Minimalist Swiss Birthday Postcard for Online Postcard Mailing

Postcard design celebrating / promoting: online postcard mailing. Postcard kind: birthday card. Visual style: minimalist swiss, elegant refined mood, minimal cream and navy palette. Hero illustration / photograph with the message / location name / company name rendered as clean placeholder typography in matching style. Print-ready 6×4 inch postcard composition, strong visual hierarchy, no watermarks. No real-celebrity faces. Where the postcard references a real location, render it tastefully and recognisably without infringing copyrighted attractions. Placeholder text rendered sharp and readable. Target search intent (rendered visually, no on-image text): "online postcard mailing" (en).