* {
  margin: 0;
  padding: 0;
}

body {
  background-image: repeating-conic-gradient(#808080 0% 25%, #909090 0% 50%);
  background-position: 8px 8px;
  background-size: 32px 32px;
  background-color: #fff;
}

#game {
  display: block;
  position: fixed;
  width: 100%;
  height: 100%;
}

.dg li.folder .dg.selected > ul > li.title {
  background-color: #042;
}