html {
  background: url(/images/arduino_rasp.jpg) no-repeat center fixed;
  -webkit-background-size: cover; /* pour anciens Chrome et Safari */
  background-size: cover; /* version standardisée */
}

body {
	background:transparent;
}

.panel{
	background-color : rgba(255, 255, 255, 0.9);
}

.wait{
	cursor: wait!important;
}

.sidebar{
	position: -webkit-sticky;
	position: sticky;
	top: 20%;
	width: 200px;
}

.sidebar-collapsed{
	position: -webkit-sticky;
	position: sticky;
	top: 20%;
	width: 45px;
}

.collapsed{
	display: none;
}