div.Navigation
{
    width:25%;
    
    margin:0px;
    padding:0px;
    
    float:left;
}

@media (max-width:750px)
{
    div.Navigation
    {
        width:100%;
        
        float:none;
    }
}

div.Navigation div.SousNavigation
{
    margin:0px;
    margin-left:20px;
    margin-right:20px;
    padding:0px;
    padding-bottom:0.1px;
}