"Generate a nature-inspired vector illustration for a T-shirt featuring a stylized mountain range with sharp, clean edges. The mountains should have gradient fills transitioning from deep green at the base to lighter green at the peaks. Place a large, glowing sun in the background, radiating soft orange and yellow hues. Include faintly drawn birds in silhouette style flying across the sun. Add a subtle wave-like pattern below the mountains to suggest rolling hills or water. Ensure the design has no background (clean, transparent) and is scalable for various shirt sizes. Deliver the design in a vector format, with well-defined color contrasts suitable for both light and dark shirts."