/* ═══════════════════════════════════════════════════════════════════════════
   GNN TAB STYLES - DARK LUXE EDITION
   Green accent theme (#10b981) - Graph-inspired visuals
   ═══════════════════════════════════════════════════════════════════════════ */

/* GNN-specific accent color override */
#gnn-panel {
    --accent: var(--accent-gnn);
    --accent-glow: var(--accent-gnn-glow);
    --accent-soft: var(--accent-gnn-soft);
}

/* ==================== Main Layout ==================== */

.gnn-main {
    display: grid;
    grid-template-columns: 280px 1fr 280px;
    gap: 16px;
    padding: 16px;
    height: calc(100vh - var(--header-height) - var(--controls-height) - 32px);
    min-height: 500px;
}

/* ==================== Controls Bar ==================== */

.gnn-controls {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
}

/* ==================== Left Sidebar - Graph Structure ==================== */

.gnn-sidebar {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
}

.gnn-graph-container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px;
    min-height: 260px;
    background: var(--bg-void);
}

#gnn-graph-canvas {
    background: transparent;
    border-radius: var(--radius-md);
    cursor: default;
    box-shadow: 0 0 40px var(--accent-glow);
}

.gnn-graph-info {
    display: flex;
    justify-content: center;
    gap: 20px;
    padding: 12px 14px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    border-top: 1px solid var(--border-subtle);
    background: var(--bg-surface);
}

.gnn-graph-info strong {
    color: var(--accent);
    font-weight: 600;
    font-family: var(--font-mono);
}

/* Legend */
.gnn-legend {
    padding: 14px;
    border-top: 1px solid var(--border-subtle);
    background: var(--bg-surface);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
    transition: all 0.2s ease;
}

.legend-item:last-child {
    margin-bottom: 0;
}

.legend-item:hover {
    color: var(--text-primary);
}

.legend-dot {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    transition: all 0.2s ease;
}

.legend-item:hover .legend-dot {
    transform: scale(1.2);
}

.legend-dot--class-a {
    background: #60a5fa;
    box-shadow: 0 0 10px rgba(96, 165, 250, 0.5);
}

.legend-dot--class-b {
    background: #f87171;
    box-shadow: 0 0 10px rgba(248, 113, 113, 0.5);
}

/* ==================== Center - Visualizations ==================== */

.gnn-visualization {
    display: flex;
    flex-direction: column;
    gap: 16px;
    min-width: 0;
}

.gnn-message-panel {
    flex: 1.5;
    display: flex;
    flex-direction: column;
    min-height: 300px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.gnn-embedding-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 200px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.viz-panel__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    border-bottom: 1px solid var(--border-subtle);
    background: linear-gradient(135deg, var(--bg-elevated) 0%, var(--bg-card) 100%);
}

.viz-panel__header h3 {
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    letter-spacing: -0.02em;
}

.viz-panel__badge {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: 4px 10px;
    background: var(--accent);
    color: #0a0d17;
    border-radius: var(--radius-md);
    box-shadow: 0 0 15px var(--accent-glow);
    font-weight: 700;
}

.viz-panel__content {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
    min-height: 0;
    background: var(--bg-void);
}

.viz-panel__content canvas {
    max-width: 100%;
    max-height: 100%;
    border-radius: var(--radius-md);
}

.viz-panel__footer {
    padding: 12px 16px;
    border-top: 1px solid var(--border-subtle);
    background: var(--bg-surface);
}

/* Animation Controls */
.gnn-animation-controls {
    display: flex;
    align-items: center;
    gap: 10px;
}

.gnn-animation-controls .btn--icon {
    width: 34px;
    height: 34px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    border-radius: var(--radius-md);
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.gnn-animation-controls .btn--icon:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: #0a0d17;
    box-shadow: 0 0 20px var(--accent-glow);
}

.gnn-layer-progress {
    flex: 1;
    margin-left: 10px;
}

.progress-track {
    height: 6px;
    background: var(--bg-void);
    border-radius: 3px;
    overflow: hidden;
    border: 1px solid var(--border-subtle);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), #34d399);
    border-radius: 3px;
    transition: width 0.1s ease;
    box-shadow: 0 0 10px var(--accent-glow);
}

/* ==================== Right Sidebar - Details ==================== */

.gnn-details {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
}

.gnn-node-info {
    padding: 6px 0;
}

.gnn-node-hint {
    color: var(--text-tertiary);
    font-size: 0.8rem;
    font-style: italic;
    text-align: center;
    padding: 24px 0;
    margin: 0;
}

.node-detail-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-subtle);
    transition: all 0.2s ease;
}

.node-detail-row:hover {
    background: var(--bg-elevated);
    margin: 0 -14px;
    padding: 10px 14px;
}

.node-detail-row:last-child {
    border-bottom: none;
}

.node-detail-row .label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.node-detail-row .value {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-primary);
    font-family: var(--font-mono);
}

.node-detail-row .value.correct {
    color: var(--color-success);
    text-shadow: 0 0 10px rgba(16, 185, 129, 0.5);
}

.node-detail-row .value.incorrect {
    color: var(--color-error);
    text-shadow: 0 0 10px rgba(239, 68, 68, 0.5);
}

/* Training Metrics */
.gnn-metrics {
    padding: 6px 0;
}

.metric-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-subtle);
    transition: all 0.2s ease;
}

.metric-row:hover {
    background: var(--bg-elevated);
    margin: 0 -14px;
    padding: 10px 14px;
}

.metric-row:last-child {
    border-bottom: none;
}

.metric-label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.metric-value {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--accent);
    font-family: var(--font-mono);
}

/* ==================== Sidebar Common Styles ==================== */

.gnn-sidebar .sidebar__header,
.gnn-details .sidebar__header {
    padding: 16px;
    border-bottom: 1px solid var(--border-subtle);
    background: linear-gradient(135deg, var(--bg-elevated) 0%, var(--bg-card) 100%);
}

.gnn-sidebar .sidebar__header h3,
.gnn-details .sidebar__header h3 {
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    letter-spacing: -0.02em;
}

.gnn-sidebar .sidebar__content,
.gnn-details .sidebar__content {
    padding: 14px 16px;
    flex: 1;
    overflow-y: auto;
}

/* ==================== Canvas Styling ==================== */

#gnn-message-canvas,
#gnn-embedding-canvas {
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
}

/* ==================== Animations ==================== */

@keyframes gnn-pulse {
    0%, 100% {
        opacity: 1;
        text-shadow: 0 0 10px var(--accent-glow);
    }
    50% {
        opacity: 0.7;
        text-shadow: 0 0 20px var(--accent-glow);
    }
}

@keyframes gnn-message-flow {
    0% { stroke-dashoffset: 20; }
    100% { stroke-dashoffset: 0; }
}

@keyframes gnn-node-glow {
    0%, 100% {
        box-shadow: 0 0 10px var(--accent-glow);
    }
    50% {
        box-shadow: 0 0 25px var(--accent-glow);
    }
}

.gnn-training .metric-value {
    animation: gnn-pulse 0.5s ease-in-out infinite;
}

/* ==================== Dark Theme Enhancements ==================== */

.gnn-main canvas {
    box-shadow: 0 0 30px rgba(0, 0, 0, 0.3);
}

/* Scrollbar styling */
.gnn-details .sidebar__content::-webkit-scrollbar,
.gnn-sidebar .sidebar__content::-webkit-scrollbar {
    width: 6px;
}

.gnn-details .sidebar__content::-webkit-scrollbar-track,
.gnn-sidebar .sidebar__content::-webkit-scrollbar-track {
    background: transparent;
}

.gnn-details .sidebar__content::-webkit-scrollbar-thumb,
.gnn-sidebar .sidebar__content::-webkit-scrollbar-thumb {
    background: var(--border-default);
    border-radius: 3px;
}

.gnn-details .sidebar__content::-webkit-scrollbar-thumb:hover,
.gnn-sidebar .sidebar__content::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}

/* ==================== Graph Node Styles ==================== */

.gnn-node {
    fill: var(--bg-elevated);
    stroke: var(--accent);
    stroke-width: 2px;
    transition: all 0.2s ease;
}

.gnn-node:hover {
    fill: var(--accent-soft);
    stroke-width: 3px;
    filter: drop-shadow(0 0 8px var(--accent-glow));
}

.gnn-node--selected {
    fill: var(--accent);
    stroke: white;
    filter: drop-shadow(0 0 12px var(--accent-glow));
}

.gnn-edge {
    stroke: var(--border-default);
    stroke-width: 1.5px;
    transition: all 0.2s ease;
}

.gnn-edge--active {
    stroke: var(--accent);
    stroke-width: 2.5px;
    filter: drop-shadow(0 0 4px var(--accent-glow));
}

.gnn-edge--message {
    stroke: var(--accent);
    stroke-dasharray: 8 4;
    animation: gnn-message-flow 0.5s linear infinite;
}

/* ==================== Message Passing Visualization ==================== */

.message-aggregation {
    padding: 14px;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    margin-top: 12px;
}

.message-aggregation__title {
    font-family: var(--font-display);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.message-aggregation__formula {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--accent);
    text-align: center;
    padding: 10px;
    background: var(--bg-void);
    border-radius: var(--radius-sm);
    border: 1px solid var(--accent-soft);
}

/* ==================== Embedding Space Visualization ==================== */

.embedding-controls {
    display: flex;
    gap: 12px;
    align-items: center;
}

.embedding-control {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.embedding-control label {
    font-size: 0.7rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.embedding-control select {
    padding: 6px 10px;
    font-size: 0.8rem;
    font-family: var(--font-mono);
    background: var(--bg-void);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.embedding-control select:hover {
    border-color: var(--accent-soft);
}

.embedding-control select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-glow);
}

/* ==================== Layer Selector ==================== */

.gnn-layer-selector {
    display: flex;
    align-items: center;
    gap: 10px;
}

.gnn-layer-selector label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.gnn-layer-selector select {
    padding: 6px 12px;
    font-size: 0.85rem;
    font-family: var(--font-mono);
    background: var(--bg-void);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.gnn-layer-selector select:hover {
    border-color: var(--accent-soft);
}

.gnn-layer-selector select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-glow);
}

/* ==================== Responsive ==================== */

@media (max-width: 1200px) {
    .gnn-main {
        grid-template-columns: 240px 1fr 240px;
        gap: 12px;
        padding: 12px;
    }
}

@media (max-width: 992px) {
    .gnn-main {
        grid-template-columns: 1fr;
        grid-template-rows: auto 1fr auto;
        height: auto;
    }

    .gnn-sidebar {
        max-height: 300px;
    }

    .gnn-visualization {
        min-height: 400px;
    }

    .gnn-details {
        max-height: 250px;
    }
}

@media (max-width: 768px) {
    .gnn-controls {
        flex-wrap: wrap;
        gap: 10px;
    }

    .gnn-graph-container {
        min-height: 200px;
    }

    .gnn-message-panel {
        min-height: 250px;
    }

    .gnn-embedding-panel {
        min-height: 150px;
    }
}

@media (max-width: 600px) {
    .gnn-main {
        padding: 10px;
        gap: 10px;
    }

    .gnn-controls {
        padding: 10px 12px;
    }

    .viz-panel__header {
        padding: 12px 14px;
    }

    .viz-panel__header h3 {
        font-size: 0.85rem;
    }
}