/* Collapsible subtask toggle button */
.subtask-toggle {
  display: inline-block;
  vertical-align: middle;
  transition: color 0.15s, transform 0.15s;
}

.subtask-toggle.expanded {
  color: #22aa22;
}

.subtask-toggle.collapsed {
  color: #dd3333;
  /* Highlight: pulsing background to attract attention */
  animation: subtask-pulse 1.5s ease-in-out infinite;
  border-radius: 50%;
  padding: 1px 2px;
  background-color: rgba(221, 51, 51, 0.12);
}

.subtask-toggle:hover {
  transform: scale(1.2);
}

@keyframes subtask-pulse {
  0%, 100% { background-color: rgba(221, 51, 51, 0.12); }
  50% { background-color: rgba(221, 51, 51, 0.28); }
}