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;
}

/**
 * Drop shadow mixins from Nicolas Gallagher demo
 * 
 * @thanks Nicolas Gallagher @necolas, @simurai, @cameronmoll, @matthamm
 * 
 * @link http://nicolasgallagher.com/css-drop-shadows-without-images/demo/
 */
/**
 * Drop shadow curled
 *
 * @thanks Nicolas Gallagher @necolas
 * @link http://nicolasgallagher.com/css-drop-shadows-without-images/demo/
 */
/**
 * Drop shadow curved
 *
 * @thanks Nicolas Gallagher @necolas
 * @link http://nicolasgallagher.com/css-drop-shadows-without-images/demo/
 */
/**
 * Drop shadow flying
 *
 * @thanks Geoffrey Crofte @geoffrey_crofte
 * @link http://www.creativejuiz.fr/trytotry/css3-box-shadow-after-before/
 */
/**
 * Drop shadow w/ lifted corners
 *
 * @thanks Nicolas Gallagher @necolas
 * @link http://nicolasgallagher.com/css-drop-shadows-without-images/demo/
 */
/**
 * Drop shadow w/ perspective
 *
 * @thanks Nicolas Gallagher @necolas
 * @link http://nicolasgallagher.com/css-drop-shadows-without-images/demo/
 */
/**
 * Drop shadow raised
 *
 * @thanks Nicolas Gallagher @necolas
 * @link http://nicolasgallagher.com/css-drop-shadows-without-images/demo/
 */
/**
 * Drop shadow rules required for transform on drop shadow
 * 
 * /!\ This is required if you want to apply some transform on the element using drop shadow
 *
 * @thanks Nicolas Gallagher @necolas
 * @link http://nicolasgallagher.com/css-drop-shadows-without-images/demo/
 */
/**
 * Shadow along the top edge of the browser viewport
 * 
 * @link http://playground.genelocklin.com/depth/
 */
div {
  width: 18em;
  height: 10em;
  margin: 5em auto;
  background: #eeeeee;
  border: 1px solid #ccc;
}
div p {
  padding: 3em 0;
  text-align: center;
}
div:hover {
  -moz-transform: rotate(3deg);
  -webkit-transform: rotate(3deg);
  -o-transform: rotate(3deg);
  -ms-transform: rotate(3deg);
  transform: rotate(3deg);
}

/*
 * This is required is you want to apply some transform on the element using drop shadow
 */
.drop-shadow-curved-vt-1,
.drop-shadow-curved-vt-2,
.drop-shadow-curved-vt,
.drop-shadow-curved-hz-1,
.drop-shadow-curved-hz-2,
.drop-shadow-curved-hz {
  position: relative;
}
.drop-shadow-curved-vt-1 > :last-child::before,
.drop-shadow-curved-vt-2 > :last-child::before,
.drop-shadow-curved-vt > :last-child::before,
.drop-shadow-curved-hz-1 > :last-child::before,
.drop-shadow-curved-hz-2 > :last-child::before,
.drop-shadow-curved-hz > :last-child::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  background: #eeeeee;
}

.drop-shadow-curved-vt-1 {
  position: relative;
}
.drop-shadow-curved-vt-1:before {
  content: "";
  position: absolute;
  z-index: -1;
  top: 10px;
  bottom: 10px;
  left: 0;
  right: 50%;
  -moz-box-shadow: 0 0 15px rgba(0, 0, 0, 0.6);
  -webkit-box-shadow: 0 0 15px rgba(0, 0, 0, 0.6);
  -o-box-shadow: 0 0 15px rgba(0, 0, 0, 0.6);
  box-shadow: 0 0 15px rgba(0, 0, 0, 0.6);
  -moz-border-radius: 0.1;
  -webkit-border-radius: 0.1;
  -o-border-radius: 0.1;
  -ms-border-radius: 0.1;
  -khtml-border-radius: 0.1;
  border-radius: 0.1;
}

.drop-shadow-curved-vt-2 {
  position: relative;
}
.drop-shadow-curved-vt-2:before {
  content: "";
  position: absolute;
  z-index: -1;
  top: 10px;
  bottom: 10px;
  left: 50%;
  right: 0;
  -moz-box-shadow: 0 0 15px rgba(0, 0, 0, 0.6);
  -webkit-box-shadow: 0 0 15px rgba(0, 0, 0, 0.6);
  -o-box-shadow: 0 0 15px rgba(0, 0, 0, 0.6);
  box-shadow: 0 0 15px rgba(0, 0, 0, 0.6);
  -moz-border-radius: 0.1;
  -webkit-border-radius: 0.1;
  -o-border-radius: 0.1;
  -ms-border-radius: 0.1;
  -khtml-border-radius: 0.1;
  border-radius: 0.1;
}

.drop-shadow-curved-vt {
  position: relative;
}
.drop-shadow-curved-vt:before {
  content: "";
  position: absolute;
  z-index: -1;
  top: 10px;
  bottom: 10px;
  left: 0;
  right: 0;
  -moz-box-shadow: 0 0 15px rgba(0, 0, 0, 0.6);
  -webkit-box-shadow: 0 0 15px rgba(0, 0, 0, 0.6);
  -o-box-shadow: 0 0 15px rgba(0, 0, 0, 0.6);
  box-shadow: 0 0 15px rgba(0, 0, 0, 0.6);
  -moz-border-radius: 0.1;
  -webkit-border-radius: 0.1;
  -o-border-radius: 0.1;
  -ms-border-radius: 0.1;
  -khtml-border-radius: 0.1;
  border-radius: 0.1;
}

.drop-shadow-curved-hz-1 {
  position: relative;
}
.drop-shadow-curved-hz-1:before {
  content: "";
  position: absolute;
  z-index: -1;
  top: 0;
  bottom: 50%;
  left: 10px;
  right: 10px;
  -moz-box-shadow: 0 0 15px rgba(0, 0, 0, 0.6);
  -webkit-box-shadow: 0 0 15px rgba(0, 0, 0, 0.6);
  -o-box-shadow: 0 0 15px rgba(0, 0, 0, 0.6);
  box-shadow: 0 0 15px rgba(0, 0, 0, 0.6);
  -moz-border-radius: 10;
  -webkit-border-radius: 10;
  -o-border-radius: 10;
  -ms-border-radius: 10;
  -khtml-border-radius: 10;
  border-radius: 10;
}

.drop-shadow-curved-hz-2 {
  position: relative;
}
.drop-shadow-curved-hz-2:before {
  content: "";
  position: absolute;
  z-index: -1;
  top: 50%;
  bottom: 0;
  left: 10px;
  right: 10px;
  -moz-box-shadow: 0 0 15px rgba(0, 0, 0, 0.6);
  -webkit-box-shadow: 0 0 15px rgba(0, 0, 0, 0.6);
  -o-box-shadow: 0 0 15px rgba(0, 0, 0, 0.6);
  box-shadow: 0 0 15px rgba(0, 0, 0, 0.6);
  -moz-border-radius: 10;
  -webkit-border-radius: 10;
  -o-border-radius: 10;
  -ms-border-radius: 10;
  -khtml-border-radius: 10;
  border-radius: 10;
}

.drop-shadow-curved-hz {
  position: relative;
}
.drop-shadow-curved-hz:before {
  content: "";
  position: absolute;
  z-index: -1;
  top: 0;
  bottom: 0;
  left: 10px;
  right: 10px;
  -moz-box-shadow: 0 0 15px rgba(0, 0, 0, 0.6);
  -webkit-box-shadow: 0 0 15px rgba(0, 0, 0, 0.6);
  -o-box-shadow: 0 0 15px rgba(0, 0, 0, 0.6);
  box-shadow: 0 0 15px rgba(0, 0, 0, 0.6);
  -moz-border-radius: 10;
  -webkit-border-radius: 10;
  -o-border-radius: 10;
  -ms-border-radius: 10;
  -khtml-border-radius: 10;
  border-radius: 10;
}