Reveal.js with backgound image and company logo, all in css theme

I wanted to use reveal.js for my presentations. In our company, we have (as usual) a standard template for presentations. The problem was that the background had two parts: A small triangle in top left corner, and company logo in bottom right corner.

CSS3 supports having multiple backgrounds, so after a little tinkering I came up with following css snippets.

body {
  background-image: url('theme_images/corner.svg'), url('theme_images/sysart.svg');
  background-repeat: no-repeat;
  background-position: top left, bottom right;
  background-size: auto 30%, 20% 20%;
  }

The frontpage was some what different.

html.title body {
  background:url("theme_images/front.svg"), url('theme_images/sysart.svg');
  background-repeat: no-repeat;
  background-position: top left, bottom right;
  background-size: 100% auto, 20% 20%;
}

The whole css can be seen in https://github.com/sysart/reveal.js/blob/sysart-theme/sysart.css#L10