Aurora in a Drinking Glass

Generate exactly one image. Intended aspect ratio 3:4. A tall ordinary clear drinking glass on a weathered kitchen windowsill at midnight, containing a ribbon of aurora light suspended just above still water. Outside is a simple dark courtyard, not a polar landscape. The aurora glows pale green with a tiny violet edge, reflections obey the glass curvature. Poetic fine-art photograph, intimate close framing, worn white paint and blue night tones, one improbable luminous event. No stars inside glass, no text, no decorative props.