Free LinkedIn Banners Event Cover in Dark Tech Blue

LinkedIn cover banner for: free linkedin banners. Tagline: free linkedin banners. Audience: marketers. Banner kind: event / conference. Style: dark professional, tech blue + gradient palette. Render the tagline as clean placeholder typography aligned to the safe zone (mobile crop). Left side reserved for profile picture overlap (no important elements bottom-left). 1584×396 LinkedIn cover proportions, no watermarks. No real-celebrity faces. No misleading professional credentials. Tagline text rendered sharp and grammatical. Target search intent (rendered visually, no on-image text): "free linkedin banners" (en).