\documentclass[10pt]{article}
\usepackage[left=1.5in,
            right=1.5in,
            top=1in,
            bottom=1.5in,]{geometry}
\usepackage{authblk}
\usepackage{setspace}
\usepackage{hyperref}
\usepackage{lmodern}  % For better font weights
\usepackage{sectsty}  % For section formatting
\usepackage{graphicx}

\newlength{\cslhangindent}
\setlength{\cslhangindent}{1.5em}
\newenvironment{cslreferences}%
  {\setlength{\parindent}{0pt}%
  \everypar{\setlength{\hangindent}{\cslhangindent}}\ignorespaces}%
  {\par}

% Handle conditionals
$if(colorlinks)$
\PassOptionsToPackage{usenames,dvipsnames}{color}
$endif$

% Handle fonts
$if(fontfamily)$
\usepackage[$for(fontfamilyoptions)$$fontfamilyoptions$$sep$,$endfor$]{$fontfamily$}
$endif$

% Make sections bolder and adjust spacing
\sectionfont{\large\bfseries}
\allsectionsfont{\bfseries}

% Adjust line spacing
\setstretch{1.1}  % Tighter line spacing

\begin{document}

% Thick line above title
\noindent\rule{\textwidth}{5pt}

% Title with tighter spacing and bolder font
\begin{center}
{\fontsize{17}{19}\selectfont\bfseries $title$\par}
\end{center}

% Thin line below title
\noindent\rule{\textwidth}{1pt}

% Authors with tighter spacing
$for(author)$
\begin{center}
{\large\bfseries $author.name$\par}
{\normalsize $author.affiliation$\par}
{\normalsize\ttfamily $author.email$}
\vspace{0.7em}
\end{center}
$endfor$

\vspace{0.5em}
{\begin{center}\large\bfseries Abstract\end{center}}

\begin{quotation}
{\selectfont $abstract$}
\end{quotation}

$body$

\end{document}