nav ul:after {
    content: "";
    clear: both;
    display: block;
}
 
nav ul li {
    float: left;
}
 

 
nav ul li a {
 
    display: block;
    padding: 15px 10px;
    text-decoration: none;
    color: #fff;
 
}
 
nav ul li a:hover{
 
    color: #fff;
 
}
 
nav ul ul {
 
    display: none;
    padding: 0;
    position: absolute;
    top: 100%;
    max-width: 300px;
    width: auto;
 
}
 
nav ul ul li {
 
    float: none;
    border-bottom: 1px solid rgba(0,0,0,.2);
    position: relative;
 
}
 
nav ul li:hover > ul {
 
    display: block;
 
}
 
nav ul ul li a {
 
    padding: 10px 40px;
    color: #fff;
 
}
 
nav ul ul li a:hover {
 

 
}
 
nav ul ul ul {
 
    position: absolute;
    left: 100%;
    top:0;
    width: 200px;
 
}