#interact {
  position: absolute;
  left: 50%;
  top: 61%;
  transform: translateX(-50%);
  padding: 12px 17px;
  background: #0b202ae0;
  border: 1px solid #93bdb97a;
  border-radius: 5px;
  color: #c4ddd5;
  font-size: 11px;
  letter-spacing: .12em;
  opacity: 0;
  transition: opacity .18s;
}
#interact.visible { opacity: 1; }
#interact kbd {
  display: inline-block;
  padding: 4px 7px;
  margin-right: 8px;
  color: #e3d49b;
  border-color: #c8b16a70;
}