CSS Menu And HTML Style Sheet

CSSMenuAndHTML.css

body 
{
    margin: 0; 
    padding: 0;
    text-align: center;
    font-family: 'Segoe UI', Arial, sans-serif;
    font-size: 10pt;
    background-color: #fff;
}
#container 
{
    margin: 0 auto;
    width: 1024px;
    text-align: left;
    background-color: #fff;
}
#container-nav
{
    margin: 0;
    padding: 0;
    float: left;
}
#container-content
{
    margin: 0;
    padding: 0;
}
#nav 
{
    margin: 0;
    padding: 0;
    list-style: none;
    background-color: #036;
    float: left;
    width: 1024px;
}
#nav li 
{
    float: left;
}
#nav li a {
    display: block;
    padding: 8px 15px;
    text-decoration: none;
    font-weight: bold;
    color: #eee;
}
#nav li a:hover 
{
    color: #036;
    background-color: #69c; 
}
div.clr
{
    clear: both;
    font-size: 0;
}