.tool {
  fill: rgba(255, 255, 255, 0.55);   /* was black */
  stroke: #2563eb;
  stroke-width: 4;
  cursor: pointer;
  transition: fill 0.2s ease;
}

.tool:hover {
  fill: rgba(37, 99, 235, 0.25);
}

.tool.restricted {
  stroke: #f59e0b;
  stroke-dasharray: 8 4;
}