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CSS

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HTML 

              
                	<input type="checkbox" id="togglebox" />
	<div class="overlay"><label for="togglebox"></label></div>

	<nav id="offcanvas-menu">
		<label for="togglebox" id="closex">Close</label>
		<ul>
		<li><a href="http://www.javascriptkit.com">Home</a></li>
		<li><a href="http://www.javascriptkit.com/cutpastejava.shtml">JavaScripts</a></li>
		<li><a href="http://www.javascriptkit.com/javatutors">JS Tutorials</a></li>
		<li><a href="http://www.dynamicdrive.com/style/">CSS Library</a></li>
		<li><a href="http://www.dynamicdrive.com/forums/">Forums</a></li>
		<li><a href="http://www.cssdrive.com">CSS Gallery</a></li>
		</ul>
	</nav>

	<div id="contentarea">
		<label for="togglebox" id="navtoggler">Menu</label>
		Some body content here
		some body content here
	</div>
!

CSS 

              
                div#contentarea {
  position: relative;
  width: 100%;
  -moz-transform: translate3d(0, 0, 0);
  -webkit-transform: translate3d(0, 0, 0);
  transform: translate3d(0, 0, 0);
  -moz-transition: -moz-transform 0.5s;
  /* transition settings */
  
  -webkit-transition: -webkit-transform 0.5s;
  transition: transform 0.5s;
}

input[type="checkbox"]#togglebox {
  /* checkbox used to toggle menu state */
  position: absolute;
  left: 0;
  top: 0;
  visibility: hidden;
}

label#navtoggler {
  /* Main label icon to toggle menu state */
  z-index: 9;
  display: block;
  position: relative;
  font-size: 8px;
  /* change font size to change label dimensions. Leave width/height below alone */
  width: 4em;
  height: 2.5em;
  top: 0;
  left: 0;
  text-indent: -1000px;
  border: 0.6em solid black;
  /* border color */
  border-width: 0.6em 0;
  cursor: pointer;
}

label#navtoggler::before {
  /* inner strip inside label */
  content: "";
  display: block;
  position: absolute;
  width: 100%;
  height: 0.6em;
  top: 50%;
  margin-top: -0.3em;
  left: 0;
  background: black;
  /* stripes background color. Change to match border color of parent label above */
}

nav#offcanvas-menu {
  /* Full screen nav menu */
  width: 250px;
  height: 100%;
  top: 0;
  left: 0;
  z-index: 100;
  visibility: hidden; /* this is for browsers that don't support CSS3 translate3d */
  -moz-transform: translate3d(-250px, 0, 0);
  -webkit-transform: translate3d(-250px, 0, 0);
  transform: translate3d(-250px, 0, 0);
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
  background: #C1F2BC;
  display: block;
  position: fixed;
  text-align: center;
  overflow: auto;
  -moz-transition: -moz-transform 0.5s, visibility 0s 0.5s;
  /* transition settings */
  -webkit-transition: -webkit-transform 0.5s, visibility 0s 0.5s;
  transition: transform 0.5s, visibility 0s 0.5s;
}

nav#offcanvas-menu label#closex{ /* Large x close button inside nav */
  width: 50px;
  height: 50px;
	overflow: hidden;
  display: block;
  position: absolute;
  cursor: pointer;
	text-indent: -1000px;
  z-index: 10;
  top: 0;
  right: 0;
}

nav#offcanvas-menu label#closex::before, nav label#closex::after{ /* render large cross inside close button */
  content: "";
  display: block;
  position: absolute;
  width: 100%;
  height: 6px;
  background: black;
  top: 50%;
  margin-top: -3px;
  -ms-transform: rotate(-45deg);
  -webkit-transform: rotate(-45deg);
  transform: rotate(-45deg);
}

nav#offcanvas-menu label#closex::after{ /* render large cross inside close button */
  -ms-transform: rotate(-135deg);
  -webkit-transform: rotate(-135deg);
  transform: rotate(-135deg);
}

nav#offcanvas-menu a{
	text-decoration: none;
  color: black;
  text-transform: uppercase;
}

nav#offcanvas-menu ul{
  list-style: none;
  margin-top: 200px;
	opacity: 0;
  padding: 0;
  position: relative;
  font: bold 1.5em 'Bitter', sans-serif; /* use google font inside nav UL */
  -moz-transition: margin-top 0.2s 0.3s, opacity 0.5s 0.3s; /* transition settings */
  -webkit-transition: margin-top 0.2s 0.3s, opacity 0.5s 0.3s;
  transition: margin-top 0.2s 0.3s, opacity 0.5s 0.3s;
}

nav#offcanvas-menu ul li{
  margin-bottom: 25px;
}

nav#offcanvas-menu ul li a{
  padding: 10px;
  border-radius: 20px;
}

nav#offcanvas-menu ul li a:hover{
  background: lightblue;
}

div.overlay {
	/* overlay that covers entire page when menu is open */
	position: fixed;
	width: 100%;
	height: 100%;
	left: 0;
	top: 0;
	opacity: 0;
	background: black;
	z-index: 99;
	visibility: hidden;
	transition: opacity 0.5s; /* transition settings */
}

div.overlay label {
	/* label of overlay that closes menu when clicked on */
	width: 100%;
	height: 100%;
	position: absolute;
}

input[type="checkbox"]#togglebox:checked ~ div#contentarea {
  margin-left: 10px;
  -moz-transform: translate3d(250px, 0, 0);
  -webkit-transform: translate3d(250px, 0, 0);
  transform: translate3d(250px, 0, 0);
}

input[type="checkbox"]#togglebox:checked ~ nav#offcanvas-menu {
  /* nav state when corresponding checkbox is checked */
  -moz-transform: translate3d(0, 0, 0);
  -webkit-transform: translate3d(0, 0, 0);
  transform: translate3d(0, 0, 0);
  visibility: visible; /* this is for browsers that don't support CSS3 translate3d in showing the menu */
  -moz-transition-delay: 0s; /* No delay for applying "visibility:visible" property when menu is going from "closed" to "open" */
  -webkit-transition-delay: 0s;
  transition-delay: 0s;
}

input[type="checkbox"]#togglebox:checked ~ nav#offcanvas-menu ul{ /* nav state when corresponding checkbox is checked */
	margin-top: 100px;
	opacity: 1;
}

input[type="checkbox"]#togglebox:checked ~ div.overlay{ /* overlay state when corresponding checkbox is checked */
	opacity: 0.6;
	visibility: visible;
}
!

JS
!
999px

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