Enhance visibility of skeleton loading indicators

[nicolasgioanni]

This pull request updates the skeleton loading styles to enhance their visual appearance and accessibility. The changes include improvements to the gradient backgrounds, the addition of a new animated accent for selected results, and adjustments for users with reduced motion preferences.

Skeleton visual improvements:

• Updated the main skeleton background gradient to use more distinct color stops, increased the background size, and added subtle box shadows for better depth.
• Modified the shimmer animation to use a wider background position range for a smoother effect.

Selected result accent animation:

• Added a new animated accent bar to .selected-result-skeleton using a ::before pseudo-element with a custom gradient and a sliding animation. [1] [2]
• Introduced the skeleton-accent-slide keyframes for the accent animation, creating a dynamic scaling and opacity effect.

Accessibility enhancements:

• Updated media queries to disable both shimmer and accent animations for users who prefer reduced motion, ensuring accessibility compliance.

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Project	Deployment	Actions	Updated (UTC)
compliance-label-assistant	Ready	Preview, Comment	Jul 1, 2026 3:43am

[nicolasgioanni]

All tests passed