Front and center of the card, you see three anthropomorphic cats engaged in a gym scene, exuding an illustrative charm akin to Beatrix Potter's work but with a contemporary twist. The cats are elegantly detailed, capturing both a realistic and whimsical essence, blending the precision of Norman Rockwell with the expressive lines of Quentin Blake.

1. **Cat 1:** Positioned at the forefront, a sleek, black-furred cat is lifting a set of miniature dumbbells. Its fur is intricately detailed with fine, swirling lines reminiscent of Aubrey Beardsley's style. The dumbbells are bright orange, their glossy surface reflecting light, offering a contrast to the cat's dark fur. The cat wears an orange sweatband around its forehead, adding a pop of color.

2. **Cat 2:** To the left, an orange tabby cat is perched on a yoga mat, which is a vibrant black with subtle orange paisley patterns, a nod to Edward Gorey's intricate backgrounds. The tabby is stretching, its limbs elongated with an elegant grace, akin to the fluidity seen in Arthur Rackham's illustrations. It wears a black tank top with orange piping, fitting snugly around its slender form.

3. **Cat 3:** On the right, a fluffy black-and-white cat is riding a stationary bicycle, the kind with exaggerated, old-fashioned design like something out of a Maurice Sendak book. The bicycle is painted in alternating black and orange stripes. The cat's tail is playfully wrapped around the handlebars, a humorous touch reminiscent of Quentin Blake's whimsical style.

**Background Elements:**

- The gym setting is subtly suggested rather than overt, with the backdrop a wash of soft, muted black tones transitioning to a gradient of warm oranges towards the edges, capturing the luminescent quality of Maxfield Parrish’s work.

- Behind the cats, there's a detailed line drawing of gym lockers, their metallic surfaces hinted at with delicate cross-hatching, echoing the detail of Gustave Doré's engravings.

- Hanging from the ceiling are banners with bold, orange lettering spelling out "Congratulations!" The font is playful yet elegant, capturing the celebratory theme without overpowering the detailed scene below.

This illustration should encapsulate a harmony of intricate detail and playful design, an inviting blend that celebrates the accomplishment with creativity and charm.

Generated with these themes: Three cats at the gym, and Black and orange colour theme.

Made with ❤️ by AI.