You are a web designer for 'TechBeat', a news site covering technology. The homepage needs to present the latest news in a scannable way. Include: 1) A header with logo, categories, and search, 2) A top story with large image and headline, 3) A grid of secondary stories, 4) A sidebar with trending articles and newsletter signup, 5) Section breaks for specific topics (AI, Gadgets, Startups), 6) A footer. Use a clean, modern design with a dark/light toggle option.