*{
    padding:0px;
    margin:0px;
}

#header{
    margin: auto;
    width: 500px;
}

ul, ol{
    list-style: none;
}

.nav li a{
    color: #fff;
    text-decoration: none;
    display: block;
    padding: 10px 15px;
    display: block;
}

.nav li a:hover{
    background-color: #000;
    color:  #fff;
}

.nav > li{
    float:left;
}

.nav li ul{
    display: none;
    position: absolute;
    min-width: 140px;
}

.nav li:hover > ul{
    display: block;
    background-color: #f36433;
}

.nav li ul li{
    position: relative;
}

.nav li ul li ul{
    right: -140px;
    top: 12px;
}