A professional audiobook cover art, square 1024x1024 format, in a neo-noir, subtly stylized illustrative art style. The central imagery features a silhouetted, sophisticated female figure, seen from the shoulders up, facing slightly away from the viewer but with a glimpse of a sharp, determined profile. She is positioned against a background that suggests a dimly lit, rain-slicked urban environment at twilight – think abstract geometric shapes of distant, glowing windows and the subtle reflections on wet pavement. Dominant colors are deep indigo, charcoal grey, and a sharp, almost electric, cool blue or teal highlight, perhaps emanating from a single, abstract light source casting long, dramatic shadows. The mood is enigmatic, sophisticated, and hints at danger and intelligence. No text, no letters, no words, no title, no author name. The composition should be balanced, with a strong focal point on the silhouette and a sense of depth conveyed by the atmospheric background. The overall aesthetic should feel premium and intriguing, suitable for a high-quality mystery or thriller audiobook.