#posthog

Create a custom PostHog-style funnel chart. Requirements: 1. Multi-step funnel (e.g., Landed -> Signed Up -> Paid). 2. Percentage drop-off calculations for each step. 3. Hover effects showing exact visitor counts. 4. Toggle to filter by cohort (e.g., 'Internal', 'External'). 5. Responsive SVG implementation using D3.js or Tremor.