[Tex/LaTex] Indentation of new list levels with enumitem

Question

I am using enumitem package in order to extend latex default 4 itemize-list levels. So far, everything works, but I realized, that a proper indentation of new list levels is missing. Here an example:

\documentclass{scrartcl}

\usepackage{textcomp}
\usepackage{mathabx}

\usepackage{enumitem}
\setlistdepth{8}
\setlist[itemize,1]{label=\textbullet}
\setlist[itemize,2]{label=\textopenbullet}
\setlist[itemize,3]{label=$\blacktriangleright$}
\setlist[itemize,4]{label=$\smalltriangleright$}
\setlist[itemize,5]{label=$\sqbullet$}
\setlist[itemize,6]{label=$\square$=}
\setlist[itemize,7]{label=$\blackdiamond$}
\setlist[itemize,8]{label=$\diamond$}
\renewlist{itemize}{itemize}{8}

\begin{document}

\begin{itemize}
\item Level 1
  \begin{itemize}
  \item Level 2
    \begin{itemize}
    \item Level 3 
      \begin{itemize}
      \item Level 4
        \begin{itemize}
        \item Level 5
          \begin{itemize}
          \item Level 6
            \begin{itemize}
            \item Level 7
              \begin{itemize}
              \item Level 8
              \end{itemize}
            \end{itemize}
          \end{itemize}
        \end{itemize}
      \end{itemize}
    \end{itemize}
  \end{itemize}
\end{itemize}

\end{document}

This code provides following output:

As one can see, the item "bullets" on the first 4 levels are each indented in relation to the upper level text. But for the last 4 which are defined by my own, "bullets" are horizontally on the same line as upper layer text.

Now, I cannot figure out, how to adjust the list so that every list level has the same indentation.

Answer 1

What about this?

\documentclass{scrartcl}

\usepackage{textcomp}
\usepackage{mathabx}

\usepackage{enumitem}
\setlistdepth{8}
\setlist{leftmargin = *}
\setlist[itemize,1]{label=\textbullet}
\setlist[itemize,2]{label=\textopenbullet}
\setlist[itemize,3]{label=$\blacktriangleright$}
\setlist[itemize,4]{label=$\smalltriangleright$}
\setlist[itemize,5]{label=$\sqbullet$,leftmargin = 1cm}
\setlist[itemize,6]{label=$\square$=,leftmargin = 1cm}
\setlist[itemize,7]{label=$\blackdiamond$,leftmargin = 1cm}
\setlist[itemize,8]{label=$\diamond$,leftmargin = 1cm}
\renewlist{itemize}{itemize}{8}

\begin{document}

\begin{itemize}
\item Level 1
  \begin{itemize}
  \item Level 2
    \begin{itemize}
    \item Level 3
      \begin{itemize}
      \item Level 4
        \begin{itemize}
        \item Level 5 Lalala Lalala Lalala Lalala Lalala Lalala Lalala Lalala Lalala Lalala Lalala Lalala 
            \begin{itemize}
            \item Level 6
            \begin{itemize}
            \item Level 7
              \begin{itemize}
              \item Level 8
              \end{itemize}
            \end{itemize}
          \end{itemize}
        \end{itemize}
      \end{itemize}
    \end{itemize}
  \end{itemize}
\end{itemize}

\end{document}