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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">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <link href="https://fonts.googleapis.com/css?family=Roboto+Condensed" rel="stylesheet">
  <title>Solo: Open source FIDO2 security key</title>
</head>
<body>
  <header id="header">
    <a href="#" id="home-link"><img id="header-img" src="https://solokeys.com/images/logos/logo-black_on_transparent.svg"></a>
    <nav id="nav-bar">
      <a href="https://solokeys.com/kickstarter" class="nav-link" id="kickstarter">Kickstarter</a>
      <a href="#features" class="nav-link">Features</a>
      <a href="#products" class="nav-link">Products</a>
    </nav>
  </header>
  <section id="story">
    <form id="form" action="https://freecodecamp.com/email-submit">
      <p>If you share your email with us, we promise to only share exciting news with you.</p>
      <input id="email" type="email" name="email" placeholder="hello@robloranger.ca" required>
      <input type="submit" id="submit">
    </form>
    <div id="vid-wrap">
      <iframe id="video" width="560" height="349" frameborder=0 src="https://www.youtube.com/embed/YAYT5X7Pfto" allowfullscreen></iframe>
    </div>
  </section>
  <section id="features">
    <div class="feature">
      <h2>Powerful chip packs a punch</h2>
      <p>We will use the STMicroelectronics STM32 L4 42KC, which has a ton of goodies: true random number generator for key generation, security isolation for key, onboard crypto, plus two levels of locked flash.</p>
    </div>
    <div class="feature">
      <h2>Colorful silicon cases</h2>
      <p>To protect your security key from physical harm, we researched until we found your favourite colors. Pick any, pick all!</p>
    </div>
    <div class="feature">
      <h2>Free updates forever</h2>
      <p>Any bugs or extensions to our firmware will be available on our website. To update at any time, insert your key and your key will be up-to-date.</p>
    </div>
  </section>
  <section id="products">
    <div class="card" id="solo">
      <h2>Solo</h2>
      <p>The first open source FIDO2 security key. Secure login, open, easy.</p>
    </div>
    <div class="card" id="tap">
      <h2>Solo Tap</h2>
      <p>Contactless Solo optimized for mobile. The convenience of just a tap.</p>
    </div>
    <div class="card" id="advanced">
      <h2>Solo for Advanced protection</h2>
      <p>Solo + SecureClick. The perfect bundle for Google's Advanced Protection Program.</p>
    </div>
    <div class="card" id="hackers">
      <h2>Solo for Hackers</h2>
      <p>It's open source, of course you can hack it. Any Solo or Solo tap.</p>
    </div>
  </section>
  <footer>
    <nav>
      <h3>Social</h3>
      <ul>
        <li><a href="https://github.com/SoloKeysSec/" target="_blank">Github</a></li>
        <li><a href="https://twitter.com/SoloKeysSec/" target="_blank">Twitter</a></li>
        <li><a href="https://facebook.com/SoloKeysSec/" target="_blank">Facebook</a></li>
        <li><a href="https://vimeo.com/solokeys" target="_blank">Vimeo</a></li>
        <li><a href="https://solo.re/yt/" target="_blank">YouTube</a></li>
      </ul>
    </nav>
    <nav>
      <h3>Site Menu</h3>
      <ul>
        <li><a href="">Kickstarter</a></li>
        <li><a href="#features">Features</a></li>
        <li><a href="#products">Products</a></li>
        <li><a href="#">Back To Top</a></li>
      </ul>
    </nav>
  </footer>
</body>
</html>
              
            
!

CSS

              
                body {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 0;
  font-size: 16px;
}

#header {
  width: 100%;
  height: 4.5em;
  display: flex;
  position: fixed;
  flex-direction: column;
  background-color: hsl(204, 75%, 99%);
  font-family: 'Roboto Condensed', sans-serif;
  font-weight: 750;
}

#header-img {
  height: 40px;
}

#home-link {
  text-align: center;
}

#nav-bar {
  font-size: 1.2em;
  height: 2em;
  margin: 0.2em;
  display: flex;
  justify-content: center;
  align-items: center;
}

#nav-bar a {
  margin: 0 0.35em;
  text-decoration: none;
  color: hsl(345, 6%, 13%);
}

#nav-bar a:hover {
  color: hsl(204, 75%, 56%);
}

#story, #features, #products {
  box-sizing: border-box;
  padding-top: 4.7em;
  width: 100%;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

#story {
  background-color: hsl(204, 75%, 56%);
}

#form {
  margin-bottom: 2em;
  padding: 1em;
  max-width: 500px;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
}

#form p {
  font-size: 1.2em;
}

#form input {
  margin: .1em;
  height: 2em;
  font-size: 1.1em;
}

#form > input[type=email] {
  flex-grow: 3;
}

#vid-wrap {
  padding-bottom: 56.25%;
  padding-top: 25px;
  height: 0;
  width: 100%;
  max-width: 640px;
}

#vid-wrap iframe {
  top: 0;
  left: 0;
  width: 100%;
}

#features, #products {
  padding-left: 1em;
  padding-right: 1em;
}

#features {
  background-color: hsl(150, 78%, 74%);
}

.feature, .card {
  max-width: 560px;
}

.card {
  width: 100%;
  height: 100vw;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.card h2 {
  flex-grow: 0;
  align-self: flex-start;
  margin: .2em;
  padding: .2em .4em;
  border: 2px solid;
  border-radius: 4px;
}

.card p {
  box-sizing: inherit;
  width: 100%;
  padding: 1em;
}

#solo {
  background-color: hsl(204, 75%, 97%);
}

#solo p {
  color: hsl(204, 75%, 99%);
  background-color: hsl(204, 75%, 56%);
}

#tap {
  background-color: hsl(150, 78%, 97%);
}

#tap p {
  background-color: hsl(150, 78%, 74%);
}

#advanced {
  background-color: hsl(358, 67%, 97%);
}

#advanced p {
  color: hsl(358, 75%, 99%);
  background-color: hsl(358, 67%, 54%);
}

#hackers {
  background-color: hsl(150, 22%, 97%);
}

#hackers p {
  background-color: hsl(150, 22%, 88%);
}

footer {
  width: 100%;
  box-sizing: border-box;
  padding: 2em 1em;
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  align-items: center;
  color: hsl(150, 18%, 18%);
  background-color: hsl(150, 22%, 88%);
}

footer nav {
  text-align: center;
}

footer ul {
  list-style: none;
  padding: 0;
}

@media only screen and (min-width: 560px) {
  #header {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-end;
  }
  
  #header-img {
    height: 60px
  }
  
  #nav-bar {
    font-size: 1.6em;
  }
  
  #nav-bar #kickstarter {
    padding: .2em .4em;
    color: hsl(358, 75%, 99%);
    background-color: hsl(358, 67%, 54%);
    border-radius: 500px;
  }
  
  #nav-bar #kickstarter:hover {
    background-color: hsl(358, 60%, 64%);
  }
  
  .feature {
    margin: 5px 0;
    padding: 5px;
  }
  
  .card {
    height: 100vh;
    max-height: calc(100vh - 4.7em);
  }
  footer {
    flex-direction: row;
  }
  
  footer nav{
    text-align: left;
  }
}

@media only screen and (min-width: 1024px) {
  #header {
    justify-content: space-around;
  }
  
  #products {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .card {
    width: 50%;
    height: 50vh;
    max-height: calc(50vh - 2.35em);
    border: 4px solid transparent;
  }
}

@media only screen and (min-width: 1600px) {
  .card {
    flex: 1 0 21%;
  }
}
              
            
!

JS

              
                
              
            
!
999px

Console