PdfCSS:Tools shape practice shapes tools...

@page{
    size: A7; /* 74x105mm */
    
    @bottom-center{
        content: counter(page);
    }
}
@page:left{
    margin-top: 4mm;
    margin-bottom: 10mm;
    margin-left: 6mm;
    margin-right: 8mm;
}
@page:right{
    margin-top: 4mm;
    margin-bottom: 10mm;
    margin-left: 8mm;
    margin-right: 6mm;
}
@page image{
    @bottom-center{
        content: unset;
    }
}

body{
    font-family: serif;
    font-size: 10.5pt;
    line-height: 1.25;
}
div#cover{
    break-after: always;
}
div.section{
    break-before: always;
}
div.section#references{
    columns: 2 auto;
    column-gap: 3mm;
    column-fill: auto;
    font-size: small;
    line-height: 1.15;
}
div#toc ul > li.tocsection-1,
div#toc span.tocnumber{
    display: none;
}
h2{
    margin-top: 0;
}
a{
    word-break: break-word;
}
/* images */
div.center{
}
div.thumb{
    break-before: always;
    break-inside: avoid;
    page: image;
    max-width: 50mm;
    display: block;
    margin: 0 auto 1em;
}
div.thumb div.thumbinner{
    width: unset !important;
}
div.thumb img{
    max-width: 100%;
    height: auto;
}
div.thumbcaption{
    font-size: 7.5pt;
    line-height: 1.1;
}