\usepackage{fontspec}
\usepackage[pagestyles]{titlesec}
\usepackage{graphicx}

\usepackage{datetime}
\usepackage[iso,english]{isodate} 

% page geometry
\usepackage{geometry}
\geometry{
 a4paper,
 total={210mm,297mm},
 left=30mm,
 right=30mm,
 top=20mm,
 bottom=20mm,
 }

% http://tex.stackexchange.com/questions/246174/dynamic-title-size-using-titlesec
\newcommand{\resizetitle}[1]{\resizebox{\sectionwidth}{!}{#1}}
\newlength{\sectionwidth}
\AtBeginDocument{%
  \setlength{\sectionwidth}{0.7\textwidth}%
}

% unix shell date
%\immediate\write18{date >\jobname.date}

% no page numbers
\pagenumbering{gobble}

\setmainfont{Quattrocento Sans}
%\newfontfamily\sectionfont{Share-ItalicOSF}
%\newfontfamily\sectionfont{Josefin Slab}
%\newfontfamily\sectionfont{Roboto Light}
\newfontfamily\sectionfont{Encode Sans ExtraLight}

%\pagestyle{fancy}
%\fancyhf{}
%\rhead{\sectionfont\small$title-meta$\selectfont}
%\lhead{Quattrocento Sans / Encode Sans ExtraLight}
%\rfoot{\sectionfont\small{printed: \isodate{\today} \currenttime \selectfont}}

% convert header to titleps - http://www.tex-tipografia.com/titleps_fancyhdr.html
\newpagestyle{main}[\small]{
  \setheadrule{.55pt}%
  \sethead[\colorbox{black}{\color{white}{\thepage}}]%  even-left
  [\chaptertitle]%                              even-center
  [\colorbox{CornflowerBlue}{\thesection}]%     even-right
  {\colorbox{CornflowerBlue}{\thesection}}%     odd-left
  {\sectiontitle}%                              odd-center
  {\colorbox{black}{\color{white}{\thepage}}}%  odd-right
  \setfoot{}{}{\sectionfont\small{printed: \isodate{\today} \currenttime \selectfont}}
}
  
\pagestyle{main}




%\titleformat*{\subsection}{\sectionfont\fontsize{32}{20}\selectfont}
\titleformat*{\subsubsection}{\sectionfont\fontsize{32}{12}\selectfont}

\titleformat{\subsection}
 {\sectionfont\Large\bfseries}
 {\thesection}
 {1em}
 {\resizetitle}

% url & hyperlink formatting
%\DeclareUrlCommand\url{}

% urls as footnotes
\renewcommand{\href}[2]{#2\footnote{\url{#1}}}