Design a futuristic shopping mall with a Halloween theme, blending sleek, avant-garde architecture with eerie, immersive elements. The building should have bold, sharp angles and glass facades, mixed with dark, matte finishes like black steel or charcoal concrete. Include dramatic lighting that casts shadows and highlights key architectural features. Inside, the mall has wide, open spaces with hanging structures inspired by Halloween motifs like spider webs, ghostly figures, and pumpkin lanterns. The decor features subtle spooky elements integrated into the modern design—glowing pathways, mist-filled corridors, and reflective surfaces that distort the environment, adding to the eerie ambiance. The exterior should evoke a sense of mystery, with towering structures, large glass panels, and geometric shapes that give the mall a futuristic yet haunting look.