/* 知识图谱样式 */
.graph-container {
  width: 100%;
  height: 600px;
  border: 1px solid var(--md-default-fg-color--lighter);
  border-radius: 8px;
  margin: 20px 0;
  background: var(--md-code-bg-color);
  position: relative;
  overflow: hidden;
}

.graph-svg {
  width: 100%;
  height: 100%;
}

/* 图谱控制按钮 */
.graph-controls {
  margin: 10px 0;
  text-align: center;
  padding: 10px;
  background: var(--md-default-bg-color);
  border-radius: 4px;
}

.graph-controls button {
  margin: 0 8px;
  padding: 8px 16px;
  border: 1px solid var(--md-primary-fg-color);
  background: transparent;
  color: var(--md-primary-fg-color);
  cursor: pointer;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s ease;
}

.graph-controls button:hover {
  background: var(--md-primary-fg-color);
  color: var(--md-primary-bg-color);
  transform: translateY(-1px);
}

.graph-controls button.active {
  background: var(--md-primary-fg-color);
  color: var(--md-primary-bg-color);
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

/* 图谱节点样式 */
.node {
  cursor: pointer;
  stroke: var(--md-default-bg-color);
  stroke-width: 3px;
  transition: all 0.3s ease;
}

.node:hover {
  stroke-width: 4px;
  filter: brightness(1.1);
}

/* 中文节点 - 靛蓝色 */
.node.zh {
  fill: #3f51b5;
}

.node.zh.category {
  fill: #5c6bc0;
}

.node.zh.main {
  fill: #303f9f;
}

/* 英文节点 - 粉色 */
.node.en {
  fill: #e91e63;
}

.node.en.category {
  fill: #ec407a;
}

.node.en.main {
  fill: #c2185b;
}

/* 链接样式 */
.link {
  stroke: var(--md-default-fg-color--lighter);
  stroke-opacity: 0.6;
  stroke-width: 2px;
  transition: all 0.3s ease;
}

.link:hover {
  stroke-opacity: 1;
  stroke-width: 3px;
}

/* 节点文本样式 */
.node-text {
  font-family: var(--md-text-font-family);
  font-size: 12px;
  font-weight: 500;
  text-anchor: middle;
  pointer-events: none;
  fill: var(--md-default-fg-color);
  text-shadow: 1px 1px 2px rgba(0,0,0,0.5);
}

/* 工具提示 */
.graph-tooltip {
  position: absolute;
  background: var(--md-default-bg-color);
  border: 1px solid var(--md-default-fg-color--lighter);
  border-radius: 4px;
  padding: 8px 12px;
  font-size: 12px;
  pointer-events: none;
  z-index: 1000;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.graph-tooltip.visible {
  opacity: 1;
}

/* 图例 */
.graph-legend {
  position: absolute;
  top: 10px;
  right: 10px;
  background: var(--md-default-bg-color);
  border: 1px solid var(--md-default-fg-color--lighter);
  border-radius: 4px;
  padding: 10px;
  font-size: 12px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.graph-legend-item {
  display: flex;
  align-items: center;
  margin: 4px 0;
}

.graph-legend-color {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  margin-right: 8px;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .graph-container {
    height: 400px;
  }
  
  .graph-controls {
    padding: 8px;
  }
  
  .graph-controls button {
    margin: 4px;
    padding: 6px 12px;
    font-size: 12px;
  }
  
  .node-text {
    font-size: 10px;
  }
  
  .graph-legend {
    position: relative;
    top: auto;
    right: auto;
    margin: 10px 0;
  }
}

/* 加载动画 */
.graph-loading {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;
  font-size: 16px;
  color: var(--md-default-fg-color--light);
}

.graph-loading::after {
  content: '';
  width: 20px;
  height: 20px;
  border: 2px solid var(--md-primary-fg-color);
  border-top: 2px solid transparent;
  border-radius: 50%;
  margin-left: 10px;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* 搜索框样式 */
.graph-search {
  margin: 10px 0;
  text-align: center;
}

.graph-search input {
  padding: 8px 12px;
  border: 1px solid var(--md-default-fg-color--lighter);
  border-radius: 4px;
  background: var(--md-default-bg-color);
  color: var(--md-default-fg-color);
  font-size: 14px;
  width: 200px;
}

.graph-search input:focus {
  outline: none;
  border-color: var(--md-primary-fg-color);
}

/* 高亮节点 */
.node.highlighted {
  stroke: #ff9800;
  stroke-width: 4px;
  filter: brightness(1.2);
}

.link.highlighted {
  stroke: #ff9800;
  stroke-opacity: 1;
  stroke-width: 3px;
}

/* 全屏模式样式 */
.graph-fullscreen {
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  width: 100vw !important;
  height: 100vh !important;
  z-index: 9999 !important;
  background: var(--md-default-bg-color) !important;
  margin: 0 !important;
  padding: 20px !important;
  box-sizing: border-box !important;
}

.graph-fullscreen .graph-svg {
  width: 100% !important;
  height: calc(100vh - 120px) !important;
}

.graph-fullscreen .graph-controls {
  position: relative !important;
  z-index: 10000 !important;
  background: var(--md-default-bg-color) !important;
  padding: 15px !important;
  border-radius: 8px !important;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1) !important;
  margin-bottom: 15px !important;
  border: 1px solid var(--md-default-fg-color--lighter) !important;
}

.graph-fullscreen .graph-info {
  position: absolute !important;
  bottom: 20px !important;
  right: 20px !important;
  z-index: 10000 !important;
}

/* 全屏按钮样式 */
.fullscreen-btn {
  background: var(--md-primary-fg-color);
  color: var(--md-primary-bg-color);
  border: none;
  padding: 8px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
  transition: all 0.2s ease;
  margin-left: 10px;
}

.fullscreen-btn:hover {
  background: var(--md-accent-fg-color);
  transform: translateY(-1px);
}

.fullscreen-btn:active {
  transform: translateY(0);
}

/* 退出全屏提示 */
.fullscreen-hint {
  position: fixed;
  top: 40px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,0.85);
  color: white;
  padding: 10px 20px;
  border-radius: 25px;
  font-size: 14px;
  font-weight: 500;
  z-index: 10001;
  pointer-events: none;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
  animation: fadeInOut 3s ease-in-out;
}

@keyframes fadeInOut {
  0%, 100% { opacity: 0; }
  10%, 90% { opacity: 1; }
}

/* 全屏模式下的节点和文字样式调整 */
.graph-fullscreen .node {
  stroke-width: 2px;
}

.graph-fullscreen .node-text {
  font-size: 16px !important;
  font-weight: 500;
}

.graph-fullscreen .link {
  stroke-width: 2px;
}

/* 防止页面滚动 */
body.graph-fullscreen-active {
  overflow: hidden !important;
}