body {
    margin-left: 20%;
    margin-right: 20%;
    text-align: justify
    }
p {
    text-indent: 1em;
    margin-top: 0.25em;
    margin-bottom: 0.25em
    }
h1, h2, h3, h4, h5, h6 {
    text-align: center;
    margin-left: 15%;
    margin-right: 15%
    }
hr {
    width: 50%;
    text-align: center
    }
.toc {
    margin-left: 10%;
    margin-bottom: 0.75em
    }
div.fig {
    display: block;
    margin: 0 auto;
    text-align: center
    }
pre {
    font-style: italic;
    font-size: 90%;
    margin-left: 10%
    }