Craft a sleek footer for a home page for Darkcave's fitness apparel, focusing on black and white tones. Feature a striking black and white hero image showcasing intense workouts. Use clean typography for a brief about section, emphasizing Darkcave's dedication to high-quality fitness gear. Highlight four main product categories with impactful black and white images. Encourage sign-ups and product exploration with a clear call-to-action. Integrate a dynamic black and white video snippet. The footer should include contact info, social links, and a newsletter sign-up, maintaining the bold theme. Conclude with a strong call-to-action, inviting fitness enthusiasts to conquer workouts with Darkcave's iconic black and white apparel.