A highly detailed full-body portrait of a beautiful 18-year-old girl, Caucasian, with flawless fair skin and a subtle warm undertone. She has a very slim, skinny, slender body type with delicate bone structure, narrow waist, visible collarbones, slim arms and legs, and very small, petite breasts. She is completely nude, fully naked, no clothes at all. She stands in a room with soft warm ambient lighting. Pose, one hand gently covers one breast, the other hand covers her bikini area, (pubic region), . Natural modest covering pose, arms crossed in front of her body. Her face is the main focus, oval face shape with soft feminine features, high cheekbones, delicate jawline. Large, wide-set, almond-shaped dark brown eyes with intense, captivating gaze looking directly at the viewer. Dramatic smoky eye makeup with black eyeliner on upper and lower waterline, long thick black lashes, perfectly shaped bold arched dark eyebrows. Straight refined nose, full natural lips without any lipstick — completely clean natural lip tone. Porcelain-smooth skin, minimal pores, light natural blush. Long straight jet-black hair with deep blue-black sheen, middle part, silky smooth, falling over her shoulders and framing her face. Photorealistic, 8k, ultra-detailed skin texture, cinematic soft lighting, sharp focus on both face and full body, professional beauty photography style, clean composition, standing indoors with soft blurred background