in-header.tex

\usepackage{hyphenat} % auto hyphenation
\usepackage{graphicx} % colors 
\usepackage{wallpaper} % for the background image on title page
\usepackage{geometry} % for margins
\usepackage{xcolor,colortbl} % table colors
\usepackage{subcaption} % for multiple graphics

\usepackage{ragged2e} % text alignment

\usepackage[most]{tcolorbox} % boxes behind cover page text
\usepackage{setspace} % line spacing
\usepackage{parskip} % paragraph spacing

\usepackage{fvextra} % code hyphenation / styling
\usepackage{fontspec} % mono font
\usepackage[T1]{fontenc}
\usepackage{inconsolata}

\usepackage[all]{nowidow} % prevent single lines of text at the beginning or end of a page
\usepackage{soul} % For underlining

\setmonofont{inconsolata} % font for code bits

\setmainfont{MyriadPro}[
    Path=./fonts/,
    Extension = .ttf,
    UprightFont=*-SemiCn,
    BoldFont=*-BoldSemiCn,
    ItalicFont=*-SemiCnIt,
    BoldItalicFont=*-BoldSemiCnIt
]

%\onehalfspacing % line spacing
\setstretch{1}% Set line spacing 


\setlength{\parskip}{0.25em}
\setlength{\parindent}{0pt}

\definecolor{cosmoblue}{RGB}{39,128,227} 
\definecolor{thkoelnred}{RGB}{201,12,15}
\definecolor{thkoelnorange}{RGB}{234,91,12}
\definecolor{thkoelnviolet}{RGB}{184,37,133}
\definecolor{cosmoblack}{RGB}{55,58,60} 

\usepackage{titlesec} % title and section spacing
% \titlespacing*{<command>}{<left>}{<before-sep>}{<after-sep>}
\titlespacing*{\section}{0pt}{1em}{0.1em}
\titlespacing*{\subsection}{0pt}{1em}{0.1em}


\arrayrulecolor{thkoelnviolet} % table color