#avatar3d {
  position: absolute;
  left: 50%;
  top: auto;
  /* bottom will be set dynamically via JS */
  width: 30vw;
  height: 30vw;
  max-width: 400px;
  max-height: 400px;
  min-width: 200px;
  min-height: 200px;
  transform: translateX(-50%);
  z-index: 2;
  pointer-events: none;
  background: transparent;
  opacity: 0;
  transition: opacity 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}