html {
    background: url(../image/bg.jpg) no-repeat center fixed; 
    background-size: cover;
}

.centre {
    margin-left: auto;
    margin-right: auto;
    display: block
}

h1 
{
    margin-left: auto;
    margin-right: auto;
    text-align: center;
    color: yellow;
    font-family: verdana;
    font-size: 160%;
    text-shadow: 2px 2px #101010;
    
    }
    
    h2 
{
    margin-left: auto;
    margin-right: auto;
    text-align: center;
    color: yellow;
    font-family: verdana;
    font-size: 180%;
    text-shadow: 2px 2px #101010;
    
    }