.footnote-tooltip {
  position: absolute;
  z-index: 9999;
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 4px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  padding: 0.6em 0.9em;
  max-width: 320px;
  font-size: 0.85em;
  line-height: 1.5;
  color: #333;
  pointer-events: none;
}