CSS3 animated vertical slanted menu

CSS3 lets you animate virtually any CSS property, so instead of directing changing into a property, the browser slowly morphs into the new value instead. This is done via CSS3's "transition" property, which is supported in IE10+, FF3.5+, Chrome/Safari, and Opera 10+. With that introduction out of the way, this is a vertical list menu that uses CSS3 animation to gradually expand the selected menu item horizontally so to highlight it. It also employs the CSS border trick to create a cross browser slanted left edge. The final result is a sleek vertical list menu that uses nothing but pure HTML markup!

See Demo

The CSS

<style>

ul.svertical{
width: 200px; /* width of menu */
overflow: auto;
background: black; /* background of menu */
margin: 0;
padding: 0;
padding-top: 7px; /* top padding */
list-style-type: none;
}

ul.svertical li{
text-align: right; /* right align menu links */
}

ul.svertical li a{
position: relative;
display: inline-block;
text-indent: 5px;
overflow: hidden;
background: rgb(127, 201, 68); /* initial background color of links */
font: bold 16px Germand;
text-decoration: none;
padding: 5px;
margin-bottom: 7px; /* spacing between links */
color: black;
-moz-box-shadow: inset -7px 0 5px rgba(114,114,114, 0.8); /* inner right shadow added to each link */
-webkit-box-shadow: inset -7px 0 5px rgba(114,114,114, 0.8);
box-shadow: inset -7px 0 5px rgba(114,114,114, 0.8);
-moz-transition: all 0.2s ease-in-out; /* CSS3 transition of hover properties */
-webkit-transition: all 0.2s ease-in-out;
-o-transition: all 0.2s ease-in-out;
-ms-transition: all 0.2s ease-in-out;
transition: all 0.2s ease-in-out;
}

ul.svertical li a:hover{
padding-right: 30px; /* add right padding to expand link horizontally to the left */
color: black;
background: rgb(153,249,75);
-moz-box-shadow: inset -3px 0 2px rgba(114,114,114, 0.8); /* contract inner right shadow */
-webkit-box-shadow: inset -3px 0 5px rgba(114,114,114, 0.8);
box-shadow: inset -3px 0 5px rgba(114,114,114, 0.8);
}

ul.svertical li a:before{ /* CSS generated content: slanted right edge */
content: "";
position: absolute;
left: 0;
top: 0;
border-style: solid;
border-width: 70px 0 0 20px; /* Play around with 1st and 4th value to change slant degree */
border-color: transparent transparent transparent black; /* change black to match the background color of the menu UL */

}

</style>

The HTML

<ul class="svertical">
<li><a href="http://www.dynamicdrive.com/">Dynamic Drive</a></li>
<li><a href="http://www.dynamicdrive.com/style/" >CSS Examples</a></li>
<li><a href="http://www.javascriptkit.com/jsref/">JavaScript Reference</a></li>
<li><a href="http://www.javascriptkit.com/domref/">DOM Reference</a></li>
<li><a href="http://www.cssdrive.com">CSS Drive</a></li>
<li><a href="http://www.codingforums.com/">Coding Forums</a></li>       
</ul>