\documentclass[a4paper, fontsize = 8pt, landscape]{scrartcl}
\usepackage[german]{babel}
\usepackage[landscape, margin=0.5cm]{geometry}
\usepackage[dvipsnames]{xcolor}
% Hyperref links, pdf metadata
\usepackage{hyperref}
\usepackage{amscd, amsmath, amssymb, blindtext, empheq, enumitem, multicol}
\usepackage{mathtools}
\usepackage{graphicx}
\usepackage{tikz}
\usepackage{array} %for bigger tabular spacings
\usepackage{multirow} % for multirow cells in tabular
\usepackage{booktabs}
\usepackage{comment}
%% Formal tables
\usepackage{booktabs}

% make document compact

\parindent 0pt
\pagestyle{empty}
\setlength{\unitlength}{1cm}
\setlist{leftmargin = *}

% define some colors
\definecolor{title}{RGB}{229,140,140}
\definecolor{subtitle}{RGB}{239,185,185}
\definecolor{text}{RGB}{0,0,0}
\definecolor{formulabox}{RGB}{182,225,189}

% section color box
\setkomafont{section}{\mysection}
\newcommand{\mysection}[1]{%
    \Large\normalfont \sffamily \bfseries%
    \setlength{\fboxsep}{0cm}%already boxed
    \colorbox{title}{%
        \begin{minipage}{\linewidth}%
            \vspace*{2pt}%Space before
            \leftskip2pt %Space left
            \rightskip\leftskip %Space right
            {\color{text} #1}
            \vspace*{1pt}%Space after
        \end{minipage}%
    }}
%subsection color box
\setkomafont{subsection}{\mysubsection}
\newcommand{\mysubsection}[1]{%
    \normalsize \normalfont \sffamily \bfseries%
    \setlength{\fboxsep}{0cm}%already boxed
    \colorbox{subtitle}{%
        \begin{minipage}{\linewidth}%
            \vspace*{2pt}%Space before
            \leftskip2pt %Space left
            \rightskip\leftskip %Space right
            {\color{text} #1}
            \vspace*{1pt}%Space after
        \end{minipage}%
    }}
    
    
% equation box        
\newcommand{\eqbox}[1]{\fcolorbox{black}{white}{\hspace{0.5em}#1\hspace{0.5em}}}
% equation box        
\newcommand{\eqboxf}[1]{\fcolorbox{black}{formulabox}{\hspace{0.5em}#1\hspace{0.5em}}}

%Laplace Operator
\newcommand{\LAPB}[1]{\text{\textbf{L}}\left\{ #1 \right\}}
\newcommand{\LAPZ}[1]{\text{\textbf{L}}^{-1}\left\{ #1 \right\}}


% tabular collum types
\newcolumntype{C}[1]{>{\centering\arraybackslash}m{#1}}

%macro for vectors 
\newcommand{\vect}[1]{\mathbf{\underline{#1}}}
\renewcommand{\d}[1]{\text{ d}#1}


\newcolumntype{L}[1]{>{\raggedright\let\newline\\\arraybackslash\hspace{0pt}}m{#1}}
\newcolumntype{C}[1]{>{\centering\let\newline\\\arraybackslash\hspace{0pt}}m{#1}}
\newcolumntype{R}[1]{>{\raggedleft\let\newline\\\arraybackslash\hspace{0pt}}m{#1}}

 

\begin{document}

\setcounter{secnumdepth}{0} %no enumeration of sections
\begin{multicols*}{3}
	\begin{center}
		\Large{Technische Mechanik} \\
		\tiny{von Jirayu Ruh, \href{mailto:jirruh@ethz.ch}{jirruh@ethz.ch}}
	\end{center}

	\input{sections/Kinematik.tex}
	\pagebreak
	\input{sections/Statik.tex}
	\pagebreak
	\input{sections/Dynamik.tex}
	\pagebreak
\end{multicols*}
\end{document}