* {margin:0px ; padding:0px ; border: 0px}
body { background-color: #030629 ; text-align: center }
#fondo { width:800px ; height:600px ;
			   float: center ;
         background-image: url(objetos/portada.png) ;
			   background-repeat: no-repeat }
#entrar { text-align: right ;
					margin-right:55px ;
				  margin-top:0px }
#fondo-presentacion { background-image: url(objetos/fondo-presentacion.png) ; background-repeat: no-repeat ;
							  width:510px ; height:290px ; 
								margin-top:250px ; margin-left:170px ; padding:15px 10px 10px 10px ; border: 0px ; 
								text-align: center}
#presentacion { }