in the screen.css file, change:
html, body, div, span, applet, object, iframe, h1, h2, h3, h4, h5, h6 {
margin: 0 auto;
padding: 0;
border: 0;
outline: 0;
font-size: 100%;
text-align: left;
background: #FFF;
}
to:
html, body, div, span, applet, object, iframe, h1, h2, h3, h4, h5, h6 {
margin: 0 auto;
padding: 0;
border: 0;
outline: 0;
font-size: 100%;
text-align: left;
/*background: #FFF;*/
}