The greeting card's front cover should feature a whimsical flat earth scene in a clean vector style, using flat shapes and crisp lines. Center the composition around a circular representation of the earth, flattened like a disk.

**Earth and Scene Details:**

1. **Earth**: The disk should be divided into distinct sections, each showcasing a different iconic landscape, using vibrant, flat colors. Use lush greens for a stylized forest section with triangular trees, sandy yellows for a desert segment featuring a minimalist cactus, and deep blues for a simplified ocean with gentle waves.

2. **Edge of the Earth**: Illustrate a subtle, playful waterfall cascading off the edge of the earth disk, using layers of light and dark blues to depict the water.

3. **Background**: A clear sky in a gradient from light blue at the horizon to a deeper blue at the top. Include minimalistic, fluffy clouds in white to break up the solid color of the sky.

**Valentine's Day Elements:**

1. **Heart-Shaped Hot Air Balloons**: Include two or three floating heart-shaped hot air balloons in varying shades of red and pink. Have them hover above the earth disk, adding a touch of Valentine's whimsy.

2. **Cupid with Arrow**: Position a minimalist, silhouette-style Cupid, drawn with clean lines, aiming an arrow towards the earth from the side of the composition.

**Text Element:**

- Add the name "John" on a ribbon banner that arches over the top of the earth disk. The banner should be a striking red, with white, bold letters spelling out "John" in a clean, modern sans-serif font.

This composition should celebrate Valentine's Day with playful, romantic imagery while incorporating the theme of flat earth in a humorous and visually engaging manner, inspired by the modern, flat style of the artists mentioned.

Generated with these themes: Flat earth .

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