.qtvr-viewer {
  width: 640px;
  height: 496px;
  position: relative;
  overflow: hidden;
  background: #000;
  cursor: grab;
  user-select: none;
}

.qtvr-viewer:active {
  cursor: grabbing;
}

.qtvr-viewer canvas {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  display: block;
}

.qtvr-help {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 6px 10px;
  color: #fff;
  background: rgba(0, 0, 0, .42);
  font: 12px Arial, Helvetica, sans-serif;
  text-align: center;
  pointer-events: none;
}