body {
    margin-left: 10%;
    margin-right: 10%
    }
h1, h2, h3, h4, h5, h6 {
    text-align: center
    }
p {
    text-align: justify
    }
blockquote {
    text-align: justify
    }
hr {
    width: 50%;
    text-align: center
    }
hr.full {
    width: 100%
    }
hr.short {
    width: 20%;
    text-align: center
    }
.note {
    font-size: 0.8em;
    margin-left: 10%;
    margin-right: 10%
    }
.footnote {
    font-size: 0.8em;
    margin-left: 10%;
    margin-right: 10%
    }
.izquierda {
    font-size: 0.9em
    }
.derecha {
    font-size: 0.9em
    }