#header {
    margin: auto;
    width: 600px;
   font-family: 'clear_sansbold';
}

ul, ol {
    list-style: none;
}

.nav li a {
    background-color: #255397;
    color: #fff;
    text-decoration: none;
    padding: 10px 15px;
    display: block;
}

.nav li a:hover {
    background-color: dodgerblue;
}

.nav > li {
    float: left;
}
.nav li ul {
   display: none;
    position: absolute;
    min-width: 140px;
}

.nav li:hover > ul {
    display: block;
}


.logogrupal{
    margin: 2rem;
    padding: 3rem;
    font-family: sans-serif;
    text-decoration: none;   
}

body {
    margin: 1rem;
    background-color: white;
    padding: 1rem;
    background-size: auto;
    text-align: center;
    margin-top: 0;
    width: inherit;
    font-family: calabri;
}

header {
    background: black;
    color: white;
    max-width: 100%; 
    min-height: 80px;
    margin-top:50px;
    font-size: 50px; 
    text-align: center;
    padding: 1px;
}

footer {
    background: darkgray;
    color: white;
    font-family: sans-serif;
    text-align: center;
    margin: auto;
    width: 75%;
}

.contenedorfooter{
    background-color: darkgray;
    padding-bottom: 0.3rem;
    padding-top: 0.3rem;
    text-align: center;
}

.materia > h2 {
color: dodgerblue;
    font-size: 55px;
    font-family: 'droidsans-bold';
     font-weight: normal;
    font-style: normal;
}

.catedra > h1 {
    color: darkgray;
    font-family: 'clear_sans_lightregular';
}

.catedra > h2 {
    color: darkgray;
    font-family: 'clear_sans_lightregular'';
}

.catedra > h3 {
    color: darkgray;
    font-family: 'clear_sansbold';
}

h4 {
    color: #73b7fa;
}

header {
    margin: 0rem;
    padding:  0rem;
}

hr {
    width: 50%;
    outline-color: dodgerblue;
    outline-offset: 
}

p {
    font-size: 0.75rem;
}