\documentclass[12pt]{mwbk}
\usepackage[latin2]{inputenc}
\usepackage{polski}
\usepackage[margin=20mm,includeheadfoot]{geometry}
\usepackage{fancyhdr}
\fancyhead{}
\fancyfoot{}
\pagestyle{fancy}
\fancyfoot[LE, RO]{\thepage}
\renewcommand{\headrulewidth}{0pt}
\newenvironment{konkurs}[1]
  {\newpage\phantomsection\section*{#1}}
  {}
\newcommand{\pozycja}[2]{\vspace{1ex}\par\noindent\hangindent\parindent\textbf{#1: }#2}
\newcommand{\mail}[1]{\href{mailto:#1}{#1}}
\usepackage{varwidth}
\usepackage{color}
\definecolor{szary}{gray}{0.5}
\usepackage[bookmarks={true},bookmarksopen={true},bookmarksopenlevel={0},unicode={true}]{hyperref}
\hypersetup{
      pdfauthor={Anna Poskrobko, Ewa Girejko, Marzena Filipowicz-Chomko},pdftitle={Konkursy matematyczne w Polsce},
      pdfsubject={Opracowanie},
      pdfkeywords={konkursy matematyczne, konkurs, matematyka},
      pdfcreator={LaTeX z pakietem hyperref},
      citebordercolor={1 1 1},pdfborder={0 0 0},pagebackref={true},
      linkbordercolor={1 1 1},pdfview={FitH},pdfstartview={FitH}}
%\newcommand{\pozWKategorii}[2]{\par\noindent\hangindent2em\makebox[0em][l]{\textbf{#1}} #2}
\newcommand{\pozWKategorii}[2]{\begin{description}\item[{\makebox[0.9em][l]{#1}}]#2\end{description}}
\newcommand{\podpozWKategorii}[1]{\item #1}

\begin{document}

%% strona tytulowa

\null\vfill
\begin{center}
\begin{varwidth}{\textwidth}
\fontsize{30}{33}\selectfont\bfseries
Konkursy matematyczne\\w Polsce
\end{varwidth}
\end{center}
\vfill\vfill\vfill\vfill\null

\input konkursy-wstep.tex

\phantomsection
\chapter*{Opisy konkursów}

\input konkursy-tresc.tex

\phantomsection
\chapter*{Kategorie}

\input konkursy-kategorie.tex

\newpage
\phantomsection
\pdfbookmark[0]{Spis treści}{Spis treści}
\tableofcontents

\end{document}

