Hyper-realistic oil painting on canvas, ultra-detailed, mystical river scene at dusk, extreme low-key lighting, almost total darkness, dramatic chiaroscuro, deep shadows, rich oil texture, visible brushstrokes, canvas grain. A young bereginya — a river spirit, a guardian of the water — stands knee-deep in a dark, slow river, her pale, almost translucent skin faintly glowing with a cold inner light, like moonlight through water. Her skin is hyper-realistic — visible pores, fine vellus hairs, a faint sheen of wetness, soft rendering of light on the skin. Her long, light-brown hair is wet, tangled with river grass, tiny white flowers, and strands of algae, merging with the water around her. Her eyes are deep, dark, full of an ancient, unspoken sorrow — the sorrow of a love that was never returned. Her expression is calm, distant, melancholic — not angry, not seductive, but quietly grieving. She is draped in a thin, torn linen shift, clinging to her body, wet, barely covering her — the fabric is almost transparent, revealing the soft line of her collarbones, her stomach, and her long, bare legs beneath the water. Her bare feet are buried in the river mud, toes visible, soles sunk into the silt. Behind her, an ancient willow tree bends over the water, its branches trailing the surface. The moon hangs low, casting a silver path on the river. Mist rises from the water, wrapping around her legs. Fireflies float in the air. The only light comes from the moon and the faint glow of her skin, falling only on her face, her collarbones, her hands, and the curve of her shoulder. Everything else — the river, the willow, the shadows — dissolves into deep darkness. The mood is sorrowful, mystical, and eternal — a spirit who waits for someone who will never return. Her skin is hyper-realistic — visible pores, fine vellus hairs, natural imperfections, no smoothness, no airbrushing. Rich oil texture, visible brushstrokes, canvas grain, no retouching. Painting style influenced by Vyacheslav Groshev (photorealism, soft skin rendering, elegant portraiture) and Ilya Repin (Russian realism, powerful light and shadow, emotional depth). Fine art, 8K resolution, 3:4 aspect ratio.