.move-caption {
  position: absolute;
  left: 50%;
  bottom: 14px;
  transform: translateX(-50%);
  max-width: min(620px, calc(100vw - 28px));
  padding: 8px 12px;
  border-radius: 12px;
  border: 1px solid rgba(120,180,255,0.85);
  background: rgba(20,22,28,0.92);
  box-shadow: 0 14px 40px rgba(0,0,0,0.55), 0 2px 0 rgba(0,0,0,0.35);
  color: rgb(235,240,255);
  font-size: 13px;
  line-height: 1.35;
  text-align: center;
  pointer-events: none;
  opacity: 0;
  transition: opacity 120ms ease, transform 120ms ease;
  user-select: none;
  font-variant-ligatures: none;
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
  white-space: pre-wrap;
}

/* show state */
.move-caption.is-on {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.move-caption.is-off {
  opacity: 0;
  transform: translateX(-50%) translateY(2px);
}