This commit provides fixes for issues identified in your feedback following the initial ParVagues subsite UI/UX enhancements.

Key corrections include:

1.  **Header Rewrite:**
    *   The header component (`ParVaguesHeader.js`) was further refined to ensure a strict single-row layout.
    *   Logo is fixed to the top-left, navigation links are spaced out in the center, and the "Book" button is fixed to the top-right.
    *   Header height and element spacing were adjusted for a thinner appearance.

2.  **"Potentiel / Composition / Performance" Interactivity:**
    *   I verified that the highlighting of the section heading (Potentiel, Composition, Performance) correctly corresponds to the active section and displayed image carousel.
    *   I confirmed that the entire clickable block for each section (title and description) correctly displays a link pointer cursor on hover. (I confirmed no code changes were needed here, the existing implementation was correct).

3.  **Event Page Image Gallery:**
    *   I corrected a critical positioning issue where gallery images were rendering outside the page flow. I added `position: relative` to the gallery container (`galleryGrid`) to properly scope absolutely positioned child elements (masonry items).
    *   I verified that images render as fixed-size cards within the gallery section and that modal functionality (on-click, close button, Esc key) is working as intended.

4.  **Footer Logo Centering Regression:**
    *   The footer logo is now correctly centered within its designated middle column. I added `flex justify-center` to the logo's immediate wrapper `div` to ensure horizontal centering.

These changes address the specific points you raised in the feedback, aiming to deliver the intended UI behavior and visual presentation for the ParVagues subsite.