Card Accordion

The component is self-contained: one file, no dependencies, its own palette in local variables --vibeui-accordion-002-*. Native <details>/<summary> hold the disclosure, so the state works before hydration and needs no React. The sections are independent: the name attribute is deliberately absent here — in a list of cards closing a neighbour reads as a breakage. The cards have no fill by default: they sit on the page background and are held by their border alone. The theme comes from the surrounding color-scheme through light-dark(), and the dark branch is not an inversion of the light one: an outward shadow does not read on a dark ground, so the lift there is built from a glow. The marker is chosen with the marker prop and lives in a fixed-size round well, so changing the shape does not move the heading. Padding and type size are computed from the component's own width through @container.