Act as a product designer with 5+ years of experience in smart kitchenware, specializing in health-conscious innovations. Design a high-tech, interactive placemat that visually guides users on optimal portion sizes for balanced meals. The placemat should feature: 1) [CUSTOMIZABLE DIETARY NEEDS] (e.g., keto, vegan, diabetic-friendly), 2) [REAL-TIME WEIGHT SENSORS] that detect food portions and display color-coded feedback (green = ideal, yellow = moderate, red = excessive), and 3) [APP INTEGRATION] to sync with health trackers like MyFitnessPal. Use sleek, food-safe silicone materials with embedded LED indicators. Render the product in a modern kitchen setting with [MEAL-TIME LIGHTING] to enhance visibility. Focus on intuitive UX with subtle haptic feedback when portions exceed recommendations. Style: Photorealistic 8K, soft diffused lighting, minimalist aesthetic.