「HAPPY BIRTHDAY」は FontVibe AI で作成したY2K バブリーの文字エフェクトです。Y2K バブリーの膨らんだ文字。パステルのピンクからパープルへ、ぷっくりと丸く柔らかな膨張フォルムに、ツヤのあるキャンディ質感を組み合わせました。2000年代のスウィートなパーティーガール美学です。

Y2K bubbly inflated letters — extremely round pillow-soft letter forms completely inflated like over-pressurized balloons. Pastel pink-to-lavender gradient across the glossy candy surface. Strong white specular highlight on the top of each inflated letter. Extremely smooth and soft surface. Sweet 2000s Y2K party aesthetic. Maximum bubbly inflation quality. LETTERFORM PRIORITY: when the chosen font carries its own treatment, that font's letterform shapes take priority and own the letters; this style governs the over-inflated pillow form, the glossy candy surface and the speculars. FALLBACK MATERIAL: if the font carries no material of its own, render the letters as extremely round over-inflated pillow letters with an ultra-smooth glossy candy surface and a strong white top specular. COLOR PRIORITY: keep the font's own colors if specified; otherwise a pastel pink-to-lavender gradient. Create a finished, joyful birthday title graphic with the exact words “HAPPY BIRTHDAY,” arranged on two centered lines: “HAPPY” above the wider, more prominent “BIRTHDAY.” Keep every letter clear, fully visible, and spelled exactly as provided. Let the oversized lettering dominate the composition, with generous breathing room around it and a confident, gently arched arrangement that feels celebratory rather than formal. Set the words against a soft pastel party backdrop with a subtle pink-to-lavender atmosphere, faint luminous haze, and delicate depth. Surround the title with a carefully balanced scattering of small glossy balloons, tiny hearts, starbursts, and curling ribbons; keep these accents secondary and leave the letter edges unobstructed. Add a few restrained white sparkle glints near the lettering to echo its shiny, inflated surface. Use soft overhead illumination, rounded reflections, and gentle shadows beneath the title so the words feel buoyant and dimensional within the scene. The overall image should feel like a polished Y2K birthday-card cover: sweet, exuberant, tactile, and immediately legible, with a clear visual hierarchy centered on the exact birthday greeting.