html {
  padding: 1em;
  background: -webkit-gradient(linear, 50% 0%, 50% 100%, color-stop(0%, #dddddd), color-stop(100%, #ffffff)) no-repeat;
  background: -webkit-linear-gradient(#dddddd, #ffffff) no-repeat;
  background: -moz-linear-gradient(#dddddd, #ffffff) no-repeat;
  background: -o-linear-gradient(#dddddd, #ffffff) no-repeat;
  background: -ms-linear-gradient(#dddddd, #ffffff) no-repeat;
  background: linear-gradient(#dddddd, #ffffff) no-repeat;
}

h1 {
  font-size: 2em;
  margin-bottom: 1em;
}

h2 {
  font-size: 1.4em;
  margin-bottom: .6em;
}

.doc {
  background: #fff;
  border: #ddd;
  padding: 1em;
  color: #aaa;
  margin: 1em;
  font-style: italic;
}
.doc a {
  color: #999;
}

/**
 * Ui background overlay inspired by Google Chrome modal overlay
 * 
 * @author Maxime Thirouin @MoOx maxime.thirouin@gmail.com
 */
/**
 * Background overlay inspired by Google Chrome modal overlay
 * 
 * @author Maxime Thirouin @MoOx maxime.thirouin@gmail.com
 */
.ui-overlay {
  position: fixed;
  top: 0;
  bottom: 0;
  right: 0;
  left: 0;
  z-index: 10;
  background-image: -webkit-gradient(radial, 50% 50%, 0, 50% 50%, 100, color-stop(0%, rgba(127, 127, 127, 0.5)), color-stop(35%, rgba(127, 127, 127, 0.5)), color-stop(100%, rgba(0, 0, 0, 0.7)));
  background-image: -webkit-radial-gradient(rgba(127, 127, 127, 0.5), rgba(127, 127, 127, 0.5) 35%, rgba(0, 0, 0, 0.7));
  background-image: -moz-radial-gradient(rgba(127, 127, 127, 0.5), rgba(127, 127, 127, 0.5) 35%, rgba(0, 0, 0, 0.7));
  background-image: -o-radial-gradient(rgba(127, 127, 127, 0.5), rgba(127, 127, 127, 0.5) 35%, rgba(0, 0, 0, 0.7));
  background-image: -ms-radial-gradient(rgba(127, 127, 127, 0.5), rgba(127, 127, 127, 0.5) 35%, rgba(0, 0, 0, 0.7));
  background-image: radial-gradient(rgba(127, 127, 127, 0.5), rgba(127, 127, 127, 0.5) 35%, rgba(0, 0, 0, 0.7));
  pointer-events: none;
}