body > div, ul#sidebar.unactive {
  display: none;
}

body > div.on {
  display: block;
}

#dialog {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background: rgba(0, 0, 0, 0.1);
}

#dialog > div {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background: #fff;
  padding: 0 1em;
  border: 1px solid #aaa;
  border-radius: 0.5em;
}

#dialog p.answers {
  text-align: center;
}

#dialog button {
  display: inline-block;
}

#error {
  position: absolute;
  z-index: 1;
  top: 1em;
  right: 1em;
  max-width: 20em;
  border: 1px solid #e0afac;
  padding: 1em;
  border-radius: 0.5em;
  background: bisque;
  cursor: pointer;
  margin: 0;
  display: none;
}

#error.on {
  display: block;
}

ul#sidebar {
	position: fixed;
	top: 0;
	right: 0;
	margin: 0;
	padding: 0;
	list-style: none;
}

ul#sidebar > li {
	cursor: pointer;
	float: left;
	padding: 0.5em 1em;
}