Minimalist Social Media Graphics Set

I need a suite of clean, minimalist social-media graphics tailored for Facebook, Instagram and Snap. The look should echo modern flat-design sensibilities—ample white space, limited colour palette and sharp typography—so the visuals stay consistent with the brand tone I’m building.

Here’s what I’m expecting:
• Three platform-optimised post templates (1080×1080 for Instagram, 1200×628 for Facebook, 1080×1920 for Snap stories)
• Matching profile/cover images where each platform allows
• Source files in layered PSD or AI plus web-ready PNG/JPG exports
• Clear guidance on the font and colour codes you use so I can keep future posts on brand

Please ensure every element follows the minimalist direction I selected. If you have previous examples that show this style, include them in your proposal.