p.center {
    text-align: center
    }
hr.tb {
    border: none;
    border-bottom: 1px solid black;
    width: 40%
    }
p.caption {
    text-align: center;
    margin-left: 20%;
    margin-right: 20%
    }
h2.chapter {
    font-size: 1.2em;
    text-align: center;
    margin: 2em auto 1em auto;
    font-weight: normal
    }
div.bq {
    margin-left: 10%;
    margin-right: 10%
    }