Minimalist Pastel Birthday Invite Design

I need a clean, minimalist birthday invitation visual that uses a soft pastel palette. The artwork should feel airy and modern—think ample white space, gentle color blocks, and simple line work rather than busy illustrations or photorealistic elements. Please weave in a short celebratory message (I’ll provide the exact wording once we start), positioning it so it remains legible on both mobile screens and printed postcards.

Deliverables:
• One high-resolution invite image in both PNG and print-ready PDF formats
• An editable source file (AI, PSD, or Figma) so I can tweak dates or names later if needed

Acceptance: the final file should keep its minimalist aesthetic, stay within the pastel range, and have the message correctly typeset and aligned.