Bannière rétro Y2K chrome pour format couv facebook

Multi-platform social cover banner for format couv facebook. Primary platform: Twitter / X header. Tagline: format couv facebook. Vibe: vintage retro, y2k chrome 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): "format couv facebook" (fr).