body {
  background-color: black;
  color: rgb(200, 0, 0);
  font-family: Tahoma;
  text-align: center;
}


/* volume control */
#volumeControl {
  position: fixed;
  bottom: 12px;
  left: 12px;
  background: rgba(0, 0, 0, 0.6);
  padding: 8px 10px;
  border-radius: 8px;
  font-size: 12px;
  color: rgb(200, 0, 0);
  display: flex;
  align-items: center;
  gap: 6px;
  z-index: 9999;
}

#volumeSlider {
  -webkit-appearance: none; /* chrome, safari, edge */
  -moz-appearance: none; /* make warning go away */
  appearance: none;

  width: 80px;
  height: 6px;

  background: black;
  border: 1px solid rgb(200, 0, 0);

  cursor: pointer;
  outline: none;
}

#volumeSlider::-webkit-slider-thumb {
  -webkit-appearance: none;
  -moz-appearance: none; /* make warning go away */
  appearance: none;

  width: 10px;
  height: 10px;

  background: black;
  border: 1px solid rgb(200, 0, 0);

  cursor: pointer;
}

/* firefox thumb */
#volumeSlider::-moz-range-thumb {
  width: 10px;
  height: 10px;

  background: black;
  border: 1px solid rgb(200, 0, 0);

  cursor: pointer;
}

/* firefox track */
#volumeSlider::-moz-range-track {
  background: black;
  border: 1px solid rgb(200, 0, 0);
  height: 6px;
}

.atabook-iframe {
  width: 100%;
  height: 70vh;       /* full screen height */
  border: none;
  display: block;     /* removes tiny gaps below iframe */
}