Fondo de pantalla vertical navideño sin texto con un abeto iluminado junto a una ventana escarchada de noche. Luces cálidas y bolas rojas brillan en el árbol en una habitación oscura, y la ventana muestra un bosque nevado con cabañas lejanas iluminadas. Añade tu propio saludo, nombre o fecha en el espacio oscuro sobre el árbol para crear una tarjeta o fondo de móvil.

Create a finished vertical 9:16 Christmas phone wallpaper, with no text, lettering, clock, widgets, phone frame, or app icons. A single softly glowing Christmas tree stands beside a tall frosty window in the lower half of the image, its silhouette and ornaments clear at phone-thumbnail size. Dress it with a restrained scattering of warm amber fairy lights and a few small muted red ornaments; let the lights glow gently without bright hotspots. Outside the window, show a quiet midnight-blue winter sky with faint snow and delicate frost tracing the glass edges. Keep the entire upper third dark, calm, spacious, and low-detail for a lock-screen clock. Let the tree and window occupy the lower half, with the brightest detail below the midpoint; preserve generous safe margins and avoid busy detail behind the clock area. Use a cozy painterly illustration with softly brushed evergreen needles, subtle glass frost, a faint warm reflection on the pane, and gentle shadows. Palette: deep midnight blue, evergreen, muted cranberry, warm amber, and cool frost silver. Warm light from the tree should softly meet the cool blue night, creating a peaceful, intimate Christmas-at-home feeling. Keep the composition uncluttered and atmospheric; no other Christmas motifs or extra objects.