pandoc/src/headers/ConTeXtHeader

\enableregime[utf]  % use UTF-8

\setupcolors[state=start]
\setupinteraction[state=start, color=middlered] % needed for hyperlinks

\setuppapersize[letter][letter]  % use letter paper
\setuplayout[width=middle, backspace=1.5in, cutspace=1.5in,
             height=middle, header=0.75in, footer=0.75in] % page layout
\setuppagenumbering[location={footer,center}]  % number pages
\setupbodyfont[12pt]  % 12pt font
\setupwhitespace[medium]  % inter-paragraph spacing

\setuphead[section][style=\tfc]
\setuphead[subsection][style=\tfb]
\setuphead[subsubsection][style=\bf]

% define title block commands
\unprotect
\def\doctitle#1{\gdef\@title{#1}}
\def\author#1{\gdef\@author{#1}}
\def\date#1{\gdef\@date{#1}}
\date{\currentdate}  % Default to today unless specified otherwise.
\def\maketitle{%
  \startalignment[center]
    \blank[2*big]
      {\tfd \@title}
    \blank[3*medium]
      {\tfa \@author}
    \blank[2*medium]
      {\tfa \@date}
    \blank[3*medium]
  \stopalignment}
\protect

% define descr (for definition lists)
\definedescription[descr][
  headstyle=bold,style=normal,align=left,location=hanging,
  width=broad,margin=1cm]

% define ltxitem (for bulleted lists)  
\defineitemgroup[ltxitem][levels=4]
\setupitemgroup[ltxitem][1][1]
\setupitemgroup[ltxitem][2][2]
\setupitemgroup[ltxitem][3][3]
\setupitemgroup[ltxitem][4][4,packed]

% define ltxenum (for enumerated lists)
\defineitemgroup[ltxenum][levels=4]
\setupitemgroup[ltxenum][1][n]
\setupitemgroup[ltxenum][2][a]
\setupitemgroup[ltxenum][3][r]
\setupitemgroup[ltxenum][4][A,packed]

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

% for block quotations
\definestartstop [blockquote]
                 [before={\startnarrower\switchtobodyfont[11pt]
                          \whitespace\setupindenting[no]},
                  after={\stopnarrower\whitespace}]