Bandeau fb sombre pour bannière sociale multi-plateforme

Multi-platform social cover banner for bandeau fb. Primary platform: Reddit community banner. Tagline: bandeau fb. Vibe: dark moody, dark mode palette. Strong visual hierarchy with the brand name + tagline rendered as clean placeholder typography. Safe zone awareness so important content stays in the visible center across crops. No watermarks. No real-celebrity likenesses. No copyrighted franchise look-alikes. Target search intent (rendered visually, no on-image text): "bandeau fb" (fr).