Forcing a single page or use a full-page background

Forcing content to fit on a single page

If you want to make a container that will always take an entire page, no more, no less, you can define it like so:

CSS

.page {
  /* Defining an A4 portrait page */
  height: 1120px;
  width: 793px;

  /* Will prevent any content like large images from messing */
  /* with printed content auto-scaling */
  overflow: hidden;

  /* Will allow any absolutely positionned content to be */
  /* placed relatilvely to the page by default */
  position: relative;
}

You can then use it in your HTML

HTML

<div class="page">
  Content for a single page
</div>

Using a full-page background

If you want to apply a background so it takes the entire page, use the technique above and set the background image on your page:

CSS

.page-with-bg {
  background-image: url('some-background-url-or-datauri');
  background-size: cover;
}

HTML

<div class="page page-with-bg">
  Content for a single page
</div>