Generate a blog header illustration

**Header illustration — "Why Your Onboarding Flow Is Leaking Users"**

Style: flat vector, clean geometric shapes, subtle paper-grain texture. Palette: #3D5AFE indigo / #FF6B6B coral / #F4F1EA bone.

The scene is a metaphor, not a literal screenshot: a stylized funnel rendered as a series of stepped indigo platforms descending left-to-right. Small coral dot-figures travel down the steps, but at two of the gaps they're slipping off the edges and falling away — the "leak" made visual. A single figure makes it all the way to a glowing coral checkpoint at the bottom-right, suggesting the few who convert.

Composition leaves the entire left third as flat bone-colored space — clean room for the post title overlay — with all the action weighted to the right two-thirds. 16:9 aspect, balanced enough to crop down to a 1.91:1 social card without losing the funnel.

The flat-vector treatment is deliberately reusable: swap the metaphor and keep the same three colors, line weight, and grain, and every future post header on the blog reads as one consistent series.