Create an original Happy Birthday image for BirthdayTo. Use case: a birthday party invitation design with blank space for date, time, and venue. Style: kawaii pastel illustration, cute rounded details, cheerful soft palette. Audience: warm, romantic, tasteful, and personal without showing real people. Canvas: 3:4 aspect ratio, invitation poster layout with a strong title area and blank details area. Palette: electric blue, hot pink, violet, and clean black. Primary decorative focus: balloons, supported by birthday party details. Text requirement: include only the exact readable words "Happy Birthday"; no misspellings, no fake names, no dates, no small filler text. Composition requirement: high-quality finished image, clear focal point, clean margins, useful copy space, no watermark. Safety requirement: no recognizable real people, no celebrity likeness, no public figure, no brand logo, no trademarked character, no copyrighted character, no visible address, no license plate, no private-property identifier.
