/**/
.chapter {
    text-align: center;
    color: navy
    }
p {
    text-align: justify
    }
h2 {
    text-align: center
    }
h3 {
    text-align: center
    }
hr {
    width: 50%;
    text-align: center
    }
body {
    margin-left: 10%;
    margin-right: 10%
    }
hr.full {
    width: 100%;
    margin-top: 3em;
    margin-bottom: 0;
    margin-left: auto;
    margin-right: auto;
    border-width: 4px 0 0 0;
    /* remove all borders except the top one */
    border-style: solid;
    border-color: #000;
    clear: both
    }
pre {
    font-size: 80%
    }
/**/