/* Remove margins from the 'html' and 'body' tags, and ensure the page takes up full screen height */
html, body {height:100%; margin:0; padding:0; }
/* Set the position and dimensions of the background image. */
#page-background {position:fixed; top:0; left:0; width:100%; height:100%; }
/* Specify the position and layering for the content that needs to appear in front of the background image. Must have a higher z-index value than the background image. Also add some padding to compensate for removing the margin from the 'html' and 'body' tags. */
