.ngsb-float{
  position: fixed !important;

  /* ⬇️ POSISI UTAMA */
  right: 16px !important;

  /*
    64px  = tinggi footer chapter (±)
    16px  = jarak aman
    env() = aman untuk HP notch
  */
  bottom: calc(64px + 16px + env(safe-area-inset-bottom)) !important;

  left: auto !important;
  top: auto !important;
  inset: auto !important;
  transform: none !important;

  width: 52px;
  height: 52px;
  border-radius: 50%;

  background: rgba(30,30,30,.9);
  backdrop-filter: blur(8px);

  display: flex;
  align-items: center;
  justify-content: center;

  z-index: 9999;
  box-shadow: 0 8px 22px rgba(0,0,0,.45);
  cursor: pointer;
}

.ngsb-float svg{
  width: 22px;
  height: 22px;
  fill: none;
  stroke: #fff;
  stroke-width: 2;
}

.ngsb-float:active{
  transform: scale(.95) !important;
}