Design a lightweight metal structure in the shape of a half-cut pumpkin, with a sleek, curved form. The exterior is clad in black concrete sheets, creating a solid yet minimalist skin. Organic-shaped translucent orange openings are integrated into the concrete surface, allowing light to filter through and cast soft, glowing patterns. The structure should blend the strength and heaviness of concrete with the lightness of the metal framework, creating a modern and artistic contrast. The orange light coming through the organic shapes should create an inviting and dynamic interior ambiance.