title: Vertically centering a title page
body: <p>I'm trying to vertically center a title on a custom-sized page with latex. I've written the following code, but for some reason it doesn't center. Could someone please point me to what's wrong with it?</p>
  
  <p>Thanks! </p>
  
  <pre><code>\documentclass{article}
  \setlength{\pdfpagewidth}{88.184mm}
  \setlength{\pdfpageheight}{113.854mm}
  
  \usepackage[margin=0.5cm, paperwidth=88.184mm, paperheight=113.854mm]{geometry}
  
  \title{[[title]]}
  \date{[[date]]}
  \author{[[author]]}
  
  \begin{document}
      \vspace{\fill}
      \maketitle
      \vspace{\fill}
  
      \newpage
  
      [[text]]
  \end{document}
  </code></pre>