/* CSS Document */
body{ 
background-color:#000000;
margin: 0px;
}
#contenido{
position: absolute;
left: 50%;
top: 50%;
width: 100px;
height: 100px;
margin-left: -50px; 
margin-top: -50px;  
}
a, a:hover, a:active; a:link  {
color:#000000;
text-decoration:none
}