"Generate a nature-inspired T-shirt design featuring a stylized mountain range with sharp, clean edges. Each mountain should have bold, black outlines defining their forms, with gradient fills transitioning from deep green to lighter green. Place a large, glowing sun in the background with a defined circular outline. Add silhouettes of birds with thick, visible borders for clarity. Include a subtle wave-like pattern below the mountains, also outlined. The design must have a transparent background and be delivered as a scalable vector file, ensuring strong outlines for cropping and adaptability."