The front cover of the birthday greeting card features a delightful and whimsical scene set in a lush garden, much like those illustrated by Beatrix Potter, with a touch of Quentin Blake's playful chaos.

At the center, a large, black Newfoundland dog sits majestically, its fluffy coat intricately detailed with the fine lines reminiscent of Arthur Rackham's work. The dog's expressive eyes are wide and joyful, as if it's in on the celebration's secret. Perched on the Newfoundland's head is a small, colorful party hat, tipped slightly to the side, echoing the whimsical style of Maurice Sendak.

Surrounding the dog are clusters of vibrant balloons in various sizes, with shades ranging from pastel pinks and blues to bright yellows and reds, inspired by Maxfield Parrish's vibrant palette. Each balloon is tied with a delicate string, some floating upwards and some tethered to the ground, adding an element of movement.

In the background, an old-fashioned wooden picnic table is set up with a cake that boasts a textured frosting, similar to the detailed work of Norman Rockwell. The cake is adorned with miniature dog bone-shaped decorations and a banner running across it that reads "Aunt Jill" in a flourish of elegant, Edward Gorey-like script. The letters are whimsical, with tiny illustrations of paw prints and small flowers woven around them.

In the background, lush green foliage and towering trees form a canopy, creating a sense of depth reminiscent of N.C. Wyeth's landscapes. Hidden amongst the leaves are small woodland creatures, peeking out as curious onlookers to the festive scene.

The sky above is a gentle watercolor wash of blues and whites, with a few fluffy clouds, inspired by Gustave Doré's detailed skyscapes. A small biplane, drawn in the style of a classic Beardsley etching, trails a banner reading "Happy Birthday!" in festive, looping script.

This dynamic and detailed illustration blends elements of nature and celebration with a nod to classic illustration styles, ensuring Aunt Jill's birthday card is a piece of art in its own right.

Generated with these themes: Black Newfoundland, and Balloons.

Made with ❤️ by AI.