body {
    margin-left: 3em;
    margin-right: 3em
    }
p {
    text-indent: 1em;
    text-align: justify
    }
.noindent {
    text-indent: 0;
    text-align: justify
    }
.caption {
    text-align: center;
    font-size: 0.9em;
    margin-top: 0;
    margin-bottom: 2.5em
    }
.ctr {
    text-align: center;
    text-indent: 0
    }
.chapter {
    text-align: center;
    margin-top: 3em;
    font-weight: bold;
    font-size: 1.1em;
    margin-bottom: 2em
    }
ul {
    list-style-type: none;
    margin-left: -2em;
    margin-bottom: 1.5em;
    text-align: left
    }
h1, h2, h3, h4, h5, h6 {
    text-align: center;
    margin-top: 1em
    }
hr {
    text-align: center;
    width: 80%;
    margin-top: 2em;
    margin-bottom: 1em
    }
div.img {
    text-align: center;
    border: none;
    max-width: 100%;
    margin-top: 2em
    }
a:link {
    color: blue;
    text-decoration: none
    }
link {
    color: blue;
    text-decoration: none
    }
a:visited {
    color: blue;
    text-decoration: none
    }
a:hover {
    color: red
    }