/**
 * KPN网络视图样式
 */

.kpn-graph-container {
    width: 100%;
    height: 600px;
    min-height: 400px;
    background: var(--ls-bg-secondary);
    border-radius: var(--ls-radius-md);
    border: 1px solid var(--ls-border-color);
    position: relative; /* 确保子元素的绝对定位相对于此容器 */
    overflow: hidden;
    /* 优化画布渲染性能 */
    will-change: transform;
    transform: translateZ(0);
}

.kpn-graph-controls {
    position: absolute;
    top: 16px;
    right: 16px;
    z-index: 100; /* 确保控制按钮在vis.js画布之上 */
    display: flex;
    gap: 8px;
    flex-direction: column;
    pointer-events: auto; /* 允许交互 */
}

.kpn-graph-control-btn {
    padding: 8px 12px;
    background: var(--ls-bg-primary);
    border: 1px solid var(--ls-border-color);
    border-radius: var(--ls-radius-sm);
    color: var(--ls-text-primary);
    cursor: pointer;
    font-size: 0.9rem;
    transition: var(--ls-transition);
    box-shadow: var(--ls-shadow-md);
}

.kpn-graph-control-btn:hover {
    background: var(--ls-bg-secondary);
    border-color: var(--ls-primary);
    color: var(--ls-primary);
}

.kpn-graph-legend {
    position: absolute;
    bottom: 16px;
    left: 16px;
    background: var(--ls-bg-primary);
    border: 1px solid var(--ls-border-color);
    border-radius: var(--ls-radius-md);
    padding: 16px;
    z-index: 100; /* 确保图例在vis.js画布之上 */
    box-shadow: var(--ls-shadow-md);
    min-width: 200px;
    pointer-events: auto; /* 允许交互 */
}

.kpn-graph-legend-title {
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--ls-text-primary);
    font-size: 0.9rem;
}

.kpn-graph-legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
    font-size: 0.85rem;
    color: var(--ls-text-secondary);
}

.kpn-graph-legend-color {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: 2px solid var(--ls-border-color);
}

.kpn-graph-legend-size {
    display: flex;
    align-items: center;
    gap: 4px;
}

.kpn-graph-legend-size-dot {
    border-radius: 50%;
    background: var(--ls-primary);
    border: 1px solid var(--ls-border-color);
}

/* AI推荐面板 */
.kpn-recommendations-panel {
    background: var(--ls-bg-primary);
    border: 1px solid var(--ls-border-color);
    border-radius: var(--ls-radius-md);
    padding: 16px;
    margin-top: 16px;
    box-shadow: var(--ls-shadow-md);
}

.kpn-recommendations-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    color: var(--ls-text-primary);
    font-weight: 600;
}

.kpn-recommendations-header i {
    color: #10b981;
}

.kpn-recommendations-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.kpn-recommendation-item {
    display: flex;
    align-items: start;
    gap: 12px;
    padding: 16px;
    background: var(--ls-bg-secondary);
    border-radius: var(--ls-radius-md);
    cursor: pointer;
    transition: var(--ls-transition);
    border: 2px solid var(--ls-border-color);
}

.kpn-recommendation-item:hover {
    background: var(--ls-bg-tertiary);
    border-color: var(--ls-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.15);
}

.kpn-recommendation-item.locked {
    opacity: 0.7;
    background: var(--ls-bg-tertiary);
}

.kpn-recommendation-item.locked:hover {
    opacity: 0.9;
}

.kpn-recommendation-label {
    padding: 4px 10px;
    background: var(--ls-primary-light);
    color: var(--ls-primary);
    border-radius: var(--ls-radius);
    font-size: 0.75rem;
    font-weight: 600;
    white-space: nowrap;
    flex-shrink: 0;
}

.kpn-recommendation-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.kpn-recommendation-header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
}

.kpn-recommendation-name {
    font-weight: 600;
    color: var(--ls-text-primary);
    font-size: 1rem;
}

.kpn-recommendation-badges {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.kpn-recommendation-stage-badge {
    padding: 4px 10px;
    background: var(--ls-bg-tertiary);
    color: var(--ls-text-secondary);
    border-radius: var(--ls-radius);
    font-size: 0.75rem;
    font-weight: 500;
    border: 1px solid var(--ls-border-color);
}

.kpn-recommendation-status-badge {
    padding: 4px 10px;
    border-radius: var(--ls-radius);
    font-size: 0.75rem;
    font-weight: 600;
}

.kpn-recommendation-status-badge.status-executable {
    background: rgba(16, 185, 129, 0.1);
    color: #10b981;
    border: 1px solid #10b981;
}

.kpn-recommendation-status-badge.status-locked {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border: 1px solid #ef4444;
}

.kpn-recommendation-reason {
    font-size: 0.85rem;
    color: var(--ls-text-secondary);
    line-height: 1.5;
}

.kpn-recommendation-unlock-info {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    background: rgba(239, 68, 68, 0.05);
    border-left: 3px solid #ef4444;
    border-radius: var(--ls-radius-sm);
    font-size: 0.8rem;
    color: var(--ls-text-secondary);
}

.kpn-recommendation-unlock-info i {
    color: #ef4444;
    font-size: 0.75rem;
}

.kpn-recommendation-actions {
    display: flex;
    gap: 8px;
    margin-top: 4px;
}

.kpn-recommendation-action-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: var(--ls-primary);
    color: white;
    border: none;
    border-radius: var(--ls-radius-md);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.kpn-recommendation-action-btn:hover {
    background: var(--ls-primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(79, 70, 229, 0.3);
}

.kpn-recommendation-action-btn:active {
    transform: translateY(0);
}

.kpn-recommendation-action-btn i {
    font-size: 0.75rem;
}

/* vis.js 网络节点样式优化（带圆角的长方形） */
.vis-network {
    font-family: var(--ls-font-family);
}

/* 确保节点标签在节点内部居中显示 */
.vis-network .vis-label {
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    padding: 0 6px;
    line-height: 1.2;
}

/* 带圆角的长方形节点样式 */
.vis-network .vis-node {
    border-radius: 8px !important;
}

/* 隐藏vis.js默认tooltip */
.vis-tooltip {
    display: none !important;
}

/* 自定义tooltip样式 - 固定在容器右上角 */
.kpn-custom-tooltip {
    position: absolute;
    top: 16px;
    right: 16px;
    background: rgba(17, 24, 39, 0.98);
    border: 1px solid rgba(75, 85, 99, 0.6);
    border-radius: 8px;
    padding: 14px 16px;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
    max-width: 320px;
    min-width: 200px;
    font-family: var(--ls-font-family);
    font-size: 13px;
    line-height: 1.6;
    z-index: 150; /* 确保tooltip在图例和控制按钮之上 */
    pointer-events: none;
    display: none;
    color: #ffffff;
    backdrop-filter: blur(10px);
}

.kpn-custom-tooltip strong {
    color: #d1d5db;
    font-weight: 600;
}

.kpn-custom-tooltip hr {
    border: none;
    border-top: 1px solid rgba(55, 65, 81, 0.8);
    margin: 12px 0;
}

.kpn-custom-tooltip div {
    margin-bottom: 6px;
}

.kpn-custom-tooltip div:last-child {
    margin-bottom: 0;
}

/* 带圆角长方形节点悬停效果 */
.vis-network .vis-node {
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.vis-network .vis-node:hover {
    filter: brightness(1.2);
    transform: scale(1.08);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3) !important;
}

/* 路径高亮节点的动画效果 */
.vis-network .vis-node[style*="border-color: rgb(16, 185, 129)"] {
    animation: pathHighlightPulse 2s ease-in-out infinite;
}

@keyframes pathHighlightPulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
    }
    50% {
        box-shadow: 0 0 0 8px rgba(16, 185, 129, 0);
    }
}

/* 弱化节点的样式 */
.vis-network .vis-node[style*="opacity: 0.15"] {
    filter: blur(0.5px) grayscale(0.6);
    transition: all 0.3s ease;
}

/* 连接线过渡动画和样式优化 */
.vis-network .vis-edge {
    transition: all 0.25s ease;
    stroke-linecap: round;
}

.vis-network .vis-edge:hover {
    stroke-width: 2.5 !important;
}

/* 优化连接线的箭头 */
.vis-network .vis-arrow {
    fill: currentColor;
}

/* 优化网络图的整体视觉效果 */
.vis-network canvas {
    outline: none;
}

/* 选中节点的样式 */
.vis-network .vis-node.vis-selected {
    box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.5) !important;
    border-width: 3px !important;
}

/* 优化节点标签的可读性 */
.vis-network .vis-label {
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
    font-weight: 600;
}

/* 连接线的优化样式 */
.vis-network .vis-edge.vis-selected {
    stroke-width: 2.5 !important;
}

/* 优化网络图的交互反馈 */
.vis-network:active {
    cursor: grabbing;
}

.vis-network {
    cursor: grab;
}

/* 优化路径高亮时的连接线 */
.vis-network .vis-edge[style*="rgb(16, 185, 129)"] {
    stroke-width: 2 !important;
    filter: drop-shadow(0 0 2px rgba(16, 185, 129, 0.5));
}

/* 响应式设计 */
@media (max-width: 768px) {
    .kpn-graph-container {
        height: 400px;
    }

    .kpn-graph-controls {
        top: 8px;
        right: 8px;
    }

    .kpn-graph-legend {
        bottom: 8px;
        left: 8px;
        padding: 12px;
        font-size: 0.8rem;
    }

    .kpn-recommendations-panel {
        padding: 12px;
    }

    .kpn-recommendation-item {
        padding: 12px;
    }

    .kpn-recommendation-header-row {
        flex-direction: column;
        align-items: flex-start;
    }

    .kpn-recommendation-action-btn {
        width: 100%;
        justify-content: center;
    }

    .vis-tooltip {
        max-width: 280px !important;
        font-size: 12px !important;
        padding: 10px !important;
    }

    /* 移动端优化节点大小 */
    .vis-network .vis-label {
        font-size: 11px !important;
    }
}

/* 阶段过滤样式 */
.vis-network .vis-node.stage-current {
    border-width: 3px !important;
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.3) !important;
}

.vis-network .vis-node.stage-completed {
    opacity: 0.6 !important;
    filter: grayscale(0.3);
}

.vis-network .vis-node.stage-future {
    opacity: 0.4 !important;
    filter: grayscale(0.5);
}

.vis-network .vis-node.stage-other {
    opacity: 0.2 !important;
    filter: grayscale(0.8);
}

.vis-network .vis-edge.stage-current {
    opacity: 1 !important;
}

.vis-network .vis-edge.stage-connects {
    opacity: 0.5 !important;
}

.vis-network .vis-edge.stage-other {
    opacity: 0.1 !important;
}

/* 语义标签显示（在节点上） */
.vis-network .vis-node[data-semantic-tags*="core"] {
    border-color: #fbbf24 !important;
    border-width: 3px !important;
}

.vis-network .vis-node[data-semantic-tags*="prerequisite"] {
    border-color: #3b82f6 !important;
}

.vis-network .vis-node[data-semantic-tags*="extension"] {
    border-color: #8b5cf6 !important;
}

.vis-network .vis-node[data-semantic-tags*="application"] {
    border-color: #10b981 !important;
}

/* 学习进度可视化样式 */
/* 高掌握度节点（可应用，81-100%）：粗边框 + 轻微发光 */
.vis-network .vis-node[data-mastery-level="high"] {
    box-shadow: 0 0 8px rgba(16, 185, 129, 0.4) !important;
    transition: box-shadow 0.3s ease;
}

/* 已内化节点（95%+）：双边框效果 */
.vis-network .vis-node[data-mastery-level="internalized"] {
    box-shadow: 
        0 0 0 2px rgba(139, 92, 246, 0.3),
        0 0 12px rgba(139, 92, 246, 0.5) !important;
    transition: box-shadow 0.3s ease;
}

/* 进度条样式（用于tooltip） */
.kpn-tooltip-progress-bar {
    width: 100%;
    height: 6px;
    background: rgba(55, 65, 81, 0.8);
    border-radius: 3px;
    overflow: hidden;
    margin-top: 8px;
}

.kpn-tooltip-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #10b981, #059669);
    border-radius: 3px;
    transition: width 0.3s ease;
}

.kpn-tooltip-progress-fill.state-unvisited {
    background: #6b7280;
}

.kpn-tooltip-progress-fill.state-contacted {
    background: linear-gradient(90deg, #fbbf24, #f59e0b);
}

.kpn-tooltip-progress-fill.state-understood {
    background: linear-gradient(90deg, #3b82f6, #2563eb);
}

.kpn-tooltip-progress-fill.state-applicable {
    background: linear-gradient(90deg, #10b981, #059669);
}

.kpn-tooltip-progress-fill.state-internalized {
    background: linear-gradient(90deg, #8b5cf6, #7c3aed);
}