/* ===========================================================
   search.css -- SECTION CSS for "Как работает поиск по документам"
   (the 2D vector-space map -- AtlasMD 3.8).

   Scope: ONLY the vector-map plot + side rail + drill-card blocks that base.css
   does not ship as shared shells (plot, points, cosine rings, kNN rail, chunk /
   why-not-top-k card blocks). It reuses base.css shells where they exist:
   .plate / .plate-head / .compass, .breadcrumb, .zoomout / .deeper,
   .detail-panel, .progress-strip, .site-header / .site-footer.

   base.css is NEVER edited or forked. Every color/space/motion value here comes
   from a theme token (var(--...)); selection/focus uses the themed sepia/rust
   ring (--c-focus), NEVER the default blue. Tokens consumed live in
   themes/atlas.css (--c-*, --sp-*, --fs-*, --radius-*, --shadow-*, --dur-*,
   --ease-*, --green-text, --c-progress, --green).
   =========================================================== */

/* ---- toolbar row: breadcrumb + zoom-out (own row, NOT the compass row) ---- */
.vmap-toolbar {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  flex-wrap: wrap;
  margin: var(--sp-2) 0 var(--sp-3);
  position: relative;
  z-index: 2;
}
.vmap-toolbar .zoomout { margin-left: auto; }

/* ---- layout: plot + side rail ---- */
.vmap-grid {
  display: grid;
  grid-template-columns: 1fr 268px;
  gap: var(--sp-3);
  align-items: start;
  position: relative;
  z-index: 2;
}

/* ---- the plot frame (drilldown stage) ---- */
.plot-frame {
  position: relative;
  background: var(--c-bg);
  border: var(--bw-1) solid var(--c-border);
  border-radius: var(--radius-md);
  box-shadow: inset 0 0 30px rgba(60, 46, 26, 0.1);
}
.plot {
  display: block;
  width: 100%;
  height: auto;
  touch-action: manipulation;
  border-radius: var(--radius-md);
}

/* graticule + cosine rings (decoration) */
.plot .graticule { stroke: var(--c-border); stroke-width: 0.5; opacity: 0.5; fill: none; }
.plot .ring {
  fill: none;
  stroke: var(--c-text-muted);
  stroke-width: 0.8;
  opacity: 0.55;
  stroke-dasharray: 3 4;
}
.plot .ring-label { font-family: var(--font-mono); font-size: 8px; fill: var(--c-text-muted); opacity: 0.85; }
.plot .axis-line { stroke: var(--c-border); stroke-width: 0.7; opacity: 0.6; }
.plot .axis-cap { font-family: var(--font-ui); font-size: 9px; fill: var(--c-text-muted); letter-spacing: 0.08em; }

/* query -> top-k links (draw on highlight) */
.plot .vlink {
  stroke: var(--c-progress);
  stroke-width: 1.4;
  fill: none;
  opacity: 0;
  stroke-dasharray: 120;
  stroke-dashoffset: 120;
  transition: stroke-dashoffset 0.6s var(--ease-1), opacity var(--dur-2) var(--ease-1);
}
.plot .vlink.on { opacity: 0.55; stroke-dashoffset: 0; }

/* ---- points ---- */
.plot .pt { cursor: pointer; }
.plot .pt-hit { fill: transparent; }
.plot .dot {
  transition: opacity var(--dur-2) var(--ease-1), transform var(--dur-2) var(--ease-1);
  transform-origin: center;
  transform-box: fill-box;
}
.plot .pt-lbl { font-family: var(--font-ui); font-size: 9.5px; fill: var(--c-text); pointer-events: none; }
.plot .pt-cos { font-family: var(--font-mono); font-size: 8.5px; pointer-events: none; }

/* DIDACTIC settle: doc points pre-placed at the query origin, then move out to
   their cosine-determined position. Transform/opacity only. */
.plot .pt.doc {
  opacity: 0;
  transform: translate(var(--dx, 0), var(--dy, 0));
  transition: transform 0.9s var(--ease-1), opacity 0.5s var(--ease-1);
}
.plot .pt.doc.settled { opacity: 1; transform: translate(0, 0); }
.plot .pt.query { opacity: 0; transition: opacity 0.5s var(--ease-1); }
.plot .pt.query.settled { opacity: 1; }

/* point colors -- near = earned green, far = sand (lower weight, STILL drillable) */
.plot .pt.query .dot { fill: var(--c-progress); stroke: var(--green-text); stroke-width: 1.5; }
.plot .pt.near .dot { fill: var(--c-progress); stroke: var(--green-text); stroke-width: 1.2; opacity: 0; }
.plot .pt.near.lit .dot { opacity: 1; }
.plot .pt.near .pt-cos { fill: var(--green-text); }
.plot .pt.query .pt-cos { fill: var(--green-text); }
.plot .pt.far .dot { fill: var(--c-surface-2); stroke: var(--c-text-muted); stroke-width: 1; }
.plot .pt.far .pt-lbl { fill: var(--c-text-muted); }
.plot .pt.far .pt-cos { fill: var(--c-text-muted); }

/* THEMED focus + selection ring (sepia/rust, NEVER blue -- AtlasMD 3.13) */
.plot .pt:focus { outline: none; }
.plot .pt:focus-visible { outline: none; }
.plot .pt:focus-visible .dot { stroke: var(--c-focus); stroke-width: 2.6; }
.plot .pt:focus-visible .pt-focus { opacity: 1; }
.plot .pt.selected .dot { stroke: var(--c-focus); stroke-width: 2.6; }
.plot .pt.selected .pt-focus { opacity: 1; }
.plot .pt-focus {
  fill: none;
  stroke: var(--c-focus);
  stroke-width: 1.4;
  opacity: 0;
  stroke-dasharray: 2 3;
}

/* NEXT-STEP highlight: glow the point that opens the next uncompleted main-path
   step (query + top-k). Themed gold ring (AtlasMD 3.13 -- NEVER blue), pulsing
   to guide the eye. Cleared when the main path is complete (finalized). */
.plot .pt.next-step .pt-focus {
  opacity: 1;
  stroke: var(--c-accent-3);
  stroke-width: 2;
  stroke-dasharray: none;
  transform-box: fill-box;
  transform-origin: center;
  animation: ptNextPulse 1.8s var(--ease-1) infinite;
}
@keyframes ptNextPulse {
  0%, 100% { opacity: 0.55; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.18); }
}

/* ---- side rail (embed readout + kNN list + keyword-miss callout) ---- */
.vmap-rail { display: flex; flex-direction: column; gap: var(--sp-2); }
.vmap-rail .card {
  background: var(--c-surface);
  border: var(--bw-1) solid var(--c-border);
  border-radius: var(--radius-md);
  padding: var(--sp-2) 13px;
  box-shadow: var(--shadow-1);
}
.vmap-rail .card h2 {
  font-family: var(--font-ui);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 700;
  font-size: var(--fs-0);
  color: var(--c-text-muted);
  border-bottom: var(--bw-1) solid var(--c-border);
  padding-bottom: 6px;
  margin: 0 0 var(--sp-1);
}
.vmap-rail .qline { font-family: var(--font-body); font-size: var(--fs-2); font-style: italic; color: var(--c-text); margin: 0 0 var(--sp-1); }
.vmap-rail .vread {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--c-accent-1);
  background: var(--c-surface-2);
  border: var(--bw-1) solid var(--c-border);
  border-radius: var(--radius-sm);
  padding: 6px 8px;
  overflow-wrap: anywhere;
  line-height: 1.6;
  margin: 0;
}
.vmap-rail .vread .vlbl { color: var(--c-text-muted); }

/* didactic embed step: query text -> tokens -> vector */
.embed-step {
  font-family: var(--font-ui);
  font-size: 11px;
  color: var(--c-accent-2);
  margin: 0 0 6px;
  letter-spacing: 0.04em;
  min-height: 14px;
  transition: opacity 0.3s var(--ease-1);
}
.tokrow { display: flex; flex-wrap: wrap; gap: var(--sp-0); margin: 0 0 var(--sp-1); }
/* query-token chips for the vector-map animation. Scoped under .tokrow so this
   .tok never collides with base.css syntax-highlight .tok spans inside a
   .code-block figure (equal-specificity, later-loading override = bug). -- W6-FIX */
.tokrow .tok {
  font-family: var(--font-mono);
  font-size: 10.5px;
  background: var(--c-bg);
  border: var(--bw-1) solid var(--c-border);
  border-radius: var(--radius-sm);
  padding: 1px 6px;
  color: var(--c-accent-1);
  opacity: 0;
  transform: translateY(3px);
  transition: opacity 0.25s var(--ease-1), transform 0.25s var(--ease-1);
}
.tokrow .tok.on { opacity: 1; transform: translateY(0); }
.qvec { caret-color: transparent; }
.qvec.computing::after { content: "\258c"; color: var(--c-accent-2); animation: vmapCurs 0.8s steps(1) infinite; }
@keyframes vmapCurs { 50% { opacity: 0; } }

.vmap-rail .meta { font-family: var(--font-ui); font-size: 11.5px; color: var(--c-heading); margin: var(--sp-1) 0 0; line-height: 1.55; }
.vmap-rail .meta b { color: var(--c-text); }

/* ---- plate-head eyebrow label (token-driven; replaces the duplicated inline
   style on .eyebrow so the HTML agent can drop style="..."). ASCII only. ---- */
.eyebrow {
  font-family: var(--font-ui);
  font-size: var(--fs-0);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-text-muted);
  margin: 0 0 4px;
}

/* ---- no-JS static fallback cards (.no-js-only schematic). Mirror the rail
   .card look but live OUTSIDE .vmap-rail, so they get their own token-driven
   rules; the HTML agent removes the inline style="..." blobs once these land. */
.no-js-only .card {
  background: var(--c-surface);
  border: var(--bw-1) solid var(--c-border);
  border-radius: var(--radius-md);
  padding: var(--sp-2) 13px;
  box-shadow: var(--shadow-1);
  max-width: 760px;
  margin: var(--sp-3) auto 0;
}
.no-js-only .card + .card { margin-top: var(--sp-2); }
.no-js-only .card h2 {
  font-family: var(--font-ui);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: var(--fw-bold);
  font-size: var(--fs-0);
  color: var(--c-text-muted);
  border-bottom: var(--bw-1) solid var(--c-border);
  padding-bottom: 6px;
  margin: 0 0 var(--sp-1);
}
.no-js-only .card .qline {
  font-family: var(--font-body);
  font-style: italic;
  font-size: var(--fs-2);
  color: var(--c-text);
  margin: 0;
}
.no-js-only .card .meta {
  font-family: var(--font-ui);
  font-size: 11.5px;
  color: var(--c-heading);
  margin-top: var(--sp-1);
  line-height: 1.55;
}
.kbadge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  background: var(--c-progress);
  color: var(--c-bg);
  border-radius: var(--radius-sm);
  padding: 1px 6px;
  margin-left: 2px;
}

/* k-NN ranked list */
.ranklist { list-style: none; margin: var(--sp-1) 0 0; padding: 0; font-family: var(--font-ui); font-size: 11.5px; }
.ranklist li {
  display: flex;
  align-items: baseline;
  gap: var(--sp-1);
  padding: 5px 0;
  border-bottom: var(--bw-1) dotted var(--c-border);
  opacity: 0;
  transform: translateX(6px);
  transition: opacity 0.35s var(--ease-1), transform 0.35s var(--ease-1);
}
.ranklist li.shown { opacity: 1; transform: translateX(0); }
.ranklist li:last-child { border-bottom: none; }
.rk { font-family: var(--font-mono); font-size: 10px; color: var(--c-text-muted); flex: 0 0 auto; width: 18px; }
.rtxt { flex: 1 1 auto; color: var(--c-text); overflow-wrap: anywhere; }
.rcos { font-family: var(--font-mono); font-size: 11px; flex: 0 0 auto; }
.ranklist li.near .rcos { color: var(--green-text); font-weight: 700; }
.ranklist li.far .rcos { color: var(--c-text-muted); }
.ranklist li.far .rtxt { color: var(--c-text-muted); }

/* ---- explicit no-JS class hooks (replace removed inline styles). Token-driven
   and tag/structure-agnostic so they survive heading-tag changes. The static
   card markup carries class="card static-card"; these key off the new classes
   so the styling no longer depends on the .no-js-only .card descendant chain.
   .ranklist--static is LOAD-BEARING: the live .ranklist li starts at opacity:0
   (revealed by JS adding .shown); without JS the static list must force its
   rows visible. ---- */
.static-card {
  max-width: 760px;
  margin: var(--sp-3) auto 0;
}
.static-card__head {
  font-family: var(--font-ui);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: var(--fw-bold);
  font-size: var(--fs-0);
  color: var(--c-text-muted);
  border-bottom: var(--bw-1) solid var(--c-border);
  padding-bottom: 6px;
  margin: 0 0 var(--sp-1);
}
.qline {
  font-family: var(--font-body);
  font-style: italic;
  font-size: var(--fs-2);
  color: var(--c-text);
  margin: 0;
}
.static-card__meta {
  font-family: var(--font-ui);
  font-size: 11.5px;
  color: var(--c-heading);
  margin-top: var(--sp-1);
  line-height: 1.55;
}
.ranklist--static li { opacity: 1; transform: none; }
.cut {
  font-family: var(--font-ui);
  font-size: 10px;
  color: var(--c-accent-2);
  text-align: center;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin: 2px 0;
  position: relative;
}
.cut::before, .cut::after { content: ""; position: absolute; top: 50%; width: 24%; height: 1px; background: var(--c-accent-2); opacity: 0.5; }
.cut::before { left: 0; }
.cut::after { right: 0; }

/* keyword-miss callout (the no-shared-keyword demo) */
.callout {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.35), rgba(0, 0, 0, 0.012)),
    var(--c-surface);
  border: var(--bw-1) solid var(--c-accent-2);
  border-left: 4px solid var(--c-accent-2);
  border-radius: var(--radius-md);
  padding: 11px 13px;
  box-shadow: var(--shadow-1);
}
.callout .ctag { font-family: var(--font-ui); font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--c-accent-2); font-weight: 700; margin: 0 0 5px; }
.callout p { margin: 0; font-size: 13px; color: var(--c-text); font-style: italic; }
.callout .cw { color: var(--c-accent-2); font-style: normal; font-weight: 700; }
.callout .cg { color: var(--green-text); font-style: normal; font-weight: 700; }

/* ---- scale bar + legend under the plot ---- */
.scalebar { display: flex; align-items: center; gap: 10px; margin-top: 10px; font-family: var(--font-ui); font-size: 10px; color: var(--c-text-muted); flex-wrap: wrap; }
.sb-track { display: flex; align-items: stretch; height: 9px; border: var(--bw-1) solid var(--c-heading); border-radius: 2px; overflow: hidden; }
.sb-seg { width: 30px; }
.sb-seg.a { background: var(--c-progress); }
.sb-seg.b { background: var(--c-surface-2); }
.sb-seg.c { background: var(--c-text-muted); }
.sb-seg.d { background: var(--c-heading); }
.sb-cap { letter-spacing: 0.06em; }
.vmap-legend { display: flex; gap: 14px; flex-wrap: wrap; margin-left: auto; }
.lg { display: inline-flex; align-items: center; gap: 5px; }
.lg .sw { width: 11px; height: 11px; border-radius: 50%; border: var(--bw-1) solid var(--c-heading); }
.lg .sw.g { background: var(--c-progress); }
.lg .sw.r { background: var(--c-surface-2); }

/* ===========================================================
   DRILL CARD blocks (rendered into the base.css .detail-panel shell).
   The panel grows the plot frame to fit (plate.growToFit) -- no scroll-jail.
   =========================================================== */
.detail-panel.vmap-card {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  z-index: 4;
  max-width: none;
  margin: 0;
  padding: var(--sp-3) 18px;
}
/* drilldown-zoom toggles .zoomed on the stage (the plot svg) when a card is
   open -- hide the static plot so the grown panel owns the frame area */
.plot.zoomed { visibility: hidden; }

.vmap-card__head { margin: 0 0 var(--sp-2); }
.vmap-card__kicker { font-family: var(--font-ui); font-size: 10px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--c-text-muted); margin: 0 0 4px; }
.vmap-card__title { font-family: var(--font-body); font-size: var(--fs-3); margin: 0 0 4px; color: var(--c-heading); font-weight: var(--fw-bold); }
.vmap-card__title:focus, .vmap-card__title:focus-visible { outline: none; }
.vmap-card__src { font-family: var(--font-ui); font-size: 11px; color: var(--c-accent-1); margin: 0 0 var(--sp-2); }
.vmap-card__note { font-family: var(--font-ui); font-size: 12px; color: var(--c-heading); margin: var(--sp-1) 0 0; line-height: 1.55; }
.vmap-card__note b { color: var(--c-text); }

.vmap-card .chunk-text {
  font-family: var(--font-body);
  font-size: var(--fs-2);
  line-height: 1.6;
  color: var(--c-text);
  background: var(--c-bg);
  border: var(--bw-1) solid var(--c-border);
  border-radius: 4px;
  padding: 12px 14px;
  margin: 0 0 var(--sp-2);
  overflow-wrap: anywhere;
}
.vmap-card .chunk-text mark { background: rgba(23, 166, 115, 0.22); color: var(--green-text); padding: 0 2px; border-radius: 2px; }

.vmap-card .vread {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--c-accent-1);
  background: var(--c-surface-2);
  border: var(--bw-1) solid var(--c-border);
  border-radius: var(--radius-sm);
  padding: 6px 8px;
  overflow-wrap: anywhere;
  line-height: 1.6;
  margin: 0 0 var(--sp-2);
}
.vmap-card .vread .vlbl { color: var(--c-text-muted); }

.vmap-card .factrow { display: flex; gap: 18px; flex-wrap: wrap; margin: 0 0 var(--sp-2); font-family: var(--font-ui); font-size: 12px; }
.vmap-card .fact { display: flex; flex-direction: column; gap: 1px; }
.vmap-card .fact .fl { font-size: 10px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--c-text-muted); }
.vmap-card .fact .fv { font-family: var(--font-mono); font-size: var(--fs-2); color: var(--c-text); font-weight: 700; }
.vmap-card .fact .fv.g { color: var(--green-text); }
.vmap-card .fact .fv.r { color: var(--c-accent-2); }

/* top-k membership flag */
.topk-flag { display: inline-block; font-family: var(--font-ui); font-size: 10px; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; border-radius: var(--radius-sm); padding: 2px 8px; margin: 0 0 10px; }
.topk-flag.in { background: var(--c-progress); color: var(--c-bg); }
.topk-flag.out { background: var(--c-surface-2); color: var(--c-accent-2); border: var(--bw-1) solid var(--c-accent-2); }

/* why-not-top-k explanation (far points) */
.whyout {
  font-family: var(--font-ui);
  font-size: 12px;
  line-height: 1.55;
  color: var(--c-text);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.35), rgba(0, 0, 0, 0.012)),
    var(--c-surface);
  border: var(--bw-1) solid var(--c-accent-2);
  border-left: 4px solid var(--c-accent-2);
  border-radius: var(--radius-md);
  padding: 10px 12px;
  margin: 0 0 var(--sp-2);
}
.whyout .wlbl { display: block; font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--c-accent-2); font-weight: 700; margin: 0 0 4px; }
.whyout b { font-family: var(--font-mono); font-size: 11px; color: var(--c-accent-2); }

/* deeper (level-2) lens-plus target inside the card -- reuses base .deeper but
   the card lays it out as a block; keep >=44px tap target + themed focus */
.vmap-card .deeper {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  margin-top: var(--sp-2);
  border: var(--bw-1) dashed var(--c-border);
  border-radius: 4px;
  padding: 11px 12px;
  min-height: 44px;
  background: var(--c-bg);
  transition: background-color 0.3s var(--ease-1), border-color var(--dur-1) var(--ease-1);
}
.vmap-card .deeper:hover { background: var(--c-surface-2); border-color: var(--c-accent-3); }
.vmap-card .deeper:focus-visible { outline: var(--bw-2) solid var(--c-focus); outline-offset: 2px; }
.vmap-card .deeper .dlbl { font-family: var(--font-ui); font-size: 10px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--c-accent-2); font-weight: 700; display: flex; align-items: center; gap: 6px; }
.vmap-card .deeper .dlbl .lens-plus { flex: 0 0 auto; display: block; }
.vmap-card .deeper .dprev { font-family: var(--font-mono); font-size: 10.5px; color: var(--c-heading); margin: 0; overflow-wrap: anywhere; line-height: 1.5; }

.vmap-card .lines { font-family: var(--font-body); font-size: 14px; line-height: 1.7; margin: 0 0 var(--sp-2); padding-left: 16px; }
.vmap-card .lines li { margin: 2px 0; }
.vmap-card .lines li.hit { color: var(--green-text); font-weight: 600; }

/* ---- footnote strip ---- */
.vmap-foot { margin-top: 14px; padding: 10px var(--sp-1) 2px; border-top: var(--bw-1) solid var(--c-border); font-family: var(--font-ui); font-size: 11.5px; color: var(--c-heading); line-height: 1.6; }
.vmap-foot b { color: var(--c-text); }
.vmap-foot code { font-family: var(--font-mono); font-size: 11px; background: var(--c-surface-2); border: var(--bw-1) solid var(--c-border); border-radius: var(--radius-sm); padding: 0 4px; }

/* ===========================================================
   RESPONSIVE -- must hold at 390 AND 320 (legible point labels)
   =========================================================== */
@media (max-width: 760px) {
  .vmap-grid { grid-template-columns: 1fr; }
  /* SVG scales to ~0.55 of its 520-wide viewBox on a phone -- bump in-plot text
     well above desktop sizing so rendered labels stay legible */
  .plot .pt-lbl { font-size: 13px; }
  .plot .pt-cos { font-size: 12px; }
  .plot .ring-label { font-size: 10px; }
  .plot .axis-cap { font-size: 11px; }
  /* the kNN hit circle r is baked in SVG units (~22..26) on a 520-wide viewBox;
     at ~0.55x phone render that is < 44px. Bump the in-SVG hit r so every point
     tap target stays >= 44px rendered (mirrors vector-store.css). */
  .plot .pt-hit { r: 40px; }      /* ~44px+ rendered at phone scale */
  .vmap-rail { order: 2; }
  .vmap-legend { margin-left: 0; width: 100%; }
  .vmap-toolbar { gap: var(--sp-1); }
}

@media (max-width: 420px) {
  .plot .pt-lbl { font-size: 15px; }
  .plot .pt-cos { font-size: 13px; }
  .plot .ring-label { font-size: 11px; }
  .plot .axis-cap { font-size: 12px; }
  .plot .pt-hit { r: 46px; }      /* 320..420: keep >= 44px rendered */
  .detail-panel.vmap-card { padding: var(--sp-3) 13px; }
}

@media (max-width: 360px) {
  .plot .pt-lbl { font-size: 16px; }
  .plot .pt-cos { font-size: 14px; }
  .plot .pt-hit { r: 52px; }
}

/* reduced-motion: snap to the settled end state over the SAME DOM */
@media (prefers-reduced-motion: reduce) {
  .plot .vlink,
  .plot .dot,
  .plot .pt.doc,
  .plot .pt.query,
  .tokrow .tok,
  .ranklist li,
  .embed-step,
  .detail-panel.vmap-card { transition: none; }
  .plot .pt.doc { opacity: 1; transform: translate(0, 0); }
  .plot .pt.query { opacity: 1; }
  .tokrow .tok, .ranklist li { opacity: 1; transform: none; }
  .qvec.computing::after { animation: none; content: ""; }
}

/* ===========================================================
   CHAPTER PROSE  (ported manuscript -- S-SB-REPORT3)
   Full chapter text rendered as semantic article content.
   Structure + spacing only; color/space/motion via var(--...).
   Lives here (section file), never in base.css. ASCII only.
   The same block is mirrored inside .no-js-only so the chapter
   reads complete with JavaScript off.
   =========================================================== */
.chapter-prose {
  max-width: 72ch;
  margin: var(--sp-4) auto 0;
  padding: 0 var(--sp-2);
  font-family: var(--font-body);
  font-size: var(--fs-2);
  line-height: var(--lh-body);
  color: var(--c-text);
}
.chapter-prose > section { margin-top: var(--sp-4); }
.chapter-prose > section:first-child { margin-top: 0; }
.chapter-prose h2 {
  font-family: var(--font-body);
  font-weight: var(--fw-bold);
  font-size: var(--fs-3);
  line-height: var(--lh-tight);
  color: var(--c-heading);
  margin: 0 0 var(--sp-2);
  padding-bottom: var(--sp-1);
  border-bottom: var(--bw-1) solid var(--c-border);
}
.chapter-prose h3 {
  font-family: var(--font-body);
  font-weight: var(--fw-bold);
  font-size: var(--fs-2);
  color: var(--c-heading);
  margin: var(--sp-3) 0 var(--sp-1);
}
.chapter-prose p { margin: var(--sp-2) 0; }
.chapter-prose ul,
.chapter-prose ol { margin: var(--sp-2) 0; padding-left: 1.4em; }
.chapter-prose li { margin: var(--sp-1) 0; }
.chapter-prose a {
  color: var(--c-link);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.chapter-prose a:hover { color: var(--c-link-hover); }
.chapter-prose a:focus-visible { outline: var(--bw-2) solid var(--c-focus); outline-offset: 2px; }
.chapter-prose strong,
.chapter-prose b { font-weight: var(--fw-bold); color: var(--c-heading); }
.chapter-prose code {
  font-family: var(--font-mono);
  font-size: 0.92em;
  background: var(--c-accent-3-soft);
  border: var(--bw-1) solid var(--c-border);
  border-radius: var(--radius-sm);
  padding: 0.05em 0.34em;
}
.chapter-prose pre {
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.6;
  background: var(--c-code-plate-bg);
  color: var(--c-code-plate-fg);
  border: var(--bw-1) solid var(--c-heading);
  border-radius: var(--radius-md);
  padding: var(--sp-2) var(--sp-3);
  margin: var(--sp-2) 0;
  overflow: auto;
  white-space: pre;
}
.chapter-prose pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: inherit;
  color: inherit;
}
.chapter-prose .sources,
.chapter-prose .about-recipe { font-size: var(--fs-1); }
.chapter-prose .sources a,
.chapter-prose .about-recipe a { word-break: break-word; overflow-wrap: anywhere; }
.chapter-prose .next-stop {
  border-left: 3px solid var(--c-accent-1);
  background: var(--c-accent-1-soft);
  border-radius: var(--radius-md);
  padding: var(--sp-2) var(--sp-3);
}
@media (max-width: 560px) {
  .chapter-prose { font-size: var(--fs-1); }
  .chapter-prose pre { font-size: 11.5px; }
}