body {
margin:0;
padding:0;
background:#fefe00;
text-align:center; /* hack para o IE */	
	}
#tudo {
width: 760px;
margin:0 auto;			
padding: 10px;
text-align:left; /* "remédio" para o hack do IE */	
#height:100%;
	}
#conteudo {
/*padding: 5px;*/
background-color: #fdffd5;
min-height: 540px;
border-style:double;
border-width:3px;
#height:auto; 
#height:550px;
}
#obra{
    display: block;
    margin-left: auto;
    margin-right: auto;
	#text-align: center;
}