Footnote marker in text should be superscript lining figure, but footnote marker in the footnote should be full size old style figure

Question

My general footnote layout is like this:

\documentclass{article}
\usepackage{lipsum}
\usepackage[hang]{footmisc} % the whole footnote text is indented
    \setlength{\footnotemargin}{.5em} % push the footnote text half an em away from the footnote mark
\begin{document}
\null\vfill % just for this example
Text\footnote{\lipsum[2]}
\end{document}

But this is not how most typographic manuals will tell you to style the footnote markers. Based on such manuals, I want to achieve the following:

1. The footnote marker in the text should be superscript lining figures (I'm not sure yet if I want them to be proportional or tabular -- I need to test and see).
2. The footnote marker in the footnote should be full size old style tabular figures followed by a period and a space before the footnote text.

Now, I could achieve 1. with this code:

\documentclass{article}
\usepackage{lipsum}
\usepackage[hang]{footmisc} % the whole footnote text is indented
    \setlength{\footnotemargin}{.5em} % push the footnote text half an em away from the footnote mark
\usepackage{fontspec}
    \setmainfont{EBGaramond}
    \newfontfamily{\myfootnotemarkfont}{EBGaramond}[Numbers = Lining]
\usepackage{realscripts}
    \renewcommand\footnotemarkfont{\myfootnotemarkfont} % Proportional lining numbers for footnote markers
\begin{document}
\null\vfill % just for this example
Text\footnote{\lipsum[2]}
\end{document}

But this won't bring me any closer to goal number 2.

I can change the footnote marker in the footnote with the code from this answer:

\documentclass{article}
\usepackage{lipsum}
\usepackage{fontspec}
    \setmainfont{EBGaramond}
    \newfontfamily{\myfootnotemarkfont}{EBGaramond}[Numbers = Lining]
\usepackage{realscripts}
    \renewcommand\footnotemarkfont{\myfootnotemarkfont} % Proportional lining numbers for footnote markers
\usepackage{scrextend}
    \deffootnote{1em}{0em}{\thefootnotemark.\enskip}
\begin{document}
\null\vfill % just for this example
Text\footnote{\lipsum[2]}
\end{document}

But this will just use the font from the body text, which has proportional rather than tabular old style figures, and I don't understand how to put the footnote marker at the margin other than specifying some arbitrary number like {1em} that more or less looks right.

If there only was a package that would let you modify all these various aspects of the footnote layout ...

Answer 1

KOMA-Script (in your case via scrextend) has just the tools for this. The only thing you need to do is defining suitable fonts:

\usepackage{fontspec}
\setmainfont{EBGaramond}
\newfontfamily\EBGaramondLF  {EBGaramond}[Numbers = {Lining}]
% \newfontfamily\EBGaramondTLF {EBGaramond}[Numbers = {Monospaced,Lining}]
% \newfontfamily\EBGaramondOsF {EBGaramond}
\newfontfamily\EBGaramondTOsF{EBGaramond}[Numbers = {Monospaced}]

The \deffootnote macro allows both for defining hanging footnotes and styling the marks in the footer:

\deffootnote[space for mark]{hanging indent}{paragraph indent}{%
   mark definition using \thefootnotemark
}

Setting space for mark and hanging indent to equal values will give hanging footnotes like in your picture. Using \makebox[space for mark][l]{...} will align it to the right, i.e., to the margin. In this case – since the \makeboxwill lead to a fixed width, we can also leave out the optional argument to\deffootnote`:

\usepackage{scrextend}
\newcommand*\footnotemarkspace{1.5em}
% footnotes in the footer:
\deffootnote{\footnotemarkspace}{1em}{%
  \makebox[\footnotemarkspace][l]{\EBGaramondTOsF\thefootnotemark.}%
}

For the marks in the text there's \deffootnotemark:

\deffootnotemark{mark definition in the text using \thefootnotemark}

where we now can use

% footnote marks in the text:
\deffootnotemark{\textsuperscript{\EBGaramondLF\thefootnotemark}}

EBGaramond has specially designed superior figures. If you want to use them in the text you can say

\newfontfamily\EBGaramondSu{EbGaramond}[VerticalPosition=Superior]

and change the definition into

\deffootnotemark{\EBGaramondSu\thefootnotemark}

Putting this all together:

\documentclass{article}
\usepackage{fontspec}
\setmainfont{EBGaramond}
\newfontfamily\EBGaramondLF  {EBGaramond}[Numbers = {Lining}]
% \newfontfamily\EBGaramondTLF {EBGaramond}[Numbers = {Monospaced,Lining}]
% \newfontfamily\EBGaramondOsF {EBGaramond}
\newfontfamily\EBGaramondTOsF{EBGaramond}[Numbers = {Monospaced}]

\usepackage{scrextend}
\newcommand*\footnotemarkspace{1.5em}
% footnotes in the footer:
\deffootnote{\footnotemarkspace}{1em}{%
  \makebox[\footnotemarkspace][l]{\EBGaramondTOsF\thefootnotemark.}%
}

% footnote marks in the text:
\deffootnotemark{\textsuperscript{\EBGaramondLF\thefootnotemark}}

\usepackage{lipsum}

\begin{document}
\null\vfill % just for this example
\lipsum[4]
123 Text\footnote{\lipsum[2]} Text\footnote{\lipsum[3-4]}
\end{document}