$if(context-lang)$
\mainlanguage[$context-lang$]
$endif$
$if(context-dir)$
\setupalign[$context-dir$]
\setupdirections[bidi=on,method=two]
$endif$
% Enable hyperlinks
\setupinteraction
  [state=start,
$if(title)$
  title={$title$},
$endif$
$if(subtitle)$
  subtitle={$subtitle$},
$endif$
$if(author)$
  author={$for(author)$$author$$sep$; $endfor$},
$endif$
$if(keywords)$
  keyword={$for(keywords)$$keywords$$sep$; $endfor$},
$endif$
  style=$linkstyle$,
  color=$linkcolor$,
  contrastcolor=$linkcontrastcolor$]
% make chapter, section bookmarks visible when opening document
\placebookmarks[chapter, section, subsection, subsubsection, subsubsubsection, subsubsubsubsection][chapter, section]
\setupinteractionscreen[option=bookmark]
\setuptagging[state=start]

$if(papersize)$
\setuppapersize[$for(papersize)$$papersize$$sep$,$endfor$]
$endif$
$if(layout)$
\setuplayout[$for(layout)$$layout$$sep$,$endfor$]
$endif$
$if(pagenumbering)$
\setuppagenumbering[$for(pagenumbering)$$pagenumbering$$sep$,$endfor$]
$endif$
% use microtypography
\definefontfeature[default][default][script=latn, protrusion=quality, expansion=quality, itlc=yes, textitalics=yes, onum=yes, pnum=yes]
\definefontfeature[smallcaps][script=latn, protrusion=quality, expansion=quality, smcp=yes, onum=yes, pnum=yes]
\setupalign[hz,hanging]
\setupitaliccorrection[global, always]
\setupbodyfontenvironment[default][em=italic] % use italic as em, not slanted
\usemodule[simplefonts$if(fontsize)$,$fontsize$$endif$]
\setmainfontfallback[DejaVu Serif][range={greekandcoptic, greekextended}, force=yes, rscale=auto]
$if(mainfont)$
\setmainfont[$mainfont$]
$endif$
$if(sansfont)$
\setsansfont[$sansfont$][rscale=auto]
$endif$
$if(monofont)$
\setmonofont[$monofont$][features=none, rscale=auto]
$endif$
$if(mathfont)$
\setmathfont[$mathfont$][rscale=auto]
$endif$
\setupwhitespace[$if(whitespace)$$whitespace$$else$medium$endif$]
$if(indenting)$
\setupindenting[$for(indenting)$$indenting$$sep$,$endfor$]
$endif$
$if(interlinespace)$
\setupinterlinespace[$for(interlinespace)$$interlinespace$$sep$,$endfor$]
$endif$

\setuphead[chapter]            [style=\tfd,header=empty]
\setuphead[section]            [style=\tfc]
\setuphead[subsection]         [style=\tfb]
\setuphead[subsubsection]      [style=\bf]
\setuphead[subsubsubsection]   [style=\sc]
\setuphead[subsubsubsubsection][style=\it]

$if(headertext)$
\setupheadertexts$for(headertext)$[$headertext$]$endfor$
$endif$
$if(footertext)$
\setupfootertexts$for(footertext)$[$footertext$]$endfor$
$endif$
$if(number-sections)$
$else$
\setuphead[chapter, section, subsection, subsubsection, subsubsubsection, subsubsubsubsection][number=no]
$endif$

\definedescription
  [description]
  [headstyle=bold, style=normal, location=hanging, width=broad, margin=1cm, alternative=hanging]

\setupitemize[autointro]    % prevent orphan list intro
\setupitemize[indentnext=no]

\setupfloat[figure][default={here,nonumber}]
\setupfloat[table][default={here,nonumber}]

\setupthinrules[width=15em] % width of horizontal rules

\setuphead[title][
  style={\tfd\raggedcenter},
  before={\startalignment[middle]},
  after={
$if(subtitle)$
    \smallskip
    {\tfa $subtitle$}
$endif$
$if(author)$
    \smallskip
    {\tfa $for(author)$$author$$sep$\crlf $endfor$}
$endif$
$if(date)$
    \smallskip
    {\tfa $date$}
$endif$
    \bigskip\stopalignment}]

$for(header-includes)$
$header-includes$
$endfor$

\starttext
$if(title)$
\title{$title$}
$endif$
$if(abstract)$
\midaligned{\it Abstract}
\startnarrower[2*middle]
$abstract$
\stopnarrower
\blank[big]
$endif$
$for(include-before)$
$include-before$
$endfor$
$if(toc)$
\completecontent
$endif$
$if(lot)$
\completelistoftables
$endif$
$if(lof)$
\completelistoffigures
$endif$

$body$

$for(include-after)$
$include-after$
$endfor$
\stoptext