/* ============== 统一图谱设计令牌 ============== */

:root {
    --kg-bg-base: #0d1117;
    --kg-bg-elevated: #161b22;
    --kg-bg-card: #21262d;
    --kg-bg-input: #0d1117;
    --kg-bg-hover: #30363d;

    /* 边框 */
    --kg-border: #30363d;
    --kg-border-subtle: #21262d;

    /* 文字 */
    --kg-text-primary: #e6edf3;
    --kg-text-secondary: #8b949e;
    --kg-text-tertiary: #484f58;

    /* Accent 强调色（GitHub 风） */
    --kg-accent-purple: #2db7c4;
    --kg-accent-blue: #2db7c4;
    --kg-accent-green: #3fb950;
    --kg-accent-amber: #d29922;
    --kg-accent-red: #f85149;
    --kg-accent-pink: #ff7b72;

    /* 资源类型徽章（Tailwind 风格柔和色板） */
    --kg-tag-video:        #2563eb;  /* blue-600 */
    --kg-tag-microcourse:  #9333ea;  /* purple-600 */
    --kg-tag-animation:    #0d9488;  /* teal-600 */
    --kg-tag-skillvideo:   #ea580c;  /* orange-600 */
    --kg-tag-ppt:          #dc2626;  /* red-600 */
    --kg-tag-pdf:          #475569;  /* slate-600 */
    --kg-tag-cert:         #ca8a04;  /* yellow-600 */
    --kg-tag-other:        #6b7280;  /* gray-500 */
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Source Han Sans SC', 'Microsoft YaHei', sans-serif;
    background: var(--kg-bg-base);
    color: var(--kg-text-primary);
    height: 100vh;
    overflow: hidden;
}

.app {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

/* ============== 工具栏 ============== */
.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 20px;
    background: var(--kg-bg-elevated);
    border-bottom: 1px solid var(--kg-border);
}

.toolbar h1 {
    font-size: 18px;
    font-weight: 500;
    color: var(--kg-text-primary);
}

.toolbar-actions {
    display: flex;
    gap: 12px;
    align-items: center;
}

.btn, .upload-btn {
    padding: 8px 16px;
    border: 1px solid var(--kg-border);
    border-radius: 6px;
    background: var(--kg-bg-card);
    color: var(--kg-text-primary);
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
}

.btn:hover, .upload-btn:hover {
    background: var(--kg-accent-purple);
    border-color: var(--kg-accent-purple);
    color: #fff;
}

select {
    padding: 8px 12px;
    border: 1px solid var(--kg-border);
    border-radius: 6px;
    background: var(--kg-bg-card);
    color: var(--kg-text-primary);
    cursor: pointer;
    font-size: 14px;
}

/* 开关标签 */
.toggle-label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--kg-text-secondary);
    cursor: pointer;
    padding: 6px 10px;
    background: var(--kg-bg-card);
    border: 1px solid var(--kg-border);
    border-radius: 6px;
    transition: all 0.2s;
}

.toggle-label:hover {
    background: var(--kg-bg-hover);
    color: var(--kg-text-primary);
}

.toggle-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--kg-accent-amber);
    cursor: pointer;
}

/* ============== 主内容区 ============== */
.content {
    flex: 1;
    display: flex;
    position: relative;
    overflow: hidden;
}

#graphContainer {
    flex: 1;
    background: var(--kg-bg-base);
    position: relative;
}

.placeholder {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: var(--kg-text-tertiary);
}

.placeholder p {
    margin: 8px 0;
}

.placeholder .hint {
    font-size: 12px;
    color: var(--kg-text-tertiary);
}

/* ============== 属性面板 ============== */
.panel {
    width: min(400px, 92vw);
    background: var(--kg-bg-elevated);
    border-left: 1px solid var(--kg-border);
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease;
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    z-index: 100;
    transform: translateX(0);
    box-shadow: -12px 0 30px rgba(0, 0, 0, 0.42);
}

.panel.hidden {
    transform: translateX(100%);
    pointer-events: none;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    border-bottom: 1px solid var(--kg-border);
}

.panel-header h3 {
    font-size: 15px;
    font-weight: 600;
    color: var(--kg-text-primary);
}

.close-btn {
    background: none;
    border: none;
    color: var(--kg-text-secondary);
    font-size: 20px;
    cursor: pointer;
    padding: 0 4px;
}

.close-btn:hover {
    color: var(--kg-accent-red);
}

.panel-content {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
}

/* 属性项 */
.prop-item {
    margin-bottom: 16px;
}

.prop-label {
    font-size: 13px;
    color: var(--kg-text-secondary);
    margin-bottom: 6px;
    font-weight: 500;
}

.prop-value {
    font-size: 14px;
    color: var(--kg-text-primary);
    word-break: break-all;
    line-height: 1.6;
    padding: 10px 12px;
    background: var(--kg-bg-card);
    border: 1px solid var(--kg-border-subtle);
    border-radius: 4px;
}

.prop-value.empty {
    color: var(--kg-text-tertiary);
}

.kg-traceability {
    margin-top: 20px;
    border-top: 1px solid var(--kg-border-subtle);
    padding-top: 14px;
    color: var(--kg-text-secondary);
    font-size: 13px;
}

.kg-traceability summary {
    cursor: pointer;
    user-select: none;
    font-weight: 500;
}

.kg-traceability-content {
    display: grid;
    gap: 10px;
    margin-top: 12px;
}

.kg-traceability-row {
    display: grid;
    grid-template-columns: minmax(72px, auto) minmax(0, 1fr);
    gap: 12px;
    align-items: start;
}

.kg-traceability-row strong {
    color: var(--kg-text-primary);
    font-weight: 400;
    line-height: 1.5;
    overflow-wrap: anywhere;
}

.url-btn {
    display: inline-block;
    padding: 6px 14px;
    background: var(--kg-accent-blue);
    color: #fff;
    border-radius: 6px;
    text-decoration: none;
    font-size: 13px;
}

.url-btn:hover {
    background: #79c0ff;
    color: #000;
}

/* 节点名称高亮 */
.node-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--kg-text-primary);
    padding: 12px;
    background: var(--kg-bg-card);
    border-radius: 6px;
    margin-bottom: 16px;
    text-align: center;
}

.node-context {
    margin: -6px 0 14px;
    color: var(--kg-text-secondary);
    font-size: 13px;
    text-align: center;
}

/* 关系列表 */
.relations-section {
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--kg-border-subtle);
}

.relations-section h4 {
    font-size: 13px;
    color: var(--kg-text-secondary);
    margin-bottom: 10px;
    font-weight: 500;
}

.relation-item {
    display: flex;
    align-items: center;
    padding: 10px 12px;
    background: var(--kg-bg-card);
    border-radius: 4px;
    margin-bottom: 8px;
    font-size: 14px;
    color: var(--kg-text-primary);
    gap: 10px;
}

.relation-item .arrow {
    color: var(--kg-accent-blue);
    margin: 0 10px;
    font-weight: bold;
    flex-shrink: 0;
}

.relation-item .relation-type {
    color: var(--kg-text-secondary);
    font-size: 11px;
    margin-left: auto;
    background: var(--kg-bg-base);
    padding: 3px 8px;
    border-radius: 3px;
    flex-shrink: 0;
}

/* 状态栏 */
.statusbar {
    display: flex;
    justify-content: space-between;
    padding: 8px 20px;
    background: var(--kg-bg-elevated);
    border-top: 1px solid var(--kg-border);
    font-size: 12px;
    color: var(--kg-text-secondary);
}

/* 节点提示 */
.cy-tooltip {
    position: absolute;
    background: var(--kg-bg-elevated);
    border: 1px solid var(--kg-border);
    padding: 8px 12px;
    border-radius: 4px;
    font-size: 12px;
    color: var(--kg-text-primary);
    pointer-events: none;
    z-index: 1000;
    max-width: 200px;
}

.node-tooltip {
    background: rgba(22, 27, 34, 0.95);
    padding: 8px 12px;
    border-radius: 4px;
    font-size: 13px;
    color: var(--kg-text-primary);
    border: 1px solid var(--kg-accent-purple);
    max-width: 250px;
    word-break: break-all;
}

.graph-tooltip {
    pointer-events: none;
}

/* canvas */
#graphContainer canvas {
    display: block;
}

/* 场景信息覆盖层 */
.scene-info-msg {
    position: absolute;
    bottom: 20px;
    left: 20px;
    background: rgba(22, 27, 34, 0.8);
    padding: 10px 15px;
    border-radius: 6px;
    font-size: 12px;
    color: var(--kg-text-secondary);
    pointer-events: none;
}

/* 加载状态 */
.loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--kg-accent-purple);
}

.loading::after {
    content: '';
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--kg-accent-purple);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-left: 8px;
    vertical-align: middle;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* 搜索高亮 */
.highlighted {
    box-shadow: 0 0 20px var(--kg-accent-purple);
}

/* 调试面板 */
.debug-panel {
    display: flex;
    gap: 20px;
    padding: 10px 20px;
    background: var(--kg-bg-elevated);
    border-bottom: 1px solid var(--kg-border);
    flex-wrap: wrap;
}

.debug-panel.hidden {
    display: none;
}

.debug-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 150px;
}

.debug-item label {
    font-size: 12px;
    color: var(--kg-text-secondary);
}

.debug-item label span {
    color: var(--kg-accent-purple);
    font-weight: bold;
}

.debug-item input[type="range"] {
    width: 150px;
    height: 6px;
    background: var(--kg-bg-card);
    border-radius: 3px;
    outline: none;
    cursor: pointer;
    -webkit-appearance: none;
}

.debug-item input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    background: var(--kg-accent-purple);
    border-radius: 50%;
    cursor: pointer;
}

.debug-item input[type="range"]::-webkit-slider-thumb:hover {
    background: #b685ff;
}

/* 层级半径滑动条容器 */
.level-radius-container {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

@media (max-width: 860px) {
    .graph-console-nav {
        grid-template-columns: 1fr;
        padding: 10px 14px;
    }

    .graph-console-nav #cloudStatusText {
        justify-self: start;
    }

    .toolbar {
        align-items: stretch;
        flex-direction: column;
        gap: 10px;
    }

    .toolbar-actions {
        flex-wrap: wrap;
    }

    .panel { width: min(100vw, 420px); }
}

@media (max-width: 700px) {
    .panel {
        top: auto;
        width: 100vw;
        max-width: none;
        height: min(72vh, 620px);
        border-top: 1px solid var(--kg-border);
        border-left: 0;
        box-shadow: 0 -12px 30px rgba(0, 0, 0, 0.48);
        transform: translateY(0);
    }

    .panel.hidden { transform: translateY(100%); }
}