Wie erstelle ich einen guten Style im Paket listings?

\documentclass[a5paper]{scrartcl}
\usepackage[T1]{fontenc}
\usepackage{selinput}
\SelectInputMappings{
  adieresis  = {ä} ,
  germandbls = {ß}
}
\usepackage[ngerman]{babel}

\usepackage{listings,xcolor}

\makeatletter
% \lst@Key{title}\relax{\def\lst@title{#1}}
\lst@Key{caption}\relax{%
  \lstKV@OptArg[{#1}]{#1}{\def\lst@caption{##2}\def\lst@@caption{##1}}%
}
\lst@AddToHookAtTop{Init}{%
  \ifx\lst@title\@empty
  \else
    \def\lst@captionpos{b}% nur für den Fall
    \textbf{\lst@maketitle\lst@title}%
    \let\lst@title\@empty % damit die caption trotzdem geschrieben wird
  \fi
}
\makeatother

\lstdefinestyle{latex}{
  language        = [AlLaTeX]TeX ,
  basicstyle      = \footnotesize\ttfamily ,
  keywordstyle    = \color{purple!40!black} ,
  commentstyle    = \itshape\color{green!40!black} ,
  stringstyle     = \color{orange} ,
  moretexcs       = {
    tableofcontents ,
    SelectInputMappings ,
    blindmathpaper ,
    blindmathtrue ,
    blinddocument
  } ,
  deletekeywords = {document}
}
\lstset{
  style           = latex ,
  numberstyle     = \tiny\color{gray!90!black}\noncopynumber ,
  numbers         = left , 
  numbersep       = 5pt ,
  frame           = single ,
  backgroundcolor = \color{yellow!30} ,
  rulecolor       = \color{lightgray!40} ,
  breaklines      = true ,
  columns         = fullflexible ,
  literate        = {ä}{{\"a}}1{ö}{{\"o}}1 {ü}{{\"u}}1{ß}{{\ss}}1 ,
  captionpos      = b
}

\renewcommand{\lstlistlistingname}{Codeverzeichnis}
\renewcommand{\lstlistingname}{Quellcode}

\usepackage{accsupp}
\newcommand{\noncopynumber}[1]{%
  \BeginAccSupp{method=escape,ActualText={}}
    #1%
  \EndAccSupp{}%
}

% Beschriftungen einstellen:
\setkomafont{caption}{\raggedright}
\setkomafont{captionlabel}{\bfseries}

% das AmS-Logo:
\usepackage{hologo}
\newcommand*\AmS{\hologo{AmS}}

\begin{document}

\lstlistoflistings

\begin{lstlisting}[
  title   = {\AmS-Dokumentenklassen} ,
  caption = {Minimalbeispiel für die \AmS-Dokumentenklassen} ,
  label=ams]
\documentclass{amsart} %amsart amsproc amsbook
\usepackage{selinput}
\SelectInputMappings{
  adieresis  = {ä} ,
  germandbls = {ß}
}
\usepackage[ngerman]{babel}

\usepackage{blindtext}% für Blindtext

\begin{document}
\tableofcontents

\blindmathpaper

\blindmathtrue
\blinddocument\blinddocument

\end{document}
\end{lstlisting}

\end{document}