/* White background */
body { margin: 0; overflow: hidden; background: #ffffff; }
/* UI panel in the top-left; using smaller font and compact controls */

#playButton {
  position: fixed;
  width: 100%;
  height: 100%;
  font-family: sans-serif;
  font-size: 100px; 
  color: #ff00ff; 
  text-align: center; 
  vertical-align: middle;
  margin-top:40%;
  cursor: pointer;
}

#ui-controls {
  position: absolute;
  top: 10px;
  left: 10px;
  background: rgba(255,255,255,0.95);
  padding: 8px;
  border: 1px solid #ccc;
  font-family: sans-serif;
  font-size: 12px;
  z-index: 100;
}
#ui-controls label {
  display: block;
  margin: 3px 0;
}
#ui-controls input {
  width: 100%;
}
#ui-controls input[type="checkbox"] {
  width: auto;
  margin-right: 5px;
}