.custom-node {
  background: white;
  border: 2px solid #ddd;
  border-radius: 8px;
  padding: 10px;
  min-width: 150px;
  max-width: 300px; /* 限制节点不要太长 */
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
}

.custom-node.selected {
  border-color: #1677ff;
  box-shadow: 0 4px 12px rgba(22, 119, 255, 0.3);
}

.custom-node .node-handle {
  opacity: 0;
  transition: opacity 0.3s ease;
}

.custom-node:hover .node-handle {
  opacity: 1;
}

.custom-node:hover .node-handle,
.node-handle.react-flow__handle-connecting {
  opacity: 1;
}

.node-header {
  display: flex;
  justify-content: center;
  margin-bottom: 4px;
}

.node-label {
  font-weight: 600;
  color: #333;
  font-size: 12px; /* smaller title font */
  flex: 0 0 120px; /* 固定宽度 100px，给按钮留更多空间 */
  min-width: 0; /* allow truncation inside flex */
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  text-align: center;
}

.node-info {
  font-size: 10px;
  border-bottom: 1px solid #eee;
  margin-bottom: 4px;
}

.info-item {
  margin-bottom: 4px;
}

.info-item .label {
  color: #999;
}

.info-item .value {
  color: #333;
}

.node-actions {
  display: flex;
  gap: 10px;
}

.gen-btn {
  background: #1677ff;
  color: #fff;
  border: none;
  border-radius: 4px;
  padding: 1px 6px; /* 更小的按钮内边距 */
  cursor: pointer;
  font-size: 8px; /* 更小的文字 */
  line-height: 1;
  height: 20px;
  flex-shrink: 0;
  flex: 1;
  opacity: 0.95;
  transition: transform 120ms ease, box-shadow 120ms ease, background-color 120ms ease, opacity 120ms ease;
  outline: none; /* remove default focus outline */
}

.gen-btn:hover {
  opacity: 1;
}

.gen-btn:focus {
  outline: none;
}

.gen-btn:active {
  transform: translateY(1px) scale(0.995);
  background-color: #0f62d6; /* slightly darker on press */
  box-shadow: inset 0 1px 2px rgba(0,0,0,0.12);
}