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 convex effect from one color
 *
 * @todo merge with ui-button ?
 *
 * @author Maxime Thirouin maxime.thirouin@gmail.com @MoOx
 */
.ui-convex,
.ui-convex-hover {
  width: 10em;
  height: 2em;
  margin: 1em auto;
}

.ui-convex {
  background: #dddddd;
  background: -webkit-gradient(linear, 50% 0%, 50% 100%, color-stop(0%, #eeeeee), color-stop(100%, #dddddd));
  background: -webkit-linear-gradient(#eeeeee, #dddddd);
  background: -moz-linear-gradient(#eeeeee, #dddddd);
  background: -o-linear-gradient(#eeeeee, #dddddd);
  background: -ms-linear-gradient(#eeeeee, #dddddd);
  background: linear-gradient(#eeeeee, #dddddd);
}

.ui-convex-hover {
  background: #dddddd;
  background: -webkit-gradient(linear, 50% 0%, 50% 100%, color-stop(0%, #eeeeee), color-stop(100%, #dddddd));
  background: -webkit-linear-gradient(#eeeeee, #dddddd);
  background: -moz-linear-gradient(#eeeeee, #dddddd);
  background: -o-linear-gradient(#eeeeee, #dddddd);
  background: -ms-linear-gradient(#eeeeee, #dddddd);
  background: linear-gradient(#eeeeee, #dddddd);
}
.ui-convex-hover:hover, .ui-convex-hover:focus {
  background: -webkit-gradient(linear, 50% 0%, 50% 100%, color-stop(0%, #dddddd), color-stop(100%, #eeeeee));
  background: -webkit-linear-gradient(#dddddd, #eeeeee);
  background: -moz-linear-gradient(#dddddd, #eeeeee);
  background: -o-linear-gradient(#dddddd, #eeeeee);
  background: -ms-linear-gradient(#dddddd, #eeeeee);
  background: linear-gradient(#dddddd, #eeeeee);
}