megamenu.css

nav {
    width: 960px;
    margin-top: 10px;
}

#nav a {
    color: #333;
}

#nav {
    width: 100%;
    margin: 0;
    padding: 7px 6px 0;
    line-height: 100%;
    border-radius: 2em;
    -webkit-border-radius: 2em;
    -moz-border-radius: 2em;
    -webkit-box-shadow: 0 1px 3px rgba(0, 0, 0, .4);
    -moz-box-shadow: 0 1px 3px rgba(0, 0, 0, .4);
    background: #8b8b8b; /* for non-css3 browsers */
    filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#a9a9a9', endColorstr='#7a7a7a'); /* for IE */
    background: -webkit-gradient(linear, left top, left bottom, from(#a9a9a9), to(#7a7a7a)); /* for webkit browsers */
    background: -moz-linear-gradient(top, #a9a9a9, #7a7a7a); /* for firefox 3.6+ */
    border: solid 1px #6d6d6d;
}

    #nav li {
        margin: 0 5px;
        padding: 0 0 8px;
        float: left;
        position: relative;
        list-style: none;
    }
    /* main level link */
    #nav a {
        font-weight: bold;
        color: #e7e5e5;
        text-decoration: none;
        display: block;
        padding: 8px 20px;
        margin: 0;
        -webkit-border-radius: 1.6em;
        -moz-border-radius: 1.6em;
        text-shadow: 0 1px 1px rgba(0, 0, 0, .3);
        border-top: solid 1px transparent;
    }
    /* main level link hover */
    #nav .current a, #nav li:hover > a {
        background: #d1d1d1; /* for non-css3 browsers */
        filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ebebeb', endColorstr='#a1a1a1'); /* for IE */
        background: -webkit-gradient(linear, left top, left bottom, from(#ebebeb), to(#a1a1a1)); /* for webkit browsers */
        background: -moz-linear-gradient(top, #ebebeb, #a1a1a1); /* for firefox 3.6+ */
        color: #444;
        border-top: solid 1px #f8f8f8;
        -webkit-box-shadow: 0 1px 1px rgba(0, 0, 0, .2);
        -moz-box-shadow: 0 1px 1px rgba(0, 0, 0, .2);
        box-shadow: 0 1px 1px rgba(0, 0, 0, .2);
        text-shadow: 0 1px 0 rgba(255, 255, 255, .8);
    }
    /* sub levels link hover */
    #nav ul li:hover a, #nav li:hover li a {
        background: none;
        border: none;
        color: #666;
        -webkit-box-shadow: none;
        -moz-box-shadow: none;
    }

    #nav ul li a:hover {
        background: #0399d4; /* for non-css3 browsers */
        color: #fff !important;
        -webkit-border-radius: 9px;
        -moz-border-radius: 9px;
        border-radius: 9px;
        text-shadow: 0 1px 1px rgba(0, 0, 0, .1);
    }

    #nav ul li.red a:hover {
        background-color: #d31313;
    }

    #nav ul li.green a:hover {
        background-color: #10a918;
    }

    #nav ul li.grey a:hover {
        background-color: #6d6d6d;
    }

    #nav ul li.category > a, #nav ul li.category > span {
        font-weight:bold;
        background-color: transparent !important;
        border-bottom:1px dashed #888;
        border-radius:0 !important;
        margin:0 10px;
    }
    
    /* level 2 list */
    #nav div.megamenu {
        background: #ddd; /* for non-css3 browsers */
        filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffffff', endColorstr='#cfcfcf'); /* for IE */
        background: -webkit-gradient(linear, left top, left bottom, from(#fff), to(#cfcfcf)); /* for webkit browsers */
        background: -moz-linear-gradient(top, #fff, #cfcfcf); /* for firefox 3.6+ */
        display: none;
        margin: 0;
        padding: 0;
        width: 185px;
        position: absolute;
        top: 35px;
        left: 0;
        border: solid 1px #b4b4b4;
        -webkit-border-radius: 10px;
        -moz-border-radius: 10px;
        border-radius: 10px;
        -webkit-box-shadow: 0 1px 3px rgba(0, 0, 0, .3);
        -moz-box-shadow: 0 1px 3px rgba(0, 0, 0, .3);
        box-shadow: 0 1px 3px rgba(0, 0, 0, .3);
        z-index: 920;
    }

    #nav div.megamenu.col2 {
        width:370px;
    }
    #nav div.megamenu.col3 {
        width:555px;
    }
    
    #nav ul {
        margin: 0;
        padding: 0;
        width: 185px;
    }

    #nav div.megamenu > ul {
        float:left;
    }
    /* dropdown */
    #nav li:hover > div.megamenu {
        display: block;
    }

    #nav ul li {
        float: none;
        margin: 0;
        padding: 0;
    }

    #nav ul a {
        font-weight: normal;
        text-shadow: 0 1px 1px rgba(255, 255, 255, .9);
    }
    /* level 3+ list */
    #nav ul ul {
        left: 181px;
        top: -3px;
    }

    /* clearfix */
    #nav:after {
        content: ".";
        display: block;
        clear: both;
        visibility: hidden;
        line-height: 0;
        height: 0;
    }

#nav {
    display: inline-block;
}

html[xmlns] #nav {
    display: block;
}

* html #nav {
    height: 1%;
}