.row {
  position: relative;
}

/*
 * Anchored inside the message's top-right corner rather than floating above
 * it: the message list (`.list`) is `overflow-y: auto`, so a tooltip spilling
 * outside the row box would be clipped or trigger a scrollbar. Staying within
 * the row keeps it visible at the scroll edges. `pointer-events: none` lets
 * clicks and inner hover interactions (tool expand, links) pass through.
 */
.tip {
  position: absolute;
  top: 2px;
  right: 4px;
  z-index: 5;
  color: var(--text-dimmed);
  font-size: 11px;
  line-height: 1.4;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.12s ease;
}

.row:hover > .tip {
  opacity: 1;
}