A vertical mobile wallpaper, digital collage style, magazine editorial. A young female K-pop idol posing facing the camera, showcasing stylish clothing details. Detailed stripes on her off-shoulder knitwear, edgy platform leather boots. Trendy cool-toned color palette (silver, charcoal, deep black). White cutout border around the character. Upper: clean July 2026 calendar typography. Lower: desaturated urban street background. Lower right: layered Polaroid overlay with "Happy Birthday" handwritten script. Cinematic lighting, muted moody tones, film grain, artistic fashion spread, ultra-detailed --ar 4:5