Build an Accordion

Build an accordion from the provided SECTIONS data. The starter renders every section expanded — make each one toggle on its own.

Requirements

• Clicking a section's title expands or collapses that section.
• Sections toggle independently: any number can be open at once.
• All sections start collapsed.
• Keep aria-expanded on each title button in sync (the chevron flips off it).

Follow-up

How would you change the model so only one section can be open at a time — and which of the two models would you ship as a reusable component's default?