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

:root {
    --color-ai-infrastructure: #3b82f6;
    --color-vc-pattern: #10b981;
    --color-enterprise-ai: #f97316;
    --color-agentic: #8b5cf6;
    --color-cross-theme: #6366f1;
    --color-sources: #64748b;

    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-hover: #f1f5f9;
    --border-color: #e2e8f0;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-light: #94a3b8;

    --sidebar-width: 280px;
    --viewer-width: 420px;
    --header-height: 48px;
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 16px;
    --spacing-xl: 24px;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);

    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-mono: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
}

html, body {
    width: 100%;
    height: 100%;
    font-family: var(--font-family);
    color: var(--text-primary);
    background: var(--bg-primary);
}

/* ===== DEMO BANNER ===== */

.demo-banner {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8px 16px;
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: #451a03;
    font-size: 13px;
    font-weight: 500;
    text-align: center;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.demo-banner a {
    color: #451a03;
    font-weight: 600;
    text-decoration: underline;
    text-underline-offset: 2px;
}

.demo-banner a:hover {
    color: #1c0a00;
}

.container {
    display: flex;
    width: 100%;
    height: 100vh;
}

body:has(.demo-banner[style*="display: flex"]) .container {
    height: calc(100vh - 37px);
}

/* ===== SIDEBAR ===== */

.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    overflow-x: hidden;
}

.sidebar-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.app-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.search-box {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    position: relative;
}

.search-input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    padding-right: 28px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 13px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-family);
}

.search-input:focus {
    outline: none;
    border-color: var(--color-ai-infrastructure);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.search-clear {
    position: absolute;
    right: calc(var(--spacing-lg) + 4px);
    top: 35%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    font-size: 16px;
    display: none;
    width: 20px;
    height: 20px;
    padding: 0;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.search-clear.active {
    display: flex;
}

.search-clear:hover {
    color: var(--text-secondary);
}

.search-mode-toggle {
    margin-top: var(--spacing-sm);
}

.toggle-pill {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 11px;
    color: var(--text-secondary);
    cursor: pointer;
    user-select: none;
}

.toggle-pill input[type="checkbox"] {
    width: 14px;
    height: 14px;
    accent-color: var(--color-ai-infrastructure);
    cursor: pointer;
}

.toggle-label {
    font-weight: 500;
}

/* ===== EMBEDDING INDEX STATUS ===== */

.embedding-index-status {
    padding: var(--spacing-sm) var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
}

.index-status-text {
    font-size: 11px;
    color: var(--text-light);
    flex: 1;
}

.btn-build-index {
    font-size: 11px;
    padding: 3px 8px;
    background: var(--bg-primary);
    border: 1px solid var(--color-ai-infrastructure);
    border-radius: 4px;
    color: var(--color-ai-infrastructure);
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.btn-build-index:hover {
    background: var(--color-ai-infrastructure);
    color: white;
}

.btn-build-index:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* ===== SEARCH RESULTS ===== */

.search-results {
    border-bottom: 1px solid var(--border-color);
    max-height: 50vh;
    overflow-y: auto;
    flex-shrink: 0;
}

.search-results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
    position: sticky;
    top: 0;
    z-index: 1;
}

.search-results-count {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-secondary);
}

.search-results-mode {
    font-size: 10px;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 2px 6px;
    background: var(--bg-hover);
    border-radius: 3px;
}

.search-results-list {
    padding: var(--spacing-sm);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.search-result-card {
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--bg-primary);
    cursor: pointer;
    transition: all 0.15s ease;
}

.search-result-card:hover {
    background: var(--bg-hover);
    border-color: var(--color-ai-infrastructure);
}

.result-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}

.result-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.3;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.result-score {
    font-size: 10px;
    font-weight: 600;
    color: var(--color-ai-infrastructure);
    background: rgba(59, 130, 246, 0.1);
    padding: 2px 5px;
    border-radius: 3px;
    white-space: nowrap;
    flex-shrink: 0;
}

.result-card-meta {
    margin-bottom: var(--spacing-xs);
}

.result-theme-pill {
    font-size: 10px;
    color: white;
    padding: 1px 6px;
    border-radius: 3px;
    font-weight: 500;
    display: inline-block;
}

.result-snippet {
    font-size: 11px;
    color: var(--text-secondary);
    line-height: 1.4;
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.themes-section {
    flex: 1;
    padding: var(--spacing-lg);
    overflow-y: auto;
}

.section-title {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
    letter-spacing: 0.5px;
}

.theme-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.theme-item {
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--bg-primary);
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 13px;
}

.theme-item:hover {
    background: var(--bg-hover);
    border-color: #cbd5e1;
}

.theme-item.active {
    background: var(--bg-hover);
    border-color: var(--color-ai-infrastructure);
    font-weight: 500;
}

.theme-color-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.theme-info {
    flex: 1;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.theme-name {
    font-size: 13px;
    font-weight: 500;
}

.theme-count {
    font-size: 11px;
    color: var(--text-light);
    background: var(--border-color);
    padding: 2px 6px;
    border-radius: 4px;
    min-width: 20px;
    text-align: center;
}

.actions-section {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

.btn-refresh {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--color-ai-infrastructure);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.btn-refresh:hover {
    background: #2563eb;
    box-shadow: var(--shadow-md);
}

.btn-refresh:active {
    transform: scale(0.98);
}

.btn-icon {
    display: inline-block;
    font-size: 14px;
}

.btn-refresh.loading {
    opacity: 0.7;
    cursor: not-allowed;
}

.btn-refresh.loading .btn-icon {
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.refresh-status {
    font-size: 11px;
    color: var(--text-light);
    margin-top: var(--spacing-sm);
    text-align: center;
    min-height: 16px;
}

.refresh-status.success {
    color: var(--color-vc-pattern);
}

.refresh-status.error {
    color: #ef4444;
}

.sidebar-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    font-size: 12px;
    color: var(--text-light);
    text-align: center;
}

/* ===== GRAPH CONTAINER ===== */

.graph-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
    background: var(--bg-primary);
    border-right: 1px solid var(--border-color);
}

.graph-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

.view-controls {
    display: flex;
    gap: var(--spacing-sm);
}

.btn-control {
    width: 36px;
    height: 36px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
}

.btn-control:hover {
    background: var(--bg-hover);
    border-color: #cbd5e1;
}

.btn-control:active {
    transform: scale(0.95);
}

.graph-stats {
    font-size: 12px;
    color: var(--text-secondary);
}

#knowledge-graph {
    flex: 1;
    width: 100%;
    height: 100%;
}

.loading-indicator {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    display: none;
    z-index: 10;
}

.loading-indicator.active {
    display: block;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--color-ai-infrastructure);
    border-radius: 50%;
    margin: 0 auto var(--spacing-md);
    animation: spin 0.8s linear infinite;
}

.loading-indicator p {
    color: var(--text-secondary);
    font-size: 14px;
}

/* D3 Graph Styling */

.node {
    cursor: pointer;
    transition: all 0.2s ease;
}

.node circle {
    stroke-width: 2px;
    stroke: var(--bg-primary);
}

.node:hover circle {
    stroke-width: 3px;
    filter: brightness(1.1);
}

.node.dimmed circle {
    opacity: 0.2;
}

.node.highlighted circle {
    stroke-width: 3px;
    filter: brightness(1.2);
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.3);
}

.node-label {
    font-size: 11px;
    pointer-events: none;
    text-anchor: middle;
    fill: var(--text-primary);
    font-weight: 500;
    text-shadow: 0 0 3px var(--bg-primary), 0 0 3px var(--bg-primary);
}

.node-label.dimmed {
    opacity: 0.3;
}

.link {
    stroke: var(--border-color);
    stroke-width: 1.5px;
    fill: none;
}

.link.dimmed {
    opacity: 0.1;
}

.orphan-node circle {
    stroke-dasharray: 4, 4;
    fill: none;
}

.tooltip {
    position: absolute;
    background: var(--text-primary);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 4px;
    font-size: 12px;
    z-index: 100;
    pointer-events: none;
    display: none;
    box-shadow: var(--shadow-md);
    max-width: 200px;
}

.tooltip.active {
    display: block;
}

/* ===== VIEWER ===== */

.viewer {
    width: var(--viewer-width);
    background: var(--bg-secondary);
    border-left: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    overflow-x: hidden;
}

.viewer-empty {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-light);
    text-align: center;
    padding: var(--spacing-xl);
}

.viewer-empty p {
    font-size: 14px;
}

.insight-detail {
    padding: var(--spacing-lg);
}

.insight-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: var(--spacing-lg);
}

.insight-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    flex: 1;
    line-height: 1.4;
}

.btn-close {
    background: none;
    border: none;
    font-size: 18px;
    cursor: pointer;
    color: var(--text-light);
    padding: 0;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.btn-close:hover {
    color: var(--text-primary);
}

.insight-metadata {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.metadata-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
}

.metadata-label {
    color: var(--text-light);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    font-size: 10px;
}

.metadata-value {
    color: var(--text-primary);
    font-size: 13px;
}

.novelty-display {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.novelty-stars {
    font-size: 12px;
    letter-spacing: 2px;
}

.novelty-score {
    font-size: 12px;
    color: var(--text-secondary);
}

.concepts-section,
.tags-section {
    margin-bottom: var(--spacing-lg);
}

.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.tag {
    font-size: 11px;
    padding: 4px 8px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-secondary);
    white-space: nowrap;
}

.insight-actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.btn-secondary {
    padding: var(--spacing-md);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: var(--bg-hover);
    border-color: #cbd5e1;
}

.btn-secondary:active {
    transform: scale(0.98);
}

.insight-content {
    font-size: 13px;
    line-height: 1.6;
    color: var(--text-primary);
}

.insight-content h1,
.insight-content h2,
.insight-content h3,
.insight-content h4,
.insight-content h5,
.insight-content h6 {
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    font-weight: 600;
}

.insight-content h1 { font-size: 16px; }
.insight-content h2 { font-size: 15px; }
.insight-content h3 { font-size: 14px; }
.insight-content h4,
.insight-content h5,
.insight-content h6 { font-size: 13px; }

.insight-content p {
    margin-bottom: var(--spacing-md);
}

.insight-content ul,
.insight-content ol {
    margin-left: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.insight-content li {
    margin-bottom: var(--spacing-sm);
}

.insight-content pre {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: var(--spacing-md);
    overflow-x: auto;
    margin-bottom: var(--spacing-md);
    font-size: 12px;
    font-family: var(--font-mono);
    line-height: 1.5;
}

.insight-content code {
    font-family: var(--font-mono);
    background: var(--bg-primary);
    padding: 2px 4px;
    border-radius: 3px;
    font-size: 12px;
}

.insight-content pre code {
    background: none;
    padding: 0;
}

.insight-content blockquote {
    border-left: 3px solid var(--border-color);
    margin: var(--spacing-md) 0;
    padding-left: var(--spacing-md);
    color: var(--text-secondary);
    font-style: italic;
}

.wikilink {
    color: var(--color-ai-infrastructure);
    cursor: pointer;
    text-decoration: none;
    border-bottom: 1px dotted var(--color-ai-infrastructure);
}

.wikilink:hover {
    text-decoration: underline;
}

.wikilink-orphan {
    color: var(--text-light);
    cursor: default;
    text-decoration: none;
    opacity: 0.6;
}

/* ===== RESPONSIVE ===== */

@media (max-width: 1400px) {
    :root {
        --sidebar-width: 240px;
        --viewer-width: 380px;
    }
}

@media (max-width: 1200px) {
    .sidebar,
    .viewer {
        display: none;
    }

    .container {
        max-width: 100%;
    }
}

/* ===== SCROLLBARS ===== */

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #cbd5e1;
}