A cozy library inside a mouse burrow. A Russian fairy-tale girl mouse in a sarafan and kokoshnik sits in a walnut-shell armchair, reading a tiny book. Around: tall shelves filled with leather-bound books, a ladder, a candle on a side table, a cup of tea, a sleeping cat figurine, a globe. Warm candlelight from below. Vertical illustration drawn in vibrant alcohol marker illustration style, reminiscent of children's storybook art. Bold vibrant marker strokes, visible hatching and cross-hatching, kraft paper texture, sketchy whimsical linework, warm fairy-tale palette — deep browns, golden ochres, warm reds, rich blues. Background nearly black, rendered with soft marker strokes for velvety depth. Cozy underground burrow atmosphere, warm candlelight, consistent character design. Vertical portrait orientation, 2:3 aspect ratio.
