p {
    max-width: 40em;
    margin: 1em auto
    }
h1 {
    max-width: 19em
    }
h2 {
    max-width: 23em
    }
h1, h2 {
    margin: 1em auto;
    text-align: center
    }
hr {
    width: 50%
    }
.important {
    font-weight: bold;
    text-align: center
    }
p.txt, div.etext p, div.etext h2 {
    max-width: 40em;
    margin: 2em auto;
    font-family: monospace
    }
div.etext h2 {
    max-width: 23em
    }
p.txt-fullyjustified {
    text-align: justify
    }
p.txt-indent {
    max-width: 32em
    }
.toc {
    margin: auto;
    padding: 1em;
    max-width: 32em;
    border: 1px solid #fff
    }
.toc .toc-header {
    margin: 1em;
    border-bottom: 1px solid #ddd;
    padding-bottom: 1em;
    text-align: center;
    font-weight: bold
    }
div.gallery {
    text-align: center
    }
div.gallery .fig {
    display: inline-block;
    margin: 0 auto;
    text-align: center
    }
div.gallery .fig img {
    display: inline;
    margin-bottom: 0;
    padding-bottom: 0
    }