body{
    width: 960px;
    background-image: url(imagenes/fondo_body.png);
    margin: auto;
    display: block;
}
header{
    width: 960px;
    height: 300px; 
    margin-bottom: 20px;
}

main{
    display: block;
    float: left;
    padding-top: 20px;
    width: 250px;
    height: 500px;
    background-color: #c4e1cd;
    
}

nav ul{
    list-style: none;
    background-color: #000;
    width: 150;
    height: 30;
    padding-top:4px;
}
nav ul li{
    text-align: center;
    float: right;
    margin-right: 10px;
    margin-top: 6px;    
}
main div nav ul li a {
    text-decoration: none;
    color: #c4e1cd;
    margin-top: 2rem;     
}
aside{
    background-color: #c4e1cd;
    display: block;
    float: right;
    width: 710px;
    height: 500px;
    padding-top: 20px;
}
div#tps{
    margin-left: 50px;

}
.titulo{
    font-size: 20px;
}
div#texto_catedra{
    clear: both;
    margin: 15px;
    margin-top: 65px;
    font-family: "Alegreya Sans", sans-serif;
    font-size: 12;
    color: #d51d4a;
    margin-right: 40px;
    
    
}


footer{
    display: block;
    background-color:#c4e1cd;
    width: 960px;
    height: 250px;
    margin-top: 600px;
    padding-top: 20px;
    
    
}
div#nombre{
    display: block;
    width: 200px;
    float: left;
    margin-left: 550;
    margin-top: 50px;
}
div#logo_roldan{
    display: block;
    float: right;
    margin-right:50px;    
}
div#textolegal{
    display: block;
    float: left;
    font-family: "Alegreya Sans", sans-serif;
    font-size: 12;
    color: #000;
    margin-top: 10px;
    padding-top: 30px;
    margin-left: 30px;
    margin-right: 30px;
}