#nav{
    list-style:none;
    font-weight:bold;
    margin-bottom:20px;
padding-left:60px;
    float:center; /* Clear floats */
    width:100%;
    /* Bring the nav above everything else--uncomment if needed.
    position:relative;
    z-index:5;
    */
}
#nav li{
    float:left;
    margin-right:100px;
    position:relative;
}
#nav a{
    display:block;
    padding:5px;
    color:#fff;
    background:#609163;
    text-decoration:none;
}
#nav a:hover{
    color:#fff;
    background:#FF6A00;
    text-decoration:underline;
}

/*--- DROPDOWN ---*/
#nav ul{
    background:#ff; /* Adding a background makes the dropdown work properly in IE7+. Make this as close to your page's background as possible (i.e. white page == white background). */
    background:rgba(255,255,255,0); /* But! Let's make the background fully transparent where we can, we don't actually want to see it if we can help it... */
    list-style:none;
    position:absolute;
    left:-9999px; /* Hide off-screen when not needed (this is more accessible than display:none;) */
}
#nav ul li{
    padding-top:1px; /* Introducing a padding between the li and the a give the illusion spaced items */
    float:none;
}
#nav ul a{
    white-space:nowrap; /* Stop text wrapping and creating multi-line dropdown items */
}
#nav li:hover ul{ /* Display the dropdown on hover */
    left:0; /* Bring back on-screen when needed */
}
#nav li:hover a{ /* These create persistent hover states, meaning the top-most link stays 'hovered' even when your cursor has moved down the list. */
    background:#0026ff;
    text-decoration:underline;
padding-left:0;
}
#nav li:hover ul a{ /* The persistent hover state does however create a global style for links even before they're hovered. Here we undo these effects. */
    text-decoration:none;
}
#nav li:hover ul li a:hover{ /* Here we define the most explicit hover states--what happens when you hover each individual link. */
    background:#ff0060;
color:#ffff00;
}