*{margin:0;padding: 0; box-sizing: border-box;}

/* Estilos Generales */

.contenedor{max-width: 80rem; margin: auto}
.cabezal {background-color: #000000 ;max-width: 100%; margin-top; 1rem;margin-bottom;1rem ;margin-left; 1rem; 2rem margin-right;}
.staff {margin-left:0%;margin-right:auto}
body {font-family:'Verdana';background-color:#005670;height: 100%; margin: o;text-align:center;width: 100% }

h1 {margin: 1rem 0rem 1rem 0rem; color:#fffdfc; font-size 2rem; text-align: center; font-family:'Tahoma'; background-color: #0085ad;}
h2 { margin: 2rem; padding; 2rem; font-family:'Tahoma'}



/* Estilos nav */
nav{ text-align: center;}
nav ul li{border-radius: 2rem; list-style-type: none; display: inline-block; background: #5a5252; margin: auto;padding: 1% 3% 1% 3%;}
nav ul li a{ color: #ffffff; text-decoration:none;text-align: center; padding: 1% 2% 0% 2%; display: inline-block; font-size: 1.2rem;  }
nav ul li:hover{ background: #000000;}
nav ul li a:hover{ text-decoration:underline; color:antiquewhite}

div img {
    height: 20rem; 
    width: 90rem;
    border: 2px solid;
    border-color: azure;
}




/* Estilos article */
.nivel ul h3 { 
    text-align: center;
    background-color: #005670; 
    border: 3px solid; 
    border-color: #0085ad;
    color:azure;}
article {
    width: 100%;
    margin:2rem 6rem 1rem 1rem;}
article h3{
    text-align:le; 
    color: #ffffff; 
    text-decoration: none;
    font-size: 1.2rem;
    background: #00205b; 
    margin: 2rem 4rem 1rem 0rem; 
    padding; 1rem ;
    width: 15rem; }
.nivel li {
    margin-left:2rem; 
    box-sizing: border-box;
    text-align: left;
    font-size: 1rem}

/* estructura */
section.contenedor {
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: flex-start;
    align-items: stretch;
    align-content: stretch;
}
.contenedor h1 { margin-left: auto;margin-top: 2rem
    
}
article h3{ color: #c67e2b; text-decoration: none;font-size: 1.3rem; padding:1rem 0rem 1rem 1rem ; }


/* Estilos footer */

footer{ margin: 10rem 0rem 0rem 0rem; color: #ffffff; font-size:10pt;line-height:15pt; text-decoration: none; padding: 3rem; background: #363636
}