#let content-to-string(content) = {
  if content.has("text") {
    content.text
  } else if content.has("children") {
    content.children.map(content-to-string).join("")
  } else if content.has("body") {
    content-to-string(content.body)
  } else if content == [ ] {
    " "
  }
}
#let conf(
  title: none,
  subtitle: none,
  authors: (),
  keywords: (),
  date: none,
  abstract: none,
  cols: 1,
  margin: (x: 1.25in, y: 1.25in),
  paper: "us-letter",
  lang: "en",
  region: "US",
  font: (),
  fontsize: 11pt,
  sectionnumbering: none,
  pagenumbering: "1",
  doc,
) = {
  set document(
    title: title,
    author: authors.map(author => content-to-string(author.name)),
    keywords: keywords,
  )
  set page(
    paper: paper,
    margin: margin,
    numbering: pagenumbering,
    columns: cols,
    )
  set par(justify: true)
  set text(lang: lang,
           region: region,
           font: font,
           size: fontsize)
  set heading(numbering: sectionnumbering)

  place(top, float: true, scope: "parent", clearance: 4mm)[
  #if title != none {
    align(center)[#block(inset: 2em)[
      #text(weight: "bold", size: 1.5em)[#title]
      #(if subtitle != none {
        parbreak()
        text(weight: "bold", size: 1.25em)[#subtitle]
      })
    ]]
  }

  #if authors != none and authors != [] {
    let count = authors.len()
    let ncols = calc.min(count, 3)
    grid(
      columns: (1fr,) * ncols,
      row-gutter: 1.5em,
      ..authors.map(author =>
          align(center)[
            #author.name \
            #author.affiliation \
            #author.email
          ]
      )
    )
  }

  #if date != none {
    align(center)[#block(inset: 1em)[
      #date
    ]]
  }

  #if abstract != none {
    block(inset: 2em)[
    #text(weight: "semibold")[$if(abstract-title)$${abstract-title}$else$Abstract$endif$] #h(1em) #abstract
    ]
  }
  ]

  doc
}