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;
}

/**
 * Shape/Polygon/Triangle
 *
 * @author Maxime Thirouin maxime.thirouin@gmail.com @MoOx
 */
.triangle-top {
  width: 0;
  height: 0;
  border-left: 1em solid transparent;
  border-right: 1em solid transparent;
  border-bottom: 1em solid black;
}

.triangle-bottom {
  width: 0;
  height: 0;
  border-left: 1em solid transparent;
  border-right: 1em solid transparent;
  border-top: 1em solid black;
}

.triangle-left {
  width: 0;
  height: 0;
  border-top: 1em solid transparent;
  border-right: 1em solid black;
  border-bottom: 1em solid transparent;
}

.triangle-right {
  width: 0;
  height: 0;
  border-top: 1em solid transparent;
  border-left: 1em solid black;
  border-bottom: 1em solid transparent;
}

.triangle-top-left {
  width: 0;
  height: 0;
  border-top: 1em solid black;
  border-bottom: 1em solid transparent;
  border-left: 1em solid black;
  border-right: 1em solid transparent;
}

.triangle-top-right {
  width: 0;
  height: 0;
  border-top: 1em solid black;
  border-bottom: 1em solid transparent;
  border-left: 1em solid transparent;
  border-right: 1em solid black;
}

.triangle-bottom-left {
  width: 0;
  height: 0;
  border-top: 1em solid transparent;
  border-bottom: 1em solid black;
  border-left: 1em solid black;
  border-right: 1em solid transparent;
}

.triangle-bottom-right {
  width: 0;
  height: 0;
  border-top: 1em solid transparent;
  border-left: 1em solid transparent;
  border-bottom: 1em solid black;
  border-right: 1em solid black;
}