/* 知识图谱样式 */

.knowledge-graph {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 24px;
}

.knowledge-graph-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.knowledge-graph-header h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
}

.knowledge-graph-count {
  font-size: 13px;
  color: var(--text-tertiary);
  padding: 4px 10px;
  background: var(--bg-muted);
  border-radius: 12px;
}

/* SVG画布 */
.knowledge-graph-canvas {
  background: var(--bg-muted);
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 16px;
}

.knowledge-graph-canvas svg {
  display: block;
}

/* 边 */
.knowledge-graph-edge {
  stroke: var(--border-color);
  opacity: 0.5;
  transition: opacity 0.2s;
}

.knowledge-graph-edge:hover {
  opacity: 1;
}

/* 节点 */
.knowledge-graph-node {
  cursor: pointer;
}

.knowledge-graph-node circle {
  fill: var(--color-primary);
  stroke: var(--bg-surface);
  stroke-width: 2;
  transition: all 0.2s;
}

.knowledge-graph-node text {
  fill: var(--text-secondary);
  font-size: 10px;
  pointer-events: none;
}

.knowledge-graph-node:hover circle {
  r: 10;
  fill: var(--color-primary-dark, #1a5a42);
}

.knowledge-graph-node.selected circle {
  fill: var(--color-primary);
  stroke: var(--color-primary-dark, #1a5a42);
  stroke-width: 3;
  r: 12;
}

/* 图例 */
.knowledge-graph-legend {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 16px;
}

.knowledge-graph-legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-secondary);
}

.knowledge-graph-legend-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.knowledge-graph-legend-dot.blog {
  background: var(--color-primary);
}

.knowledge-graph-legend-dot.note {
  background: var(--color-primary-light, #4daa7d);
}

/* 详情面板 */
.knowledge-graph-detail {
  padding: 16px;
  background: var(--bg-muted);
  border-radius: 8px;
  border-left: 3px solid var(--color-primary);
}

.knowledge-graph-detail h4 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

.knowledge-graph-detail-meta {
  display: flex;
  gap: 12px;
  margin-bottom: 12px;
}

.knowledge-graph-detail-type {
  font-size: 12px;
  padding: 2px 8px;
  background: var(--color-primary-alpha, rgba(45, 122, 95, 0.1));
  color: var(--color-primary);
  border-radius: 4px;
}

.knowledge-graph-detail-date {
  font-size: 12px;
  color: var(--text-tertiary);
}

.knowledge-graph-detail-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 12px;
}

.knowledge-graph-tag {
  padding: 4px 10px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  font-size: 12px;
  color: var(--text-secondary);
}

.knowledge-graph-detail-link {
  display: inline-block;
  padding: 8px 16px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 6px;
  font-size: 13px;
  text-decoration: none;
  transition: background 0.2s;
}

.knowledge-graph-detail-link:hover {
  background: var(--color-primary-dark, #1a5a42);
}

/* 加载和错误状态 */
.knowledge-graph-loading,
.knowledge-graph-error {
  text-align: center;
  padding: 40px;
  color: var(--text-tertiary);
  font-size: 14px;
}

/* 响应式 */
@media (max-width: 768px) {
  .knowledge-graph {
    padding: 16px;
  }
  
  .knowledge-graph-canvas svg {
    height: 300px;
  }
  
  .knowledge-graph-legend {
    flex-direction: column;
    align-items: center;
    gap: 8px;
  }
}