Create a professional logistics and delivery icon set consisting of 4 icons arranged in a perfect 2x2 grid. Each icon must follow a consistent visual system and unified design language. ICON CONCEPTS: 1. Delivery Exchange Icon: Two simplified human figures (modern minimal style) facing each other. One is handing over a square package box to the other. Include a small forward arrow between them to indicate transfer. 2. Package Confirmation Icon: A slightly opened cardboard box with visible top flaps and a bold checkmark inside or overlaying the box to represent successful delivery or verification. 3. Tracking / Route Icon: A smooth curved S-shaped path with a location pin at the end point and a small cube/box at the starting point. The path should feel dynamic and directional. 4. Delivery Truck Icon: A side-view delivery truck with a rectangular cargo area. Inside the cargo area include simple fork and spoon symbols to represent food delivery service. STYLE & DESIGN RULES: - Use solid black (#000000) for all icons - Background must be pure white (#FFFFFF) - No gradients, no shadows, no textures - Flat design only - Fully vector-based look (SVG style) SHAPE & FORM: - Use geometric shapes (circles, rectangles, rounded corners) - Maintain consistent stroke width or solid fill style across all icons - Slightly rounded corners for modern UI feel - Equal visual weight across all icons PROPORTION & ALIGNMENT: - Icons centered inside equal square containers - Equal padding on a