#import "@preview/cetz:0.3.3" //Grafiken

#import "@preview/marge:0.1.0": sidenote


#let pfeil_mit_xy(x,y) = {
  cetz.canvas({
  import cetz.draw: *
  
  // Das Grid (Hintergrund)
  //grid((0, -1), (4, 2), step: 0.5, stroke: gray + 0.2pt) // Hauptlinien alle 0.5 Einheiten
  //grid((-1, -1), (3, 2), step: 0.1, stroke: gray.lighten(50%) + 0.1pt) // Sehr feine Linien alle 0.1

  line((0.5,1),(3,1), name: "top", mark: ( end: "stealth", fill: black) ) // Obere Gerade
  content((rel: (1em, 0), to: "top.end"), 
    box(fill: white, inset: 0pt)[#y], 
    anchor: "center")
  content((rel: (0, 0), to: "top.mid"), 
    box(fill: white, inset: 0pt)[#x], 
    anchor: "center")

}) }

#let pfeil_mit_x(x) = {
  cetz.canvas({
  import cetz.draw: *
  
  // Das Grid (Hintergrund)
  //grid((0, -1), (4, 2), step: 0.5, stroke: gray + 0.2pt) // Hauptlinien alle 0.5 Einheiten
  //grid((-1, -1), (3, 2), step: 0.1, stroke: gray.lighten(50%) + 0.1pt) // Sehr feine Linien alle 0.1

  line((0.5,1),(3,1), name: "top", mark: ( end: "stealth", fill: black) ) // Obere Gerade
  content((rel: (1em, 0), to: "top.end"), 
    box(fill: white, inset: 0pt)[#x], 
    anchor: "center")

})}


#let pfeilrueck_mit_x(x) = {
  cetz.canvas({
  import cetz.draw: *
  
  // Das Grid (Hintergrund)
  //grid((0, -1), (4, 2), step: 0.5, stroke: gray + 0.2pt) // Hauptlinien alle 0.5 Einheiten
  //grid((-1, -1), (3, 2), step: 0.1, stroke: gray.lighten(50%) + 0.1pt) // Sehr feine Linien alle 0.1

  line((0.5,1),(3,1), name: "top") // Obere Gerade
  
  arc((3,1), start:270deg, stop: 90deg, radius: -0.5)
  line((3,0),(1.5,0), mark: ( end: "stealth", fill: black))

  content("top.mid", 
    box(fill: white, inset: 2pt)[#x], 
    anchor: "center")

})}

#pfeilrueck_mit_x("y")

#let pfeilrueck_mit_xy(x, y) = {
  cetz.canvas({
  import cetz.draw: *
  
  // Das Grid (Hintergrund)
  //grid((0, -1), (4, 2), step: 0.5, stroke: gray + 0.2pt) // Hauptlinien alle 0.5 Einheiten
  //grid((-1, -1), (3, 2), step: 0.1, stroke: gray.lighten(50%) + 0.1pt) // Sehr feine Linien alle 0.1

  line((0.5,1),(3,1), name: "top") // Obere Gerade
  
  arc((3,1), start:270deg, stop: 90deg, radius: -0.5)
  line((3,0),(1.5,0), mark: ( end: "stealth", fill: black),name: "bottom")

  content("top.mid", 
    box(fill: white, inset: 2pt)[#x], 
    anchor: "center")

  content((rel: (-.5em, 0), to: "bottom.end"), 
    box(fill: white, inset: 0pt)[#y], 
    anchor: "center")

}) }


#let nonumber(body) = {
  set heading(numbering: none)
  body
}




#show heading.where(level: 1): it => {
  set text(size: 16pt, font: "Lato", tracking: 0.0em)
  block(spacing: 1.3em)[
    #it
    #v(-0.5em)
    //#line(length: 100%, stroke: 0.5pt + gray)
  ]
}
//#show heading: set block(above: 2em, below: 1em)
//#show heading.where(level: 1): set block(spacing: 2em)

#set heading(numbering: "1.")

#let einruecken(abstand, inhalt) = pad(left: abstand, inhalt)

#let hrule = {box}(line(length: 100%, stroke: 3pt))


//#(line(length: 100%, stroke: 3pt))