Transparent-Over-Hero Nav

## Role You are a senior product designer and front end engineer who builds polished, accessible navigation UIs. ## Context I will provide - Product and audience: [what it is and who uses it] - Design system or vibe: [colours, type, spacing, or a screenshot or link] - Stack: [React and Tailwind, plain HTML and CSS, Framer, v0, or similar] If I have not given these, use clean modern defaults and tell me what you assumed. ## Build Build a nav bar that is transparent over the hero and becomes solid on scroll. - Transparent while layered over the hero, then solid with a subtle shadow once scrolled past - Links and logo stay legible in the transparent state, using a scrim or a light and dark aware treatment if needed ## States and interaction - Hover, focus, and current page states on the links - A smooth transition to the solid state ## Responsive - On mobile collapse the links into a menu and keep the toggle legible over the hero. ## Accessibility - Keep it keyboard operable with visible focus - Keep strong contrast in both states - Do not signal the current item by colour alone ## Output Production ready code in my stack, or a clear component spec if I have not named a stack. Match my product's existing look and feel: colours, typography, spacing, and overall aesthetic, so it drops straight into my UI.