CSS Only Side Sliding Menu

A pure CSS / CSS3 side navigation that slides out a vertical, off-screen menu on mouse hover.

How to use it:

Create a list of links for the side navigation.

<div class="menu">
  <div class="title">MENU</div>
  <ul class="nav">
    <li><a href="#">Home</a></li>
    <li><a href="#">About</a></li>
    <li><a href="#">Work</a></li>
    <li><a href="#">Resources</a></li>
    <li><a href="#">Contact</a></li>
  </ul>
</div>

The core CSS / CSS3 styles.

.menu {
  font-weight: 100;
  background: #efefef;
  width: 150px;
  height: 100%;
  padding-left: 50px;
  position: fixed;
  z-index: 100;
  -webkit-box-shadow: -3px 0px 5px 0px rgba(0,0,0,0.2);
  box-shadow: -3px 0px 5px 0px rgba(0,0,0,0.2);
  right: -130px;
  transition: all .3s;
  -webkit-transition: all .3s;
  color: #222
}
.menu:hover, .menu:focus {
  transform: translate3d(-130px, 0, 0);
  animation-timing-function: 1s ease-in
}
.menu .title {
  top: 50%;
  position: absolute;
  top: 50%;
  -webkit-transform: translateY(-50%);
  -ms-transform: translateY(-50%);
  transform: translateY(-50%);
  transform: rotate(270deg);
  left: 10px;
  font-weight: 800;
  font-size: 15px
}
.menu .nav {
  position: absolute;
  top: 50%;
  -webkit-transform: translateY(-50%);
  -ms-transform: translateY(-50%);
  transform: translateY(-50%);
  font-weight: 100
}
.menu .nav li {
  padding-bottom: 30px;
  list-style-type: none
}
.menu .nav li a {
  display: block;
  text-decoration: none;
  color: inherit;
  transition: all .3s;
  -webkit-transition: all .3s
}
.menu .nav li a:hover { color: #aaa }