/* File: client/public/canvasTooltip.css */
#canvas-tooltip {
  position: fixed;
  display: none;
  pointer-events: none;
  background: rgba(0, 0, 0, 0.8);
  color: #fff;
  padding: 8px 10px;
  border-radius: 4px;
  font-size: 14px;
  z-index: 9999;
  transition: opacity 0.3s ease;
}