body{
    background-color: #f8fafe;
    font-family: sans-serif;
    color: #003245
}
h1{
    text-align: center;
}
ul{
    list-style-type: none;
    display: flex;
    align-items: stretch;
}
ul li{
    flex-grow: 1;
}
footer{
    border-top-style: solid;
    border-color: #716d91;
    padding-top: 0.5em;
}
a{
    text-decoration: none;
    display: block;
    background-color: rgb(92, 115, 162);
    color: white;
    margin-right: 1em;
    padding: 1em;
}
a:hover{
    background-color: rgb(48, 40, 119);
}
.contenido{
    margin-left: 2em;
    width: 90%;
}
.sangria{
    text-indent: 1cm;
}