🎨 Palette: Skip to Main Content Link

[0m364]

💡 What: Added visually hidden "Skip to main content" links to the top of all primary pages (index.html, products.html, concepts.html, contact.html).
🎯 Why: Keyboard users (navigating via Tab) are forced to repeatedly tab through the entire header/navigation menu on every page load to reach the content. This bypass link solves that repetition.
📸 Before/After: Before, keyboard users had to tab ~5 times to reach the main content. Now, the very first tab focuses the skip link, instantly revealing the button and allowing immediate access to the main content.
♿ Accessibility: The .skip-link uses absolute off-screen positioning so it doesn't affect visual users. On :focus, it jumps on-screen with high contrast styles. The corresponding <main> tags received the matching id="main-content". Added an entry to .Jules/palette.md to document this critical accessibility learning.

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PR created automatically by Jules for task 9930004765133091578 started by @0m364

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