Getting rid of the passage background

I'm using Twine 2 with SugarCube 1.0.34. I can place a background image to each of my passages, however every time i add some text it places the image inside of that too. I've used the 'inspect' to find the bit i need to alter (<section id="passage-space" class="passage space" data-passage="Space" style="visibility: visible;") but i just cannot seem to get rid of it when i write my css code for it. Any help from you peeps out there would be a great help. Thanks