// The project function defines how your document looks.
// It takes your content and some metadata and formats it.
// Go ahead and customize it to your liking!
#let project(title: "", authors: (), body) = {
  // Set the document's basic properties.
  set document(author: authors, title: title)
  set page(paper: "us-letter", numbering: "1", number-align: center)
  set text(font: "Linux Libertine", lang: "en")

  // Headers
  set heading(numbering: "I.A.1.")
  show heading: it => locate(loc => {
    // Find out the final number of the heading counter.
    let levels = counter(heading).at(loc)
    let deepest = if levels != () {
      levels.last()
    } else {
      1
    }

    set text(10pt, weight: 400)
    if it.level == 1 [
      // First-level headings are centered smallcaps.
      #set align(center)
      #show: smallcaps
      #set text(size: 14pt)
      #v(20pt, weak: true)
      #if it.numbering != none {
        numbering("I.", deepest)
        h(5pt, weak: true)
      }
      #it.body
      #v(13.75pt, weak: true)
    ] else if it.level == 2 [
      // Second-level headings are run-ins.
      #set par(first-line-indent: 0pt)
      #set text(style: "italic")
      #set text(size: 12pt)
      #v(12pt, weak: true)
      #if it.numbering != none {
        numbering("A.", deepest)
        h(7pt, weak: true)
      }
      #it.body
      #v(10pt, weak: true)
    ] else [
      // Third level headings are run-ins too, but different.
      #if it.level == 3 {
        numbering("1)", deepest)
        [ ]
      }
      _#(it.body):_
    ]
  })

  // Title row.
  align(center)[
    #block(text(weight: 700, 1.75em, title))
  ]

  // Author information.
  pad(
    top: 0.5em,
    bottom: 0.5em,
    x: 2em,
    grid(
      columns: (1fr,) * calc.min(3, authors.len()),
      gutter: 1em,
      ..authors.map(author => align(center, strong(author))),
    ),
  )

  // Main body.
  set par(justify: true)

  body
}