On a clean white background, envision a cheerful birthday scene composed in a flat vector style with crisp, precise lines. Imagine a large, round birthday cake taking center stage. The cake is adorned with smooth, colorful frosting layers in pastel shades of mint green, soft pink, and light lavender. Atop the cake are perfectly round, whimsical candles in bright yellow, standing straight and evenly spaced.

To the left and right of the cake, a bunch of vibrant balloons in bold, solid colors like cyan blue, sunny yellow, and magenta hover in mid-air. The balloons are round with subtle highlights and are tied with thin, swirling strings in light gray. These strings curl and extend towards the cake.

Above the scene, a simple, arched banner stretches across the card. The banner is a smooth, light sky blue with a gentle curve and outlined with a thin white line for definition. Boldly printed on the banner in a sleek, sans-serif font is the name "Sandy" in a deep navy blue, making it stand out against the lighter background.

Ensure that each element is sharply defined, with a focus on flat colors and geometric shapes, echoing the aesthetic of artists like Patrick Seymour and Malika Favre. The scene is minimal yet lively, playing with bold contrasts and clean, uncluttered design elements that maintain a playful and engaging appearance.

Generated with these themes: Cake, Balloons, and White background.

Made with ❤️ by AI.