.bt-node {
  position: absolute;
  min-width: 200px;
  background: #252526;
  border-radius: 4px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  overflow: visible;
  user-select: none;
  transition: all 0.2s;
}

.bt-node.selected {
  box-shadow: 0 0 0 2px #007acc, 0 4px 16px rgba(0, 122, 204, 0.4);
}

.bt-node.running {
  box-shadow: 0 0 0 3px #ffa726, 0 4px 16px rgba(255, 167, 38, 0.6);
  animation: gentle-glow 2s ease-in-out infinite;
}

.bt-node.success {
  box-shadow: 0 0 0 3px #4caf50, 0 4px 16px rgba(76, 175, 80, 0.6);
}

.bt-node.failure {
  box-shadow: 0 0 0 3px #f44336, 0 4px 16px rgba(244, 67, 54, 0.6);
}

.bt-node.executed {
  box-shadow: 0 0 0 2px rgba(76, 175, 80, 0.3), 0 2px 8px rgba(0, 0, 0, 0.3);
}

.bt-node.root {
  box-shadow: 0 4px 12px rgba(255, 215, 0, 0.3);
}

.bt-node-header {
  position: relative;
  padding: 10px 14px;
  background: linear-gradient(135deg, #4a148c 0%, #7b1fa2 100%);
  color: #ffffff;
  font-weight: 500;
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 8px;
  border-radius: 4px 4px 0 0;
}

.bt-node-header.composite {
  background: linear-gradient(135deg, #1565c0 0%, #1976d2 100%);
}

.bt-node-header.action {
  background: linear-gradient(135deg, #2e7d32 0%, #388e3c 100%);
}

.bt-node-header.condition {
  background: linear-gradient(135deg, #c62828 0%, #d32f2f 100%);
}

.bt-node-header.decorator {
  background: linear-gradient(135deg, #f57c00 0%, #fb8c00 100%);
}

.bt-node-header.root {
  background: linear-gradient(135deg, #f9a825 0%, #fdd835 100%);
  color: #333333;
}

.bt-node-header.blackboard {
  background: linear-gradient(135deg, #6a1b9a 0%, #8e24aa 100%);
}

.bt-node-header-icon {
  flex-shrink: 0;
}

.bt-node-header-title {
  flex: 1;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.bt-node-body {
  padding: 12px;
  background: #1e1e1e;
}

.bt-node-category {
  font-size: 10px;
  color: #858585;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

.bt-node-properties {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.bt-node-property {
  position: relative;
  padding-left: 20px;
  font-size: 11px;
  color: #cccccc;
  display: flex;
  align-items: center;
  min-height: 20px;
}

.bt-node-property-label {
  color: #969696;
  margin-right: 6px;
}

.bt-node-property-value {
  color: #cccccc;
  background: #2d2d30;
  padding: 2px 6px;
  border-radius: 2px;
  font-size: 10px;
}

.bt-node-port {
  position: absolute;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid #1e1e1e;
  cursor: pointer;
  z-index: 10;
  transition: all 0.15s ease;
  transform-origin: center center;
}

.bt-node-port-input {
  background: #0e639c;
  top: -7px;
  left: 50%;
  transform: translateX(-50%);
}

.bt-node-port-input:hover {
  transform: translateX(-50%) scale(1.2);
}

.bt-node-port-output {
  background: #0e639c;
  bottom: -7px;
  left: 50%;
  transform: translateX(-50%);
}

.bt-node-port-output:hover {
  transform: translateX(-50%) scale(1.2);
}

.bt-node-port-property {
  background: #666;
  width: 12px;
  height: 12px;
  left: -6px;
  top: 50%;
  transform: translateY(-50%);
}

.bt-node-port-property:hover {
  transform: translateY(-50%) scale(1.2);
}

.bt-node-port-property.connected {
  background: #4caf50;
}

.bt-node-port-variable-output {
  background: #9c27b0;
  width: 12px;
  height: 12px;
  right: -6px;
  top: 50%;
  transform: translateY(-50%);
}

.bt-node-port-variable-output:hover {
  transform: translateY(-50%) scale(1.2);
}

.bt-node-blackboard-value {
  font-size: 11px;
  color: #cccccc;
  margin-top: 6px;
  padding: 6px 8px;
  background: #2d2d30;
  border-radius: 3px;
  border-left: 3px solid #9c27b0;
  font-family: 'Consolas', 'Monaco', monospace;
}

@keyframes pulse {
  0%, 100% {
    transform: translate(-50%, -50%) scale(1);
  }
  50% {
    transform: translate(-50%, -50%) scale(1.02);
  }
}

@keyframes gentle-glow {
  0%, 100% {
    box-shadow: 0 0 0 3px #ffa726, 0 4px 16px rgba(255, 167, 38, 0.6);
  }
  50% {
    box-shadow: 0 0 0 3px #ffa726, 0 6px 20px rgba(255, 167, 38, 0.8);
  }
}

.bt-node-empty-warning-tooltip {
  display: none;
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  margin-bottom: 8px;
  padding: 6px 10px;
  background: rgba(0, 0, 0, 0.9);
  color: #fff;
  font-size: 11px;
  white-space: nowrap;
  border-radius: 4px;
  pointer-events: none;
  z-index: 1000;
}

.bt-node-empty-warning-tooltip::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 4px solid transparent;
  border-top-color: rgba(0, 0, 0, 0.9);
}

.bt-node-empty-warning-container:hover .bt-node-empty-warning-tooltip {
  display: block;
}

/* 未生效节点样式 */
.bt-node.uncommitted {
  border: 2px dashed #ff5722;
  box-shadow: 0 0 0 2px rgba(255, 87, 34, 0.3), 0 4px 16px rgba(255, 87, 34, 0.4);
  opacity: 0.85;
}

.bt-node.uncommitted.selected {
  box-shadow: 0 0 0 2px #ff5722, 0 4px 16px rgba(255, 87, 34, 0.6);
}

/* 节点ID样式 */
.bt-node-id {
  margin-top: 4px;
  font-size: 9px;
  font-weight: 500;
  font-family: 'Consolas', 'Monaco', monospace;
  background: rgba(0, 0, 0, 0.3);
  color: rgba(255, 255, 255, 0.9);
  padding: 2px 6px;
  border-radius: 3px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  display: inline-block;
  letter-spacing: 0.5px;
}

/* 未生效节点警告 */
.bt-node-uncommitted-tooltip {
  display: none;
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  margin-bottom: 8px;
  padding: 6px 10px;
  background: rgba(255, 87, 34, 0.95);
  color: #fff;
  font-size: 11px;
  white-space: nowrap;
  border-radius: 4px;
  pointer-events: none;
  z-index: 1000;
}

.bt-node-uncommitted-tooltip::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 4px solid transparent;
  border-top-color: rgba(255, 87, 34, 0.95);
}

.bt-node-uncommitted-warning:hover .bt-node-uncommitted-tooltip {
  display: block;
}