Create a premium vertical product advertising poster for a fictional luxury fragrance brand "NIGHT WHISPER". Preserve bold modern product-poster logic: single hero perfume bottle centered, fully saturated monochrome background, oversized headline behind the bottle, vertical side label, short bottom descriptor. COMPOSITION: a sleek crystal bottle with an ornate stopper slightly below center on a seamless deep midnight-blue background, a swirl of purple-and-indigo fragrance mist suspended mid-air, scattered dried flowers and a crisp diagonal shadow. TYPOGRAPHY: large bold silver stacked headline "DARK / MYSTERY" behind the bottle; slim vertical left label "MIDNIGHT GARDENIA"; bottom line "SENSUAL, TIMELESS, UNFORGETTABLE." LIGHTING: strong clean directional light upper-left, glossy bottle and mist highlights, elegant shadow. STYLE: Cannes-level luxury fragrance advertising, ultra-real. NEGATIVE: cheap packaging, cluttered layout, plastic texture, muddy background, weak shadow, unreadable text, watermark. 8k.