A small decorated Christmas tree standing on a snowy landscape under a starry night sky. The tree is adorned with colorful ornaments in red, purple, and blue, and lit with warm yellow lights. In the background, snow-covered houses and tall mountains rise softly beneath the stars. Snow blankets the ground and gently falls through the air, creating a serene and festive winter atmosphere. The composition is vertical and centered, optimized for mobile wallpaper.