a dramatic vertical 4k background featuring dark, deep brown sandy textures with subtle seagull tracks, ideal for bold wallpapers

background vertical grainy wallpaper blur banner backdrop natural seagulls tracks sand dark deep brown 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 desertinspired warm featuring textures subtle seagull ideal wallpapers banners nature-inspired designs