summary-preamble.sty

\usepackage{xstring}
\tcbuselibrary{breakable}

% Colors
\definecolor{KeywordColor}{HTML}{308741}
\definecolor{SubKeywordColor}{HTML}{144f20}
\definecolor{TopicColor}{HTML}{4c4c4c}
\definecolor{IntuitionColor}{HTML}{0f424c}
\definecolor{TopicBorderColor}{HTML}{1e8499}
\newcommand{\keyword}[1]{\textcolor{KeywordColor}{#1}}
\newcommand{\subkeyword}[1]{\textcolor{SubKeywordColor}{#1}}
\newcommand{\intuition}[1]{\textcolor{IntuitionColor}{#1}}

% Arrow
\DeclareFontFamily{U}{mathb}{}
\DeclareFontShape{U}{mathb}{m}{n}{
     <-5.5> mathb5
  <5.5-6.5> mathb6
  <6.5-7.5> mathb7
  <7.5-8.5> mathb8
  <8.5-9.5> mathb9
  <9.5-11>  mathb10
  <11->     mathb12
}{}
\DeclareSymbolFont{mathb}{U}{mathb}{m}{n}
\DeclareMathSymbol{\relatedtopicarrow}{3}{mathb}{"EB}

% Topics
\NewDocumentCommand{\topic}{m +g +g}{
    % Args:
    % Topic name
    % Keyword name (If #3 exists, else Content)
    % Content
    \textcolor{TopicColor}{\uline{#1}}:
    \IfNoValueTF{#3}{\relax}{(\color{SubKeywordColor}\textbf{#2}\color{black})}
    \begin{tcolorbox}[
        breakable,
        boxrule=0pt,
        colback=black!2,
        left=1mm,
        frame hidden,
        sharp corners,
        enhanced,
        borderline west={2pt}{0pt}{TopicBorderColor}]
        \IfNoValueTF{#3}{#2}{#3}
    \end{tcolorbox}
}

\NewDocumentCommand{\topiccomment}{s m +m}{
    % Args:
    % *: Make it colored as intuition and omit linebreak
    % Comment name
    % Content
    \begin{itemize}[leftmargin=*]
        \item[$\relatedtopicarrow$] \color{\IfBooleanTF{#1}{IntuitionColor}{TopicColor}}\uline{#2}:
        \IfBooleanTF{#1}{\relax}{\color{black}\\}#3
        \IfBooleanTF{#1}{\color{black}}{\relax}
    \end{itemize}
}

\newcommand{\proof}[1]{\topiccomment{Proof}{#1}}