Style: User Behavior Analytics. Type: BI/Analytics. Keywords: Funnel visualization, user flow diagrams, conversion tracking, engagement metrics, user journey mapping, cohort analysis. Primary Colors: Funnel stage colors: high engagement (green), drop-off (red), conversion (blue), user flow arrows (grey). Secondary Colors: Stage completion colors (success), abandonment colors (warning), engagement levels (gradient), cohort colors. Effects & Animation: Funnel animation (fill-down), flow diagram animations (connection draw), conversion pulse, engagement bar fill. Best For: Conversion funnel analysis, user journey tracking, engagement analytics, cohort analysis, retention tracking. Do Not Use For: Real-time operational metrics, technical system monitoring, financial transactions. Light Mode: ✓ Full. Dark Mode: ✓ Full. Performance: ⚡ Good. Accessibility: ✓ WCAG AA. Mobile-Friendly: ✓ Good. Conversion-Focused: ✗ Not applicable. Framework Compatibility: Recharts 9/10, Chart.js 9/10, D3.js 10/10. Era/Origin: 2020s Modern. Complexity: Medium. AI Prompt Keywords: Design a user behavior analytics dashboard. Use: funnel visualization, user flow diagrams (Sankey), conversion metrics, engagement heatmaps, cohort tables, retention curves, session replay indicators.. CSS/Technical: SVG funnel with gradients, Sankey diagram library, percentage labels, cohort grid cells, retention chart (line/area), click heatmap overlay, session timeline. Implementation Checklist: ☐ Funnel stages clear, ☐ Flow diagram readable, ☐ Conversions calculated, ☐ Cohorts comparable, ☐ Retention trends visible, ☐ Privacy compliant. Design System Variables: --funnel-width: 100%, --stage-colors: gradient, --flow-opacity: 0.6, --cohort-cell-size: 40px, --retention-line-color: #3B82F6, --engagement-scale: 5 levels.