% ac-paper-essay.sty — Aesthetic Computer essay layout
% Usage: \usepackage{ac-paper-essay} in each essay-* paper
%
% Paul Graham-influenced essay format. Minimal chrome. The essay is the
% argument; the design exists only to let the argument breathe.
%
% Design grammar:
%   - Single column, narrow measure (~5.0in body width)
%   - Serif body with extra leading
%   - Title at top (plain, large, dark), date below, no kicker/deck/byline
%   - Section breaks: a centered hairline rule of underscores
%   - Optional Title Case subheads in bold acdark
%   - Discursive bottom-of-page footnotes for source attribution and asides
%   - Author colophon at the end ("Thanks to X for reading drafts")
%
% Tradition: Paul Graham's paulgraham.com essay form. Tight, argumentative,
% observational; thesis-driven; no academic apparatus visible in the body.

\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{ac-paper-essay}[2026/05/25 Aesthetic Computer essay layout]

\RequirePackage{tikz}
\usetikzlibrary{shadows}

% === FONTS ===
\newfontfamily\acbold{ywft-processing-bold}[
  Path=../../system/public/type/webfonts/,
  Extension=.ttf
]
\newfontfamily\aclight{ywft-processing-light}[
  Path=../../system/public/type/webfonts/,
  Extension=.ttf
]

% === COLORS ===
\definecolor{acpink}{RGB}{180,72,135}
\definecolor{acpurple}{RGB}{120,80,180}
\definecolor{acdark}{RGB}{40,36,48}
\definecolor{acgray}{RGB}{119,119,119}

% === DISCURSIVE NOTES (bottom-of-page footnotes) ===
\renewcommand{\thefootnote}{\arabic{footnote}}
\renewcommand{\@makefnmark}{\textsuperscript{\color{acpink}\bfseries\@thefnmark}}
\renewcommand{\footnoterule}{%
  \kern-3pt
  {\color{acgray}\hrule width 0.30\columnwidth height 0.4pt}
  \kern 2pt
}
\renewcommand{\@makefntext}[1]{%
  \parindent 1em\noindent
  \hb@xt@1.4em{\hss\textsuperscript{\color{acpink}\bfseries\@thefnmark}}#1%
}
\newcommand{\enote}[1]{\footnote{#1}}
\newcommand{\printendnotes}{}

% === SECTION FORMATTING (Title Case subheads, sparing use) ===
% Sections in plain bold serif, dark, no numbers. Sized to feel like a
% pulled-up subhead, not an academic chapter mark.
\titleformat{\section}[block]
  {\normalfont\bfseries\fontsize{13pt}{16pt}\selectfont\color{acdark}\raggedright}
  {}{0pt}{}
\titlespacing{\section}{0pt}{1.8em}{0.5em}

\titleformat{\subsection}[block]
  {\normalfont\itshape\bfseries\normalsize\color{acdark}\raggedright}
  {}{0pt}{}
\titlespacing{\subsection}{0pt}{1em}{0.2em}

\setcounter{secnumdepth}{-1}

% === SECTION BREAK ===
% A centered hairline of em-dashes, in Paul Graham's tradition (his are
% underscores; ours are em-dashes in acgray). Wholly visual; no TikZ.
\newcommand{\acbreak}{%
  \par\vspace{1.4em}%
  \begin{center}%
    {\color{acgray}\rule{2.5em}{0.4pt}}%
  \end{center}%
  \vspace{1em}\par\noindent\ignorespaces%
}

% === TITLE BLOCK (plain, PG-style) ===
% \essaytitle{}  Large dark title, top-anchored
% \essaydate{}   Small italic date below
\newcommand{\essaytitle}[1]{%
  \begin{center}%
    \begin{tikzpicture}
      % Drop shadow: dim acdark copy, offset down-right
      \node[acdark, opacity=0.25,
            font=\aclight\fontsize{42pt}{46pt}\selectfont,
            inner sep=0pt] at (2.5pt, -2.5pt) {#1};
      % Main: pink text at origin (drawn on top)
      \node[acpink,
            font=\aclight\fontsize{42pt}{46pt}\selectfont,
            inner sep=0pt] at (0, 0) {#1};
    \end{tikzpicture}%
  \end{center}%
  \vspace{0.6em}%
}
\newcommand{\essaydate}[1]{%
  \begin{center}%
    {\fontsize{14pt}{16pt}\selectfont\itshape\color{acgray}#1}%
  \end{center}%
  \vspace{2em}%
}

% === COLOPHON (thanks-for-reading, PG-style) ===
% Left-aligned, like Paul Graham's "Thanks to X, Y, Z for reading drafts of this."
\newcommand{\colophon}[1]{%
  \par\vspace{2em}%
  \noindent{\color{acgray}\rule{3em}{0.4pt}}\par
  \vspace{0.6em}%
  \noindent{\small\itshape\color{acgray}#1}\par
}

% === LIST SETTINGS (essays rarely use lists; default to tight) ===
\setlist[itemize]{leftmargin=1.4em, itemsep=0.2em, topsep=0.3em, parsep=0pt}
\setlist[enumerate]{leftmargin=1.4em, itemsep=0.2em, topsep=0.3em, parsep=0pt}

% === PARAGRAPH SETTINGS ===
\setlength{\parindent}{1.2em}
\setlength{\parskip}{0pt}
\linespread{1.18}

\tolerance=400
\emergencystretch=2em
\hyphenpenalty=200

\endinput