body{
font-family: Arial, Helvetica, sans-serif;
background-attachment:fixed;

}
.menu li a{
    list-style: none;
    margin: auto;
    display: block;
    padding: 20px;
}
.menu li{
    display: inline-block;
    text-align: center;
    font-size: 25px;


}
a { 
    color: white; 
    text-decoration: none; 
 }
a:hover { 
    color: yellow; 
}