Website UI: Update Header Spacing (Global)

[glaubernicolau]

Background/Context
Update Header Spacing with New Figma with corrected header spacing: [Figma — Website Deliverables](https://www.figma.com/design/5j0fQssrV9ipoU16P7hfKy/Website-Deliverables?node-id=1245-5015&t=giOwyVXInXuGJgqt-4).

Scope

• Update header spacing (font spacing, padding/margins) across the site to match the approved Figma
• Verify consistency across browsers (Chrome, Firefox, Safari, Edge) and OS (macOS, Windows)

Acceptance Criteria

• Header spacing matches approved Figma pixel-for-pixel (or within agreed tolerance)
• Verified consistent on macOS and Windows across supported browsers
• No regressions to header responsiveness or no-JS behavior
• Uses Boostlook.css tokens — no hardcoded spacing values

Out of Scope

• Any content or functional changes to header nav items

Design Reference

• [Figma — approved header spacing](https://www.figma.com/design/5j0fQssrV9ipoU16P7hfKy/Website-Deliverables?node-id=1245-5015&t=giOwyVXInXuGJgqt-4)