preamble.tex

\usepackage{booktabs}
\usepackage{amsthm}
\makeatletter
\def\thm@space@setup{%
  \thm@preskip=8pt plus 2pt minus 4pt
  \thm@postskip=\thm@preskip
}
\makeatother

\makeatletter
\newenvironment{kframe}{%
\medskip{}
\setlength{\fboxsep}{.8em}
 \def\at@end@of@kframe{}%
 \ifinner\ifhmode%
  \def\at@end@of@kframe{\end{minipage}}%
  \begin{minipage}{\columnwidth}%
 \fi\fi%
 \def\FrameCommand##1{\hskip\@totalleftmargin \hskip-\fboxsep
 \colorbox{shadecolor}{##1}\hskip-\fboxsep
     % There is no \\@totalrightmargin, so:
     \hskip-\linewidth \hskip-\@totalleftmargin \hskip\columnwidth}%
 \MakeFramed {\advance\hsize-\width
   \@totalleftmargin\z@ \linewidth\hsize
   \@setminipage}}%
 {\par\unskip\endMakeFramed%
 \at@end@of@kframe}
\makeatother

\makeatletter
\@ifundefined{Shaded}{
}{\renewenvironment{Shaded}{\begin{kframe}}{\end{kframe}}}
\makeatother

\newenvironment{rmdblock}[1]
  {
  \begin{itemize}
  \renewcommand{\labelitemi}{
    \raisebox{-.7\height}[0pt][0pt]{
      {\setkeys{Gin}{width=3em,keepaspectratio}\includegraphics{images/#1}}
    }
  }
  \setlength{\fboxsep}{1em}
  \begin{kframe}
  \item
  }
  {
  \end{kframe}
  \end{itemize}
  }
\newenvironment{tuto}
  {\begin{rmdblock}{block-tuto}}
  {\end{rmdblock}}
\newenvironment{assign}
  {\begin{rmdblock}{block-assign}}
  {\end{rmdblock}}
\newenvironment{assign2}
  {\begin{rmdblock}{block-assign2}}
  {\end{rmdblock}}
\newenvironment{challenge}
  {\begin{rmdblock}{block-challenge}}
  {\end{rmdblock}}
\newenvironment{challenge2}
  {\begin{rmdblock}{block-challenge2}}
  {\end{rmdblock}}
\newenvironment{error}
  {\begin{rmdblock}{block-error}}
  {\end{rmdblock}}
\newenvironment{info}
  {\begin{rmdblock}{block-info}}
  {\end{rmdblock}}
\newenvironment{linux}
  {\begin{rmdblock}{block-linux}}
  {\end{rmdblock}}
\newenvironment{mac}
  {\begin{rmdblock}{block-mac}}
  {\end{rmdblock}}
\newenvironment{note}
  {\begin{rmdblock}{block-note}}
  {\end{rmdblock}}
\newenvironment{warning}
  {\begin{rmdblock}{block-warning}}
  {\end{rmdblock}}
\newenvironment{win}
  {\begin{rmdblock}{block-win}}
  {\end{rmdblock}}

\usepackage{geometry} % use to modify the margins
\geometry{hmargin = 4cm, vmargin = 3cm}