/* ==========================================================================
   site-pictures.css: every content picture reads as it does on light paper,
   on every page, in both themes (owner 2026-09-29: "ALL IMAGES should be in
   white mode ... can you just do this sitewide?").

   A see-through picture (esa-img-clear: every maths plot, dark ink on no
   background) would put dark lines on the dark sheet, so the dark theme gives
   it a white card; it is never inverted, tinted or filtered. A picture-answer
   MCQ's pictures (esa-img-card) sit on the same white card in both themes, as
   the owner's MCQ picture guide says. The classes come from
   noteviewer/blocks_render.img_tag; the white is the one card token in
   notebook-tokens.css (one value in both themes). Linked by pages/base.html
   and pages/nb_base.html, so no page type can miss it.
   ========================================================================== */
html.theme-dark img.esa-img-clear,
img.esa-img-card {
  background: var(--nb-pset-card-bg);
  padding: var(--nb-s2);
  border-radius: var(--nb-r-sm);
  box-sizing: border-box;
}