override.css

body {
  background-color: #ddd;
}

div.slides {
  background-color: #ddd;
}

div.slide {
  background: -webkit-gradient(linear, left bottom, left top, from(white), to(#eee));
  color: #f00;
}

section, header, header>h1 {
  font-family: sans-serif !important;;
  /* font-weight: normal !important; */
}

div.slide p {
  font-size: 40px;
  text-align: center;
}

pre {
  font-size: 20px;
}

li {
  font-size: 40px;
}

body.presenter_view div.slide {
  -webkit-transform: scale(.25, .25);
  -moz-transform: scale(.25, .25);
  -o-transform: scale(.25, .25);

  -webkit-transform-origin: 0 0;
  -moz-transform-origin: 0 0;
  -o-transform-origin: 0 0;

  top: 15px;
  margin-top: 0;
}

body.presenter_view div#current_presenter_notes {
  top: 15%;
  height: 100%;
  font-size: 18px;
}

body.presenter_view div#current_presenter_notes section {
  height: 100%;
}

body.presenter_view div#current_presenter_notes li {
  font-size: 18px;
  padding: 0;
}