/*
 * sections/what-rag.css -- section-specific structural CSS for the
 * "Что такое RAG" pipeline page. Linked ONLY by what-rag.html.
 *
 * base.css owns the shared shells (.plate, .breadcrumb, .zoomout/.drill,
 * .progress-strip, .node, .compass) -- this file adds ONLY what the pipeline
 * section needs beyond those shells and NEVER forks base.css:
 *   - the 7-column nodes-grid + the pipeline node-card center layout
 *     (base .node is the generic block form; the pipeline form is centered)
 *   - the SVG spine (edge-base / edge-draw one-shot draw-in / edge-prog green)
 *   - the zoom camera stage collapse (.stage.zoomed .camera) + graticule
 *   - the inline-grow detail panes + their content blocks (readout / ranklist /
 *     cards / prompt / budget / answer) + the transform/opacity-only didactic
 *     animations (embed text->tokens->vector; cosine bars; prompt assembly)
 *   - the earned-green node extras (check glyph, "вы здесь" tag, .done)
 *
 * Color/space/motion come via var(--...) from themes/atlas.css. The only
 * literal hex used are the AtlasMD-2.1 FROZEN values that have no token (the
 * dark prompt block + green-surface answer tints + token chip bg) -- these are
 * section-local, never added to base.css. ASCII only.
 */

/* ---- pipeline diagram (level 0) --------------------------------------- */
.pipeline { position: relative; padding: var(--sp-0) 2px 2px; }
.svg-flow { display: block; width: 100%; height: auto; }
.edge-base { stroke: var(--c-border); stroke-width: 2; fill: none; }
/* one-time quiet draw-in of the spine; no traveling marker, no loop */
.edge-draw {
  stroke: var(--c-text-muted);
  stroke-width: 2.4;
  fill: none;
  stroke-linecap: round;
  opacity: 0.55;
  transition: stroke-dashoffset 1100ms var(--ease-zoom);
}
.edge-draw.drawn { stroke-dashoffset: 0; }
/* proportional green progress spine */
.edge-prog {
  stroke: var(--c-progress);
  stroke-width: 2.6;
  fill: none;
  stroke-linecap: round;
  transition: stroke-dashoffset var(--dur-2) var(--ease-zoom);
}

.nodes-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
  margin-top: -4px;
  position: relative;
  z-index: 2;
}

/* the pipeline node-card is the centered form of the base .node shell */
.nodes-grid .node {
  text-align: center;
  min-height: 64px;
  padding: 9px 6px 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
}
.nodes-grid .node .idx {
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-accent-3-text);
}
.nodes-grid .node .name { margin-top: 0; line-height: 1.22; }
.nodes-grid .node .hint { margin-top: 0; }

/* earned-green extras (base.css supplies the .visited bg/ring) */
.nodes-grid .node { position: relative; }
.nodes-grid .node .here {
  display: none;
  position: absolute;
  top: 3px;
  left: 6px;
  font-family: var(--font-ui);
  font-size: 8px;
  font-weight: var(--fw-bold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-accent-2);
}
.nodes-grid .node.current .here { display: block; }
.nodes-grid .node.current .idx { color: var(--c-accent-2); }
.nodes-grid .node.visited .idx { color: var(--c-accent-1); }
.nodes-grid .node.visited::after {
  content: "\2713";
  position: absolute;
  top: 4px;
  right: 6px;
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: var(--fw-bold);
  line-height: 1;
  color: var(--c-progress);
}
.nodes-grid.done .node {
  border-color: var(--c-progress);
  background: linear-gradient(180deg, var(--c-visited-bg-1), var(--c-visited-bg-2));
}

/* ---- the camera stage (drilldown-zoom toggles .zoomed on the stage) ---- */
.stage { position: relative; border-radius: var(--radius-md); }
.camera {
  position: relative;
  transition: transform var(--dur-zoom) var(--ease-zoom);
  transform-origin: 0 0;
  will-change: transform;
}
/* when a detail pane is open the level-0 pipeline collapses out of flow so the
   stage grows to fit the ACTIVE pane (no frozen short height, no clip) */
.stage.zoomed .camera {
  position: absolute;
  inset: 0;
  height: 0;
  overflow: hidden;
  visibility: hidden;
  pointer-events: none;
}
.graticule { position: absolute; inset: 0; pointer-events: none; z-index: 0; opacity: 0.5; }

/* controls row: breadcrumb + zoom-out share a row (NO compass here) */
.pipeline-controls {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  flex-wrap: wrap;
  padding: 0 var(--sp-0) var(--sp-1);
  margin-bottom: 2px;
  border-bottom: var(--bw-1) solid var(--c-border);
}
.pipeline-controls .breadcrumb { flex: 1 1 auto; min-width: 0; }

/* ---- detail panes (inline-grow zoom levels) --------------------------- */
.detail {
  display: none;
  position: relative;
  z-index: 5;
  background:
    radial-gradient(circle at 50% 30%, rgba(247,239,220,0.6) 0, rgba(232,220,192,0) 75%),
    linear-gradient(180deg, rgba(255,255,255,0.28), rgba(0,0,0,0.012)),
    var(--c-surface);
  border: 1.5px solid var(--c-heading);
  border-radius: var(--radius-md);
  padding: var(--sp-3) var(--sp-3) 14px;
  opacity: 0;
  transform: scale(1.02);
  transition: opacity 380ms var(--ease-1), transform 380ms var(--ease-1);
}
.detail.show { display: block; opacity: 1; transform: scale(1); }
.detail h2 {
  font-family: var(--font-body);
  font-weight: var(--fw-bold);
  font-size: 18px;
  margin: 0 0 2px;
  color: var(--c-text);
}
/* heading is a programmatic focus target; suppress UA ring, keep SR focus */
.detail h2:focus,
.detail h2:focus-visible { outline: none; }
.detail .tag {
  font-family: var(--font-ui);
  font-size: var(--fs-0);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-accent-2);
  margin: 0 0 10px;
}
.detail p {
  font-family: var(--font-ui);
  font-size: 13px;
  line-height: 1.55;
  color: var(--c-heading);
  margin: var(--sp-1) 0;
}
.detail .note {
  font-family: var(--font-ui);
  font-size: 11.5px;
  color: var(--c-text-muted);
  font-style: italic;
  border-left: var(--bw-2) solid var(--c-border);
  padding-left: 9px;
  margin-top: var(--sp-2);
}

/* inline lens-plus drill button text label (base.css styles .drill chrome) */
.detail .drill { margin-top: var(--sp-2); border-style: dashed; border-color: var(--c-accent-1); color: var(--c-link); }
.detail .drill:hover { color: var(--c-link-hover); border-color: var(--c-link-hover); }

/* readouts */
.readout {
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  background: var(--c-accent-3-soft);
  border: var(--bw-1) solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 9px 11px;
  color: var(--c-text);
  word-break: break-word;
  overflow-wrap: anywhere;
  box-shadow: var(--shadow-sheen);
  margin-top: var(--sp-1);
}
.readout .lbl {
  display: block;
  font-family: var(--font-ui);
  font-size: 9.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-text-muted);
  margin-bottom: 4px;
}
.readout .num { color: var(--c-accent-1); }

/* ranked candidate list (cosine bars + top-k) */
.ranklist { list-style: none; margin: var(--sp-1) 0 0; padding: 0; display: flex; flex-direction: column; gap: 5px; }
.ranklist li {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-ui);
  font-size: 12.5px;
  color: var(--c-text);
  background: var(--c-accent-3-soft);
  border: var(--bw-1) solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 6px 10px;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.34s var(--ease-1), transform 0.34s var(--ease-1),
              border-color var(--dur-2) var(--ease-1), background var(--dur-2) var(--ease-1);
}
.ranklist.run li { opacity: 1; transform: none; }
.ranklist .chunk { font-family: var(--font-mono); font-size: 12px; color: var(--c-heading); }
.ranklist .cos { margin-left: auto; font-family: var(--font-mono); font-size: 12px; color: var(--c-accent-1); font-weight: var(--fw-bold); }
.ranklist .barwrap { flex: 1 1 60px; height: 6px; background: var(--c-surface-3); border-radius: 3px; overflow: hidden; min-width: 40px; }
.ranklist .barfill { height: 100%; width: 0; background: var(--c-progress); border-radius: 3px; transition: width 760ms var(--ease-zoom); }
.ranklist li.topk { border-color: var(--c-progress); background: var(--c-visited-bg-1); }
.ranklist li.topk .cos { color: var(--c-progress); }

/* chunk cards (top-k) */
.cards { display: flex; flex-direction: column; gap: var(--sp-1); margin-top: var(--sp-1); }
.ccard {
  background: var(--c-accent-3-soft);
  border: var(--bw-1) solid var(--c-border);
  border-left: 3px solid var(--c-accent-1);
  border-radius: var(--radius-md);
  padding: 8px 11px;
}
.ccard .src { font-family: var(--font-mono); font-size: 11px; color: var(--c-accent-2); margin-bottom: 3px; }
.ccard .txt { font-family: var(--font-body); font-size: 13px; line-height: 1.45; color: var(--c-text); }

/* prompt block (dark plate -- AtlasMD-2.1 frozen literals, no token exists) */
.prompt {
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: anywhere;
  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: 11px 12px;
  overflow: auto;
}
.prompt .sys { color: var(--c-accent-3); }
.prompt .ctx { color: var(--c-code-ctx); }
.prompt .q { color: var(--c-code-q); }
.prompt .ctx-line { display: block; opacity: 0; transform: translateY(-8px); transition: opacity 0.4s var(--ease-1), transform 0.4s cubic-bezier(0.34,1.3,0.5,1); }
.assemble.run .prompt .ctx-line { opacity: 1; transform: none; }
.budget {
  font-family: var(--font-ui);
  font-size: 11.5px;
  color: var(--c-text-muted);
  margin-top: var(--sp-1);
  display: flex;
  align-items: center;
  gap: var(--sp-1);
  flex-wrap: wrap;
}
.budget .meter { flex: 1 1 100px; min-width: 80px; max-width: 160px; height: 7px; background: var(--c-surface-3); border-radius: 4px; overflow: hidden; }
.budget .meter i { display: block; height: 100%; width: 0; background: var(--c-accent-1); border-radius: 4px; transition: width 900ms var(--ease-zoom); }
.budget b { color: var(--c-accent-1); font-family: var(--font-mono); font-weight: var(--fw-bold); }

/* answer block (grounded -- green-surface frozen tints, no token) */
.answer {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.55;
  color: var(--c-text);
  background: var(--c-visited-bg-1);
  border: var(--bw-1) solid var(--c-answer-border);
  border-left: 3px solid var(--c-progress);
  border-radius: var(--radius-md);
  padding: 11px 13px;
}
.answer cite {
  font-style: normal;
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: var(--fw-bold);
  color: var(--c-bg);
  background: var(--c-accent-1);
  border-radius: var(--radius-sm);
  padding: 0 4px;
  margin: 0 1px;
  vertical-align: 1px;
}

/* ---- didactic: эмбеддинг text -> tokens -> vector --------------------- */
.embed-anim { margin: var(--sp-1) 0 4px; }
.embed-stage {
  font-family: var(--font-ui);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-text-muted);
  margin: 0 0 6px;
}
.embed-stage + .embed-text,
.embed-stage + .embed-tokens,
.embed-stage + .embed-vec { margin-top: 0; }
.embed-anim .embed-stage:not(:first-child) { margin-top: var(--sp-2); }
.embed-text {
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--c-text);
  background: var(--c-accent-3-soft);
  border: var(--bw-1) solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 8px 11px;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.4s var(--ease-1), transform 0.4s var(--ease-1);
}
.embed-anim.run .embed-text { opacity: 1; transform: none; }
.embed-tokens { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 9px; }
/* word-token chips for the embed animation. Scoped under .embed-tokens 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 */
.embed-tokens .tok {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-text);
  background: var(--c-surface);
  border: var(--bw-1) solid var(--c-border);
  border-radius: 4px;
  padding: 3px 7px;
  opacity: 0;
  transform: translateY(-7px) scale(0.85);
  transition: opacity 0.34s var(--ease-1), transform 0.34s cubic-bezier(0.34,1.4,0.5,1);
}
.embed-anim.run .embed-tokens .tok { opacity: 1; transform: none; }
.embed-vec {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  margin-top: 10px;
  background: var(--c-accent-3-soft);
  border: var(--bw-1) solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 9px 11px;
  color: var(--c-text);
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-1);
  align-items: baseline;
}
.embed-vec .vlbl {
  flex: 1 0 100%;
  font-family: var(--font-ui);
  font-size: 9.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-text-muted);
  margin-bottom: 2px;
}
.vnum {
  color: var(--c-accent-1);
  font-weight: var(--fw-bold);
  min-width: 46px;
  text-align: right;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.3s var(--ease-1), transform 0.3s var(--ease-1);
}
.embed-anim.run .vnum.in { opacity: 1; transform: none; }
.vellip { color: var(--c-text-muted); opacity: 0; transition: opacity 0.3s var(--ease-1); }
.embed-anim.run .vellip.in { opacity: 0.8; }

/* reduced-motion static stepper hint (shown only under reduce) */
.rm-only { display: none; }

/* corner L-ticks inside the plate (decorative) */
.corner { position: absolute; width: 16px; height: 16px; pointer-events: none; z-index: 2; opacity: 0.7; }
.corner svg { display: block; }
.corner.tl { top: 11px; left: 11px; }
.corner.tr { top: 11px; right: 11px; transform: scaleX(-1); }
.corner.bl { bottom: 11px; left: 11px; transform: scaleY(-1); }
.corner.br { bottom: 11px; right: 11px; transform: scale(-1, -1); }

/* ---- responsive: hold at 390 / 320 ----------------------------------- */
@media (max-width: 680px) {
  .nodes-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .detail { padding: var(--sp-3) 14px 14px; }
  .detail h2 { font-size: 1.04rem; }
  .ranklist li,
  .ccard .txt,
  .answer { font-size: 12.5px; }
}

/* reduced-motion: snap to end state over the SAME DOM */
@media (prefers-reduced-motion: reduce) {
  .edge-draw { transition: none !important; stroke-dashoffset: 0 !important; }
  .edge-prog,
  .ranklist .barfill,
  .budget .meter i,
  .detail,
  .embed-text,
  .embed-tokens .tok,
  .vnum,
  .vellip,
  .ranklist li,
  .prompt .ctx-line { transition: none !important; }
  .rm-only {
    display: block;
    font-family: var(--font-ui);
    font-size: 11px;
    color: var(--c-text-muted);
    margin-top: 10px;
  }
}

/* ===========================================================
   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; }
}