/* ===========================================================
   assemble-context.css -- SECTION CSS for "Сборка контекста"
   (the template-fill + token-budget drill -- AtlasMD).

   Scope: ONLY the assemble-context drill blocks that base.css does not ship as
   shared shells: the level-0 overview node, the context-assembly.js panel
   (.ca-root + controls + pool + prompt + counter), the timeline controls
   (rendered by timeline.js as .timeline*/.btn), and the no-JS static schematic.
   It reuses base.css shells where they exist: .plate / .plate-head / .compass,
   .breadcrumb, .zoomout, .node, .stage / .camera, .progress-strip,
   .site-header / .site-footer, .chapter-prose.

   base.css is NEVER edited or forked. Every color/space/motion value here comes
   from a theme token (var(--...)); selection/focus uses the themed rust ring
   (--c-focus), NEVER the default blue.

   MOTION RULE (do-not #5, HARD): animate transform + opacity ONLY. The trim
   collapse on .ca-chunk[data-trimmed="true"] SNAPS - there is NO height /
   max-height transition anywhere in this file. Trim is shown via opacity only.
   =========================================================== */

/* ---- controls row: breadcrumb + zoom-out (own row, NOT the compass row) ---- */
.drill-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);
}
.drill-controls .breadcrumb { flex: 1 1 auto; min-width: 0; }
/* zoom-out moved to the shared top-right card position (base.css .plate > .zoomout) */

/* ---- the camera stage + level-0 overview node ---- */
.stage { position: relative; border-radius: var(--radius-md); }
.camera {
  position: relative;
  transition: transform var(--dur-zoom) var(--ease-zoom);
  transform-origin: 0 0;
}
/* when the panel is open, collapse the level-0 overview 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;
}
.ca-overview {
  display: flex;
  justify-content: center;
  padding: var(--sp-3) 0;
}
.ca-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  text-align: center;
  max-width: 360px;
  cursor: pointer;
}
.ca-node .idx {
  font-family: var(--font-mono);
  font-size: var(--fs-0);
  color: var(--c-accent-2);
  letter-spacing: 0.1em;
}
.ca-node .name { font-weight: var(--fw-bold); font-size: var(--fs-2); color: var(--c-text); }
.ca-node .hint { font-family: var(--font-ui); font-size: var(--fs-0); color: var(--c-text-muted); }
.ca-node .ca-open {
  margin-top: 6px;
  font-family: var(--font-ui);
  font-size: var(--fs-0);
  color: var(--c-link);
  border-top: var(--bw-1) dashed var(--c-accent-1);
  padding-top: 6px;
}

/* ===========================================================
   context-assembly.js panel content (.ca-root)
   =========================================================== */
.ca-root { display: flex; flex-direction: column; gap: var(--sp-2); }
.ca-title {
  font-family: var(--font-body);
  font-weight: var(--fw-bold);
  font-size: var(--fs-2);
  margin: 0;
  color: var(--c-text);
}
.ca-title:focus, .ca-title:focus-visible { outline: none; }

/* ---- controls (budget slider + order toggle) ---- */
.ca-controls {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
  align-items: flex-end;
  padding: var(--sp-1) 0;
  border-bottom: var(--bw-1) solid var(--c-border-soft);
}
.ca-budget { display: flex; flex-direction: column; gap: 4px; }
.ca-ctl-label {
  font-family: var(--font-ui);
  font-size: var(--fs-0);
  letter-spacing: 0.06em;
  color: var(--c-text-muted);
}
.ca-slider { width: 180px; max-width: 100%; accent-color: var(--c-accent-1); cursor: pointer; }
.ca-slider:focus-visible { outline: var(--bw-2) solid var(--c-focus); outline-offset: 3px; }
.ca-slider-val { font-family: var(--font-mono); font-size: var(--fs-1); color: var(--c-accent-1); font-weight: var(--fw-bold); }

.ca-order { display: flex; flex-direction: column; gap: 4px; }
.ca-order-btn {
  font-family: var(--font-ui);
  font-size: var(--fs-1);
  padding: 5px 11px;
  border: var(--bw-1) solid var(--c-accent-3);
  background: var(--c-surface);
  color: var(--c-text);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--dur-1) var(--ease-1), color var(--dur-1) var(--ease-1), border-color var(--dur-1) var(--ease-1);
}
.ca-order .ca-ctl-label + .ca-order-btn { margin-top: 2px; }
.ca-order-btn + .ca-order-btn { margin-top: 4px; }
.ca-order-btn:hover { border-color: var(--c-accent-2); color: var(--c-accent-2); }
.ca-order-btn:focus-visible { outline: var(--bw-2) solid var(--c-focus); outline-offset: 2px; }
.ca-order-btn[aria-pressed="true"] { background: var(--c-accent-2); border-color: var(--c-accent-2); color: var(--c-bg); }

/* ---- stage: pool of ranked chunks + the prompt template ---- */
.ca-stage {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-3);
  align-items: start;
}
.ca-pool { display: flex; flex-direction: column; gap: var(--sp-1); min-width: 0; }

/* chunk rows -- the trimmed collapse SNAPS (NO height/max-height transition). */
.ca-chunk {
  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: 7px 10px;
  /* IE sets inline transition for opacity/transform ONLY; we add none here. */
}
.ca-chunk[data-state="kept"] { border-left-color: var(--c-progress); }
.ca-chunk[data-state="over"] { border-left-color: var(--c-text-muted); }
/* TRIM: collapse via opacity; height SNAPS instantly - no height transition. */
.ca-chunk[data-trimmed="true"] {
  opacity: 0;
  height: 0;
  min-height: 0;
  padding-top: 0;
  padding-bottom: 0;
  margin: 0;
  border-width: 0;
  overflow: hidden;
  pointer-events: none;
  /* deliberately NO transition on height/padding/border -- instant snap. */
}
.ca-chunk-head { display: flex; flex-wrap: wrap; gap: var(--sp-1); align-items: baseline; }
.ca-chunk-src { font-family: var(--font-mono); font-size: var(--fs-0); color: var(--c-accent-2); }
.ca-chunk-score { font-family: var(--font-mono); font-size: var(--fs-0); color: var(--c-accent-1); }
.ca-chunk-tok { font-family: var(--font-mono); font-size: var(--fs-0); color: var(--c-text-muted); margin-left: auto; }
.ca-chunk-text { font-family: var(--font-body); font-size: var(--fs-1); line-height: var(--lh-body); color: var(--c-text); margin: 4px 0 0; }
.ca-dup-badge {
  display: inline-block;
  margin-top: 5px;
  font-family: var(--font-ui);
  font-size: var(--fs-0);
  color: var(--c-accent-2);
  border: var(--bw-1) solid var(--c-accent-2);
  border-radius: var(--radius-sm);
  padding: 1px 6px;
}
.ca-chunk[data-dup="true"] { border-left-color: var(--c-accent-2); }

/* ---- the prompt template being filled (dark plate; frozen literals - no token) ---- */
.ca-prompt {
  font-family: var(--font-mono);
  font-size: 11.5px;
  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: 11px 12px;
  word-break: break-word;
  overflow-wrap: anywhere;
  min-width: 0;
}
.ca-line { margin: 0 0 4px; }
.ca-line--sys { color: var(--c-accent-3); }
.ca-line--ctx-label { color: var(--c-code-ctx); margin-top: 6px; }
.ca-ctx-lines { display: block; }
.ca-line--ctx {
  color: var(--c-code-ctx);
  display: block;
  margin: 0 0 4px;
  /* IE sets opacity/transform transition inline; default hidden until filled. */
}
.ca-line--ctx[data-filled="false"] { opacity: 0; }
.ca-line--ctx[data-filled="true"] { opacity: 1; }
.ca-line--q { color: var(--c-code-q); margin-top: 6px; }
.ca-line--a { color: var(--c-code-plate-fg); }
.ca-trimmed { color: var(--c-accent-3); font-style: italic; margin: 6px 0 0; }

/* ---- live token counter (mono readout) ---- */
.ca-counter {
  font-family: var(--font-mono);
  font-size: var(--fs-1);
  color: var(--c-text);
  background: var(--c-accent-1-soft);
  border: var(--bw-1) solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 7px 11px;
}

/* ===========================================================
   timeline controls (timeline.js builds .timeline + children)
   =========================================================== */
.timeline { display: flex; flex-direction: column; gap: var(--sp-1); margin-top: var(--sp-1); }
.timeline__controls { display: flex; align-items: center; gap: var(--sp-1); flex-wrap: wrap; }
.timeline .btn {
  font-family: var(--font-ui);
  font-size: var(--fs-1);
  padding: 4px 12px;
  border: var(--bw-1) solid var(--c-accent-3);
  background: var(--c-surface);
  color: var(--c-text);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--dur-1) var(--ease-1), color var(--dur-1) var(--ease-1), border-color var(--dur-1) var(--ease-1);
}
.timeline .btn:hover { border-color: var(--c-accent-2); color: var(--c-accent-2); }
.timeline .btn:focus-visible { outline: var(--bw-2) solid var(--c-focus); outline-offset: 2px; }
.timeline .btn[aria-pressed="true"] { background: var(--c-accent-2); border-color: var(--c-accent-2); color: var(--c-bg); }
.timeline__scrub { flex: 1 1 120px; min-width: 90px; accent-color: var(--c-accent-1); cursor: pointer; }
.timeline__scrub:focus-visible { outline: var(--bw-2) solid var(--c-focus); outline-offset: 3px; }
.timeline__track { flex: 1 1 100%; height: 5px; background: var(--c-surface-3); border-radius: 3px; overflow: hidden; }
.timeline__progress { display: block; block-size: 100%; inline-size: 0; background: linear-gradient(90deg, var(--c-accent-3), var(--c-accent-2)); transition: inline-size var(--dur-2) var(--ease-1); }
.timeline__caption { font-family: var(--font-ui); font-size: var(--fs-1); color: var(--c-text-muted); margin: 0; }

/* ===========================================================
   NO-JS static schematic
   =========================================================== */
.ca-steps-static {
  margin: 0 0 var(--sp-3);
  padding-left: 1.3em;
  font-family: var(--font-ui);
  font-size: var(--fs-1);
  line-height: var(--lh-body);
  color: var(--c-text);
}
.ca-steps-static li { margin-bottom: 6px; }
.ca-steps-static b { color: var(--c-accent-2); }
.ca-prompt-static {
  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;
}

/* ===========================================================
   responsive: stack the stage columns on narrow viewports (390/320)
   =========================================================== */
@media (max-width: 640px) {
  .ca-stage { grid-template-columns: 1fr; }
  .ca-slider { width: 100%; }
}
@media (max-width: 360px) {
  .ca-controls { gap: var(--sp-2); }
  .ca-chunk-tok { margin-left: 0; }
}

/* in-prose links get the themed focus ring -- never the UA blue default
   (AtlasMD do-not: focus ring is always themed --c-focus). */
.chapter-prose a:focus-visible { outline: var(--bw-2) solid var(--c-focus); outline-offset: 2px; }

/* ===========================================================
   CHAPTER PROSE -- inline-code + pre x-overflow guard (390/320)
   Long unbroken inline <code> (file paths, dotted identifiers, URLs) must
   wrap instead of forcing the page wider than the viewport; <pre> code
   blocks scroll inside their own box. Color/space/motion via var(--...);
   the dark code-plate hex is the AtlasMD-2.1 frozen exemption. ASCII only.
   =========================================================== */
.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;
  overflow-wrap: anywhere;
  word-break: break-word;
}
.chapter-prose pre {
  max-width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.chapter-prose pre code {
  background: none;
  border: none;
  padding: 0;
  overflow-wrap: normal;
  word-break: normal;
  white-space: pre;
}

/* reduced-motion: timeline.js snaps to the end state over the SAME DOM; nothing
   extra needed here (no height tween exists). Keep transitions inert anyway. */
@media (prefers-reduced-motion: reduce) {
  .camera,
  .timeline__progress { transition: none !important; }
}