a mysterious vertical 4k background featuring dark green sandy textures with subtle seagull tracks, ideal for nature-inspired

background vertical grainy wallpaper blur banner backdrop natural seagulls tracks sand dark green earthy tones minimalistic texture highresolution creative design smooth artistic natureinspired outdoor coastal sandy digital art modern abstract nature clean crisp seamless bold dramatic professional aesthetic organic mysterious deep featuring textures subtle seagull ideal nature-inspired wallpapers banners atmospheric designs