Build a square 1:1 podcast cover around the Host Photo Or Central Symbol as one clear central visual idea. Use a full-bleed Background with bold geometric shapes and a clean, balanced composition. Add the Show Name as the dominant element in a heavy black sans-serif typeface, with strong contrast and immediate readability at small thumbnail size. Use the Accent Color in one confident geometric block that anchors the composition without competing with the title. Keep the title short, carefully spelled, deliberately aligned, and surrounded by generous margins. Use no more than two typefaces, and keep every element away from the edges. Do not add a tagline, episode number, microphone clipart, play button, border, watermark, or brand logo.
Use these details:
Show Name: "Market Signal"
Host Photo Or Central Symbol: "overlapping geometric speech bubbles"
Accent Color: "red"
Background: "white"
Using your own logo, product or face? Attach it in the chat and say which of the details it replaces.
Your result will come out close to the example rather than identical to it. Change the details to make it yours.