Navigation menu with LESS

menu.less

@borderColor: #eee;

.main-navigation {
    clear: both;
    display: block;
    float: left;
    width: 100%;
    border-top: 1px solid @borderColor;
    border-left: 1px solid @borderColor;
    border-right: 1px solid @borderColor;

    ul {
        list-style: none;
        margin: 0;
        padding-left: 0;

        ul {
            -moz-box-shadow: 0 3px 3px rgba(0,0,0,0.2);
            -webkit-box-shadow: 0 3px 3px rgba(0,0,0,0.2);
            box-shadow: 0 3px 3px rgba(0,0,0,0.2);
            display: none;
            float: left;
            position: absolute;
                top: 2em;
                left: 0;
            z-index: 99999;
            background: #fff;

            a {
                width: 200px;

                &:hover {

                }
            }

            ul {
                left: 100%;
                top: 0;
            }

            li {
                border-bottom: 1px solid @borderColor;
                border-right: none;
            }

            &:hover > a {

            }
        }

        li:hover > ul {
            display: block;
        }
    }

    li {
        float: left;
        position: relative;
        border-right: 1px solid @borderColor;

        &:hover > a {

        }

        &.current_page_item a {

        }

        &.current-menu-item a {
            background: @borderColor;
        }
    }

    a {
        display: block;
        text-decoration: none;
        padding: 5px 10px;
    }
}