// A6 Booklet — 105×148mm
// Standard postcard size, versatile pocket book

#let page-setup(body) = {
  set page(
    width: 105mm,
    height: 148mm,
    margin: (
      top: 10mm,
      bottom: 10mm,
      inside: 12mm,
      outside: 10mm,
    ),
    numbering: "1",
    number-align: center + bottom,
  )
  body
}
