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              <!-- Skip to Content Link -->
<a href="#content" class="sr">Jump to the main content</a>
<!-- Navigation Toggle Button -->
<a href="#nav" class="nb" title="Jump to the main navigation" role="button">Menu</a>

<!-- Header -->
<header class="h" role="banner">
  <h1 id="logo"><a href="#"><img src="http://placehold.it/260x68" alt="Your Logo" /></a></h1>
</header>

<!-- Mobile Navigation -->
<nav id="nav" class="nav" role="navigation">
  <ul class="navul">
    <li><a href="#">Link One</a></li>
    <li><a href="#">Link Two</a></li>
    <li><a href="#">Link Three</a></li>
    <li><a href="#">Link Four</a></li>
    <li><a href="#">Link Five</a></li>
  </ul>
</nav>

<!-- Nav Closing Button -->
<a href="#top" class="nc" role="button" title="Jump back to the start of the document">X</a>

<!-- Main Content -->
<main class="m" role="main">
  <section id="content">
    <h1>Precious Contents</h1>

    <p>Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet.</p>
  </section>
</main>
            
          
!
            
              /* Font Setting */
html {
  font-family: Verdana, Helvetica, Arial, sans-serif;
  -ms-text-size-adjust: 100%;
  -webkit-text-size-adjust: 100%;
}

/*
  IE is always having a private party and YOU are not invited.
  Yeah, well, since SNAP mode was invented for Windows 8 there have been a few front end developers cursing, shouting and tossing tables:
  (╯°□°)╯︵ ┻━┻

  Thing is... Win8s IE10 and 11 are different on a desktop computer compared to what they do on a mobile device with Win8.
*/
@-ms-viewport {
  width: device-width;
}

body {
  line-height: 1.46;

  overflow-x: hidden;
  color: #333;
  margin: 0;
  
  background: #999;
}

/**
 * Correct `block` display not defined for any HTML5 element in IE 8/9.
 */
header,
nav {
  display: block;
}

/**
 * Remove the gray background color from active links in IE 10.
 */
a {
  font-size: 100%;
  text-decoration: none;
  margin: 0;
  background: transparent;
  color: #fff;
}

/**
 * Improve readability of focused elements when they are also in an
 * active/hover state.
 */
a:active,
a:hover {
  outline: 0;
}

/*
  If you want to overwrite the default tap-highlight-color
  you can define one for your project but keep in mind to make it
an RGBA color with a little transparency so the text won't
  become unreadable after the tap.
  This also has an effect on old Android (2.3). I know because
  I still own one of those.
*/
a:link {
  -webkit-tap-highlight-color: rgba(255, 255, 255, .4);
}

h1 {
  font-size: 1em;
  margin: 0;
}

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

/**
 * Remove border when inside `a` element in IE 8/9/10.
 */
img {
  border: 0;
  max-width: 100%;
  height: auto; /* for safety reasons */
}

/** Helpers **/
/** Invisible but readable for screenreaders
 * This solution has helped me best at hiding contents in favor of images and keep text accessible.
*/
.sr {
  display: block;
  text-indent: 120%;
  overflow: hidden;
  white-space: nowrap;
  height: .008em;
  width: .008em;
}

/* Mobile First Styling */

/**
 * Header
 */
.h {
  z-index: 3;
  width: 38.2%;
  margin-left: 5.5%;
  padding: 1.25em 0;
}

/** Navigation Toggle Button and Closing Button **/
.nb,
.nc {
  font-weight: 700;
  text-transform: uppercase;

  position: absolute;
  right: 1.5em;
  top: 1.75em;
  z-index: 4;

  padding: .4em;

  color: #fff;
  background: #ccc;
  border-radius: .25em;
  border: .08em solid rgba(0,0,0,.25);
  box-shadow: 0 .08em .08em rgba(0, 0, 0, .25);
}

.nb:active,
.nc:active {
  background: #999;
  box-shadow: 0 .08em .08em rgba(255, 255, 255, .65), 0 -.08em .08em rgba(255, 255, 255, .65);
}

/* Normally the closing button is hidden */
.nc {
  display: none;
  z-index: 3;
}

/* and as soon as the nav is targeted we reveal it and place it on top of the menu button */
.nav:target + .nc {
  display: block;
  z-index: 5;
  padding: .38em 1.65em;
}

/** Mobile Navigation Styling
 * The container is at 0 height at first
 * when receiving target everything becomes
 * visible by giving it height and display: block
 */
.nav {
  position: absolute;
  display: block;
  width: 100%;
  height: 0px;
  max-height: 0px;
  padding-top: 0px;
  opacity: 0;
  transition: none ;
}

.nav ul {
  display: none;
  margin: 0;
}

.nav li {
  line-height: 1.65;
  padding: 0 .3275em;
}

.nav a {
  display: block;
  padding: 0;
  width: 0;
  height: 0;
}

/** When clicking the Menu button the nav receives :target
 */
.nav:target {
  position: relative;
  top: -10em;
  z-index: 2;
  padding-top: 10em;
  margin-bottom: -8em;
  height: 100%;
  max-height: 62.5em;
  opacity: 1;
  transition:
    opacity .4s ease-out,
    max-height .4s ease-out;
}

.nav:target ul {
  display: block;
  margin: 1em 5.5%;
}

.nav:target a {
  width: auto;
  height: 100%;
  padding: .3875em 0 .3875em .5475em;
  border-bottom: 0.08em solid rgba(0, 0, 0, 0.25);
}

.nav:target a:hover,
.nav:target a:focus {
  background-color: #aaa;
}

.nav:target a:active {
  color: #999;
  background-color: #fff;
}

/** Main Content Area
 */
.m {
  background: #fff;
  box-shadow: 0 0 .625em .08em rgba(0, 0, 0, .05);
  padding: 1.75em 5.5% 2em;
}
            
          
!
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