// Setup special styling to improve the conversion to plain text before checking with LanguageTool.
#let lt(overwrite: false, seperate-sections-level: 3) = {
  // only apply the styling if overwrite is true or the spellcheck input exists
  if not sys.inputs.at("spellcheck", default: overwrite) {
    return doc => doc
  }
  return doc => {
    // replace math with
    // inline: 0 (smaller size to avoid line height changes)
    // block: nothing
    show math.equation.where(block: false): it => text("0", size: 0.8em)
    show math.equation.where(block: true): it => []

    // autogenerated and a lot of names, just remove it
    show bibliography: it => []

    // setup consisting line spacing
    set par(justify: false, leading: 0.65em, hanging-indent: 0pt)

    // avoid page breaks
    set page(height: auto)
    show block: it => it.body

    // remove page numbering
    show page: set page(numbering: none)

    // split pages before important headings
    show heading: it => if it.level <= seperate-sections-level {
      pagebreak() + it
    } else {
      it
    }

    doc
  }
}