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CSS Base

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              <header class="banner">
  <button id="menu-toggle" aria-label="Menu" aria-expanded="false" aria-controls="menu"></button>
  <div class="brand"><a href="https://codepen.io/collection/nqObom/">&bopf;</a></div>            
</header>

<nav id="menu" aria-hidden="true" aria-labelledby="menu-toggle" role="navigation">
<ul>
  <li><a href="https://codepen.io/razitazi/pen/gbXMob">Life is important</a></li>
  <li><a href="https://codepen.io/razitazi/pen/gbXMob">No it really isn't</a></li>
  <li><a href="https://codepen.io/razitazi/pen/gbXMob">I'm serious dude, not that important</a></li>
</ul>
</nav>
            
<div class="container" role="main">
  <article>
    <h2>Accessible fullscreen overlay menu</h2>
      <p>Accessibility got more and more important now when the web is turning in to the everyday toolbox for most people in the western world. So, I decided to focus on that in this menu.</p>
      <p>This is the second entry in my <strong><a href="https://codepen.io/collection/nqObom/">A to J</a></strong> navigation collection.
      <p>Feel free to fork, play and improve!</p>
  </article>
</div>
            
          
!
            
              body {
    width: 100%;
    height: 100%;
    margin: 0;

    font-family: "Roboto", sans-serif;
    font-size: 80%;

    color: #232629;
    background: url("http://razitazi.com/img/CDFFE6C72E.jpg") no-repeat center center fixed;
    background-color: #232629;
    -webkit-background-size: cover;
       -moz-background-size: cover;
         -o-background-size: cover;
            background-size: cover;
}
a {
    color: #232629;
}
p {
    line-height: 1.7;
}
h2 {
    font-family: "Lora", serif;
    font-size: 1.7em;
    line-height: 1;

    letter-spacing: 2px;
}
div {
    -webkit-box-sizing: border-box;
       -moz-box-sizing: border-box;
            box-sizing: border-box;
}
button:focus {
    outline: none;
}
/* THAT FIXED HEADER */
header.banner {
    position: fixed;
    top: 0;
    z-index: 100;

    width: 100%;
    padding: 30px;
    box-sizing: border-box;
}
/* MENU TOGGLE ICON */
#menu-toggle {
    position: relative;

    width: 51px;
    height: 51px;

    cursor: pointer;

    border: 1px solid #fff;
    -webkit-border-radius: 50px;
       -moz-border-radius: 50px;
            border-radius: 50px;
    background: transparent;
}
#menu-toggle:before,
#menu-toggle:after {
    position: absolute;

    content: "";
    content: "";
    -webkit-transition: all .350s ease;
       -moz-transition: all .350s ease;
         -o-transition: all .350s ease;
            transition: all .350s ease;

    background-color: #fff;
}

#menu-toggle:before {
    top: 12px;
    left: 25px;

    width: 1px;
    height: 27px;
}
#menu-toggle:after {
    top: 25px;
    left: 12px;

    width: 27px;
    height: 1px;
}
#menu-toggle:hover:before,
#menu-toggle:hover:after {
    -webkit-transform: rotate(5deg);
        -ms-transform: rotate(5deg);
            transform: rotate(5deg);
}
.open #menu-toggle:before,
.open #menu-toggle:after {
    -webkit-transform: rotate(45deg);
        -ms-transform: rotate(45deg);
            transform: rotate(45deg);
}
/* A COMES AFTER B */
.brand {
    float: right;
    height: 51px;

    font-size: 70px;
    font-weight: 100;
    line-height: .6;
}
.brand a {
    -webkit-transition: all .350s ease;
       -moz-transition: all .350s ease;
         -o-transition: all .350s ease;
            transition: all .350s ease;
    text-decoration: none;

    color: #ccc;
}
.brand a:hover {
    cursor: pointer;

    color: #fff;
}
.open .brand {
    color: #fff;
}
/* OVERLAY MENU */
#menu {
    position: fixed;
    top: 0;
    bottom: 0;

    display: table;
    visibility: hidden;
    width: 100%;
    height: 100%;

    font-family: "Lora", serif;

    transition: opacity .5s, visibility .5s;
    text-align: center;

    opacity: 0;
    background-color: rgba(0, 0, 0, .85);
}
.open #menu {
    visibility: visible;

    opacity: 1;
}
#menu ul {
    display: table-cell;
    padding: 0;
    margin-top: 30px;

    list-style: none;

    vertical-align: middle;
}

#menu ul li a {
    display: block;

    font-size: 28px;
    font-weight: 100;
    line-height: 80px;

    -webkit-transition: all .3s ease;
       -moz-transition: all .3s ease;
         -o-transition: all .3s ease;
            transition: all .3s ease;
    text-decoration: none;

    color: #fff;
}
#menu ul li a:hover {
    font-size: 30px;
}
/* CONTENT CONTAINER */
.container {
    position: absolute;
    right: 30px;
    bottom: 30px;
    z-index: -100;

    max-width: 550px;
    min-width: 200px;
    padding: 20px 40px;

    background-color: #fff;
}

            
          
!
            
              $(document).ready(function() {
    $('#menu-toggle, #menu > ul > li > a').click(function(e) { 
        var $toggle = $(this); 
        var $menu = $('#' + $(this).attr('aria-controls')); 
    
        if ($menu.attr('aria-hidden') == 'true') {
            $('body').addClass('open');
            $menu.attr('aria-hidden', 'false');
            $toggle.attr('aria-expanded', 'true');
        }
        else if ($menu.attr('aria-hidden') == 'false') {
            $('body').removeClass('open');
            $menu.attr('aria-hidden', 'true');
            $toggle.attr('aria-expanded', 'faremove'); 
        }
    });
});
            
          
!
999px
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