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

 {
background-color: black;    
background-image: url('Bild02x.jpg');
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-position: center;
}
h1 {
    font-size: 150%;color: #ffffff;text-align: center;}

p.ez {
     font-size: 125%;color: #ffffff;text-align: center;
}

p.ex {
    font-size: 100%;color:#ffffff;text-align: center;
}

/* unvisited link */
a:link {
    color: #2abaf6; }

/* visited link */
a:visited {
    color: #2abaf6; }

/* mouse over link */
a:hover {
    color: #ffffff; }

/* selected link */
a:active {
    color: #2abaf6; }