\Preamble{xhtml}

\Configure{tableofcontents*}{chapter,section,subsection}

\Css{html {
    width: 100vw;
    overflow-x: hidden;
}}

\Css{body {
    max-width: 50rem;
    box-sizing: border-box;
    padding: 1rem;
    margin: 0 auto;
    overflow-x: hidden;
}}

\Css{div.author {
    white-space: normal;
}}

\Css{img.math {
    height: 1rem;
    vertical-align: top;
}}

\Css{figure, .fancyvrb, .verbatim {
    margin-inline: 0;
    overflow-x: auto;
}}

\Css{.ecrm-0500 { 
    font-size: 70\%;
    font-style: italic; 
    color: gray;
    -webkit-user-select: none;
    -moz-user-select: none;
    -o-user-select: none;
    user-select: none;
}}

\Css{.ecrm-0500:after {
    content:" ";
    white-space: pre;
    -webkit-user-select: none;
    -moz-user-select: none;
    -o-user-select: none;
    user-select: none;
}}

\begin{document}
\EndPreamble