutorial Javascript</a>
            <h2>JAVASCRIPT</h2>
            <ul class="anchornav">
                <li><a href="#intro">Intro <span>#1 What is javascript?</span></a></li>
                <li><a href="#about">About <span>#2 Who is this guy?</span></a></li>
                <li><a href="#clients">Clients <span>#3 Who did he work for?</span></a></li>
                <li><a href="#portfolio">Portfolio <span>#4 What did he do?</span></a></li>
                <li><a href="#contact">Contact <span>#5 Write him a message</span></a></li>
            </ul>
        </div>
    </div>
</section>

<section class="section section--intro" id="intro">
    <div class="section__inner">
        <div class="block">
            <a class="pre" href="#intro"><span>#1</span>Intro</a>
            <h1>Javascript is a<br>
                web linguage<br>
                taht we use to improve<br>
                our HTML code</h1>
            <p class="lead">
              Hi <a href="#intro">everybody</a> this is my first javascript tutorial here you will find some <a href="#intro">javascript examlple</a> that help me and you to improve our javascript <a href="#intro">knowledge</a> , get down and start whit the <a href"#intro">first example</a>
            </p>
        </div>
    </div>
</section>

<section class="section section--about" id="about">
    <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 10" preserveAspectRatio="none">
        <polygon points="100 0 100 10 0 10" />
    </svg>

    <div class="section__inner">
        <div class="block">
            <a class="pre" href="#about"><span>#2</span>Building</a>
            <h2>Volker works for companies and agencies, creating responsive web applications.</h2>
            <p class="lead">Building the right foundation to ongoing optimization and support. In short, he tries to make the web a better place.</p>
        </div>
    </div>

</section>

<section class="section section--clients" id="clients">
    <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 10" preserveAspectRatio="none">
        <polygon points="100 10 0 0 0 10" />
    </svg>

    <div class="section__inner">
        <div class="block">
            <a class="pre" href="#clients"><span>#3</span>Clients</a>
            <h2>Volker works with corporations, institutions and startups in a wide range of industries.</h2>
            <p class="lead">Here are some of his clients, he has had the pleasure working with:</p>
        </div>
    </div>

</section>

<section class="section section--portfolio1" id="portfolio">
    <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" preserveAspectRatio="none">
        <path d="M0 100 C 20 0 50 0 100 100 Z"></path>
    </svg>

    <div class="section__inner">
        <div class="block">
            <a class="pre" href="#portfolio"><span>#4</span>Portfolio</a>
            <h2>Portfolio Item #1</h2>
            <p class="lead">Here are some of his clients, he has had the pleasure working with.</p>
        </div>
    </div>
</section>


<section class="section section--portfolio" id="portfolio2">
    <div class="section__inner">
        <div class="block">
            <h2>Portfolio Item #2</h2>
            <p>Descripton of said portfolio item.</p>
        </div>
    </div>
    <svg xmlns="http://www.w3.org/2000/svg" version="1.1" width="100%" height="100" viewBox="0 0 100 102" preserveAspectRatio="none" class="bottom">
        <path d="M0 0 L50 100 L100 0 Z"></path>
    </svg>
</section>


<section class="section section--contact" id="contact">
    <div class="section__inner">
        <div class="block">
            <a class="pre" href="#contact"><span>#5</span>Get in touch</a>
            <h2>For work inquiries<br>please email:<br>
                <span><a href="mailto:kanquest@gmail.com">kanquest@gmail.com</a></span></h2>
           <p><a href="https://twitter.com/picodeclub1">Twitter</a> and <a href="https://in.linkedin.com/in/maverick-den-33a76812a">Linkedin</a>.</p>
        </div>
    </div>
</section>
!

CSS 

              
                html {
  box-sizing: border-box;
  font-family: "ff-meta-serif-web-pro", serif;
  color: #555;
  font-size: 16px;
}
@media (min-width: 6.25em) {
  html {
    font-size: 17px;
  }
}
@media (min-width: 12.5em) {
  html {
    font-size: 18px;
  }
}
@media (min-width: 18.75em) {
  html {
    font-size: 19px;
  }
}
@media (min-width: 25em) {
  html {
    font-size: 20px;
  }
}
@media (min-width: 31.25em) {
  html {
    font-size: 21px;
  }
}
@media (min-width: 37.5em) {
  html {
    font-size: 22px;
  }
}
@media (min-width: 43.75em) {
  html {
    font-size: 23px;
  }
}
@media (min-width: 50em) {
  html {
    font-size: 24px;
  }
}
@media (min-width: 56.25em) {
  html {
    font-size: 25px;
  }
}
@media (min-width: 62.5em) {
  html {
    font-size: 26px;
  }
}
@media (min-width: 68.75em) {
  html {
    font-size: 27px;
  }
}
@media (min-width: 75em) {
  html {
    font-size: 28px;
  }
}
@media (min-width: 81.25em) {
  html {
    font-size: 29px;
  }
}
@media (min-width: 87.5em) {
  html {
    font-size: 30px;
  }
}
@media (min-width: 93.75em) {
  html {
    font-size: 31px;
  }
}
@media (min-width: 100em) {
  html {
    font-size: 32px;
  }
}
@media (min-width: 106.25em) {
  html {
    font-size: 33px;
  }
}
@media (min-width: 112.5em) {
  html {
    font-size: 34px;
  }
}
@media (min-width: 118.75em) {
  html {
    font-size: 35px;
  }
}
@media (min-width: 125em) {
  html {
    font-size: 36px;
  }
}

*, *::before, *::after {
  box-sizing: inherit;
  margin: 0;
  padding: 0;
}

a {
  text-decoration: none;
}

/**
 * The fixed Side 
 */
.side {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 1000;
  width: 50px;
  border-right: 1px dashed rgba(0, 0, 0, 0.3);
  color: rgba(0, 0, 0, 0.5);
  font-family: "nimbus-sans", sans-serif;
  text-transform: uppercase;
  letter-spacing: .0875rem;
  font-size: 9px;
  -webkit-transition: all 0.3s cubic-bezier(0.05, 0.69, 0.14, 1);
  transition: all 0.3s cubic-bezier(0.05, 0.69, 0.14, 1);
}
.side:hover {
  color: rgba(0, 0, 0, 0.5);
}
.side .side__inner {
  position: relative;
  height: 100%;
  white-space: nowrap;
}
.side a {
  color: inherit;
  word-spacing: 0;
  -webkit-transition: all 0.3s cubic-bezier(0.05, 0.69, 0.14, 1);
  transition: all 0.3s cubic-bezier(0.05, 0.69, 0.14, 1);
}
.side .top,
.side .bottom {
  position: absolute;
  left: 0;
  -webkit-transform: rotate(-90deg) perspective(1px);
          transform: rotate(-90deg) perspective(1px);
  -webkit-transform-origin: 50px 50px;
          transform-origin: 50px 50px;
  height: 50px;
  line-height: 50px;
  white-space: nowrap;
  word-spacing: .5rem;
}
.side .top {
  top: 25px;
  text-align: right;
  color: black;
}
.side .bottom {
  top: auto;
  bottom: 75px;
}
.side .bottom:hover a {
  color: rgba(0, 0, 0, 0.2);
}
.side .bottom:hover a:hover {
  color: rgba(0, 0, 0, 0.8);
}

/**
 * The first navigation
 */
.anchornav {
  margin: 0;
  padding: 0;
  list-style: none;
}
.anchornav li {
  display: block;
}
.anchornav li::after {
  content: '';
  width: 1.3rem;
  display: block;
  height: 2px;
  background: black;
}
.anchornav li:last-child::after {
  display: none;
}
.anchornav a {
  display: block;
  padding: 1em 0;
  font-family: "nimbus-sans", sans-serif;
  text-transform: uppercase;
  font-size: 12px;
  letter-spacing: 1.4px;
  color: inherit;
  -webkit-transition: all 0.3s cubic-bezier(0.05, 0.69, 0.14, 1);
  transition: all 0.3s cubic-bezier(0.05, 0.69, 0.14, 1);
}
.anchornav a span {
  display: inline;
  padding: .5em 0 0;
  opacity: .3;
  letter-spacing: normal;
  font-family: "ff-meta-serif-web-pro", serif;
  text-transform: none;
}
.anchornav a:hover {
  color: #de5f5f;
}
.anchornav a:hover span {
  opacity: 1;
  color: #181818;
}

/**
 * The different sections
 */
.section {
  position: relative;
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-flex-flow: column nowrap;
      -ms-flex-flow: column nowrap;
          flex-flow: column nowrap;
  -webkit-box-align: stretch;
  -webkit-align-items: stretch;
      -ms-flex-align: stretch;
          align-items: stretch;
  min-height: 60vh;
  width: 100%;
  -webkit-align-content: center;
      -ms-flex-line-pack: center;
          align-content: center;
  padding: 20vh 50px 20vh 75px;
}
.section svg {
  position: absolute;
  top: -50px;
  left: 0;
  right: 0;
  width: 100%;
  height: 50px;
}
.section svg.bottom {
  bottom: 0;
  top: auto;
  fill: grey;
}
.section .section__inner {
  height: 100%;
  max-width: 800px;
  margin: auto auto auto 0;
}
.section.section--hello {
  background-color: #FDEF52;
  color: #181818;
}
.section.section--intro {
  background-color: white;
  color: #555;
}
.section.section--about {
  background-color: #de5f5f;
  color: white;
}
.section.section--about svg {
  fill: #de5f5f;
}
.section.section--clients {
  background-color: #343436;
  color: white;
}
.section.section--clients svg {
  fill: #343436;
}
.section.section--portfolio {
  background-color: orange;
  color: white;
}
.section.section--portfolio svg {
  top: -20px;
  fill: orange;
}
.section.section--portfolio svg.bottom {
  top: auto;
  bottom: -50px;
}
.section.section--portfolio1 {
  background-color: #3A99D8;
  color: white;
}
.section.section--portfolio1 svg {
  top: -50px;
  fill: #3A99D8;
}
.section.section--pepperhill svg {
  top: -50px;
  fill: #3A99D8;
}
.section.section--contact svg {
  fill: white;
}

/**
 * Typo
 */
h1, .h1, h2, .h2, h3, .h3, h4, .h5 {
  font-family: "nimbus-sans", sans-serif;
  font-weight: bold;
  margin: 0 0 1em;
  line-height: 1;
  letter-spacing: -1px;
}
@media (min-width: 30rem) {
  h1, .h1, h2, .h2, h3, .h3, h4, .h5 {
    letter-spacing: -2px;
  }
}
h1 a, .h1 a, h2 a, .h2 a, h3 a, .h3 a, h4 a, .h5 a {
  color: inherit;
}
h1 a:hover, .h1 a:hover, h2 a:hover, .h2 a:hover, h3 a:hover, .h3 a:hover, h4 a:hover, .h5 a:hover {
  border-bottom: .1875rem solid;
}
h1 span, .h1 span, h2 span, .h2 span, h3 span, .h3 span, h4 span, .h5 span {
  color: #de5f5f;
}

h1, .h1 {
  font-size: 1.2rem;
}
@media (min-width: 30rem) {
  h1, .h1 {
    font-size: 2.5rem;
  }
}

h2, .h2 {
  font-size: 1.2rem;
}
@media (min-width: 30rem) {
  h2, .h2 {
    font-size: 2.5rem;
  }
}

.pre {
  display: inline-block;
  font-size: 12px;
  margin: 0;
  opacity: .8;
  letter-spacing: 1.4px;
  word-spacing: .2rem;
  text-transform: uppercase;
  margin-bottom: 1em;
  color: inherit;
}
.pre span {
  font-size: .9em;
  margin-right: .4em;
  opacity: .5;
}
.pre:hover {
  opacity: 1;
}

p {
  font-size: .75rem;
  line-height: 1.4;
}
@media (min-width: 30rem) {
  p {
    font-size: .875rem;
  }
}
p a {
  font-weight: bold;
  color: inherit;
}
p a:hover {
  border-bottom: .1875rem solid;
}

.lead {
  display: block;
  font-size: .875rem;
  margin: 0;
}
@media (min-width: 30rem) {
  .lead {
    font-size: 1rem;
  }
}

.portfolio {
  font-size: .75rem;
}
.portfolio.block {
  display: inline-block;
  width: 100%;
}
@media (min-width: 30rem) {
  .portfolio.block {
    width: 30%;
  }
}
.portfolio .link {
  display: block;
  margin: 2em 0 0 0;
  color: #555;
  letter-spacing: 2px;
  font-size: 12px;
}
.portfolio p {
  font-size: inherit;
  color: #343436;
  opacity: .7;
}
!

JS
!
999px

Console