:root {
            /* Light theme (default) */
            --bg-primary: #f6f8fa;
            --bg-secondary: #ffffff;
            --bg-tertiary: #eef1f4;
            --border: #d0d7de;
            --text-primary: #1f2328;
            --text-secondary: #59636e;
            --text-muted: #818b98;
            --accent: #0969da;
            --accent-hover: #218bff;
            --success: #1a7f37;
            --warning: #9a6700;
            --danger: #cf222e;
            --purple: #8250df;
            --pink: #bf3989;
            --chart-grid: #d8dee4;
            --chart-tick: #59636e;
            --card-shadow: 0 1px 0 rgba(31,35,40,0.04);
        }

        [data-theme="dark"] {
            --bg-primary: #0d1117;
            --bg-secondary: #161b22;
            --bg-tertiary: #21262d;
            --border: #30363d;
            --text-primary: #e6edf3;
            --text-secondary: #8b949e;
            --text-muted: #6e7681;
            --accent: #58a6ff;
            --accent-hover: #79b8ff;
            --success: #3fb950;
            --warning: #d29922;
            --danger: #f85149;
            --purple: #a371f7;
            --pink: #db61a2;
            --chart-grid: #30363d;
            --chart-tick: #8b949e;
            --card-shadow: none;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            background: var(--bg-primary);
            color: var(--text-primary);
            min-height: 100vh;
        }

        /* Header */
        .header {
            background: var(--bg-secondary);
            border-bottom: 1px solid var(--border);
            padding: 16px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            position: sticky;
            top: 0;
            z-index: 100;
        }

        .header h1 {
            font-size: 20px;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .header h1 .cube {
            width: 28px;
            height: 28px;
            background: linear-gradient(135deg, var(--accent), var(--purple));
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
        }

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

        .auth-form {
            display: flex;
            gap: 8px;
            align-items: center;
        }

        .auth-form input {
            padding: 8px 12px;
            background: var(--bg-tertiary);
            border: 1px solid var(--border);
            border-radius: 6px;
            color: var(--text-primary);
            font-size: 14px;
            width: 180px;
        }

        .auth-form input:focus {
            outline: none;
            border-color: var(--accent);
        }
        .auth-form input:focus-visible {
            box-shadow: 0 0 0 2px rgba(88, 166, 255, 0.4);
        }

        .btn {
            padding: 8px 16px;
            border-radius: 6px;
            border: 1px solid var(--border);
            background: var(--bg-tertiary);
            color: var(--text-primary);
            font-size: 14px;
            cursor: pointer;
            transition: all 0.2s;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .btn:hover {
            background: var(--border);
        }

        .btn-primary {
            background: var(--accent);
            border-color: var(--accent);
            color: #000;
        }

        .btn-primary:hover {
            background: var(--accent-hover);
        }

        .btn-sm {
            padding: 4px 8px;
            font-size: 12px;
        }

        /* Global filter bar (Scope) */
        .filter-bar {
            background: var(--bg-secondary);
            border-bottom: 1px solid var(--border);
            padding: 8px 24px;
            display: flex;
            gap: 8px;
            align-items: center;
            flex-wrap: wrap;
            font-size: 12px;
            position: sticky;
            top: 0;
            z-index: 99;
        }
        .filter-bar .filter-label {
            font-weight: 600;
            color: var(--text-secondary);
            text-transform: uppercase;
            font-size: 11px;
            letter-spacing: 0.04em;
        }
        .filter-bar .filter-input {
            padding: 6px 10px;
            background: var(--bg-tertiary);
            border: 1px solid var(--border);
            border-radius: 4px;
            color: var(--text-primary);
            font-size: 12px;
            min-width: 0;
            width: 130px;
        }
        .filter-bar .filter-input.filter-date { width: 145px; }
        .filter-bar .filter-input:focus { outline: none; border-color: var(--accent); }
        .filter-bar .filter-input.filter-active {
            border-color: var(--accent);
            box-shadow: 0 0 0 2px rgba(88,166,255,0.2);
        }
        .filter-status {
            font-size: 11px;
            color: var(--text-muted);
            margin-left: auto;
        }
        .filter-status.has-filter { color: var(--accent); font-weight: 600; }

        /* Navigation Tabs */
        .nav-tabs {
            display: flex;
            background: var(--bg-secondary);
            border-bottom: 1px solid var(--border);
            padding: 0 24px;
            gap: 4px;
            overflow-x: auto;
            overflow-y: hidden;
            scrollbar-width: thin;
            scrollbar-color: var(--border) transparent;
            -webkit-overflow-scrolling: touch;
        }
        .nav-tabs::-webkit-scrollbar { height: 6px; }
        .nav-tabs::-webkit-scrollbar-track { background: transparent; }
        .nav-tabs::-webkit-scrollbar-thumb {
            background: var(--border);
            border-radius: 3px;
        }
        .nav-tabs::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

        .nav-tab {
            padding: 12px 16px;
            color: var(--text-secondary);
            text-decoration: none;
            border-bottom: 2px solid transparent;
            transition: all 0.2s;
            cursor: pointer;
            font-size: 14px;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .nav-tab:hover {
            color: var(--text-primary);
        }

        .nav-tab.active {
            color: var(--text-primary);
            border-bottom-color: var(--accent);
        }

        /* Main Content */
        .main {
            padding: 24px;
            max-width: 1800px;
            margin: 0 auto;
        }

        .section {
            display: none;
        }

        .section.active {
            display: block;
        }

        /* Cards */
        .card {
            background: var(--bg-secondary);
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 20px;
            margin-bottom: 20px;
            box-shadow: var(--card-shadow);
        }

        .card-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 16px;
        }

        .card-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
        }

        .card-subtitle {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* Stats Grid */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 16px;
            margin-bottom: 24px;
        }

        .stat-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 20px;
        }

        .stat-label {
            font-size: 12px;
            color: var(--text-secondary);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 8px;
        }

        .stat-value {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-primary);
        }

        .stat-change {
            font-size: 12px;
            margin-top: 4px;
        }

        .stat-change.positive { color: var(--success); }
        .stat-change.negative { color: var(--danger); }

        /* Charts */
        .chart-container {
            position: relative;
            height: 300px;
        }

        .chart-container-lg {
            height: 400px;
        }

        .charts-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
            gap: 20px;
        }

        /* Tables */
        .table-container {
            overflow-x: auto;
            max-height: 600px;
            overflow-y: auto;
        }

        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 13px;
        }

        th, td {
            padding: 10px 12px;
            text-align: left;
            border-bottom: 1px solid var(--border);
        }

        th {
            background: var(--bg-tertiary);
            font-weight: 600;
            position: sticky;
            top: 0;
            z-index: 10;
        }

        tr:hover {
            background: var(--bg-tertiary);
        }

        .data-cell {
            max-width: 400px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            font-family: 'Monaco', 'Menlo', monospace;
            font-size: 12px;
            color: var(--text-secondary);
        }

        .data-cell.expanded {
            white-space: pre-wrap;
            word-break: break-all;
        }

        .event-tag {
            display: inline-block;
            padding: 2px 8px;
            background: var(--bg-tertiary);
            border-radius: 12px;
            font-size: 12px;
            font-weight: 500;
        }

        /* Filters */
        .filters {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 20px;
            padding: 16px;
            background: var(--bg-tertiary);
            border-radius: 8px;
        }

        .filter-group {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .filter-label {
            font-size: 11px;
            color: var(--text-muted);
            text-transform: uppercase;
        }

        .filter-input {
            padding: 8px 12px;
            background: var(--bg-secondary);
            border: 1px solid var(--border);
            border-radius: 6px;
            color: var(--text-primary);
            font-size: 13px;
            min-width: 150px;
        }

        .filter-input:focus {
            outline: none;
            border-color: var(--accent);
        }
        .filter-input:focus-visible {
            box-shadow: 0 0 0 2px rgba(88, 166, 255, 0.4);
        }
        .btn:focus-visible, .modal-close:focus-visible, .copy-btn:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        select.filter-input {
            cursor: pointer;
        }

        /* Property Explorer */
        .property-tree {
            font-family: 'Monaco', 'Menlo', monospace;
            font-size: 13px;
        }

        .property-item {
            padding: 8px 12px;
            border-bottom: 1px solid var(--border);
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            transition: background 0.2s;
        }

        .property-item:hover {
            background: var(--bg-tertiary);
        }

        .property-name {
            color: var(--accent);
        }

        .property-type {
            font-size: 11px;
            padding: 2px 6px;
            border-radius: 4px;
            background: var(--bg-tertiary);
            color: var(--text-secondary);
        }

        .property-type.integer, .property-type.float {
            background: rgba(63, 185, 80, 0.2);
            color: var(--success);
        }

        .property-type.string {
            background: rgba(88, 166, 255, 0.2);
            color: var(--accent);
        }

        .property-type.boolean {
            background: rgba(219, 97, 162, 0.2);
            color: var(--pink);
        }

        /* Schema-drift indicator: properties seen on the wire that aren't
           declared in any schema/*.json file. They still work (stored in the
           residual JSON blob, queryable by dot-path) but aren't indexed. */
        .property-item.drift {
            border-left: 3px solid #f0c674;
            background: rgba(240, 198, 116, 0.06);
        }

        .property-badge {
            font-size: 10px;
            padding: 2px 6px;
            border-radius: 4px;
            margin-left: 8px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .property-badge.lifted {
            background: rgba(63, 185, 80, 0.15);
            color: var(--success);
        }

        .property-badge.drift {
            background: rgba(240, 198, 116, 0.2);
            color: #f0c674;
        }

        /* Session Timeline */
        .session-timeline {
            position: relative;
            padding-left: 30px;
        }

        .session-timeline::before {
            content: '';
            position: absolute;
            left: 8px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: var(--border);
        }

        .timeline-event {
            position: relative;
            padding: 12px 16px;
            background: var(--bg-tertiary);
            border-radius: 6px;
            margin-bottom: 12px;
        }

        .timeline-event::before {
            content: '';
            position: absolute;
            left: -26px;
            top: 16px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--accent);
            border: 2px solid var(--bg-secondary);
        }

        .timeline-time {
            font-size: 11px;
            color: var(--text-muted);
            margin-bottom: 4px;
        }

        .timeline-name {
            font-weight: 600;
            margin-bottom: 4px;
        }

        .timeline-data {
            font-size: 12px;
            color: var(--text-secondary);
            font-family: monospace;
        }

        /* Funnel */
        .funnel-container {
            display: flex;
            flex-direction: column;
            gap: 8px;
            max-width: 600px;
        }

        .funnel-step {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .funnel-bar {
            height: 40px;
            background: linear-gradient(90deg, var(--accent), var(--purple));
            border-radius: 4px;
            display: flex;
            align-items: center;
            padding: 0 16px;
            color: #000;
            font-weight: 600;
            font-size: 13px;
            min-width: 100px;
            transition: width 0.5s ease;
        }

        .funnel-info {
            display: flex;
            flex-direction: column;
            min-width: 150px;
        }

        .funnel-name {
            font-weight: 500;
        }

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

        .funnel-drop {
            font-size: 11px;
            color: var(--danger);
            margin-left: auto;
        }

        /* Funnel Builder */
        .funnel-builder {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            padding: 16px;
            background: var(--bg-tertiary);
            border-radius: 8px;
            margin-bottom: 20px;
            min-height: 60px;
            align-items: center;
        }

        .funnel-step-tag {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 6px 12px;
            background: var(--bg-secondary);
            border: 1px solid var(--border);
            border-radius: 6px;
            font-size: 13px;
        }

        .funnel-step-tag .remove {
            cursor: pointer;
            color: var(--text-muted);
            font-size: 16px;
            line-height: 1;
        }

        .funnel-step-tag .remove:hover {
            color: var(--danger);
        }

        .funnel-arrow {
            color: var(--text-muted);
            font-size: 18px;
        }

        /* Loading & Empty States */
        .loading {
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 60px;
            color: var(--text-secondary);
        }

        .spinner {
            width: 24px;
            height: 24px;
            border: 2px solid var(--border);
            border-top-color: var(--accent);
            border-radius: 50%;
            animation: spin 1s linear infinite;
            margin-right: 12px;
        }

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

        .empty-state {
            text-align: center;
            padding: 60px 20px;
            color: var(--text-secondary);
        }

        .empty-state h3 {
            font-size: 18px;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        /* Badges */
        .badge {
            display: inline-block;
            padding: 2px 8px;
            border-radius: 10px;
            font-size: 11px;
            font-weight: 500;
        }

        .badge-success { background: rgba(63, 185, 80, 0.2); color: var(--success); }
        .badge-warning { background: rgba(210, 153, 34, 0.2); color: var(--warning); }
        .badge-danger { background: rgba(248, 81, 73, 0.2); color: var(--danger); }
        .badge-info { background: rgba(88, 166, 255, 0.2); color: var(--accent); }

        /* Modal */
        .modal-overlay {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.7);
            display: none;
            justify-content: center;
            align-items: center;
            z-index: 1000;
        }

        .modal-overlay.active {
            display: flex;
        }

        .modal {
            background: var(--bg-secondary);
            border: 1px solid var(--border);
            border-radius: 12px;
            max-width: 800px;
            max-height: 80vh;
            width: 90%;
            overflow: hidden;
        }

        .modal-header {
            padding: 16px 20px;
            border-bottom: 1px solid var(--border);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .modal-title {
            font-size: 16px;
            font-weight: 600;
        }

        .modal-close {
            cursor: pointer;
            font-size: 24px;
            color: var(--text-secondary);
            line-height: 1;
            background: transparent;
            border: none;
            padding: 0 6px;
            font-family: inherit;
        }

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

        .modal-body {
            padding: 20px;
            overflow-y: auto;
            max-height: calc(80vh - 60px);
        }

        /* Event Detail Viewer */
        .json-viewer {
            font-family: 'Monaco', 'Menlo', monospace;
            font-size: 13px;
            line-height: 1.5;
        }

        .json-key { color: var(--accent); }
        .json-string { color: var(--success); }
        .json-number { color: var(--warning); }
        .json-boolean { color: var(--pink); }
        .json-null { color: var(--text-muted); }

        /* Structured property sections */
        .prop-section { margin-bottom: 20px; }
        .prop-section-title {
            font-size: 10px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--text-muted);
            margin-bottom: 6px;
            padding-bottom: 4px;
            border-bottom: 1px solid var(--border);
        }
        /* Event-specific fields: the thing the analyst usually wants first. */
        .prop-section-event {
            background: rgba(63, 185, 80, 0.05);
            border-left: 3px solid var(--success);
            padding: 10px 12px;
            border-radius: 4px;
        }
        .prop-section-event .prop-section-title {
            color: var(--success);
            border-bottom-color: rgba(63, 185, 80, 0.3);
        }
        /* Drift: keys we didn't expect — surfaces schema gaps. */
        .prop-section-drift {
            background: rgba(240, 198, 116, 0.06);
            border-left: 3px solid #f0c674;
            padding: 10px 12px;
            border-radius: 4px;
        }
        .prop-section-drift .prop-section-title {
            color: #f0c674;
            border-bottom-color: rgba(240, 198, 116, 0.3);
        }
        .prop-table { width: 100%; border-collapse: collapse; }
        .prop-key {
            color: var(--accent);
            padding: 4px 12px 4px 0;
            vertical-align: top;
            white-space: nowrap;
            font-weight: 500;
            width: 38%;
        }
        .prop-val {
            padding: 4px 0;
            color: var(--text);
            word-break: break-all;
        }
        .stack-trace {
            font-size: 11px;
            background: var(--bg-tertiary, var(--bg-secondary));
            padding: 10px;
            border-radius: 4px;
            overflow-x: auto;
            white-space: pre-wrap;
            word-break: break-word;
            max-height: 240px;
            overflow-y: auto;
            margin-top: 4px;
        }

        /* Refresh indicator */
        .refresh-indicator {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 12px;
            color: var(--text-muted);
        }

        .auto-refresh-toggle {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        /* Toggle Switch */
        .toggle {
            position: relative;
            width: 36px;
            height: 20px;
            background: var(--bg-tertiary);
            border-radius: 10px;
            cursor: pointer;
            transition: background 0.2s;
        }
        .toggle:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        .toggle.active {
            background: var(--accent);
        }

        .toggle::after {
            content: '';
            position: absolute;
            width: 16px;
            height: 16px;
            background: white;
            border-radius: 50%;
            top: 2px;
            left: 2px;
            transition: transform 0.2s;
        }

        .toggle.active::after {
            transform: translateX(16px);
        }

        /* Clickable rows */
        .clickable {
            cursor: pointer;
        }

        .id-link {
            cursor: pointer;
            color: var(--accent);
            text-decoration: none;
            font-family: 'Monaco', 'Menlo', monospace;
            font-size: 12px;
        }
        .id-link:hover { text-decoration: underline; }
        .id-chip {
            font-family: 'Monaco', 'Menlo', monospace;
            font-size: 12px;
            color: var(--text-primary);
        }
        .copy-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            margin-left: 4px;
            padding: 0 4px;
            min-width: 18px;
            height: 16px;
            font-size: 11px;
            line-height: 1;
            color: var(--text-muted);
            background: transparent;
            border: 1px solid var(--border);
            border-radius: 3px;
            cursor: pointer;
            vertical-align: middle;
            transition: color 120ms ease, border-color 120ms ease;
        }
        .copy-btn:hover { color: var(--accent); border-color: var(--accent); }
        .copy-btn.copied { color: var(--success, #3fb950); border-color: var(--success, #3fb950); }

        /* Toast notifications */
        #toastContainer {
            position: fixed;
            bottom: 20px;
            right: 20px;
            z-index: 9999;
            display: flex;
            flex-direction: column;
            gap: 8px;
            pointer-events: none;
        }
        .toast {
            background: var(--bg-tertiary);
            color: var(--text-primary);
            border: 1px solid var(--border);
            padding: 10px 14px;
            border-radius: 6px;
            font-size: 13px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.25);
            opacity: 0;
            transform: translateY(8px);
            transition: opacity 180ms ease, transform 180ms ease;
            max-width: 360px;
            pointer-events: auto;
        }
        .toast.show { opacity: 1; transform: translateY(0); }
        .toast.success { border-color: #3fb950; }
        .toast.danger  { border-color: #f85149; }
        .toast.warning { border-color: #d29922; }

        /* Sortable table headers */
        th.sortable { cursor: pointer; user-select: none; }
        th.sortable:hover { color: var(--accent); }
        th.sortable::after { content: ' '; opacity: 0.4; margin-left: 4px; font-size: 10px; }
        th.sortable.sort-asc::after  { content: ' ▲'; opacity: 1; }
        th.sortable.sort-desc::after { content: ' ▼'; opacity: 1; }

        /* Responsive */
        @media (max-width: 768px) {
            .charts-grid {
                grid-template-columns: 1fr;
            }

            .filters {
                flex-direction: column;
            }

            .header {
                flex-direction: column;
                gap: 12px;
            }
        }

        /* Property Graph Controls */
        .graph-controls {
            display: flex;
            gap: 12px;
            align-items: flex-end;
            flex-wrap: wrap;
            margin-bottom: 20px;
            padding: 16px;
            background: var(--bg-tertiary);
            border-radius: 8px;
        }

        /* Heatmap colors for event frequency */
        .heatmap-cell {
            padding: 4px 8px;
            border-radius: 4px;
            font-size: 12px;
            text-align: center;
        }

        .heat-0 { background: rgba(88, 166, 255, 0.1); }
        .heat-1 { background: rgba(88, 166, 255, 0.2); }
        .heat-2 { background: rgba(88, 166, 255, 0.3); }
        .heat-3 { background: rgba(88, 166, 255, 0.4); }
        .heat-4 { background: rgba(88, 166, 255, 0.5); }
        .heat-5 { background: rgba(88, 166, 255, 0.6); color: #000; }

        /* --- Dashboard 2.0 --- */

        /* Level World grid */
        .level-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(56px, 1fr));
            gap: 6px;
        }

        .level-cell {
            aspect-ratio: 1 / 1;
            border-radius: 6px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            font-size: 11px;
            font-weight: 600;
            color: var(--text-primary);
            border: 1px solid rgba(255,255,255,0.06);
            position: relative;
            transition: transform 0.1s ease, box-shadow 0.1s ease;
            overflow: hidden;
        }

        .level-cell:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(0,0,0,0.4);
            border-color: var(--accent);
        }

        .level-cell .num {
            font-size: 14px;
            font-weight: 700;
            line-height: 1;
        }

        .level-cell .sub {
            font-size: 9px;
            color: rgba(255,255,255,0.75);
            margin-top: 2px;
        }

        .level-cell.empty {
            background: var(--bg-tertiary);
            color: var(--text-muted);
            opacity: 0.4;
        }

        .level-mode-selector {
            display: flex;
            gap: 4px;
            background: var(--bg-tertiary);
            padding: 4px;
            border-radius: 6px;
            flex-wrap: wrap;
        }

        .level-mode-btn {
            padding: 6px 12px;
            border-radius: 4px;
            cursor: pointer;
            font-size: 12px;
            color: var(--text-secondary);
            background: transparent;
            border: none;
            transition: all 0.2s;
        }

        .level-mode-btn.active {
            background: var(--bg-secondary);
            color: var(--text-primary);
        }

        .level-legend {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 12px;
            color: var(--text-secondary);
            margin-top: 12px;
        }

        .legend-gradient {
            flex: 1;
            max-width: 300px;
            height: 12px;
            border-radius: 6px;
        }

        /* Segment cards */
        .segment-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 12px;
        }

        .segment-card {
            padding: 16px;
            border-radius: 8px;
            background: var(--bg-tertiary);
            border-left: 3px solid var(--accent);
        }

        .segment-card.tutorial_dropout { border-left-color: var(--danger); }
        .segment-card.early_dropout { border-left-color: var(--warning); }
        .segment-card.mid_game { border-left-color: var(--accent); }
        .segment-card.late_game { border-left-color: var(--purple); }
        .segment-card.endgame { border-left-color: #d29922; }
        .segment-card.finisher { border-left-color: var(--success); }
        .segment-card.returning { border-left-color: var(--success); }
        .segment-card.active { border-left-color: var(--success); }
        .segment-card.churned { border-left-color: var(--danger); }

        .segment-card .seg-label {
            font-size: 11px;
            text-transform: uppercase;
            color: var(--text-muted);
            letter-spacing: 0.5px;
        }

        .segment-card .seg-value {
            font-size: 26px;
            font-weight: 700;
            margin-top: 4px;
        }

        .segment-card .seg-pct {
            font-size: 12px;
            color: var(--text-secondary);
            margin-top: 2px;
        }

        /* Insight cards */
        .insight-card {
            padding: 14px 18px;
            border-radius: 8px;
            border-left: 4px solid var(--accent);
            background: var(--bg-tertiary);
            margin-bottom: 10px;
        }

        .insight-card.warning { border-left-color: var(--warning); }
        .insight-card.danger { border-left-color: var(--danger); }
        .insight-card.info { border-left-color: var(--accent); }

        .insight-title {
            font-weight: 600;
            margin-bottom: 4px;
        }

        .insight-detail {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        /* Retention cohort table */
        .cohort-table {
            border-collapse: separate;
            border-spacing: 2px;
            width: 100%;
        }

        .cohort-table th, .cohort-table td {
            padding: 8px 6px;
            text-align: center;
            font-size: 12px;
            border: none;
            background: var(--bg-tertiary);
            min-width: 48px;
        }

        .cohort-cell {
            border-radius: 4px;
        }

        /* Stat card accents */
        .stat-card.accent-success { border-left: 3px solid var(--success); padding-left: 18px; }
        .stat-card.accent-warning { border-left: 3px solid var(--warning); padding-left: 18px; }
        .stat-card.accent-danger { border-left: 3px solid var(--danger); padding-left: 18px; }
        .stat-card.accent-accent { border-left: 3px solid var(--accent); padding-left: 18px; }

        .stat-sub {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 4px;
        }

        .two-col {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        @media (max-width: 900px) {
            .two-col { grid-template-columns: 1fr; }
        }

        .drop-chart-wrap { height: 360px; }

        /* Heatmap grid */
        .heatmap {
            display: grid;
            grid-template-columns: 48px repeat(24, minmax(24px, 1fr));
            gap: 2px;
            min-width: 700px;
        }
        .heatmap-label {
            font-size: 11px;
            color: var(--text-muted);
            padding: 4px;
            display: flex;
            align-items: center;
        }
        .heatmap-label.col {
            justify-content: center;
            font-variant-numeric: tabular-nums;
        }
        .heatmap-box {
            aspect-ratio: 1 / 1;
            border-radius: 3px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 10px;
            font-weight: 600;
            color: rgba(255,255,255,0.9);
            cursor: help;
        }

        /* User flow */
        .flow-sessions {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .flow-session {
            padding: 10px 12px;
            border-radius: 6px;
            background: var(--bg-tertiary);
            border-left: 3px solid var(--accent);
            font-size: 13px;
        }
        .flow-session.has-complete { border-left-color: var(--success); }
        .flow-session.no-activity { border-left-color: var(--text-muted); opacity: 0.7; }
        .flow-session-head {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .flow-session-head .flow-meta {
            font-size: 11px;
            color: var(--text-muted);
        }
        .flow-session-stats {
            display: flex;
            gap: 12px;
            margin-top: 6px;
            font-size: 12px;
            color: var(--text-secondary);
        }
        .flow-session-stats strong { color: var(--text-primary); }