CSS coding

body{
padding: 0;
margin: 5px auto;
overflow-y: scroll;
font-family: Arial;
font-size: 18px;
position: relative;
background-color: #F5F5F5;
}

#nav{

background-color: #222;

}

#nav_wrapper{
width: 960px;
margin: 0 auto;
text-align: left;

}

#nav ul{
list-style-type: none;
padding: 0;
margin: 0;
position: relative;
transition:1.0s;
}

#nav ul li{
display: inline-block;
        transition:0.5s;

}

#nav ul li:hover {
background-color: #333;
background:#999;
    border-color:#6E67A6;
    color:#fff;

}

#nav ul li img{
vertical-align: middle;
padding-left: 5px;

}

#nav ul li a,visited{
color: #ccc;
display: block;
padding: 10px;
text-decoration: none;
}

#nav ul li a:hover{
color: #ccc;
text-decoration: none;
color: #333;
}

#nav ul li:hover ul{
display: block;
color: #333;
}

#nav ul ul {
display: none;
position: absolute;
background-color: #333;
border: 5px solid #222;
border-top: 0;
margin-left: -5px;
min-width: 200px;
}

#nav ul ul li{
display: block;
}

#nav ul ul li a,visited{

color: #ccc;

}

#nav ul ul li a:hover{
color: #333;
}