html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  margin: 0;
  padding: 0;
  user-select: none;
  color: #111;
  font-family: serif;
}

body {
  background-color: #f0f0f0;
  cursor: pointer;
  background-size: cover;
  background-position: center center;
  background-image: url(https://images.unsplash.com/photo-1495195129352-aeb325a55b65?ixlib=rb-0.3.5&q=80&fm=jpg&crop=entropy&cs=tinysrgb&w=800&fit=max&ixid=eyJhcHBfaWQiOjE0NTg5fQ&s=b019c08e464380701b3625f9e5cc98d1);
}

#app {
  width: 100%;
  height: 100%;
}

#stage {
  backface-visibility: visible;
}

#download-button {
  position: absolute;
  bottom: 0;
  left: 0;
  padding: 10px;
  display: inline-block;
  margin: 10px;
  background-color: #f0f0f0;
  color: #303030;
  border-radius: 4px;
  cursor: pointer;
  border-bottom: solid 3px #f0f0f0;
}
#download-button:hover {
  border-bottom: solid 3px #d7d7d7;
}