Expand/Collapse Widget Demo

This is the first expandable section. It demonstrates basic expand/collapse behavior with accessible controls.

• Accessible button with aria-expanded
• Content is contained within a .details container
• Animated height on open/close

The second example shows a longer content area so users can observe scrolling within the details container when expanded.

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1. Item one with extra detail
2. Item two with more content
3. Item three to emphasize length