Marketing Funnel (AARRR)

{
  "nodes": [
    { "id":"acq","type":"rect","label":"Acquisition","x":40,"y":120,"fill":"#dbeafe","stroke":"#2563eb" },
    { "id":"act","type":"rect","label":"Activation","x":240,"y":120,"fill":"#fef3c7","stroke":"#a16207" },
    { "id":"ret","type":"rect","label":"Retention","x":440,"y":120,"fill":"#ede9fe","stroke":"#6d28d9" },
    { "id":"ref","type":"rect","label":"Referral","x":640,"y":120,"fill":"#fce7f3","stroke":"#be185d" },
    { "id":"rev","type":"ellipse","label":"Revenue","x":840,"y":120,"fill":"#dcfce7","stroke":"#15803d" },
    { "id":"k1","type":"note","label":"CAC, CTR","x":40,"y":250,"fill":"#fef9c3" },
    { "id":"k2","type":"note","label":"D1 / D7","x":240,"y":250,"fill":"#fef9c3" },
    { "id":"k3","type":"note","label":"Churn / NPS","x":440,"y":250,"fill":"#fef9c3" },
    { "id":"k4","type":"note","label":"K-factor","x":640,"y":250,"fill":"#fef9c3" },
    { "id":"k5","type":"note","label":"ARPU / LTV","x":840,"y":250,"fill":"#fef9c3" }
  ],
  "edges": [
    { "id":"e1","source":"acq","target":"act" },
    { "id":"e2","source":"act","target":"ret" },
    { "id":"e3","source":"ret","target":"ref" },
    { "id":"e4","source":"ref","target":"rev" }
  ]
}