BODY {
   background: #FFFFFF;
   margin: 0px 0px 0px 0px;
}
.cabecera{
   display: none; 
}
.logo_imprimir{
   visibility: visible;
   display: block;
   margin-bottom: 30px;
   
} 
.user{
   display: none; 
}
.paneles {
   display: none; 
}
.contenido {
   display: block;
   width: 650px;
   hight: 1000px;
   margin: auto;
   float: left;
}
.pie{
   display: none; 
}