Designed with a minimalist birthday look, the card centers on the words “Happy Birthday” across the middle in rounded, slightly tilted letters. The background is a muted blue‑green that feels calm, like a quiet moment shared between close friends 🎉. The main lettering is a deep teal, edged with an off‑white outline that gives it a soft, affectionate glow without looking fussy. Just beneath the teal letters, a lighter blue‑green layer sits like a gentle shadow, adding depth as if the words are lifting from the surface 🎂. The text stays firmly in the mid‑ground, leaving plenty of open space around it so the message feels direct and easy to read. Two sets of thin, parallel diagonal lines appear in opposite corners, one in the upper right and one in the lower left, guiding the eye across the design. Those corner lines are subtle and geometric, like small accents drawn with a steady hand against the smooth blue‑green field.