*{
    background-image: url(fondo.jpg);
    background-size: 100rem;
}
body
{
    text-align: center;
}
h2{
    background: black;
    color:white;
    padding: 10px;
    margin: 1%;
}
section{
    background: black;
    color:white;
    margin: 1%;
    padding: 10px;
}
aside{
    width: 20%;
    background:black;
    padding: 0px;
    float: right;
    height: 900%;
    margin: 10px;
}