/**
 * Frontend CSS
 * Save as: assets/frontend.css
 */

:root {
    --tc-kg-bg-primary: #faf8f4;
    --tc-kg-bg-secondary: #ffffff;
    --tc-kg-bg-tertiary: #f5f1e8;
    --tc-kg-text-primary: #1a1a1a;
    --tc-kg-text-secondary: #666666;
    --tc-kg-text-tertiary: #999999;
    --tc-kg-border-color: #e8e4dc;
    --tc-kg-accent-gradient: linear-gradient(180deg, #f4d03f 0%, #ff8fa3 50%, #7dd3c0 100%);
    --tc-kg-node-evergreen: #66bb6a;
    --tc-kg-node-growing: #ffa726;
    --tc-kg-node-seedling: #42a5f5;
    --tc-kg-node-post: #bdbdbd;
    --tc-kg-node-concept-theme: #9c27b0;
    --tc-kg-node-concept-framework: #2196f3;
    --tc-kg-node-concept-methodology: #4caf50;
    --tc-kg-node-concept-question: #ff5722;
}

/* Dark mode support - check for both data-theme and class */
[data-theme="dark"],
.dark {
    --tc-kg-bg-primary: #0c0a09;
    --tc-kg-bg-secondary: #1c1917;
    --tc-kg-bg-tertiary: #292524;
    --tc-kg-text-primary: #fafaf9;
    --tc-kg-text-secondary: #d6d3d1;
    --tc-kg-text-tertiary: #a8a29e;
    --tc-kg-border-color: #44403c;
}

/* Ensure dark mode applies to nested elements */
.dark .tc-kg-graph-wrapper,
.dark .tc-kg-graph-container,
.dark .tc-kg-tooltip {
    color-scheme: dark;
}

.tc-kg-graph-wrapper {
    font-family: Georgia, 'Times New Roman', serif;
    max-width: 1400px;
    margin: 2rem auto 0 auto;
    padding: 0 1rem 2rem 1rem;
}

.tc-kg-graph-container {
    position: relative;
    background: var(--tc-kg-bg-secondary);
    border: 1px solid var(--tc-kg-border-color);
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 1.5rem;
    height: 500px;
}

.tc-kg-graph {
    background: var(--tc-kg-bg-tertiary);
    width: 100%;
    height: 100%;
    touch-action: none;
}

.tc-kg-link {
    stroke: #cbd5e0;
    stroke-opacity: 0.4;
}

.dark .tc-kg-link {
    stroke: #57534e;
    stroke-opacity: 0.5;
}

/* Concept links - visible in both modes */
.tc-kg-link-concept {
    stroke: #a855f7 !important; /* Bright purple */
    stroke-opacity: 0.7 !important;
}

.dark .tc-kg-link-concept {
    stroke: #c084fc !important; /* Even brighter purple for dark mode */
    stroke-opacity: 0.75 !important;
}

.tc-kg-node {
    cursor: pointer;
}

.tc-kg-node-circle {
    stroke: white;
    stroke-width: 2.5;
    transition: all 0.2s;
}

.dark .tc-kg-node-circle {
    stroke: #292524;
}

.tc-kg-node-evergreen {
    fill: var(--tc-kg-node-evergreen);
}

.tc-kg-node-growing {
    fill: var(--tc-kg-node-growing);
}

.tc-kg-node-seedling {
    fill: var(--tc-kg-node-seedling);
}

.tc-kg-node-post {
    fill: var(--tc-kg-node-post);
}

.tc-kg-node-tag {
    fill: #9c27b0;
    opacity: 0.7;
}

.tc-kg-node-category {
    fill: #f44336;
    opacity: 0.7;
}

.tc-kg-node-reason {
    fill: #ff9800;
    opacity: 0.7;
}

.tc-kg-node-concept {
    opacity: 0.8;
    stroke: #fff;
    stroke-width: 2px;
}

/* Different colors for concept types */
.tc-kg-node-concept[data-concept-type="theme"] {
    fill: #9c27b0;
}

.tc-kg-node-concept[data-concept-type="framework"] {
    fill: #2196f3;
}

.tc-kg-node-concept[data-concept-type="methodology"] {
    fill: #4caf50;
}

.tc-kg-node-concept[data-concept-type="question"] {
    fill: #ff5722;
}

.tc-kg-node-label {
    font-size: 10px;
    fill: var(--tc-kg-text-secondary);
    pointer-events: none;
    text-anchor: middle;
    font-weight: 500;
    font-family: Georgia, serif;
}

.tc-kg-graph-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--tc-kg-bg-secondary);
    opacity: 0.97;
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 200;
}

.tc-kg-graph-overlay.active {
    display: flex;
}

.tc-kg-overlay-content {
    text-align: center;
    padding: 2rem;
}

.tc-kg-overlay-content h3 {
    font-size: 1.125rem;
    color: var(--tc-kg-text-primary);
    margin-bottom: 0.5rem;
}

.tc-kg-overlay-content p {
    color: var(--tc-kg-text-secondary);
    font-size: 0.875rem;
}

.tc-kg-loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: var(--tc-kg-text-secondary);
    z-index: 100;
}

.tc-kg-graph-controls {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    display: flex;
    gap: 0.5rem;
    z-index: 100;
}

.tc-kg-force-controls {
    display: flex;
    gap: 0.375rem;
    padding-left: 0.5rem;
    margin-left: 0.125rem;
    border-left: 1px solid var(--tc-kg-border-color);
}

.tc-kg-graph-btn {
    width: 32px;
    height: 32px;
    background: var(--tc-kg-bg-secondary);
    border: 1px solid var(--tc-kg-border-color);
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    font-weight: 600;
    color: var(--tc-kg-text-primary);
    transition: all 0.2s;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.tc-kg-graph-btn:hover {
    background: var(--tc-kg-text-primary);
    color: var(--tc-kg-bg-primary);
    border-color: var(--tc-kg-text-primary);
}

/* Fullscreen styles */
.tc-kg-graph-wrapper.tc-kg-fullscreen {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100vw;
    height: 100vh;
    max-width: none;
    margin: 0;
    padding: 0;
    z-index: 9999;
    background: var(--tc-kg-bg-primary);
}

.tc-kg-graph-wrapper.tc-kg-fullscreen .tc-kg-graph-container {
    height: 100vh;
    border-radius: 0;
    border: none;
    margin: 0;
}

.tc-kg-graph-wrapper.tc-kg-fullscreen .tc-kg-stats-legend {
    position: fixed;
    bottom: 1rem;
    left: 1rem;
    right: 1rem;
    z-index: 101;
    max-width: 600px;
}

.tc-kg-help-icon {
    position: absolute;
    bottom: 0.75rem;
    right: 0.75rem;
    width: 32px;
    height: 32px;
    background: var(--tc-kg-bg-secondary);
    border: 1px solid var(--tc-kg-border-color);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--tc-kg-text-primary);
    transition: all 0.2s;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    z-index: 100;
}

.tc-kg-help-icon:hover {
    background: var(--tc-kg-text-primary);
    color: var(--tc-kg-bg-primary);
    border-color: var(--tc-kg-text-primary);
}

.tc-kg-tooltip {
    position: fixed;
    padding: 0.875rem;
    background: var(--tc-kg-bg-secondary);
    color: var(--tc-kg-text-primary);
    border-radius: 8px;
    border: 1px solid var(--tc-kg-border-color);
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s;
    font-size: 0.8125rem;
    max-width: 280px;
    z-index: 1000;
}

.tc-kg-tooltip h3 {
    margin: 0 0 0.5rem 0;
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--tc-kg-text-primary);
    line-height: 1.3;
}

.tc-kg-tooltip-meta {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.625rem;
    padding-bottom: 0.625rem;
    border-bottom: 1px solid var(--tc-kg-border-color);
}

.tc-kg-tooltip-category {
    color: var(--tc-kg-text-secondary);
    font-size: 0.75rem;
}

.tc-kg-tooltip-connections {
    font-size: 0.75rem;
    color: var(--tc-kg-text-secondary);
    line-height: 1.4;
}

.tc-kg-tooltip-connections strong {
    color: var(--tc-kg-text-primary);
    display: block;
    margin-bottom: 0.25rem;
}

.tc-kg-tooltip-hint {
    margin-top: 0.625rem;
    padding-top: 0.625rem;
    border-top: 1px solid var(--tc-kg-border-color);
    font-size: 0.6875rem;
    color: var(--tc-kg-text-tertiary);
    font-style: italic;
}

.tc-kg-connection-detail {
    margin-top: 0.25rem;
    font-size: 0.6875rem;
    color: var(--tc-kg-text-secondary);
    display: flex;
    align-items: flex-start;
    gap: 0.375rem;
    line-height: 1.4;
}

.tc-kg-post-link {
    margin-top: 0.375rem;
    font-size: 0.8125rem;
    line-height: 1.5;
}

.tc-kg-post-link a {
    color: var(--tc-kg-text-primary);
    text-decoration: none;
    display: block;
    padding: 0.25rem 0;
    transition: all 0.15s;
    border-radius: 3px;
}

.tc-kg-post-link a:hover {
    color: #a855f7;
    padding-left: 0.25rem;
}

.dark .tc-kg-post-link a:hover,
[data-theme="dark"] .tc-kg-post-link a:hover {
    color: #c084fc;
}

.tc-kg-stage-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.125rem 0.5rem;
    border-radius: 4px;
    font-size: 0.6875rem;
    font-weight: 500;
}

.tc-kg-badge-seedling {
    background: #e8f5e9;
    color: #2e7d32;
}

.tc-kg-badge-growing {
    background: #fff9e6;
    color: #e65100;
}

.tc-kg-badge-evergreen {
    background: #e0f2f1;
    color: #00695c;
}

.tc-kg-badge-post {
    background: #f0f0f0;
    color: #666666;
}

.tc-kg-badge-tag {
    background: #f3e5f5;
    color: #7b1fa2;
}

.tc-kg-badge-category {
    background: #ffebee;
    color: #c62828;
}

.tc-kg-badge-reason {
    background: #fff3e0;
    color: #e65100;
}

.tc-kg-badge-concept {
    background: #f3e5f5;
    color: #7b1fa2;
}

.dark .tc-kg-badge-seedling,
[data-theme="dark"] .tc-kg-badge-seedling {
    background: rgba(66, 165, 245, 0.15);
    color: #42a5f5;
}

.dark .tc-kg-badge-growing,
[data-theme="dark"] .tc-kg-badge-growing {
    background: rgba(255, 183, 77, 0.15);
    color: #ffb74d;
}

.dark .tc-kg-badge-evergreen,
[data-theme="dark"] .tc-kg-badge-evergreen {
    background: rgba(77, 208, 225, 0.15);
    color: #4dd0e1;
}

.dark .tc-kg-badge-post,
[data-theme="dark"] .tc-kg-badge-post {
    background: rgba(189, 189, 189, 0.15);
    color: #bdbdbd;
}

.dark .tc-kg-badge-tag,
[data-theme="dark"] .tc-kg-badge-tag {
    background: rgba(156, 39, 176, 0.15);
    color: #ce93d8;
}

.dark .tc-kg-badge-category,
[data-theme="dark"] .tc-kg-badge-category {
    background: rgba(244, 67, 54, 0.15);
    color: #ef5350;
}

.dark .tc-kg-badge-reason,
[data-theme="dark"] .tc-kg-badge-reason {
    background: rgba(255, 152, 0, 0.15);
    color: #ffb74d;
}

.dark .tc-kg-badge-concept,
[data-theme="dark"] .tc-kg-badge-concept {
    background: rgba(156, 39, 176, 0.15);
    color: #ce93d8;
}

.tc-kg-controls-bar {
    background: var(--tc-kg-bg-secondary);
    border: 1px solid var(--tc-kg-border-color);
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 1.5rem;
}

.tc-kg-controls-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.tc-kg-controls-title {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--tc-kg-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.tc-kg-expand-toggle {
    background: none;
    border: none;
    color: var(--tc-kg-text-secondary);
    cursor: pointer;
    font-size: 0.875rem;
    padding: 0.25rem 0.5rem;
    font-family: Georgia, serif;
}

.tc-kg-expand-toggle:hover {
    color: var(--tc-kg-text-primary);
}

.tc-kg-controls-content {
    display: grid;
    gap: 1rem;
}

.tc-kg-control-row {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    align-items: center;
}

.tc-kg-filter-btn {
    padding: 0.375rem 0.875rem;
    border: 1px solid var(--tc-kg-border-color);
    background: var(--tc-kg-bg-primary);
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--tc-kg-text-primary);
    font-family: Georgia, serif;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.tc-kg-filter-btn:hover {
    background: var(--tc-kg-bg-tertiary);
    border-color: var(--tc-kg-text-tertiary);
}

.tc-kg-filter-btn.active {
    background: var(--tc-kg-text-primary);
    color: var(--tc-kg-bg-primary);
    border-color: var(--tc-kg-text-primary);
}

.tc-kg-search-input {
    flex: 1;
    min-width: 200px;
    padding: 0.5rem 0.875rem;
    border: 1px solid var(--tc-kg-border-color);
    border-radius: 6px;
    font-size: 0.8125rem;
    font-family: Georgia, serif;
    color: var(--tc-kg-text-primary);
    background: var(--tc-kg-bg-primary);
}

.tc-kg-search-input:focus {
    outline: none;
    border-color: var(--tc-kg-text-secondary);
}

.tc-kg-search-input::placeholder {
    color: var(--tc-kg-text-tertiary);
}

.tc-kg-intermediate-select {
    flex: 1;
    min-width: 200px;
    padding: 0.5rem 0.875rem;
    border: 1px solid var(--tc-kg-border-color);
    border-radius: 6px;
    font-size: 0.8125rem;
    font-family: Georgia, serif;
    color: var(--tc-kg-text-primary);
    background: var(--tc-kg-bg-primary);
    cursor: pointer;
}

.tc-kg-intermediate-select:focus {
    outline: none;
    border-color: var(--tc-kg-text-secondary);
}

.tc-kg-intermediate-label {
    font-size: 0.8125rem;
    color: var(--tc-kg-text-secondary);
    font-weight: 500;
    white-space: nowrap;
}

.tc-kg-stats-legend {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
    font-size: 0.8125rem;
    color: var(--tc-kg-text-secondary);
    padding: 0.875rem 1rem;
    background: var(--tc-kg-bg-secondary);
    border: 1px solid var(--tc-kg-border-color);
    border-radius: 8px;
}

.tc-kg-stats {
    display: flex;
    gap: 1.25rem;
    flex-wrap: wrap;
}

.tc-kg-stat-item {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    white-space: nowrap;
}

.tc-kg-stat-value {
    font-weight: 600;
    color: var(--tc-kg-text-primary);
}

.tc-kg-legend {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.tc-kg-legend-item {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    white-space: nowrap;
}

.tc-kg-legend-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: 2px solid var(--tc-kg-bg-secondary);
    flex-shrink: 0;
}

@media (max-width: 768px) {
    .tc-kg-graph-wrapper {
        margin-top: 1rem;
    }
    
    .tc-kg-graph-container {
        height: 400px;
    }
    
    .tc-kg-control-row {
        flex-direction: column;
        align-items: stretch;
    }
    
    .tc-kg-search-input {
        width: 100%;
        min-width: 0;
    }
    
    .tc-kg-stats-legend {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .tc-kg-stats, .tc-kg-legend {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .tc-kg-graph-controls {
        flex-direction: column;
    }
    
    .tc-kg-node-label {
        font-size: 9px;
    }
    
    .tc-kg-tooltip {
        max-width: 240px;
        font-size: 0.75rem;
    }
}

@media (min-width: 769px) {
    .tc-kg-graph-container {
        height: 600px;
    }
}

@media (min-width: 1024px) {
    .tc-kg-graph-wrapper {
        padding: 0 2rem 3rem 2rem;
        margin-top: 2.5rem;
    }
    
    .tc-kg-graph-container {
        height: 700px;
    }
}