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HTML

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Adding Classes

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. So you don't have access to higher-up elements like the <html> tag. If you want to add classes there that can affect the whole document, this is the place to do it.

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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Insecure Resource

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CSS

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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

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JavaScript

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JavaScript preprocessors can help make authoring JavaScript easier and more convenient.

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Babel includes JSX processing.

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HTML 

              
                <!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.14.0/css/all.min.css" integrity="sha512-1PKOgIY59xJ8Co8+NE6FZ+LOAZKjy+KY8iq0G4B3CyeY6wYHN3yt9PW0XpSriVlkMXe40PTKnXrLnZ9+fkDaog==" crossorigin="anonymous" />
    <link rel="stylesheet" href="style.css" />
    <title>Rotating Navigation</title>
  </head>
  <body>
    <div class="container">
      <div class="circle-container">
        <div class="circle">
          <button id="close">
            <i class="fas fa-times"></i>
          </button>
          <button id="open">
            <i class="fas fa-bars"></i>
          </button>
        </div>
      </div>

      <div class="content">
        <h1>Amazing Article</h1>
        <small>Florin Pop</small>
        <p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Accusantium quia in ratione dolores cupiditate, maxime aliquid impedit dolorem nam dolor omnis atque fuga labore modi veritatis porro laborum minus, illo, maiores recusandae cumque ipsa quos. Tenetur, consequuntur mollitia labore pariatur sunt quia harum aut. Eum maxime dolorem provident natus veritatis molestiae cumque quod voluptates ab non, tempore cupiditate? Voluptatem, molestias culpa. Corrupti, laudantium iure aliquam rerum sint nam quas dolor dignissimos in error placeat quae temporibus minus optio eum soluta cupiditate! Cupiditate saepe voluptates laudantium. Ducimus consequuntur perferendis consequatur nobis exercitationem molestias fugiat commodi omnis. Asperiores quia tenetur nemo ipsa.</p>

        <h3>My Dog</h3>
        <img src="https://images.unsplash.com/photo-1507146426996-ef05306b995a?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=2100&q=80" alt="doggy" />
        <p>Lorem, ipsum dolor sit amet consectetur adipisicing elit. Sit libero deleniti rerum quo, incidunt vel consequatur culpa ullam. Magnam facere earum unde harum. Ea culpa veritatis magnam at aliquid. Perferendis totam placeat molestias illo laudantium? Minus id minima doloribus dolorum fugit deserunt qui vero voluptas, ut quia cum amet temporibus veniam ad ea ab perspiciatis, enim accusamus asperiores explicabo provident. Voluptates sint, neque fuga cum illum, tempore autem maxime similique laborum odio, magnam esse. Aperiam?</p>
      </div>
    </div>

    <nav>
      <ul>
        <li><i class="fas fa-home"></i><a href="#"> Home</a></li>
        <li><i class="fas fa-user-alt"></i><a href="#"> About</a></li>
        <li><i class="fas fa-envelope"></i><a href="#"> Contact</a></li>
      </ul>
    </nav>
    <script src="script.js"></script>
  </body>
</html>
!

CSS 

              
                @import url('https://fonts.googleapis.com/css?family=Lato&display=swap');

* {
  box-sizing: border-box;
}

body {
  font-family: 'Lato', sans-serif;
  background-color: #333;
  color: #222;
  overflow-x: hidden;
  margin: 0;
}

.container {
  background-color: #fafafa;
  transform-origin: top left;
  transition: transform 0.5s linear;
  width: 100vw;
  min-height: 100vh;
  padding: 50px;
}

.container.show-nav {
  transform: rotate(-20deg);
}

.circle-container {
  position: fixed;
  top: -100px;
  left: -100px;
}

.circle {
  background-color: #ff7979;
  height: 200px;
  width: 200px;
  border-radius: 50%;
  position: relative;
  transition: transform 0.5s linear;
}

.container.show-nav .circle {
  transform: rotate(-70deg);
}

.circle button {
  cursor: pointer;
  position: absolute;
  top: 50%;
  left: 50%;
  height: 100px;
  background: transparent;
  border: 0;
  font-size: 26px;
  color: #fff;
}

.circle button:focus {
  outline: none;
}

.circle button#open {
  left: 60%;
}

.circle button#close {
  top: 60%;
  transform: rotate(90deg);
  transform-origin: top left;
}

.container.show-nav + nav li {
  transform: translateX(0);
  transition-delay: 0.3s;
}

nav {
  position: fixed;
  bottom: 40px;
  left: 0;
  z-index: 100;
}

nav ul {
  list-style-type: none;
  padding-left: 30px;
}

nav ul li {
  text-transform: uppercase;
  color: #fff;
  margin: 40px 0;
  transform: translateX(-100%);
  transition: transform 0.4s ease-in;
}

nav ul li i {
  font-size: 20px;
  margin-right: 10px;
}

nav ul li + li {
  margin-left: 15px;
  transform: translateX(-150%);
}

nav ul li + li + li {
  margin-left: 30px;
  transform: translateX(-200%);
}

nav a{
  color: #fafafa;
  text-decoration: none;
  transition: all 0.5s;
}

nav a:hover {
  color: #FF7979;
  font-weight: bold;
}

.content img {
  max-width: 100%;
}

.content {
  max-width: 1000px;
  margin: 50px auto;
}

.content h1 {
  margin: 0;
}

.content small {
  color: #555;
  font-style: italic;
}

.content p {
  color: #333;
  line-height: 1.5;
}
!

JS 

              
                const open = document.getElementById('open')
const close = document.getElementById('close')
const container = document.querySelector('.container')

open.addEventListener('click', () => container.classList.add('show-nav'))

close.addEventListener('click', () => container.classList.remove('show-nav'))
!
999px

Console