"Digital collectible card in a futuristic style for a fitness-themed mobile app, inspired by the Marvel Snap design. The card features a vibrant, high-tech border with neon blue and purple accents. The center showcases a stylized illustration of a fitness challenge, such as a person performing a push-up surrounded by holographic energy effects. The title 'Push-Up Challenge' is displayed in bold, glowing futuristic typography beneath the image. The background includes a sleek, metallic gradient with subtle geometric patterns, emphasizing a modern and premium aesthetic. Include dynamic lighting and a 3D depth effect to make the card visually striking and immersive."