I have successfully implemented borders in the design, and you can view it in action by visiting the following link:
http://jsfiddle.net/HAZKh/39/
One thing to note is that I have currently set the border color to red for all elements. If you wish to customize the color for individual items, you will need to define a special border color style for each nth-child element within the navigation UL section.
Here are the specific changes I made:
.header .menu-bar a {
text-align:center;
display:block;
color: #989898;
margin: 0 auto
font-size: 20px;
font-weight: 100;
text-decoration: none;
border-bottom: solid 1px red;
padding-right: 32px;
padding-left: 0px;
}
Additionally,
.header .menu-bar li {
float: left;
border:medium #0F0;
/* padding: 0 32px; */
padding-left: 32px;
}