refactor: respect HTML Semantic Elements and clean style

[Quentame]

Respect HTML Semantic Elements: https://www.w3schools.com/html/html5_semantic_elements.asp

Before

• body
  • div.container
    • div.nav-bar
      • a & h1
      • ul
  • div.container.content
    • (page content)
  • div.container
    • div.footer
  • ... (script, style ...)

After

• body
  • div.container
    • header.nav-bar
      • a & h1
      • nav
        • ul
    • main
      • (page content)
    • footer.footer
  • ... (script, style ...)

Also permits to manage only one .container for all pages.
.container design inspired from the Bootstrap framework : https://getbootstrap.com/docs/5.3/layout/containers/

Clean unused / doubled CSS rules

Also contains some formating of base.html as #1025 did for other HTML files

[Copilot]

Pull request overview

This PR refactors the HTML structure to use semantic HTML5 elements (header, nav, main, footer) instead of generic divs, consolidates the container structure to a single wrapper, and removes unused CSS rules. The changes improve code maintainability and follow HTML5 best practices.

Changes:

• Replaced generic div elements with semantic HTML5 elements (header, nav, main, footer) in the base layout
• Consolidated three separate container divs into a single container wrapping all content
• Removed unused CSS rules (.logo, .initiative, nav-bar img styles) and duplicate properties
• Improved template variable formatting for consistency (spacing around {{ and }})

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
site/src/_layouts/base.html	Refactored to use semantic HTML elements and improved template formatting; consolidated container structure
site/src/_static/styles.css	Removed unused CSS classes and duplicate properties; improved responsive design organization

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[frenck]

Looks good to me, thanks @Quentame 👍

../Frenck

                       

Blogging my personal ramblings at frenck.dev