Create an ultra-realistic luxury skincare campaign portrait poster for a fictional brand "LUMIÈRE". FORMAT: 4:5 vertical, glossy beauty-editorial layout. SUBJECT: a serene female model with flawless glowing dewy skin, water droplets on her cheek, eyes gently closed, soft petals near her face. BACKGROUND: soft blush-to-pearl gradient with delicate mist and gentle glow. LIGHTING: soft diffused beauty light, radiant skin highlights, ethereal fresh mood. TYPOGRAPHY: refined thin serif brand name "LUMIÈRE" centered top, tiny tagline "Skin that glows within" at the bottom. FINISH: 8k, hyper-realistic beauty photography, luminous premium finish.