body, html {    
    height: 100%;
    width: 99.8%;
    text-align: center; 
        
    font-family: Helvetica,sans-serif;
    font-style: italic;
    font-size: 18px;
    background-color: DarkSlateBlue;
}

.content { /*Establecemos los parámetros del contenido*/
    height: 79%;
    margin-top: 0%; 
    margin-bottom: 1%;
    display: flex;
    flex-flow: column;   
}

#cabecera{
   flex: 1 1 10%;
   order: 1;
   margin: 1%;
   background-color: white;
   text-align: right;
   font-size: 50px;
   padding-right: 2%;
   font-family: serif;
   background-image: url("img/jazz.png");
   background-repeat: no-repeat;
   background-origin: left-bottom;
}
.content section {
    background: transparent;
    margin-right: 1%;
    margin-left: 1%;
    order: 2;
    flex: 10 1 90%;
    border: 0px;
    display: flex;
    flex-flow: column;  /*Acumulamos los elementos hacia abajo ahora*/  
}
.content section header{
    flex: 0.5 1 8%;
    order: 1;
    margin: 1% 1% 0% 1%;
    background-color:#D8D8D8;
    text-align: left;
    text-indent: 20px;
    font-style: italic;
    font-weight: bold;
    font-family: Courier;
    font-size: 32px;
}
.content section article {  
    background: white;
    flex: 6 1 70%;
    order: 2;
    margin: 1%;
    
}

.content section article p{
    text-indent: 30px;
    text-align: left;
    font-style: normal;
    font-family: Courier;
}


.content section footer{
    flex: 1 6 5%;
    order: 3;
    margin: 0% 1% 1% 1%;
    background-color:#D8D8D8;
    text-align: left;
    font-style: italic;
    text-indent: 10px;
    font-weight: bolder;
}


header, footer, nav, aside, section, article {
    border: 1px solid black;
    display: block;
    border-radius: 10px;
}


#piedepagina {
    position:fixed; 
    bottom:0;
    width: 99%;
    margin-right: 1%;
    height: 30px;
    background: darkorange;
}

nav {
    background: #707070;
    float: left;  
    width: 200px;
    height: 50%;
    border-radius: 10px;
    margin-top:0.5%;
    margin-bottom: 1%;
    font-size: 14px;
    display: block;
}