New Post: Category Menu CSS to create nicer menu

ul.treeview>li.ext>.ext-r,
ul.treeview>li.ext>.ext-l,
ul.treeview>li.ext>.ext-m,
ul.treeview>li.ext>.ext-off
{
   display: none;
   z-index: 12;
   -webkit-box-sizing: border-box;
   -moz-box-sizing: border-box;
   box-sizing: border-box;
}

.desktop ul.treeview>li.ext>ul 
{
   z-index: 13;
}

.desktop ul.treeview>li.ext.ext-r:hover>.ext-r,
.desktop ul.treeview>li.ext.ext-l:hover>.ext-l
{
   position: absolute;
   display: block;
   overflow: hidden;
   /* size of radius 
   * if size if 0 we should now generate script 
   * that adds ext-r and ext-m divs
   */
  height: 6px;
   top: 100%;
   padding-top: 1px;
   margin-top: -1px;
/* border width + shadow */}

.desktop ul.treeview>li.ext:hover>.ext-r:before,
.desktop ul.treeview>li.ext:hover>.ext-l:before
{
   position: absolute;
   content: ' ';
   top: 0;
   /* border + shadow */
  bottom: -1px;
   background-color: #C3D6E9;
   border: 1px Dotted rgba(62, 113, 168, 0.9);
   box-shadow: 0 0 0 rgba(0, 0, 0, 0.8);
}

.desktop ul.treeview>li.ext.ext-r:hover>.ext-r
{
   left: 100%;
   right: auto;
   padding-left: 0;
   margin-left: 0;
   padding-right: 1px;
   margin-right: -1px;
/* only shadow */}

.desktop ul.treeview>li.ext.ext-r:hover>.ext-r:before
{
   right: 0;
   left: -1px;
   border-top-left-radius: 0;
   border-top-right-radius: 3px;
}

.desktop ul.treeview>li.ext.ext-l:hover>.ext-l
{
   right: 100%;
   left: auto;
   padding-right: 0;
   margin-right: 0;
   padding-left: 1px;
   margin-left: -1px;
/* only shadow */}

.desktop ul.treeview>li.ext.ext-l:hover>.ext-l:before
{
   right: -1px;
   left: 0;
   border-top-right-radius: 0;
   border-top-left-radius: 3px;
}

.desktop ul.treeview>li.ext:hover>.ext-m, 
.desktop ul.treeview>li.ext:hover>.ext-off 
{
   position: absolute;
   display: block;
   overflow: hidden;
   height: 5px;
   top: 100%;
}

.desktop ul.treeview>li.ext.ext-r:hover>.ext-m 
{
   /* shadow offset */
  left: -0;
   right: 0;
   /* shadow offset */
  padding-right: 0;
   padding-left: 0;
}

.desktop ul.treeview>li.ext:hover>.ext-off 
{
   /* shadow offset */
  left: -0;
   right: -0;
   /* shadow offset */
  padding-left: 0;
   padding-right: 0;
}

.desktop ul.treeview>li.ext.ext-l:hover>.ext-m
{
   /* shadow offset */
  right: -0;
   left: 0;
   /* shadow offset */
  padding-left: 0;
   padding-right: 0;
}

.desktop ul.treeview>li.ext.ext-l.ext-r:hover>.ext-m
{
   /* shadow offset */
  right: -0;
   left: -0;
   /* shadow offset */
  padding-left: 0;
   padding-right: 0;
}

.desktop ul.treeview>li.ext:hover>.ext-m:before, 
.desktop ul.treeview>li.ext:hover>.ext-off:before 
{
   position: absolute;
   content: ' ';
   top: -1px;
   bottom: -1px;
   /* shadow offset */
  background-color: #C3D6E9;
   border: 1px Dotted rgba(62, 113, 168, 0.9);
   box-shadow: 0 0 0 rgba(0, 0, 0, 0.8);
}

.desktop ul.treeview>li.ext.ext-r:hover>.ext-m:before
{
   right: -1px;
   left: 0;
}

.desktop ul.treeview>li.ext.ext-l:hover>.ext-m:before
{
   left: -1px;
   right: 0;
}

.desktop ul.treeview>li.ext.ext-l.ext-r:hover>.ext-m:before
{
   left: -1px;
   right: -1px
;
}