#cabecera{
position: absolute;
top:2%;
left:2%;
height:10%;
width:93%;
}
#indice{
position: absolute;
top:15%;
left:2%;
height:10%;
width:93%;
background:#F5BCA9;
}
#contenido{
position: absolute;
top:30%;
left:10%;
width:85%;
height:75%;
background: #FAFAFA;
}