title: Draw perfectly centered grid or a cross (for a <div>)?
body: <p>Sometimes I want to align elements within a div to be centered either horizontally or vertically (without actually writing the code to center them) and obviously the designers have grids in their apps that help them to do that.</p>
  
  <p>Is it possible to create something like that in a css to draw a grid or maybe a simple cross for a specific div, so that it's then much easier to move around elements within that div (because those lines would be a guide to me of how centered that element is)?</p>
  
  <p>Thanks!!!</p>