body {background-image: url(imagenes/fondo.jpg)}

header{background-color: cadetblue;
    margin: 5rem;
    text-align: center;
    padding: 0.4rem 1rem 0.4rem 0.4rem;  
}
section{font-family: sans-serif;
font-size: 0.8rem;
padding:0.4rem;
    margin 1rem;
    position: relative;
    float: left;}

footer {background-color: cadetblue;
    margin-top: 1rem;
    float: right;
    margin; 5rem;
    font-size: 0.8rem;
text-align: center;
}


img {position: relative;float:left ;}

.foto {position: relative; float: left;}

nav ul li{
    float: left;
    list-style-type: none;
    padding: 0.5rem 0.5rem 0.5rem 0.5rem;
    background-color: darksalmon; 
    font-family: sans-serif;

    }

.contenedor {
    background-color: darksalmon;
    width: 100%;
    position: relative;
    float: left;
    margin-top: 1rem;
     margin: 0.4rem;
    text-align: center;
}