Document Classes ⇒ making enumitem levels indent to level then continue on page left margin

[radiodurans]

Basically, I'm just tring to get a numbered section in memoir class to return to the page's leftmargin after the first line of indentation like below:

Screenshot_2023-05-27_17-29-52 (1).png (109.14 KiB) Viewed 10369 times

I hadn't gotten any responses in a couple weeks so I thought I'd try again. I thought listpaindent would do it but no. Here is some sample code that doesn't seem to work:

Code: Select all

\documentclass[12pt,oneside,letterpaper]{memoir}
\usepackage{newtxtext}
\usepackage{newtxmath}
\usepackage[USenglish]{babel}
\usepackage{enumitem}

\setlist[enumerate,1]{label=\arabic*., after=\vspace{\baselineskip}, itemindent=0in, listparindent=\leftmargin}leftmargin=\dimexpr0.25in+\labelwidth+\labelsep\relax, listparindent=\dimexpr0.25in\relax]
\setlist[enumerate,2]{label=\alph*., after=\vspace{0pt}, itemindent=.25in, listparindent=\leftmargin}
\setlist[enumerate,3]{label=(\arabic*), after=\vspace{0pt}, itemindent=0.5in, listparindent=\leftmargin}

\setlrmarginsandblock{0.5in}{1in}{*} % Left and right margins
\setulmarginsandblock{0.88in}{1in}{*} % Top and bottom margins
\raggedright

\checkandfixthelayout

\begin{document}

\begin{enumerate}
    \item First level item that is indented on the first line. This is a long description that spills over into multiple lines. Here is the second line of the description. And here is the third line of the description.
    \begin{enumerate}
        \item Second level item that is indented on the first line. This is a long description that spills over into multiple lines. Here is the second line of the description. And here is the third line of the description.
        \begin{enumerate}
            \item Third level item that is indented on the first line. This is a long description that spills over into multiple lines. Here is the second line of the description. And here is the third line of the description.
        \end{enumerate}
    \end{enumerate}
\end{enumerate}

\end{document}