Development record

The disclosure marker glyph is part of the accessible name on every folded panel: .panel.fold summary h3::before renders a triangle that screen readers announce as text, so the panel is read out as 'triangle References and sources 28'. aria-hidden cannot apply to a pseudo-element; the remedies are a background-image marker or content:\"triangle\" / \"\" alt-text syntax. Pre-existing pattern elsewhere in the stylesheet, newly multiplied by the folded panels.