% hypertensor.sty -- shared preamble for the HyperTensor arXiv papers.
% Targets a recent TeX Live (2022+) and arXiv-acceptable packages only.
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{hypertensor}[2026/04/27 HyperTensor shared preamble]

% ---- Geometry & typography -------------------------------------------------
\RequirePackage[a4paper,margin=1.05in]{geometry}
\RequirePackage{microtype}
\RequirePackage[T1]{fontenc}
\RequirePackage{lmodern}
\RequirePackage{textcomp}
\RequirePackage{newtxtext}            % Times-like text; arXiv-friendly
\linespread{1.18}
\RequirePackage{setspace}
\RequirePackage{placeins}             % \FloatBarrier to keep floats in section

% ---- Math ------------------------------------------------------------------
% Load amsmath/amssymb/amsthm BEFORE newtxmath to avoid \Bbbk / \openbox
% redefinition errors that occur with amsfonts+newtxmath ordering.
\RequirePackage{amsmath,amssymb,mathtools}
\let\openbox\relax
\RequirePackage{amsthm}
\let\Bbbk\relax
\RequirePackage{newtxmath}            % math companion to newtxtext
\RequirePackage{bm}

\theoremstyle{plain}
\newtheorem{theorem}{Theorem}[section]
\newtheorem{proposition}[theorem]{Proposition}
\newtheorem{lemma}[theorem]{Lemma}
\newtheorem{corollary}[theorem]{Corollary}
\theoremstyle{definition}
\newtheorem{definition}[theorem]{Definition}
\newtheorem{assumption}[theorem]{Assumption}
\theoremstyle{remark}
\newtheorem{remark}[theorem]{Remark}

% Convenient operators / shortcuts.
\DeclareMathOperator{\rank}{rank}
\DeclareMathOperator{\trace}{tr}
\DeclareMathOperator{\diag}{diag}
\DeclareMathOperator*{\argmin}{arg\,min}
\DeclareMathOperator*{\argmax}{arg\,max}
\DeclareMathOperator{\softmax}{softmax}
\DeclareMathOperator{\Span}{span}
\newcommand{\R}{\mathbb{R}}
\newcommand{\E}{\mathbb{E}}
\newcommand{\Wmat}{W}
\newcommand{\Pmat}{P}
\newcommand{\Kmat}{K}
\newcommand{\Qmat}{Q}
\newcommand{\Vmat}{V}
\newcommand{\Xmat}{X}
\newcommand{\norm}[1]{\left\lVert #1 \right\rVert}
\newcommand{\inner}[2]{\langle #1, #2 \rangle}

% ---- Tables, figures, code -------------------------------------------------
\RequirePackage{booktabs}
\RequirePackage{array}
\RequirePackage{multirow}
\RequirePackage{tabularx}
\RequirePackage{makecell}
\RequirePackage{graphicx}
\RequirePackage{caption}
\captionsetup{font=small,labelfont=bf,format=plain,justification=justified,singlelinecheck=false}
\RequirePackage{subcaption}
\RequirePackage{xcolor}
\definecolor{HTred}{RGB}{192,57,43}
\definecolor{HTblue}{RGB}{45,107,228}
\definecolor{HTgreen}{RGB}{26,122,74}
\definecolor{HTgrey}{RGB}{92,92,92}
\definecolor{HTbgsoft}{RGB}{249,249,248}

\RequirePackage{listings}
\lstdefinestyle{ht}{
  basicstyle=\ttfamily\footnotesize,
  keywordstyle=\color{HTblue}\bfseries,
  commentstyle=\color{HTgreen}\itshape,
  stringstyle=\color{HTred},
  numbers=left, numberstyle=\tiny\color{HTgrey},
  numbersep=6pt, frame=single, framerule=0.4pt,
  backgroundcolor=\color{HTbgsoft},
  breaklines=true, breakatwhitespace=true,
  showstringspaces=false, columns=fullflexible,
  keepspaces=true, tabsize=2,
}
\lstset{style=ht}

\RequirePackage{siunitx}
\sisetup{detect-weight=true,detect-family=true}

% ---- Boxes / callouts (arXiv-safe; no shadows) -----------------------------
\RequirePackage[most]{tcolorbox}
\tcbset{
  htbase/.style={
    enhanced, breakable, boxrule=0.4pt,
    colback=HTbgsoft, colframe=HTgrey,
    arc=2pt, left=8pt, right=8pt, top=6pt, bottom=6pt,
    fonttitle=\bfseries\small,
  },
}
\newtcolorbox{htnote}[1][]{htbase, title={Note}, #1}
\newtcolorbox{htwarn}[1][]{htbase, colframe=HTred, title={Caution}, #1}
\newtcolorbox{htgood}[1][]{htbase, colframe=HTgreen, title={Result}, #1}

% ---- Bibliography ----------------------------------------------------------
\RequirePackage[
  backend=biber,
  style=numeric-comp,
  sorting=none,
  giveninits=true,
  url=true, doi=false, isbn=false,
  maxbibnames=8, minbibnames=3,
]{biblatex}

% ---- Hyperref last; cleveref after -----------------------------------------
\RequirePackage[hidelinks,breaklinks=true,colorlinks=true,
  linkcolor=black,citecolor=black,urlcolor=black]{hyperref}
\RequirePackage[capitalise,noabbrev]{cleveref}
\crefname{section}{\S}{\S\S}
\Crefname{section}{\S}{\S\S}

% ---- Title block helpers ---------------------------------------------------
% \hypertensorbanner is intentionally empty: the \maketitle block already
% prints author + affiliation + source, and the second banner was redundant.
\newcommand{\hypertensorbanner}{}

% ---- Misc ------------------------------------------------------------------
\RequirePackage{enumitem}
\setlist{itemsep=2pt,topsep=3pt}
\RequirePackage{etoolbox}
\AtBeginEnvironment{quote}{\small}

\endinput