No titles or text, only image. Design a minimalist book cover where the characters occupy only the lower two-thirds of the composition Design a soft yet emotionally powerful book cover, focusing purely on the image with no titles or text. Elena, a sensual and modern young woman, stands in the foreground, her casual outfit (jeans and a light top) illuminated by the ethereal glow of a large full moon. Her figure is clear but minimal, emphasizing her posture and presence rather than facial details. Behind her, in the shadows, is the subtle silhouette of Sergio, blending into the darkness, adding an element of intrigue and tension. The background features an artistic, slightly abstracted Madrid skyline, fading gently into a pastel sky with tones of lavender and soft blue. The overall composition is balanced, with a delicate use of light and shadow, focusing on creating an emotional connection through color and atmosphere.