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Adding Classes

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About the <head>

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!
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CSS

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CSS Base

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JavaScript

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Babel includes JSX processing.

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HTML 

              
                <body id="top">
  <div id="header">
    <a href="#"><img src="http://media.mediatemple.netdna-cdn.com/wp-content/themes/smashing-magazine/assets/images/logo.png" alt="Smashing Magazine Logo" /></a>
  </div>
  <div id="mobile-nav-toggle-buttons">
    <a class="nav-toggle-button" href="#mobile-navigation">Menu</a>
    <a class="search-toggle-button" href="#mobile-search">Search</a>
  </div>
  <div id="mobile-navigation">
    <a class="close-that-nav" href="#top">×</a>
    <nav role="navigation" class="cf">
      <ul>
        <li>Smashing Pages</li>
        <li><a href="#">Nav Item One</a></li>
        <li><a href="#">Nav Item Two</a></li>
        <li><a href="#">Nav Item Three</a></li>
        <li><a href="#">Nav Item Four</a></li>
      </ul>
      <ul>
        <li>Smashing Categories</li>
        <li><a href="#">Nav Item Five</a></li>
        <li><a href="#">Nav Item Six</a></li>
        <li><a href="#">Nav Item Seven</a></li>
        <li><a href="#">Nav Item Eight</a></li>
      </ul>
    </nav>
  </div>
  <div id="mobile-search">
    <a class="close-that-search" href="#top">×</a>
    <form>
      <label for="mobile-search-input">Search on Smashing Magazine</label>
      <input id="mobile-search-input" type="text" />
      <button type="submit">Search</button>
    </form>
  </div>
</body>
!

CSS 

              
                /** Creating something like a browser window **/
html {
  background: gray;
}

body {
  font-family: sans-serif;
  font-size: 1em;
  line-height: 1.46;
  position: relative;
  background: url("http://media.mediatemple.netdna-cdn.com/wp-content/themes/smashing-magazine/assets/images/smbg.png");
  max-width: 800px;
  margin: 0 auto;
  padding: 1.618em 1em;
}

a { text-decoration: none }

.cf::after,
.cf::before {
  content: " ";
  display: table;
}
.cf::after {
  clear: both;
}

/** Styling the header **/
#header {
  position: relative;
  max-width: 61.8%;
  z-index: 2;
}

#mobile-nav-toggle-buttons {
  max-width: 38.2%;
  position: absolute;
  right: 1em;
  top: 2em;
  z-index: 2;
}
#mobile-nav-toggle-buttons a {
  text-transform: uppercase;
  text-align: center;
  color: white;
  float: right;
  margin-right: .75em;
  display: block;
  padding: .75em .5em .5em;
  border: .08em solid rgba(0,0,0,.1);
  outline: 0;
  overflow: hidden;
  border-radius: .25em;
  box-shadow: 0 .08em .08em rgba(0,0,0,.25);
  background: linear-gradient(to bottom, #E95C33 0px, #E53B2C 100%);
  transition: all .3s ease 0s;
}
    
#mobile-nav-toggle-buttons a.active {
  background: #bababa;
  cursor: default;
  box-shadow: 0 .08em .08em rgba(255,255,255,.65), 0 -.08em .08em rgba(255,255,255,.65);
}

#mobile-navigation,
#mobile-search {
  position: absolute;
  clear: both;
  display: none;
  width: 100%;
  padding: 0;
  top: 0;
  height: 0;
  transition: all 0.3s ease 0s;
}

#mobile-navigation:target,
#mobile-search:target {
  padding: 7em 0 0;
  top: -7em;
  z-index: 2;
  height: auto;
  position: relative;
  display: block;
  margin-bottom: -5em;
  z-index: 1;
}

[href="#top"] {
  display: block;
  position: absolute;
  top: 5.35em;
  right: .75em;
  float: right;
  z-index: 3;
  color: #505050;
  font-size: 1.5em;
  padding: .3425em .625em;
  background: transparent none repeat scroll 0% 0%;
  border: .08em solid rgba(0,0,0,.1);
  border-radius: .25em;
  box-shadow: 0 .08em .08em rgba(255,255,255,.7);
}

#mobile-search [href="#top"] {
  top: 5.65em;
}

form {
  position: relative;
  width: 80.9%;
  margin: 1.618em 0;
}

label {
  color: gray;
  display: block;
  padding-bottom: .5em;
}

input[type="text"] {
  font-size: 1em;
  color: #333;
  background-color: #FFF;
  outline: 0;
  width: 61.8%;
  margin: 0;
  border: .08em solid rgba(0,0,0,.1);
  border-right: 0;
  border-radius: .5em 0 0 .5em;
  margin-bottom: 0;
  padding: 0 0 0 .5em;
  height: 2.4em;
  transition: border-color .3s;
}

input[type="text"]:hover,
input[type="text"]:focus {
  border-color: rgba(0,0,0,.4);
}

button {
  font-size: 1em;
  color: white;
  padding: 0 .5em;
  position: absolute;
  top: 2em;
  width: 32.8%;
  line-height: 1.4;
  height: 2.5em;
  background: linear-gradient(to bottom, #E95C33 0px, #E53B2C 100%);
  border: .08em solid rgba(0,0,0,.4);
  border-radius: 0 .5em .5em 0;
}

nav ul {
  list-style: none;
  border-top: .08em solid rgba(0,0,0,.1);
  width: 38.2%;
  float: left;
  max-width: 18.75em;
  padding: 1em 0 0 0;
}

nav ul:nth-child(2) {
  margin-left: 5.5%;
}

nav ul li {
  line-height: 1.65;
  display: block;
  padding: .3275em;
  outline: 0;
  border-top: .08em solid rgba(0,0,0,.05);
  transition: all 0.3s ease 0s;
}

nav ul li:first-child {
  font-size: 1.25em;
  font-weight: bold;
  line-height: 1.45em;
  margin: .25em 0 .5em;
  border: 0;
}
  
nav ul li a {
  color: #41B7D8;
}
!

JS 

              
                jQuery(document).ready(function() {
  jQuery( ".search-toggle-button" ).click(function() {
    jQuery(this).addClass( "active" );
    jQuery( ".nav-toggle-button" ).removeClass( "active" );
  });
  
  jQuery( ".nav-toggle-button" ).click(function(){
    jQuery(this).addClass( "active" );
    jQuery( ".search-toggle-button" ).removeClass( "active" );
  });
  
  jQuery( ".close-that-search" ).click(function(){
    jQuery( ".search-toggle-button" ).removeClass( "active" );
  });
  
  jQuery( ".close-that-nav" ).click(function(){
    jQuery( ".nav-toggle-button" ).removeClass( "active" );
  });
})
!
999px

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