body {
    margin-left: 20%;
    margin-right: 20%;
    text-align: justify
    }
h1, h2, h3, h4, h5, h6 {
    color: green;
    text-align: center
    }
blockquote {
    font-size: 0.9em
    }
p.poem {
    text-align: center
    }
p.external {
    font-weight: bold
    }
p.footnote {
    font-size: 90%;
    text-indent: 0%;
    margin-left: 10%;
    margin-right: 10%;
    margin-top: 1em;
    margin-bottom: 1em
    }