A Pandoc lua filter that applies Pandoc fenced Div styling (https://pandoc.org/MANUAL.html#divs-and-spans) to Word and Latex/PDF output, as well as HTML.

shortcodes.lua

function Div (elem)
  if FORMAT:match 'docx' then
    if elem.classes[1] == "notes" then
      elem.attributes['custom-style'] = 'Notes'
      return elem
    else
      return elem
    end
  elseif FORMAT:match 'latex' then
    if elem.classes[1] == "notes" then
      return {
        pandoc.RawBlock('latex', '\\begin{tcolorbox}[beforeafter skip=1cm, ignore nobreak=true, breakable, colframe=Apricot!20!white, colback=Apricot!8!white, boxsep=2mm, arc=0mm, boxrule=0.5mm]'),
        elem,
        pandoc.RawBlock('latex', '\\end{tcolorbox}')
      }
    else
      return elem
    end
  end
end