Custom Latex style

rawlikstyle.sty

\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{rawlikstyle}[A custom style for latex documents]

% always use the UTF-8 encoding
\RequirePackage[utf8]{inputenc}

% clickable links
\RequirePackage{hyperref}

% palatino font for text and maths
\RequirePackage{mathpazo}
\usepackage[light]{FiraSans}
%\RequirePackage{cabin}

% title
\RequirePackage{titling}
\pretitle{\sffamily \scshape \Huge \centering}
\posttitle{\bigbreak}
\predate{\medskip \sffamily \scshape \large \centering}
\postdate{\medbreak}

% affiliations
\RequirePackage[noblocks,auth-sc,affil-it]{authblk}

% the abstract
\RequirePackage{abstract}
\renewcommand{\abstracttextfont}{\sffamily\normalsize}
\renewcommand{\abstractname}{}    % clear the title
\renewcommand{\absnamepos}{empty} % originally center

% write dates in the day, month, year order
\RequirePackage[UKenglish]{isodate}

% style of the titles of the sections
\usepackage[sc,sf,bf]{titlesec}

% separate paragraphs with a space rather than indentation
\RequirePackage[parfill]{parskip}

% figures and graphics
\RequirePackage{graphicx}
\RequirePackage{subfig}
\RequirePackage[export]{adjustbox}
% decide on the exact placement of figures with [H]
\RequirePackage{float}
\RequirePackage[dvipsnames]{xcolor}

% Captions
\RequirePackage[font={small, sf},labelfont={sf,bf}]{caption}
\renewcommand\figurename{Fig.}

% bibliography
\RequirePackage[style=nature,backend=biber,url=false,isbn=false,date=year]{biblatex}
% small font in the bibliography
\renewcommand*{\bibfont}{\footnotesize}
% do not show the issue
\AtEveryBibitem{\clearfield{issue}}

% upright greek characters
\RequirePackage{upgreek}
\RequirePackage{textgreek}

% typeset units properly
\RequirePackage{siunitx}