nav {
    border-radius: 5px;
	z-index: 10002;
    background-color: #333;
    font-family: 'Roboto', sans-serif;
    position: fixed;
    top: 0;
    width: auto;
}
nav ul {
		margin:0;
		padding:0;
		list-style:none;
}
nav ul li {
        float:left;
}
nav ul li a {
        float: left;
        color:#fff;
        padding: 10px 20px;
        text-decoration:none;
        border-radius: 5px;
}
nav li ul {
        background-color: #333;
        position: absolute;
        border-radius: 5px;
        left: -999em;
        margin: 40px 0 0;
        width: 150px;
        z-index: 10001;
}
nav li ul a {
        background: none;
        border: 0 none;
        margin-right: 0;
        width: auto;
        border-radius: 5px;
}
nav li:hover ul {
        left: auto;
}
nav li li ul {
        visibility:hidden;
}
nav li li:hover ul {
        visibility:visible;
}