5x7 white card mockup on a round glass table, seamlessly blending elegant natural textures within a luxurious, monochrome setting. The card should rest gracefully on the glass, surrounded by subtle elements like a monochromatic bouquet or textured linens, enhancing the luxury feel. Emphasize the interplay of refined textures and the sleekness of the glass, creating a harmonious balance between organic and modern elements. The overall aesthetic should be clean and sophisticated, with a focus on the nuanced details and a restrained color palette, reflecting an upscale, contemporary elegance --ar 2:3