Create a cinematic vertical anime illustration of a quiet old art classroom after rain, where {argument name="character name" default="a teenage schoolgirl"} sits sideways on the edge of a worn wooden desk near the left side of the room. She has {argument name="hair color" default="long wavy dark brown hair"}, soft expressive eyes, a calm wistful expression, and wears {argument name="outfit" default="a cream cardigan over a teal blouse with a long navy skirt and brown shoes"}. The classroom is warmly lit by late-afternoon sunlight pouring through exactly three large window sections on the right wall, with sheer white curtains glowing and drifting slightly; outside, show a wet school courtyard, greenery, and an old school building reflected in rain puddles. Include exactly one chalkboard on the back-left wall with faint chalk writing and pinned papers, exactly two wooden desks in the foreground and right side, one open sketchbook with architectural drawings on the front desk, jars of brushes, books, stacked papers, small framed paintings, a plaster bust, stools, and aged wooden floorboards. The key magical element is the girl's shadow stretching across the floor and transforming into {argument name="fantasy element" default="a luminous miniature galaxy train"}: a silver-white train with multiple connected cars curving through a star-filled cosmic river on the classroom floor, complete with glowing rails, constellations, tiny planets, nebula dust, sparkles, floating paper fragments, and delicate bridges or station-like structures. Blend realism and fantasy seamlessly so the cosmic train appears to emerge from the dark shadow beneath her feet. Use detailed Japanese anime painterly style, rich environmental storytelling, soft golden rim light, volumetric sunbeams, rain-afterglow atmosphere, intricate highlights, deep navy cosmic blues contrasted with warm amber classroom light, high detail, vertical composition, no watermark, no readable modern signage, no extra characters.