Off Canvas Menu CSS-only

index.html

<nav class="site-navbar">
      <input type="checkbox" id="toggle_menu" class="toggle-menu-checkbox" />
      <label for="toggle_menu" class="toggle-menu-label uppercase"></label>
      <input type="checkbox" id="toggle_overlay" class="toggle-overlay-checkbox" />
      <label for="toggle_menu" class="toggle-overlay-label uppercase"></label>
      <ul class="site-menu">
        
      </ul>

    </nav>

off-canvas-menu-css-only.markdown

Off Canvas Menu CSS-only

Just like you know it from all the mobile and responsive websites, just with pure CSS and not a single line of JavaScript.

A Pen by gilad on CodePen.

License.

scripts

<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>

style.scss

/* =Variables + Placeholder
----------------------------------------------------- */
$toggle-stripe-2: 4px;
$toggle-stripe-3: 8px;

$navbar-background: #000;
$navbar-color: #fff;

$transition: .2s ease-in-out;

$menu-width: 240px;
$menu-shadow: 4px 0 16px -4px rgba(0, 0, 0, .2);

%transition {
 -webkit-transition: $transition;
    -moz-transition: $transition;
         transition: $transition;
}

/* =Basic styles
----------------------------------------------------- */
body {
  background: #eee;
  font: 16px/1.4 "Roboto", Arial, sans-serif;
}

a {
  text-decoration: none;
}

/* =Navbar
----------------------------------------------------- */
.site-navbar {
  background: $navbar-background;
  font-size: 14px;
  height: 60px;
  left: 20px;
  position: fixed;
  right: 20px;
  top: 20px;
  z-index: 11;
}

/* =Menu
----------------------------------------------------- */
.site-menu {
  @extend %transition;
  background: #fff;
  bottom: 0;
  font-size: 14px;
  height: 100%;
  left: -$menu-width;
  list-style: none;
  margin: 0;
  padding: 0;
  position: fixed;
  top: 0;
  width: $menu-width;
}

.site-menu-item {
  > a {
    color: #ccc;
    display: block;
    margin-bottom: 1px;
    padding: 10px 18px;
    &:hover,
    &:active {
      color: #333;
    }
  }
}

.site-menu-item.current > a {
  color: #333;
}

/* =Overlay toggle
----------------------------------------------------- */
.toggle-overlay-checkbox {
  display: none;
}

.toggle-overlay-label {
  @extend %transition;
  bottom: 0;
  left: 0;
  opacity: 0;
  pointer-events: none; // Important to prevent unwanted triggering
  position: fixed;
  right: 0;
  top: 0;
  z-index: -1;
}

/* Display menu overlay */
.toggle-menu-checkbox:checked ~ .toggle-overlay-label {
  background: rgba(0, 0, 0, .5);
  opacity: 1;
  pointer-events: auto;
  z-index: 1;
}


/* =Menu toggle
----------------------------------------------------- */
.toggle-menu-checkbox,
.toggle-menu-label {
  display: none;
}

.toggle-menu-checkbox:checked ~ .site-menu {
  left: 0;
  z-index: 2;
          box-shadow: $menu-shadow;
     -moz-box-shadow: $menu-shadow;
  -webkit-box-shadow: $menu-shadow;
}


.toggle-overlay-checkbox:checked ~ .site-menu {
  left: -$menu-width;
}

.toggle-menu-label {
  cursor: pointer;
  display: block;
  padding: 0 0 0 20px;
  position: absolute;
  left: 20px;
  top: 24px;
  user-select: none;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  &:before {
    background: $navbar-color;
    content: "";
    height: 2px;
    position: absolute;
    left: 0;
    top: 1px;
    width: 1em;
    box-shadow: 0 $toggle-stripe-2 0 0 $navbar-color, 0 $toggle-stripe-3 0 0 $navbar-color;
    -moz-box-shadow: 0 $toggle-stripe-2 0 0 $navbar-color, 0 $toggle-stripe-3 0 0 $navbar-color;
    -webkit-box-shadow: 0 $toggle-stripe-2 0 0 $navbar-color, 0 $toggle-stripe-3 0 0 $navbar-color;
   
  }

  &:after {
    color: $navbar-color;
    content: "Menu";
    display: inline-block;
    line-height: 1;
    margin-top: -9px;
    padding-right: 1.4em;
    text-align: center;
    text-transform: uppercase;
    vertical-align: middle;
    border-radius: 2px 2px 2px 2px;
  }
}

.toggle-menu-checkbox:checked ~ .toggle-menu-label {
  &:after {
    content: "Menu";
    color: #ccc !important;
  }

  &:before {
    background: #ccc;
    box-shadow: 0 $toggle-stripe-2 0 0 #ccc,
      0 $toggle-stripe-3 0 0 #ccc;
  }
}