body {
	font-family: "SkipLegDay", Helvetica, Arial, sans-serif;
	font-size: 20px;
	font-weight: bold;
	background: linear-gradient(180deg, #3F618C, #223A59);
	background-size: 400% 400%;
	-webkit-animation: AnimationName 10s ease infinite;
	-moz-animation: AnimationName 10s ease infinite;
	animation: AnimationName 10s ease infinite;

	@-webkit-keyframes AnimationName {
		0% {
			background-position: 51% 0%
		}
		50% {
			background-position: 50% 100%
		}
		100% {
			background-position: 51% 0%
		}
	}
	@-moz-keyframes AnimationName {
		0% {
			background-position: 51% 0%
		}
		50% {
			background-position: 50% 100%
		}
		100% {
			background-position: 51% 0%
		}
	}
	@keyframes AnimationName {
		0% {
			background-position: 51% 0%
		}
		50% {
			background-position: 50% 100%
		}
		100% {
			background-position: 51% 0%
		}
	}
}
h1, small {
	width: 600px;
	text-align: center;
	margin: 0 auto;
	z-index: 10;
	font-weight: bold;
	color: #6C9BD9;
}
h1 {
	font-size: 50px;
	margin-top: 15px;
}
small {
	display: block;
	font-size: 18px;
	line-height: 20px;
}
ul {list-style: none; float: left; margin: 100px 0 50px 0; line-height: 28px;}
ul li.validate {color: green; font-weight: bold;  text-decoration : line-through;}
ul li.validate:before {content: '\2713 '; color: green; font-weight: bold;}
.canvas-container {float: left; margin: 100px 30px 30px 50px;}
#answer-container {display: none; clear: both; text-align: center;}
#answer-container input {  }
#playground {background: url(feuille-de-papier.jpg) top left no-repeat; display: block; width: 600px; height:600px; margin: 0 auto;}


/* from http://davidwalsh.name/demo/css-flip.php  */
.flip-container, .front, .back {
	width: 600;
	height: 600px;
}

/* flip speed goes here */
.flipper {
	transition: 3s;
	transform-style: preserve-3d;
	position: relative;
}


/* entire container, keeps perspective */
.flip-container {
	perspective: 1000;
	transform-style: preserve-3d;
}
/*  UPDATED! flip the pane when hovered */
.flip-container.flip .back {
	transform: rotateY(0deg);
}
.flip-container.flip .front {
    transform: rotateY(180deg);
}

/* hide back of pane during swap */
.front, .back {
	backface-visibility: hidden;
	transition: 3s;
	transform-style: preserve-3d;

	position: absolute;
	top: 0;
	left: 0;
}

/* front pane, placed above back */
.front {
	z-index: 2;
	/* for firefox 31 */
	transform: rotateY(0deg);
}

/* back, initially hidden pane */
.back {
	transform: rotateY(-180deg);
}

.button {
	border-top: 1px solid #96d1f8;
	background: #0f1926;
	background: -webkit-gradient(linear, left top, left bottom, from(#0f1926), to(#0f1926));
	background: -webkit-linear-gradient(top, #0f1926, #0f1926);
	background: -moz-linear-gradient(top, #0f1926, #0f1926);
	background: -ms-linear-gradient(top, #0f1926, #0f1926);
	background: -o-linear-gradient(top, #0f1926, #0f1926);
	padding: 11px 22px;
	-webkit-border-radius: 27px;
	-moz-border-radius: 27px;
	border-radius: 27px;
	-webkit-box-shadow: rgba(0,0,0,1) 0 1px 0;
	-moz-box-shadow: rgba(0,0,0,1) 0 1px 0;
	box-shadow: rgba(0,0,0,1) 0 1px 0;
	text-shadow: rgba(0,0,0,.4) 0 1px 0;
	color: white;
	font-size: 11px;
	font-family: Helvetica, Arial, Sans-Serif;
	text-decoration: none;
	vertical-align: middle;
}
.button:hover {
	border-top-color: #28597a;
	background: #28597a;
	color: #ccc;
}
.button:active {
	border-top-color: #0f1926;
	background: #0f1926;
}