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HTML

              
                <section class="top-banner">
  <div class="top-banner-overlay">
    <h1>Hello World</h1>
    <p>Web-Crunch is a blog about bringing the latest trending news and tutorials for all designers and developers alike. Many other blogs focus on a single niche. Web-Crunch is a small team of writers, designers, and developers who are committed to authoring the best of the best when it comes to the world of design and development. We crunch our ideas and topics together to deliver high quality content for your viewing pleasure.</p>
  </div>
</section>


<nav class="top-nav">
  <div class="menu-wrapper">
    <ul class="menu">
      <li>
        <a href="#">Home</a>
      </li>
      <li>
        <a href="#">About</a>
        <ul class="sub-menu">
          <li>
            <a href="#">Company</a>
          </li>
          <li>
            <a href="#">People</a>
          </li>
        </ul>
      </li>
      <li>
        <a href="#">Projects</a>
      </li>
      <li>
        <a href="#">Clients</a>
      </li>
      <li>
        <a href="#">Contact</a>
      </li>
    </ul>
    <button class="menu-close" aria-label="close menu">x</button>
  </div>
  
  <div class="fixed-menu">
    <button class="menu-open" aria-label="open menu">
      <div class="menu-icon"><svg viewBox="0 0 20 20" width="20" height="20"><title>menu</title><path d="M0 3h20v2H0V3zm0 6h20v2H0V9zm0 6h20v2H0v-2z"></path></svg></div>
    <div class="menu-text screen-reader-text">Menu</div>
    </button>
    
    <ul class="social-links">
      <li>
        <a href="https://facebook.com/webcrunchblog"><svg role="img" viewBox="0 0 24 24" width="24" height="24"><title>Facebook icon</title><path d="M22.676 0H1.324C.593 0 0 .593 0 1.324v21.352C0 23.408.593 24 1.324 24h11.494v-9.294H9.689v-3.621h3.129V8.41c0-3.099 1.894-4.785 4.659-4.785 1.325 0 2.464.097 2.796.141v3.24h-1.921c-1.5 0-1.792.721-1.792 1.771v2.311h3.584l-.465 3.63H16.56V24h6.115c.733 0 1.325-.592 1.325-1.324V1.324C24 .593 23.408 0 22.676 0"></path></svg></a>
      </li>
      <li>
        <a href="https://twitter.com/webcrunchblog"><svg role="img" viewBox="0 0 24 24" width="24" height="24"><title>Twitter icon</title><path d="M23.954 4.569a10 10 0 0 1-2.825.775 4.958 4.958 0 0 0 2.163-2.723c-.951.555-2.005.959-3.127 1.184a4.92 4.92 0 0 0-8.384 4.482C7.691 8.094 4.066 6.13 1.64 3.161a4.822 4.822 0 0 0-.666 2.475c0 1.71.87 3.213 2.188 4.096a4.904 4.904 0 0 1-2.228-.616v.061a4.923 4.923 0 0 0 3.946 4.827 4.996 4.996 0 0 1-2.212.085 4.937 4.937 0 0 0 4.604 3.417 9.868 9.868 0 0 1-6.102 2.105c-.39 0-.779-.023-1.17-.067a13.995 13.995 0 0 0 7.557 2.209c9.054 0 13.999-7.496 13.999-13.986 0-.209 0-.42-.015-.63a9.936 9.936 0 0 0 2.46-2.548l-.047-.02z"></path></svg></a>
      </li>
      <li>
        <a href="https://youtube.com/c/webcrunch"><svg role="img" viewBox="0 0 24 24" width="24" height="24"><title>YouTube icon</title><path class="a" d="M23.495 6.205a3.007 3.007 0 0 0-2.088-2.088c-1.87-.501-9.396-.501-9.396-.501s-7.507-.01-9.396.501A3.007 3.007 0 0 0 .527 6.205a31.247 31.247 0 0 0-.522 5.805 31.247 31.247 0 0 0 .522 5.783 3.007 3.007 0 0 0 2.088 2.088c1.868.502 9.396.502 9.396.502s7.506 0 9.396-.502a3.007 3.007 0 0 0 2.088-2.088 31.247 31.247 0 0 0 .5-5.783 31.247 31.247 0 0 0-.5-5.805zM9.609 15.601V8.408l6.264 3.602z"></path></svg></a>
      </li>
    </ul>
  </div>
</nav>
              
            
!

CSS

              
                * { 
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}

ul {
  list-style: none;
}

button {
  border: none;
  background: transparent;
  outline: none;
  cursor: pointer;
}

button:active {
  color: black;
}

a {
  text-decoration: none;
  color: black;
}

body {
  font: normal 16px/1.5 Helvetica, sans-serif;
}

.screen-reader-text {
  postion: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  -webkit-clip-path: inset(50%);
  clip-path: inset(50%);
  border: 0;
}

.top-banner {
  display: flex;
  width: calc(100% - 60px);
  height: 100vh;
  transform: translateX(60px);
  background: url(https://images.unsplash.com/photo-1517433247151-80815904f4b6?ixlib=rb-1.2.1&q=85&fm=jpg&crop=entropy&cs=srgb&ixid=eyJhcHBfaWQiOjE0NTg5fQ) no-repeat center / cover;
}

.top-banner-overlay {
  display: flex;
  flex-direction: column;
  justify-content: center;
  width: 350px;
  padding: 20px;
  transition: transform 0.4s;
  color: white;
  background: rgba(0, 0, 0, 0.7);
  
  &.is-moved {
    transform: translateX(350px);
    
    &:before {
      content: "";
      position: absolute;
      top: 0;
      bottom: 0;
      right: 100%;
      width: 20px;
      box-shadow: 0 0 10px rgba(0, 0, 0, 0.9);
    }
  }
  
  p {
    font-size: 1rem;
    margin-top: 10px;
  }
}

.top-nav {
  li + li {
    margin-top: 8px;
  }
  .menu-wrapper {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 60px;
    padding: 20px;
    transform: translateX(-350px);
    transition: tranform 0.4s;
    background: #A0F0ED;
    
    &.is-opened {
      transform: translateX(60px);
      width: 350px;
      
      .menu {
        opacity: 1;
        transition-delay: 0.4s;
      }
      
      a { font-size: 1.2rem; }
    }
  }
  
  .menu {
    opacity: 0;
    transition: opacity 0.3s;
  }
  
  .sub-menu {
    padding: 10px 0 0 8px;
  }
  
  .menu-close {
    position: absolute;
    top: 0;
    right: 20px;
    font-size: 1.6rem;
  }
  
  .fixed-menu {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    width: 60px;
    padding: 20px;
    color: #20504F;
    background: #64D5CA;
    
    .menu-open {
      display: inline-flex;
      align-items: center;
      text-align: left;
      margin: 0 0 auto;
      width: auto;
      cursor: pointer;
      color: #20504F;
      
      svg { fill: #20504F; }
      
      &:hover, &:focus {
        opacity: 0.9;
      }
    }
    .menu-icon { margin-right: 10px; }
  }
}

.social-links svg {
  fill: #20504F;
}
              
            
!

JS

              
                /* Let's Build: With JavaScript - Web-Crunch.com
   Subscribe on YouTube - https://youtube.com/c/webcrunch
   
   Let's Build: Off Canvas Menu 
*/

const menuOpen = document.querySelector('.top-nav .menu-open');
const menuClose = document.querySelector('.top-nav .menu-close');
const menuWrapper = document.querySelector('.top-nav .menu-wrapper');
const topBannerOverlay = document.querySelector('.top-banner-overlay');

function toggleMenu() {
  menuOpen.addEventListener('click', () => {
    menuWrapper.classList.add('is-opened');
    topBannerOverlay.classList.add('is-moved');
  });
  
  menuClose.addEventListener('click', () => {
    menuWrapper.classList.remove('is-opened');
    topBannerOverlay.classList.remove('is-moved');
  });
}

toggleMenu();
              
            
!
999px

Console