body, html {
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: black;
}

#canvas {
  display: block;
}

#bear {
  position: absolute;
  left: 10px;
  bottom: 50px;
  width: 110px;
  z-index: 10;
  transition: filter 0.2s ease, transform 0.2s ease;
}

#bear:hover {
  width: 112px;
  transform: scale(1.2);
  cursor: pointer;
}

#rotateNotice .overlay {
  position: fixed;
  z-index: 9999;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.95);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  text-align: center;
  padding: 20px;
}