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#header {
position: relative;
height: 100px;
width: 100%;
display: block;
overflow: auto;
text-align: center;
margin: 0px 0px 0px 0px;
}
#header h1 {
font-family: “Riesling”;
font-size: 60px;
font-weight: normal;
letter-spacing: 1px;
text-transform: lowercase;
margin: 0px auto 0px auto;
clear: both;
color: #111111;
padding: 0px;

OK, I changed it from 80 to 100px and the h1 from 50 to 60px. It looks better, but still the whole block is not centered.

Thanks for helping me out!