/* ============================================================
   AgentFootprint — design system
   Warm paper + characterful. Color language:
     rust   = the brain / agent
     teal   = DATA   (reply that makes the brain REASON)
     amber  = INSTRUCTION (reply that makes the brain ACT)
     green  = the final ANSWER to the asker
   ============================================================ */

:root {
  --paper:      #FBF6EC;
  --paper-2:    #F4EBDB;
  --paper-3:    #ECE0CB;
  --card:       #FFFFFF;
  --ink:        #2C1F15;
  --ink-soft:   #6E5C49;
  --ink-faint:  #A2917C;
  --line:       #E6D8C2;
  --line-soft:  #EFE5D4;

  --rust:       #C0531F;
  --rust-deep:  #95380F;
  --rust-tint:  #F6E4D6;

  --call:       #A8906E;
  --call-deep:  #6E5942;
  --call-tint:  #ECE2D3;
  --brain-from: #E68A52;
  --brain-to:   #C0531F;

  --data:       #0E8A82;
  --data-deep:  #0A6660;
  --data-tint:  #DCF0ED;

  --instr:      #C98512;
  --instr-deep: #9A6306;
  --instr-tint: #F8EBCC;

  --answer:     #3E9B4F;
  --answer-deep:#2C7339;
  --answer-tint:#DEEFDD;

  --error:      #C0392B;
  --error-deep: #922B21;
  --error-tint: #F9E4E1;

  /* contrast-aware foregrounds for coloured fills (theme engine recomputes these) */
  --on-rust: #fff; --on-data: #fff; --on-instr: #fff; --on-answer: #fff; --on-call: #fff; --on-error: #fff;

  /* surfaces that aren't accents: scene glow, grain, code block */
  --scene-glow: #FFFDF9;
  --grain-ink:  rgba(120,90,60,.10);
  --code-bg: #2C1F15; --code-ink: #F3E7D4;
  --code-key: #E9A35C; --code-str: #93C7A6; --code-num: #7FB7D6;

  --shadow-sm: 0 1px 2px rgba(70,45,25,.06), 0 2px 6px rgba(70,45,25,.05);
  --shadow-md: 0 4px 14px rgba(70,45,25,.10), 0 1px 3px rgba(70,45,25,.07);
  --shadow-lg: 0 18px 50px rgba(70,45,25,.16), 0 4px 12px rgba(70,45,25,.08);

  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 22px;
  --r-xl: 30px;

  --font-display: "Bricolage Grotesque", system-ui, sans-serif;
  --font-body: "Hanken Grotesque", system-ui, sans-serif;
  --font-mono: "Space Mono", ui-monospace, monospace;
  --font-hand: "Caveat", cursive;

  /* one knob to match the host app's type scale/density (theme.fonts.scale) */
  --af-text-scale: 1;
  /* cast (brain + toolbox + tool card) scale — the single-agent scene sets this
     per-render from the container width (capped + responsive); 1 everywhere else */
  --af-icon-scale: 1;
}

.atui, .atui-swarm, :where(.atui, .atui-swarm) * { box-sizing: border-box; }



/* faint dotted "napkin" grid behind everything */


:where(.atui, .atui-swarm) button { font-family: inherit; cursor: pointer; }
:where(.atui, .atui-swarm) :focus-visible { outline: 2px solid var(--rust); outline-offset: 2px; }

/* ---------- accent helpers, keyed by reply type ---------- */
:where(.atui, .atui-swarm) .k-data { --accent: var(--data);    --accent-deep: var(--data-deep);    --accent-tint: var(--data-tint);   --accent-on: var(--on-data); }
:where(.atui, .atui-swarm) .k-instr { --accent: var(--instr);   --accent-deep: var(--instr-deep);   --accent-tint: var(--instr-tint);  --accent-on: var(--on-instr); }
:where(.atui, .atui-swarm) .k-answer { --accent: var(--answer);  --accent-deep: var(--answer-deep);  --accent-tint: var(--answer-tint); --accent-on: var(--on-answer); }
:where(.atui, .atui-swarm) .k-prompt { --accent: var(--rust);    --accent-deep: var(--rust-deep);    --accent-tint: var(--rust-tint);   --accent-on: var(--on-rust); }
:where(.atui, .atui-swarm) .k-error { --accent: var(--error);   --accent-deep: var(--error-deep);   --accent-tint: var(--error-tint);  --accent-on: var(--on-error); }

/* ---------- App shell ---------- */
/* `.atui` fills its parent — the host gives the mount element a height (the demo
   does this in demo.css). It was previously a stray global `#root` rule. */
.atui {
  height: 100%;
  display: flex; flex-direction: column;
  max-width: 1480px; margin: 0 auto;
  padding: 18px 26px 0;
}

/* ---------- Top bar ---------- */
:where(.atui, .atui-swarm) .topbar { display: flex; align-items: center; gap: 18px; padding-bottom: 14px; }
:where(.atui, .atui-swarm) .brandmark { display: flex; align-items: center; gap: 11px; }
:where(.atui, .atui-swarm) .brand-dot {
  width: 30px; height: 30px; border-radius: 9px;
  background: linear-gradient(150deg, var(--rust), var(--rust-deep));
  box-shadow: var(--shadow-sm), inset 0 1px 0 rgba(255,255,255,.3);
  display: grid; place-items: center;
  position: relative;
}
:where(.atui, .atui-swarm) .brand-dot::after { /* little footprint dot */
  content: ""; position: absolute; width: 9px; height: 12px; border-radius: 50%;
  background: var(--paper); transform: rotate(-18deg);
}
:where(.atui, .atui-swarm) .brand-name { font-family: var(--font-display); font-weight: 700; font-size: calc(19px * var(--af-text-scale)); letter-spacing: -.01em; }
:where(.atui, .atui-swarm) .brand-name b { color: var(--rust); }
:where(.atui, .atui-swarm) .topbar .task-pill {
  margin-left: 6px; display: flex; align-items: center; gap: 10px;
  background: var(--card); border: 1px solid var(--line);
  padding: 7px 14px 7px 11px; border-radius: 999px; box-shadow: var(--shadow-sm);
  max-width: 560px;
}
:where(.atui, .atui-swarm) .task-pill .rec { width: 9px; height: 9px; border-radius: 50%; background: var(--rust); flex: none;
  box-shadow: 0 0 0 0 rgba(192,83,31,.5); animation: pulse 2.4s infinite; }
@keyframes pulse { 0%{ box-shadow:0 0 0 0 rgba(192,83,31,.45);} 70%{ box-shadow:0 0 0 7px rgba(192,83,31,0);} 100%{box-shadow:0 0 0 0 rgba(192,83,31,0);} }
:where(.atui, .atui-swarm) .task-pill .lbl { font-size: calc(11px * var(--af-text-scale)); text-transform: uppercase; letter-spacing: .12em; color: var(--ink-faint); font-weight: 700; }
:where(.atui, .atui-swarm) .task-pill .txt { font-size: calc(13.5px * var(--af-text-scale)); color: var(--ink); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
:where(.atui, .atui-swarm) .topbar .spacer { flex: 1; }
:where(.atui, .atui-swarm) .agent-tag { font-family: var(--font-mono); font-size: calc(12px * var(--af-text-scale)); color: var(--ink-soft); background: var(--paper-2);
  border: 1px solid var(--line); border-radius: 8px; padding: 5px 9px; }

/* ---------- Main workspace (timeline on top, two resizable panels below) ---------- */
:where(.atui, .atui-swarm) .timeline-top { margin-bottom: 16px; }
:where(.atui, .atui-swarm) .workspace {
  flex: 1; min-height: 0;
  display: flex; align-items: stretch;
  padding-bottom: 16px;
}
:where(.atui, .atui-swarm) .ws-runtime, :where(.atui, .atui-swarm) .ws-insp { display: flex; min-width: 0; min-height: 0; }
:where(.atui, .atui-swarm) .ws-runtime > .panel, :where(.atui, .atui-swarm) .ws-insp > .panel { flex: 1; min-width: 0; }
:where(.atui, .atui-swarm) .ws-insp { flex: 1 1 0; }

:where(.atui, .atui-swarm) .splitter { flex: 0 0 18px; display: flex; align-items: center; justify-content: center; cursor: col-resize; touch-action: none; }
:where(.atui, .atui-swarm) .splitter .grip { width: 4px; height: 44px; border-radius: 3px; background: var(--line); transition: background .15s, height .15s; }
:where(.atui, .atui-swarm) .splitter:hover .grip { background: var(--rust); height: 64px; }

:where(.atui, .atui-swarm) .insp-collapse { margin-left: 8px; width: 26px; height: 26px; border-radius: 8px; border: 1px solid var(--line); background: var(--paper-2);
  color: var(--ink-soft); font-size: calc(17px * var(--af-text-scale)); line-height: 1; display: grid; place-items: center; }
:where(.atui, .atui-swarm) .insp-collapse:hover { background: var(--paper-3); color: var(--ink); }

:where(.atui, .atui-swarm) .panel-tabs { margin-left: auto; display: flex; gap: 3px; background: var(--paper-2); border: 1px solid var(--line); border-radius: 9px; padding: 3px; }
:where(.atui, .atui-swarm) .panel-tabs button { border: 0; background: transparent; color: var(--ink-soft); font-family: var(--font-body); font-size: calc(12px * var(--af-text-scale)); font-weight: 700; padding: 4px 11px; border-radius: 6px; cursor: pointer; }
:where(.atui, .atui-swarm) .panel-tabs button.on { background: var(--card); color: var(--rust); box-shadow: var(--shadow-sm); }

/* ---- Agent notepad (chronological journal that builds up) ---- */
:where(.atui, .atui-swarm) .note-list { position: relative; padding: 12px 0 16px; }
:where(.atui, .atui-swarm) .note-list::before { content: ""; position: absolute; left: 22px; top: 20px; bottom: 20px; width: 2px; background: var(--line-soft); }
:where(.atui, .atui-swarm) .note { position: relative; display: grid; grid-template-columns: 20px 1fr; gap: 11px; padding: 8px 16px; align-items: start; }
:where(.atui, .atui-swarm) .note-dot { width: 13px; height: 13px; border-radius: 50%; background: var(--accent); border: 2.5px solid var(--card); box-shadow: 0 0 0 1.5px var(--accent); margin-top: 3px; z-index: 1; }
:where(.atui, .atui-swarm) .note-nb { min-width: 0; }
:where(.atui, .atui-swarm) .note-head { display: flex; align-items: baseline; gap: 8px; }
:where(.atui, .atui-swarm) .note-n { font-family: var(--font-mono); font-size: calc(10.5px * var(--af-text-scale)); color: var(--ink-faint); flex: none; }
:where(.atui, .atui-swarm) .note-title { font-weight: 700; font-size: calc(13px * var(--af-text-scale)); color: var(--ink); line-height: 1.25; }
:where(.atui, .atui-swarm) .note-text { font-size: calc(12.5px * var(--af-text-scale)); color: var(--ink-soft); line-height: 1.42; margin-top: 3px; text-wrap: pretty; }
:where(.atui, .atui-swarm) .note-meta { font-family: var(--font-mono); font-size: calc(10.5px * var(--af-text-scale)); color: var(--ink-faint); margin-top: 5px; letter-spacing: .02em; }
:where(.atui, .atui-swarm) .note.active { background: var(--accent-tint); border-radius: 12px; }
:where(.atui, .atui-swarm) .note.active .note-title { color: var(--accent-deep); }
:where(.atui, .atui-swarm) .note.active .note-dot { box-shadow: 0 0 0 1.5px var(--accent), 0 0 0 5px var(--accent-tint); }

:where(.atui, .atui-swarm) .insp-rail { display: flex; flex-direction: column; align-items: center; gap: 14px; width: 48px; flex: none;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--r-lg); box-shadow: var(--shadow-md);
  padding: 16px 0; margin-left: 0; }
:where(.atui, .atui-swarm) .insp-rail:hover { background: var(--paper-2); }
:where(.atui, .atui-swarm) .insp-rail .chev { font-size: calc(20px * var(--af-text-scale)); color: var(--rust); font-weight: 800; }
:where(.atui, .atui-swarm) .insp-rail .rail-label { writing-mode: vertical-rl; transform: rotate(180deg); font-family: var(--font-display); font-weight: 700;
  font-size: calc(12.5px * var(--af-text-scale)); letter-spacing: .1em; color: var(--ink-soft); text-transform: uppercase; }
:where(.atui, .atui-swarm) .workspace.insp-collapsed .ws-runtime { margin-right: 14px; }

/* ---------- Inspector accordion ---------- */
:where(.atui, .atui-swarm) .acc { border-bottom: 1px solid var(--line-soft); }
:where(.atui, .atui-swarm) .acc-head { width: 100%; display: flex; align-items: center; gap: 9px; padding: 12px 16px; background: transparent; border: 0; text-align: left; }
:where(.atui, .atui-swarm) .acc-head:hover { background: var(--paper); }
:where(.atui, .atui-swarm) .acc-chev { color: var(--ink-faint); transition: transform .2s; flex: none; }
:where(.atui, .atui-swarm) .acc-chev.open { transform: rotate(90deg); }
:where(.atui, .atui-swarm) .acc-label { font-size: calc(10.5px * var(--af-text-scale)); letter-spacing: .13em; text-transform: uppercase; color: var(--ink-faint); font-weight: 800;
  display: flex; align-items: center; gap: 7px; }
:where(.atui, .atui-swarm) .acc.open .acc-label { color: var(--ink-soft); }
:where(.atui, .atui-swarm) .acc-inner { padding: 2px 16px 15px 39px; }

/* generic panel */
:where(.atui, .atui-swarm) .panel {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--r-lg); box-shadow: var(--shadow-md);
  position: relative; overflow: hidden;
}
:where(.atui, .atui-swarm) .panel-head {
  display: flex; align-items: center; gap: 9px;
  padding: 13px 16px; border-bottom: 1px solid var(--line-soft);
}
:where(.atui, .atui-swarm) .panel-head .h-title { font-family: var(--font-display); font-weight: 700; font-size: calc(14px * var(--af-text-scale)); letter-spacing: .01em; }
:where(.atui, .atui-swarm) .panel-head .h-sub { font-size: calc(12px * var(--af-text-scale)); color: var(--ink-faint); }
:where(.atui, .atui-swarm) .panel-head .step-chip { margin-left: auto; font-family: var(--font-mono); font-size: calc(11.5px * var(--af-text-scale)); color: var(--ink-soft);
  background: var(--paper-2); border: 1px solid var(--line); border-radius: 7px; padding: 3px 8px; }

/* ======================= STAGE ======================= */
:where(.atui, .atui-swarm) .stage { display: flex; flex-direction: column; }
:where(.atui, .atui-swarm) .flowscene {
  flex: 1; min-height: 0; position: relative; overflow: hidden;
  background:
    radial-gradient(72% 82% at 30% 36%, var(--scene-glow), transparent 72%),
    repeating-linear-gradient(0deg, transparent 0 26px, var(--grain-ink) 26px 27px);
}
:where(.atui, .atui-swarm) .scene-inner { position: absolute; inset: 0; }

/* the "ask" beat accent (a muted call colour) */
:where(.atui, .atui-swarm) .k-call { --accent: var(--call); --accent-deep: var(--call-deep); --accent-tint: var(--call-tint); --accent-on: var(--on-call); }

/* --- big sweeping arc (brain <-> toolbox) --- */
:where(.atui, .atui-swarm) .arc-svg { position: absolute; inset: 0; pointer-events: none; overflow: visible; }
:where(.atui, .atui-swarm) .arc-fixed { stroke: var(--line); stroke-width: 2; stroke-linecap: round; opacity: .95; stroke-dasharray: 1 7; }
:where(.atui, .atui-swarm) .arc-fixed-head { fill: var(--line); }
:where(.atui, .atui-swarm) .arc-active { opacity: .55; stroke-dasharray: 5 6; }
:where(.atui, .atui-swarm) .arc-head { opacity: .9; }
@keyframes dashflow { to { stroke-dashoffset: -30; } }
:where(.atui, .atui-swarm) .arc-rider { position: absolute; top: 0; left: 0; offset-distance: 0%; offset-rotate: 0deg; offset-anchor: 50% 50%;
  animation: ride 1.3s ease-in-out forwards .5s; }
@keyframes ride { 0% { offset-distance: 0%; opacity: 0; } 12% { opacity: 1; } 86% { opacity: 1; } 100% { offset-distance: 100%; opacity: 0; } }
:where(.atui, .atui-swarm) .rider-dot { display: block; width: 9px; height: 9px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px var(--accent-tint); transform: translate(-50%, -50%); }
:where(.atui, .atui-swarm) .rider-chip { display: grid; place-items: center; width: 24px; height: 24px; border-radius: 7px; background: var(--accent); color: var(--accent-on, #fff); box-shadow: var(--shadow-md); transform: translate(-50%, -50%); }
:where(.atui, .atui-swarm) .arc-tag { position: absolute; transform: translate(-50%, -50%); font-family: var(--font-hand); font-size: calc(18px * var(--af-text-scale)); color: var(--accent-deep); white-space: nowrap; opacity: 0; animation: fadeIn .3s ease forwards .65s; background: var(--paper); padding: 2px 13px; border-radius: 999px; }
/* (the fixed arcs are static; only the packet + bubbles animate) */

/* --- brain node (left) --- */
:where(.atui, .atui-swarm, .atui-backtrack) .brain-node { position: absolute; transform: translate(-50%, -50%); }
:where(.atui, .atui-swarm) .thoughtpos { position: absolute; bottom: 100%; margin-bottom: 12px; left: 50%; transform: translateX(-50%); display: flex; flex-direction: column; align-items: center; gap: 8px; z-index: 6; }

/* Extended-thinking callout — the model's chain-of-thought, above the action. */
:where(.atui, .atui-swarm) .thinking-callout { width: max-content; max-width: 268px; background: var(--paper-2); border: 1px dashed var(--line); border-radius: 14px; padding: 6px 11px; box-shadow: var(--shadow-sm); }
:where(.atui, .atui-swarm) .thinking-callout .tc-toggle { display: flex; align-items: center; gap: 6px; width: 100%; background: none; border: none; cursor: pointer; padding: 0; font-family: var(--font-mono); font-size: calc(10.5px * var(--af-text-scale)); color: var(--ink-soft); text-transform: uppercase; letter-spacing: .08em; }
:where(.atui, .atui-swarm) .thinking-callout .tc-label { font-weight: 700; }
:where(.atui, .atui-swarm) .thinking-callout .tc-chev { margin-left: auto; color: var(--ink-faint); }
:where(.atui, .atui-swarm) .thinking-callout .tc-text { margin-top: 5px; font-size: calc(12px * var(--af-text-scale)); line-height: 1.5; color: var(--ink); white-space: pre-wrap; word-break: break-word; }
:where(.atui, .atui-swarm) .thinking-callout.open .tc-text { max-height: 220px; overflow: auto; }
:where(.atui, .atui-swarm, .atui-backtrack) .brain-label { position: absolute; top: 50%; margin-top: calc(49px * var(--af-icon-scale) + 10px); left: 50%; transform: translateX(-50%); white-space: normal;
  max-width: 100px; text-align: center; line-height: 1.2; font-size: calc(11.5px * var(--af-text-scale)); font-weight: 700; color: var(--ink-soft); letter-spacing: .01em; }
:where(.atui, .atui-swarm) .io-tag { position: absolute; right: 100%; margin-right: 16px; top: 50%; transform: translateY(-50%); white-space: nowrap;
  font-family: var(--font-display); font-weight: 700; font-size: calc(11px * var(--af-text-scale)); letter-spacing: .03em; padding: 5px 11px; border-radius: 999px;
  background: var(--accent-tint); color: var(--accent-deep); border: 1px solid var(--accent); box-shadow: var(--shadow-sm); animation: tagIn .5s cubic-bezier(.2,1,.3,1) both .55s; }
@keyframes tagIn { from { opacity: 0; transform: translate(10px, -50%); } to { opacity: 1; transform: translate(0, -50%); } }

:where(.atui, .atui-swarm) .cloud {
  position: relative; background: var(--card); border: 2px solid var(--accent);
  color: var(--ink); border-radius: 34px 40px 30px 42px / 40px 32px 42px 34px; padding: 15px 19px; box-shadow: var(--shadow-md);
  width: max-content; max-width: 268px; animation: pop .5s cubic-bezier(.2,1.2,.3,1) both .5s;
}
:where(.atui, .atui-swarm) .cloud::before, :where(.atui, .atui-swarm) .cloud::after { content: ""; position: absolute; background: var(--card);
  border: 1.5px solid var(--accent); border-radius: 50%; }
:where(.atui, .atui-swarm) .cloud::before { width: 15px; height: 15px; left: 50%; bottom: -11px; transform: translateX(-50%); }
:where(.atui, .atui-swarm) .cloud::after { width: 8px; height: 8px; left: 50%; bottom: -22px; transform: translateX(-50%); }
:where(.atui, .atui-swarm) .cloud .ctag { font-family: var(--font-hand); font-size: calc(17px * var(--af-text-scale)); color: var(--accent-deep); line-height: 1; margin-bottom: 5px; display: flex; align-items: center; gap: 8px; }
:where(.atui, .atui-swarm) .cloud .ctag .dots { display: inline-flex; gap: 3px; }
:where(.atui, .atui-swarm) .cloud .ctag .dots i { width: 5px; height: 5px; border-radius: 50%; background: var(--accent); display: inline-block; animation: blink 1.3s infinite; }
:where(.atui, .atui-swarm) .cloud .ctag .dots i:nth-child(2) { animation-delay: .18s; }
:where(.atui, .atui-swarm) .cloud .ctag .dots i:nth-child(3) { animation-delay: .36s; }
:where(.atui, .atui-swarm) .cloud .ctext { font-size: calc(12.5px * var(--af-text-scale)); line-height: 1.42; color: var(--ink); }
@keyframes blink { 0%, 65%, 100% { opacity: .22; transform: translateY(0); } 32% { opacity: 1; transform: translateY(-3px); } }

/* cloud + doc carry their own .5s entrance delay */

:where(.atui, .atui-swarm) .skilldoc {
  width: max-content; max-width: 268px; background: var(--card); border: 1.5px solid var(--instr);
  border-radius: 16px; box-shadow: var(--shadow-md); overflow: hidden; animation: slideUp .5s cubic-bezier(.2,1,.3,1) both .5s;
}
:where(.atui, .atui-swarm) .skilldoc .sd-head { display: flex; align-items: center; gap: 8px; padding: 9px 13px; background: var(--instr-tint);
  border-bottom: 1px solid var(--instr); }
:where(.atui, .atui-swarm) .skilldoc .sd-clip { width: 22px; height: 22px; border-radius: 6px; background: var(--instr); color: var(--on-instr, #fff); display: grid; place-items: center; font-size: calc(13px * var(--af-text-scale)); flex: none; }
:where(.atui, .atui-swarm) .skilldoc .sd-name { font-family: var(--font-mono); font-size: calc(12.5px * var(--af-text-scale)); font-weight: 700; color: var(--instr-deep); }
:where(.atui, .atui-swarm) .skilldoc .sd-kicker { font-size: calc(10px * var(--af-text-scale)); letter-spacing: .12em; text-transform: uppercase; color: var(--instr-deep); opacity: .8; margin-left: auto; font-weight: 700; }
:where(.atui, .atui-swarm) .skilldoc .sd-list { list-style: none; margin: 0; padding: 8px 13px 11px; display: flex; flex-direction: column; gap: 7px; }
:where(.atui, .atui-swarm) .skilldoc .sd-list li { display: flex; align-items: flex-start; gap: 9px; font-size: calc(13px * var(--af-text-scale)); color: var(--ink); opacity: 1; animation: checkIn .4s ease both; }
:where(.atui, .atui-swarm) .skilldoc .sd-list li .box { width: 17px; height: 17px; border-radius: 5px; border: 1.5px solid var(--instr); background: var(--instr); color: var(--on-instr, #fff); display: grid; place-items: center; font-size: calc(11px * var(--af-text-scale)); flex: none; margin-top: 1px; }

@keyframes checkIn { from { opacity: 0; transform: translateX(-6px); } to { opacity: 1; transform: none; } }

/* the brain itself */
:where(.atui, .atui-swarm, .atui-backtrack) .brain {
  width: 112px; height: 98px; position: relative;
  filter: drop-shadow(0 8px 16px rgba(150,70,30,.18));
  /* shrink the whole mascot uniformly (face + folds + gradients) — one knob,
     defaults to 1 so swarm/backtrack are unchanged */
  transform: scale(var(--af-icon-scale)); transform-origin: center center;
}
:where(.atui, .atui-swarm, .atui-backtrack) .brain-svg { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; }
@keyframes bob { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-5px); } }
:where(.atui, .atui-swarm, .atui-backtrack) .brain .blob {
  position: absolute; inset: 0; border-radius: 49% 51% 47% 53% / 55% 52% 48% 45%;
  background: linear-gradient(155deg, var(--brain-from), var(--brain-to));
  border: 2.5px solid #fff;
}
/* themeable brain: emoji or image instead of the drawn blob */
:where(.atui, .atui-swarm, .atui-backtrack) .brain.brain-custom { display: grid; place-items: center; border-radius: 50%; overflow: hidden;
  background: var(--paper-2); border: 2.5px solid #fff; box-shadow: inset 0 0 0 1px var(--line); }
:where(.atui, .atui-swarm, .atui-backtrack) .brain.brain-custom img { width: 100%; height: 100%; object-fit: cover; }
:where(.atui, .atui-swarm, .atui-backtrack) .brain.brain-emoji { font-size: calc(56px * var(--af-text-scale)); line-height: 1; background: linear-gradient(155deg, var(--brain-from), var(--brain-to)); }
:where(.atui, .atui-swarm, .atui-backtrack) .brain-label-legacy { display: none; }
:where(.atui, .atui-swarm, .atui-backtrack) .brain .seam { position: absolute; top: 7px; bottom: 20px; left: 50%; width: 2.5px; transform: translateX(-50%);
  background: rgba(255,255,255,.55); border-radius: 2px; opacity: .5; }
:where(.atui, .atui-swarm, .atui-backtrack) .brain .gyrus { position: absolute; inset: 9px; border-radius: inherit; opacity: .5;
  background:
    radial-gradient(circle at 26% 30%, transparent 6px, rgba(255,255,255,.5) 7px, transparent 8px),
    radial-gradient(circle at 70% 26%, transparent 5px, rgba(255,255,255,.45) 6px, transparent 7px),
    radial-gradient(circle at 30% 60%, transparent 7px, rgba(255,255,255,.45) 8px, transparent 9px),
    radial-gradient(circle at 72% 62%, transparent 6px, rgba(255,255,255,.4) 7px, transparent 8px);
}
:where(.atui, .atui-swarm, .atui-backtrack) .brain .eyes { position: absolute; top: 42px; left: 0; right: 0; display: flex; justify-content: center; gap: 16px; transition: transform .3s; }
:where(.atui, .atui-swarm, .atui-backtrack) .brain .eye { width: 11px; height: 11px; border-radius: 50%; background: var(--ink); position: relative; }
:where(.atui, .atui-swarm, .atui-backtrack) .brain .eye::after { content: ""; position: absolute; width: 4px; height: 4px; border-radius: 50%; background: #fff; top: 1px; right: 1px; }
:where(.atui, .atui-swarm, .atui-backtrack) .brain.thinking .eyes { transform: translateY(-3px); animation: glance 3s ease-in-out infinite; }
@keyframes glance {
  0%, 60%, 100% { transform: translate(0, -3px) scaleY(1); }
  18% { transform: translate(-3.5px, -3px) scaleY(1); }
  40% { transform: translate(3.5px, -2px) scaleY(1); }
  84% { transform: translate(0, -3px) scaleY(.16); }
  90% { transform: translate(0, -3px) scaleY(1); }
}
:where(.atui, .atui-swarm, .atui-backtrack) .brain .mouth { position: absolute; bottom: 26px; left: 50%; width: 16px; height: 8px; border-radius: 0 0 16px 16px;
  border: 2px solid var(--ink); border-top: 0; transform: translateX(-50%); }
:where(.atui, .atui-swarm, .atui-backtrack) .brain.acting .mouth { width: 12px; height: 12px; border-radius: 50%; border: 2px solid var(--ink); bottom: 24px; }
@keyframes pop { from { opacity: 0; transform: scale(.85) translateY(6px); } to { opacity: 1; transform: none; } }
@keyframes slideUp { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
@keyframes fadeIn { to { opacity: 1; } }

/* --- tool node (right): the tool pops OUT of the top of the toolbox --- */
:where(.atui, .atui-swarm) .tool-node { position: absolute; transform: translate(-50%, -50%); }
:where(.atui, .atui-swarm) .tool-out { position: absolute; left: 50%; bottom: calc(100% - 30px); z-index: 3; transform: translate(-50%, 0);
  display: flex; flex-direction: column; align-items: center; gap: 3px; background: var(--card); border: 1.5px solid var(--call);
  border-radius: 15px; padding: 11px 15px 9px; box-shadow: 0 0 0 3px var(--call-tint), var(--shadow-md);
  animation: toolPop .55s cubic-bezier(.2,1.3,.35,1) both .3s; }
@keyframes toolPop { from { opacity: 0; transform: translate(-50%, 22px) scale(.78); } to { opacity: 1; transform: translate(-50%, 0) scale(1); } }
:where(.atui, .atui-swarm) .tool-out .to-ico { width: 32px; height: 32px; border-radius: 9px; background: var(--call); color: var(--on-call, #fff); display: grid; place-items: center; }
:where(.atui, .atui-swarm) .tool-out .to-name { font-family: var(--font-mono); font-size: calc(12px * var(--af-text-scale)); font-weight: 700; color: var(--call-deep); }
/* "saw N, picked 1": the tool menu the model chose from, under the picked card.
   picked = lit; the rest dimmed. tools get the tool icon, skills the doc glyph. */
:where(.atui, .atui-swarm) .tool-out .tool-menu { display: flex; align-items: center; gap: 6px; margin-top: 6px; padding-top: 6px; border-top: 1px dashed var(--line); max-width: 168px; flex-wrap: wrap; justify-content: center; }
:where(.atui, .atui-swarm) .tool-out .tm-label { font-family: var(--font-mono); font-size: calc(9px * var(--af-text-scale)); font-weight: 700; letter-spacing: .07em; text-transform: uppercase; color: var(--ink-faint); }
:where(.atui, .atui-swarm) .tool-out .tm-icons { display: flex; align-items: center; gap: 4px; }
:where(.atui, .atui-swarm) .tool-out .tm-ico { width: 18px; height: 18px; border-radius: 5px; display: grid; place-items: center; background: var(--paper-2); color: var(--ink-faint); opacity: .5; }
:where(.atui, .atui-swarm) .tool-out .tm-ico svg { width: 11px; height: 11px; }
:where(.atui, .atui-swarm) .tool-out .tm-ico.picked { opacity: 1; background: var(--call); color: var(--on-call, #fff); }
:where(.atui, .atui-swarm) .tool-out .tm-ico.skill.picked { background: var(--instr); color: var(--on-instr, #fff); }

/* RACK mode (toolMenu="rack"): the toolbox is a vertical rack of every tool the
   model can use (icon + name beneath). The picked tool is lit + the arrow lands
   on it; the rest are dimmed. Rows are a fixed --tr-item-h (set inline from JS,
   matching the arrow geometry) with no gaps, so the pitch is exact. */
:where(.atui, .atui-swarm) .tool-node.rack { z-index: 3; }
:where(.atui, .atui-swarm) .tool-rack { position: relative; display: flex; flex-direction: column; background: var(--card); border: 1.5px solid var(--call); border-radius: 14px; padding: 6px; box-shadow: 0 0 0 3px var(--call-tint), var(--shadow-md); }
/* "Why this tool?" trigger — floats below the rack (absolute → doesn't shift rows) */
:where(.atui, .atui-swarm) .tool-rack .tr-why { position: absolute; top: calc(100% + 8px); left: 0; right: 0; display: flex; align-items: center; justify-content: center; gap: 6px; white-space: nowrap; padding: 7px 10px; border-radius: 10px; border: 1px solid var(--line); background: var(--card); color: var(--ink-soft); font-family: var(--font-body); font-size: calc(11.5px * var(--af-text-scale)); font-weight: 700; cursor: pointer; box-shadow: var(--shadow-sm); transition: background .15s, color .15s, border-color .15s; }
:where(.atui, .atui-swarm) .tool-rack .tr-why:hover { background: var(--call); border-color: var(--call-deep); color: var(--on-call, #fff); }
:where(.atui, .atui-swarm) .tool-rack .tr-why:focus-visible { outline: 2px solid var(--call); outline-offset: 1px; }
:where(.atui, .atui-swarm) .tool-rack .tr-item { height: var(--tr-item-h, 48px); display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; padding: 0 12px; border-radius: 9px; opacity: .42; transition: opacity .2s ease, background .2s ease; }
:where(.atui, .atui-swarm) .tool-rack .tr-ico { width: 26px; height: 26px; border-radius: 7px; display: grid; place-items: center; background: var(--paper-2); color: var(--ink-soft); }
:where(.atui, .atui-swarm) .tool-rack .tr-ico svg { width: 15px; height: 15px; }
:where(.atui, .atui-swarm) .tool-rack .tr-name { font-family: var(--font-mono); font-size: calc(10px * var(--af-text-scale)); color: var(--ink-soft); white-space: nowrap; max-width: 130px; overflow: hidden; text-overflow: ellipsis; }
:where(.atui, .atui-swarm) .tool-rack .tr-item.on { opacity: 1; background: var(--call-tint); }
:where(.atui, .atui-swarm) .tool-rack .tr-item.on .tr-ico { background: var(--call); color: var(--on-call, #fff); }
:where(.atui, .atui-swarm) .tool-rack .tr-item.on .tr-name { color: var(--call-deep); font-weight: 700; }
:where(.atui, .atui-swarm) .tool-rack .tr-item.skill.on { background: var(--instr-tint, var(--paper-2)); }
:where(.atui, .atui-swarm) .tool-rack .tr-item.skill.on .tr-ico { background: var(--instr); color: var(--on-instr, #fff); }
:where(.atui, .atui-swarm) .tool-rack .tr-item.skill.on .tr-name { color: var(--instr-deep); }
:where(.atui, .atui-swarm) .tool-rack .tr-more { height: var(--tr-item-h, 48px); display: grid; place-items: center; font-family: var(--font-mono); font-size: calc(10px * var(--af-text-scale)); color: var(--ink-faint); }
/* clickable rack (rack mode): each tool opens the inspector's "Why this tool?" */
:where(.atui, .atui-swarm) .tool-rack.clickable .tr-item { cursor: pointer; }
:where(.atui, .atui-swarm) .tool-rack.clickable .tr-item:hover { opacity: 1; background: var(--paper-3, var(--paper-2)); }
:where(.atui, .atui-swarm) .tool-rack.clickable .tr-item:focus-visible { outline: 2px solid var(--call); outline-offset: 1px; }

/* "Why this tool?" inspector panel — tools ranked by relevance (bars). */
:where(.atui, .atui-swarm) .why-wrap { border-radius: 10px; }
/* flash when the panel is (re)focused via a rack/button click, so the auto-scroll jump is obvious */
:where(.atui, .atui-swarm) .why-wrap.why-flash { animation: whyFlash .9s ease; }
@keyframes whyFlash { 0% { background: var(--call-tint); box-shadow: 0 0 0 6px var(--call-tint); } 100% { background: transparent; box-shadow: 0 0 0 0 transparent; } }
:where(.atui, .atui-swarm) .why-sub { font-size: calc(11px * var(--af-text-scale)); color: var(--ink-faint); margin-bottom: 9px; line-height: 1.4; }
/* the bars are a proxy → two ways to the real why: copy-to-LLM, or live explain */
:where(.atui, .atui-swarm) .why-actions { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 11px; }
:where(.atui, .atui-swarm) .why-copy, :where(.atui, .atui-swarm) .why-explain { display: inline-flex; align-items: center; gap: 6px; padding: 6px 11px; border-radius: 9px; border: 1px solid var(--line); background: var(--paper-2); color: var(--ink); font-family: var(--font-body); font-size: calc(11.5px * var(--af-text-scale)); font-weight: 700; cursor: pointer; transition: background .15s, border-color .15s, color .15s; }
:where(.atui, .atui-swarm) .why-copy:hover, :where(.atui, .atui-swarm) .why-explain:hover { border-color: var(--ink-faint); background: var(--card); }
:where(.atui, .atui-swarm) .why-explain { background: var(--instr-tint, var(--paper-2)); border-color: var(--instr); color: var(--instr-deep); }
:where(.atui, .atui-swarm) .why-explain:hover { background: var(--instr); color: var(--on-instr, #fff); }
:where(.atui, .atui-swarm) .why-explain:disabled { opacity: .6; cursor: default; }
:where(.atui, .atui-swarm) .why-copy:focus-visible, :where(.atui, .atui-swarm) .why-explain:focus-visible { outline: 2px solid var(--rust); outline-offset: 1px; }
/* the live LLM explanation, rendered in place */
:where(.atui, .atui-swarm) .why-explanation { margin-bottom: 12px; padding: 10px 12px; border-radius: 10px; border: 1px solid var(--instr); background: var(--instr-tint, var(--paper-2)); color: var(--ink); font-size: calc(12.5px * var(--af-text-scale)); line-height: 1.5; white-space: pre-wrap; }
:where(.atui, .atui-swarm) .why-explanation .we-tag { display: inline-block; margin-right: 7px; font-family: var(--font-mono); font-size: calc(9px * var(--af-text-scale)); font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--on-instr, #fff); background: var(--instr); border-radius: 5px; padding: 1px 6px; vertical-align: 1px; }

/* Description Doctor — a suggested clearer description, as a red/green diff. */
:where(.atui, .atui-swarm) .why-doctor { display: inline-flex; align-items: center; gap: 6px; padding: 6px 11px; border-radius: 9px; border: 1px solid var(--line); background: var(--paper-2); color: var(--ink); font-family: var(--font-body); font-size: calc(11.5px * var(--af-text-scale)); font-weight: 700; cursor: pointer; transition: background .15s, border-color .15s; }
:where(.atui, .atui-swarm) .why-doctor:hover { border-color: var(--ink-faint); background: var(--card); }
:where(.atui, .atui-swarm) .why-doctor:disabled { opacity: .6; cursor: default; }
:where(.atui, .atui-swarm) .desc-doctor { margin-bottom: 12px; padding: 11px 12px; border-radius: 10px; border: 1px solid var(--line); background: var(--paper-2); }
:where(.atui, .atui-swarm) .dd-label { font-family: var(--font-mono); font-size: calc(9px * var(--af-text-scale)); font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-faint); margin: 8px 0 3px; }
:where(.atui, .atui-swarm) .dd-label:first-child { margin-top: 0; }
:where(.atui, .atui-swarm) .dd-old, :where(.atui, .atui-swarm) .dd-new, :where(.atui, .atui-swarm) .dd-diff { padding: 7px 9px; border-radius: 8px; font-size: calc(12px * var(--af-text-scale)); line-height: 1.5; white-space: pre-wrap; }
:where(.atui, .atui-swarm) .dd-old { background: rgba(192, 57, 43, .08); color: #8a2c20; text-decoration: line-through; text-decoration-color: rgba(192, 57, 43, .5); }
:where(.atui, .atui-swarm) .dd-new { background: rgba(30, 132, 73, .1); color: #14653a; }
:where(.atui, .atui-swarm) .dd-diff { background: var(--card); }
:where(.atui, .atui-swarm) .dd-del { color: #c0392b; text-decoration: line-through; text-decoration-color: rgba(192, 57, 43, .7); }
:where(.atui, .atui-swarm) .dd-ins { color: #1e8449; background: rgba(30, 132, 73, .14); border-radius: 3px; }
:where(.atui, .atui-swarm) .dd-copy { margin-top: 9px; display: inline-flex; align-items: center; gap: 6px; padding: 6px 11px; border-radius: 9px; border: 1px solid var(--line); background: var(--card); color: var(--ink); font-family: var(--font-body); font-size: calc(11.5px * var(--af-text-scale)); font-weight: 700; cursor: pointer; }
:where(.atui, .atui-swarm) .dd-copy:hover { border-color: var(--ink-faint); }
:where(.atui, .atui-swarm) .why-tool { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 9px; }
:where(.atui, .atui-swarm) .why-tool .wt-row { padding: 7px 9px; border-radius: 9px; border: 1px solid transparent; }
:where(.atui, .atui-swarm) .why-tool .wt-row.focus { border-color: var(--line); background: var(--paper-2); }
:where(.atui, .atui-swarm) .why-tool .wt-head { display: flex; align-items: center; gap: 8px; margin-bottom: 5px; }
:where(.atui, .atui-swarm) .why-tool .wt-name { font-family: var(--font-mono); font-size: calc(11.5px * var(--af-text-scale)); color: var(--ink); font-weight: 700; }
:where(.atui, .atui-swarm) .why-tool .wt-row.picked .wt-name { color: var(--call-deep); }
:where(.atui, .atui-swarm) .why-tool .wt-tag { font-family: var(--font-mono); font-size: calc(9px * var(--af-text-scale)); font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--on-call, #fff); background: var(--call); border-radius: 5px; padding: 1px 6px; }
:where(.atui, .atui-swarm) .why-tool .wt-val { margin-left: auto; font-family: var(--font-mono); font-size: calc(11px * var(--af-text-scale)); color: var(--ink-soft); }
:where(.atui, .atui-swarm) .why-tool .wt-meter { display: block; height: 7px; border-radius: 999px; background: var(--paper-3, var(--paper-2)); overflow: hidden; }
:where(.atui, .atui-swarm) .why-tool .wt-fill { display: block; height: 100%; border-radius: 999px; background: var(--ink-faint); transition: width .3s ease; }
:where(.atui, .atui-swarm) .why-tool .wt-row.picked .wt-fill { background: var(--call); }
:where(.atui, .atui-swarm) .why-tool .wt-matched { margin-top: 6px; font-family: var(--font-mono); font-size: calc(10.5px * var(--af-text-scale)); color: var(--ink-soft); }
/* a tool that returns BOTH is two-tone: data (teal) shell + instruction (amber) icon */
:where(.atui, .atui-swarm) .k-both .tool-out { border-color: var(--data); box-shadow: 0 0 0 3px var(--data-tint), var(--shadow-md); }
:where(.atui, .atui-swarm) .k-both .tool-out .to-ico { background: var(--instr); }
:where(.atui, .atui-swarm) .k-both .tool-out .to-name { color: var(--ink-soft); }

/* --- toolbox --- */
:where(.atui, .atui-swarm) .toolbox { position: relative; width: 84px; flex: none; }
:where(.atui, .atui-swarm) .tb-lid { height: 13px; background: var(--paper-3); border: 1.5px solid var(--line); border-bottom: 0;
  border-radius: 8px 8px 0 0; position: relative; transform-origin: bottom; transition: transform .45s cubic-bezier(.3,.8,.3,1); z-index: 2; }
:where(.atui, .atui-swarm) .tb-handle { position: absolute; left: 50%; top: -5px; transform: translateX(-50%); width: 28px; height: 7px; border-radius: 6px; background: var(--ink-faint); }
:where(.atui, .atui-swarm) .toolbox.open .tb-lid { transform: perspective(120px) rotateX(46deg) translateY(-1px); }
:where(.atui, .atui-swarm) .tb-body { background: var(--paper-2); border: 1.5px solid var(--line); border-top: 0; border-radius: 0 0 11px 11px;
  padding: 9px 9px 11px; box-shadow: var(--shadow-sm); }
:where(.atui, .atui-swarm) .tb-label { font-family: var(--font-hand); font-size: calc(15px * var(--af-text-scale)); color: var(--ink-soft); display: block; text-align: center; margin-bottom: 7px; }
:where(.atui, .atui-swarm) .tb-slots { display: flex; justify-content: center; gap: 5px; }
:where(.atui, .atui-swarm) .tb-slots span { width: 8px; height: 18px; border-radius: 3px; background: var(--paper-3); border: 1px solid var(--line); }
:where(.atui, .atui-swarm) .toolbox.open .tb-slots span:first-child { background: transparent; border-style: dashed; }
:where(.atui, .atui-swarm) .toolbox.idle { opacity: .68; }
/* pluggable toolbox icon (emoji / image) — falls back to the drawn box */
:where(.atui, .atui-swarm) .toolbox.tb-custom { display: flex; flex-direction: column; align-items: center; gap: 6px; }
:where(.atui, .atui-swarm) .tb-figure { width: 64px; height: 56px; border-radius: 13px; background: var(--paper-2); border: 1.5px solid var(--line); display: grid; place-items: center; overflow: hidden; box-shadow: var(--shadow-sm); }
:where(.atui, .atui-swarm) .tb-figure img { width: 100%; height: 100%; object-fit: cover; }
:where(.atui, .atui-swarm) .tb-figure.tb-emoji { font-size: calc(32px * var(--af-text-scale)); }

/* 'acting' hand-label on the steering doc (mirrors the cloud's 'thinking') */
:where(.atui, .atui-swarm) .sd-tag { font-family: var(--font-hand); font-size: calc(18px * var(--af-text-scale)); color: var(--instr-deep); display: flex; align-items: center; gap: 7px; padding: 9px 13px 1px; }
:where(.atui, .atui-swarm) .sd-tag .dots i { background: var(--instr); }

/* compact + dual bubbles (a tool that returns BOTH data and instruction) */
:where(.atui, .atui-swarm) .k-both { --accent: var(--instr); --accent-deep: var(--instr-deep); --accent-tint: var(--instr-tint); --accent-on: var(--on-instr); }
:where(.atui, .atui-swarm) .dual-thoughts { position: absolute; transform: translateX(-50%); display: flex; gap: 12px; align-items: flex-end; z-index: 6; }
:where(.atui, .atui-swarm) .dual-thoughts .cloud::before, :where(.atui, .atui-swarm) .dual-thoughts .cloud::after { display: none; }
:where(.atui, .atui-swarm) .cloud.tone-data { --accent: var(--data); --accent-deep: var(--data-deep); --accent-tint: var(--data-tint); }
:where(.atui, .atui-swarm) .cloud.compact, :where(.atui, .atui-swarm) .skilldoc.compact { max-width: 186px; }
:where(.atui, .atui-swarm) .cloud.compact { padding: 10px 12px; }
:where(.atui, .atui-swarm) .cloud.compact .ctag { font-size: calc(16px * var(--af-text-scale)); margin-bottom: 3px; }
:where(.atui, .atui-swarm) .cloud.compact .ctext { font-size: calc(11.5px * var(--af-text-scale)); line-height: 1.34; }
:where(.atui, .atui-swarm) .skilldoc.compact .sd-tag { font-size: calc(15px * var(--af-text-scale)); padding: 7px 11px 0; }
:where(.atui, .atui-swarm) .skilldoc.compact .sd-head { padding: 6px 11px; }
:where(.atui, .atui-swarm) .skilldoc.compact .sd-name { font-size: calc(11px * var(--af-text-scale)); }
:where(.atui, .atui-swarm) .skilldoc.compact .sd-kicker { display: none; }
:where(.atui, .atui-swarm) .skilldoc.compact .sd-list { padding: 6px 11px 9px; gap: 5px; }
:where(.atui, .atui-swarm) .skilldoc.compact .sd-list li { font-size: calc(11px * var(--af-text-scale)); }
:where(.atui, .atui-swarm) .arc-rider.rb-1 { animation-delay: .55s; }
:where(.atui, .atui-swarm) .arc-rider.rb-2 { animation-delay: 1.2s; }

/* ---- choreography: a single directed stream that ENDS by triggering the next beat ---- */
/* ASK: 'calling' cloud first → arc draws → packet streams to the box → tool pops on arrival */
:where(.atui, .atui-swarm) .k-call .cloud { animation-delay: .2s; }
:where(.atui, .atui-swarm) .k-call .arc-line { animation-delay: .5s; }
:where(.atui, .atui-swarm) .k-call .arc-head { animation-delay: .9s; }
:where(.atui, .atui-swarm) .k-call .arc-rider { animation-delay: .5s; }
:where(.atui, .atui-swarm) .k-call .arc-tag { animation-delay: .85s; }
:where(.atui, .atui-swarm) .k-call .tool-out { animation-delay: 1.6s; }
/* RETURN: tool is ALREADY out (no re-pop) → reply streams back → brain thinks/acts when it ARRIVES */
:where(.atui, .atui-swarm) .k-data .tool-out, :where(.atui, .atui-swarm) .k-instr .tool-out, :where(.atui, .atui-swarm) .k-both .tool-out { animation: none; }
:where(.atui, .atui-swarm) .k-data .arc-line, :where(.atui, .atui-swarm) .k-instr .arc-line, :where(.atui, .atui-swarm) .k-both .arc-line { animation-delay: .35s; }
:where(.atui, .atui-swarm) .k-data .arc-head, :where(.atui, .atui-swarm) .k-instr .arc-head, :where(.atui, .atui-swarm) .k-both .arc-head { animation-delay: .8s; }
:where(.atui, .atui-swarm) .k-data .arc-tag, :where(.atui, .atui-swarm) .k-instr .arc-tag, :where(.atui, .atui-swarm) .k-both .arc-tag { animation-delay: .7s; }
:where(.atui, .atui-swarm) .k-data .arc-rider, :where(.atui, .atui-swarm) .k-instr .arc-rider { animation-delay: .45s; }
:where(.atui, .atui-swarm) .k-data .cloud { animation-delay: 1.6s; }
:where(.atui, .atui-swarm) .k-instr .skilldoc { animation-delay: 1.6s; }
:where(.atui, .atui-swarm) .k-both .cloud, :where(.atui, .atui-swarm) .k-both .skilldoc { animation-delay: 1.95s; }
:where(.atui, .atui-swarm) .k-both .arc-rider.rb-1 { animation-delay: .45s; }
:where(.atui, .atui-swarm) .k-both .arc-rider.rb-2 { animation-delay: .8s; }

/* ======================= INSPECTOR ======================= */
:where(.atui, .atui-swarm) .inspector { display: flex; flex-direction: column; }
:where(.atui, .atui-swarm) .insp-body { flex: 1; min-height: 0; overflow-y: auto; padding: 4px 4px 10px; }
:where(.atui, .atui-swarm) .insp-body::-webkit-scrollbar { width: 8px; }
:where(.atui, .atui-swarm) .insp-body::-webkit-scrollbar-thumb { background: var(--line); border-radius: 8px; }

:where(.atui, .atui-swarm) .field { padding: 12px 16px; border-bottom: 1px solid var(--line-soft); }
:where(.atui, .atui-swarm) .field .f-label { font-size: calc(10.5px * var(--af-text-scale)); letter-spacing: .13em; text-transform: uppercase; color: var(--ink-faint); font-weight: 800; margin-bottom: 7px; display: flex; align-items: center; gap: 7px; }
:where(.atui, .atui-swarm) .tagdot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }

:where(.atui, .atui-swarm) .io-grid { display: grid; grid-template-columns: 1fr; gap: 8px; }
:where(.atui, .atui-swarm) .code {
  font-family: var(--font-mono); font-size: calc(11.5px * var(--af-text-scale)); line-height: 1.5; color: var(--ink);
  background: var(--code-bg); color: var(--code-ink); border-radius: 10px; padding: 10px 12px; overflow-x: auto; white-space: pre-wrap; word-break: break-word;
}
:where(.atui, .atui-swarm) .code .k { color: var(--code-key); } :where(.atui, .atui-swarm) .code .s { color: var(--code-str); } :where(.atui, .atui-swarm) .code .n { color: var(--code-num); }
:where(.atui, .atui-swarm) .io-label { font-family: var(--font-mono); font-size: calc(10.5px * var(--af-text-scale)); color: var(--ink-faint); margin-bottom: 4px; }

/* "Tools the model saw" — the tool menu behind a tool-selection decision. */
:where(.atui, .atui-swarm) .tools-seen { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 7px; }
:where(.atui, .atui-swarm) .tools-seen li { font-size: calc(12px * var(--af-text-scale)); line-height: 1.45; }
:where(.atui, .atui-swarm) .ts-name { font-family: var(--font-mono); font-size: calc(11px * var(--af-text-scale)); padding: 1px 6px; border-radius: 6px; background: var(--surface-sunken, rgba(127,127,127,0.12)); color: var(--ink); }
:where(.atui, .atui-swarm) .ts-desc { color: var(--ink-soft, var(--ink-faint)); }

:where(.atui, .atui-swarm) .reply-banner { display: flex; align-items: center; gap: 10px; padding: 11px 14px; border-radius: 12px;
  background: var(--accent-tint); border: 1px solid var(--accent); margin: 12px 16px; }
:where(.atui, .atui-swarm) .err-banner { display: flex; align-items: center; gap: 10px; margin: 12px 16px; padding: 10px 13px; border-radius: 12px;
  background: var(--error-tint); border: 1px solid var(--error); }
:where(.atui, .atui-swarm) .err-banner .eb-tag { font-family: var(--font-display); font-weight: 700; font-size: calc(11.5px * var(--af-text-scale)); letter-spacing: .03em;
  background: var(--error); color: var(--on-error, #fff); padding: 4px 9px; border-radius: 7px; white-space: nowrap; }
:where(.atui, .atui-swarm) .err-banner .eb-text { font-size: calc(12.5px * var(--af-text-scale)); color: var(--error-deep); }
:where(.atui, .atui-swarm) .reply-banner .rb-tag { font-family: var(--font-display); font-weight: 700; font-size: calc(12px * var(--af-text-scale)); letter-spacing: .04em;
  background: var(--accent); color: var(--accent-on, #fff); padding: 4px 10px; border-radius: 7px; }
:where(.atui, .atui-swarm) .reply-banner .rb-text { font-size: calc(12.5px * var(--af-text-scale)); color: var(--accent-deep); font-weight: 600; line-height: 1.3; }

:where(.atui, .atui-swarm, .atui-backtrack) .brain-text { font-size: calc(14px * var(--af-text-scale)); line-height: 1.5; color: var(--ink); }
:where(.atui, .atui-swarm, .atui-backtrack) .brain-text.act { font-family: var(--font-body); }
:where(.atui, .atui-swarm) .steer-row { display: inline-flex; align-items: center; gap: 7px; background: var(--instr-tint); border: 1px solid var(--instr);
  color: var(--instr-deep); border-radius: 8px; padding: 5px 10px; font-family: var(--font-mono); font-size: calc(12px * var(--af-text-scale)); font-weight: 700; }

:where(.atui, .atui-swarm) .decision-row { display: inline-flex; align-items: center; gap: 8px; background: var(--accent-tint); border: 1px solid var(--accent);
  color: var(--accent-deep); border-radius: 8px; padding: 6px 11px; font-size: calc(13px * var(--af-text-scale)); font-weight: 700; }

:where(.atui, .atui-swarm) .cost-row { display: flex; gap: 18px; }
:where(.atui, .atui-swarm) .cost-row .c-item { display: flex; flex-direction: column; gap: 2px; }
:where(.atui, .atui-swarm) .cost-row .c-val { font-family: var(--font-display); font-weight: 700; font-size: calc(17px * var(--af-text-scale)); color: var(--ink); }
:where(.atui, .atui-swarm) .cost-row .c-unit { font-size: calc(11px * var(--af-text-scale)); color: var(--ink-faint); }

/* answer card */
:where(.atui, .atui-swarm) .answer-card { padding: 2px 0 0; }
:where(.atui, .atui-swarm) .answer-card .ac-head { font-family: var(--font-display); font-weight: 700; font-size: calc(15px * var(--af-text-scale)); color: var(--answer-deep); margin: 8px 0 10px; line-height: 1.25; }
:where(.atui, .atui-swarm) .answer-card ul { margin: 0 0 12px; padding: 0; list-style: none; display: flex; flex-direction: column; gap: 6px; }
:where(.atui, .atui-swarm) .answer-card ul li { font-size: calc(13px * var(--af-text-scale)); color: var(--ink); padding-left: 16px; position: relative; line-height: 1.35; }
:where(.atui, .atui-swarm) .answer-card ul li::before { content: ""; position: absolute; left: 2px; top: 7px; width: 6px; height: 6px; border-radius: 50%; background: var(--answer); }
:where(.atui, .atui-swarm) .budget-tbl { width: 100%; border-collapse: collapse; margin-bottom: 12px; }
:where(.atui, .atui-swarm) .budget-tbl td { font-size: calc(12.5px * var(--af-text-scale)); padding: 6px 0; border-bottom: 1px solid var(--line-soft); }
:where(.atui, .atui-swarm) .budget-tbl td:last-child { text-align: right; font-family: var(--font-mono); font-weight: 700; }
:where(.atui, .atui-swarm) .budget-tbl tr:last-child td { border-bottom: 0; color: var(--answer-deep); font-weight: 700; }
:where(.atui, .atui-swarm) .answer-cta { width: 100%; background: var(--answer); color: var(--on-answer, #fff); border: 0; border-radius: 11px; padding: 11px; font-family: var(--font-display); font-weight: 700; font-size: calc(14px * var(--af-text-scale)); box-shadow: var(--shadow-sm); }

/* ======================= TIMELINE ======================= */
/* overflow visible (overriding .panel) so the legend hover-popover can escape
   the card; the track is inset by padding so it never relied on the clip */
:where(.atui, .atui-swarm) .timeline { padding: 13px 22px 20px; margin-bottom: 16px; overflow: visible; }
:where(.atui, .atui-swarm) .tl-track-wrap { position: relative; padding: 26px 4px 6px; }
:where(.atui, .atui-swarm) .tl-track { position: relative; height: 12px; border-radius: 999px; background: var(--paper-3); border: 1px solid var(--line);
  display: flex; overflow: visible; }
:where(.atui, .atui-swarm) .tl-seg { position: relative; height: 100%; border-right: 2px solid var(--paper); cursor: pointer; transition: filter .2s; }
:where(.atui, .atui-swarm) .tl-seg:first-child { border-radius: 999px 0 0 999px; }
:where(.atui, .atui-swarm) .tl-seg:last-child { border-right: 0; border-radius: 0 999px 999px 0; }
:where(.atui, .atui-swarm) .tl-seg:hover { filter: brightness(1.08) saturate(1.1); }
:where(.atui, .atui-swarm) .tl-seg.s-data { background: var(--data); } :where(.atui, .atui-swarm) .tl-seg.s-instruction { background: var(--instr); }
:where(.atui, .atui-swarm) .tl-seg.s-prompt { background: var(--rust); } :where(.atui, .atui-swarm) .tl-seg.s-answer { background: var(--answer); }
:where(.atui, .atui-swarm) .tl-seg.err { background: var(--error); }
:where(.atui, .atui-swarm) .tl-seg.s-ask { background: var(--call); }
:where(.atui, .atui-swarm) .tl-seg.s-both { background: linear-gradient(100deg, var(--data) 0 50%, var(--instr) 50% 100%); }
:where(.atui, .atui-swarm) .tl-seg.future { opacity: .26; }

/* ====== responsive / mobile (stacked layout + minimal timeline) ====== */
.atui.mobile { padding: 30px 12px 0; }
.atui.mobile .topbar { gap: 8px; padding-bottom: 10px; justify-content: center; }
.atui.mobile .agent-tag { display: none; }
.atui.mobile .task-pill { max-width: 184px; padding: 6px 11px; }
.atui.mobile .brand-name { font-size: calc(16px * var(--af-text-scale)); }
.atui.mobile .timeline { padding: 10px 13px 13px; margin-bottom: 12px; }
.atui.mobile .legend, .atui.mobile .tl-meter { display: none; }
.atui.mobile .tl-controls { gap: 9px; }
.atui.mobile .workspace { flex-direction: column; padding-bottom: 12px; }
.atui.mobile .ws-runtime { flex: 0 0 auto; height: 300px; margin-right: 0; }
.atui.mobile .splitter { display: none; }
.atui.mobile .ws-insp { flex: 1 1 auto; min-height: 260px; margin-top: 12px; }
@media (max-width: 760px) {
  .atui .workspace { flex-direction: column; }
  .atui .ws-runtime { flex: 0 0 auto; height: 300px; margin-right: 0; }
  .atui .splitter { display: none; }
  .atui .ws-insp { flex: 1 1 auto; min-height: 260px; margin-top: 12px; }
  .atui .legend, .atui .tl-meter, .atui .agent-tag { display: none; }
}

/* mobile: toggle Thinking ⇄ Notepad, minimal timeline pinned to the bottom */
:where(.atui, .atui-swarm) .m-tabs { display: flex; gap: 4px; background: var(--paper-2); border: 1px solid var(--line); border-radius: 12px; padding: 4px; margin-bottom: 12px; flex: none; }
:where(.atui, .atui-swarm) .m-tabs button { flex: 1; border: 0; background: transparent; font-family: var(--font-display); font-weight: 700; font-size: calc(13.5px * var(--af-text-scale)); color: var(--ink-soft); padding: 9px; border-radius: 9px; cursor: pointer; }
:where(.atui, .atui-swarm) .m-tabs button.on { background: var(--card); color: var(--rust); box-shadow: var(--shadow-sm); }
:where(.atui, .atui-swarm) .m-view { flex: 1; min-height: 0; display: flex; }
:where(.atui, .atui-swarm) .m-view > .panel { flex: 1; min-width: 0; }
.atui.mobile .m-view .panel-head { display: none; }
.atui.mobile .timeline { margin: 12px 0 0; flex: none; }
:where(.atui, .atui-swarm) .timeline.minimal .tl-readout, :where(.atui, .atui-swarm) .timeline.minimal .tl-meter, :where(.atui, .atui-swarm) .timeline.minimal .legend, :where(.atui, .atui-swarm) .timeline.minimal .speed-group, :where(.atui, .atui-swarm) .timeline.minimal .tl-spacer { display: none; }
:where(.atui, .atui-swarm) .timeline.minimal .tl-controls { justify-content: center; }

/* mobile: scale the brain + toolbox + callouts down so nothing crops on a narrow screen */
.atui.mobile .brain { transform: scale(.84); }
.atui.mobile .toolbox { transform: scale(.88); }
.atui.mobile .tool-out { padding: 9px 12px 7px; }
.atui.mobile .tool-out .to-ico { width: 27px; height: 27px; }
.atui.mobile .tool-out .to-name { font-size: calc(11px * var(--af-text-scale)); }
.atui.mobile .brain-label { font-size: calc(10.5px * var(--af-text-scale)); }
.atui.mobile .cloud, .atui.mobile .skilldoc { max-width: 190px; }
.atui.mobile .thoughtpos { transform: translateX(-30%); }
.atui.mobile .cloud .ctext { font-size: calc(11.5px * var(--af-text-scale)); line-height: 1.36; }
.atui.mobile .cloud .ctag, .atui.mobile .skilldoc .sd-tag { font-size: calc(15px * var(--af-text-scale)); }
.atui.mobile .skilldoc .sd-head { padding: 6px 11px; }
.atui.mobile .skilldoc .sd-list { padding: 6px 11px 9px; }
.atui.mobile .skilldoc .sd-list li { font-size: calc(11.5px * var(--af-text-scale)); }
.atui.mobile .arc-tag { font-size: calc(15px * var(--af-text-scale)); padding: 2px 11px; }
/* the dual (data+instruction) callouts stack + sit up top so they fit a portrait screen */
.atui.mobile .dual-thoughts { flex-direction: column; gap: 8px; align-items: center; top: 12px !important; bottom: auto !important; left: 50% !important; }
.atui.mobile .cloud.compact, .atui.mobile .skilldoc.compact { max-width: 180px; }
:where(.atui, .atui-swarm) .tl-seg .seg-dot { position: absolute; top: -19px; left: 50%; transform: translateX(-50%); font-size: calc(14px * var(--af-text-scale)); opacity: .8; }

/* playhead */
:where(.atui, .atui-swarm) .playhead { position: absolute; top: 20px; width: 4px; height: 24px; background: var(--ink); border-radius: 3px; transform: translateX(-50%);
  transition: left .45s cubic-bezier(.4,0,.2,1); z-index: 5; box-shadow: 0 0 0 3px var(--paper); }
:where(.atui, .atui-swarm) .playhead::after { content: ""; position: absolute; top: -7px; left: 50%; transform: translateX(-50%); width: 13px; height: 13px; border-radius: 50%; background: var(--ink); box-shadow: 0 0 0 3px var(--paper); }
:where(.atui, .atui-swarm) .tl-track-wrap.scrubbing .playhead { transition: none; }

:where(.atui, .atui-swarm) .tl-controls { display: flex; align-items: center; gap: 14px; margin-top: 16px; }
:where(.atui, .atui-swarm) .tl-btns { display: flex; align-items: center; gap: 8px; }
:where(.atui, .atui-swarm) .tl-btn { width: 38px; height: 38px; border-radius: 11px; border: 1px solid var(--line); background: transparent; color: var(--ink-soft);
  display: grid; place-items: center; transition: background .15s, border-color .15s, color .15s; }
/* stable hover — tint only, NO vertical lift (the jump read as a height change) */
:where(.atui, .atui-swarm) .tl-btn:hover { background: var(--paper-2); color: var(--ink); }
/* Back / Next are how you actually step the trace → the prominent, filled pair. */
:where(.atui, .atui-swarm) .tl-btn.nav { background: var(--rust); border-color: var(--rust-deep); color: var(--on-rust, #fff); box-shadow: var(--shadow-sm); }
:where(.atui, .atui-swarm) .tl-btn.nav:hover { background: var(--rust-deep); color: var(--on-rust, #fff); }
/* Play / Restart are secondary → calm ghost buttons, same size, no fill. */
:where(.atui, .atui-swarm) .tl-btn.play { background: transparent; color: var(--ink-soft); }
:where(.atui, .atui-swarm) .tl-btn.play:hover { background: var(--paper-2); color: var(--ink); }
:where(.atui, .atui-swarm) .tl-btn svg { width: 18px; height: 18px; }

:where(.atui, .atui-swarm) .tl-readout { display: flex; align-items: center; gap: 8px; }
:where(.atui, .atui-swarm) .tl-readout .step-n { font-family: var(--font-display); font-weight: 700; font-size: calc(15px * var(--af-text-scale)); }
:where(.atui, .atui-swarm) .tl-readout .step-n span { color: var(--ink-faint); font-weight: 500; }
:where(.atui, .atui-swarm) .tl-meter { display: flex; gap: 7px; }
:where(.atui, .atui-swarm) .tl-meter .m { font-family: var(--font-mono); font-size: calc(11.5px * var(--af-text-scale)); color: var(--ink-soft); background: var(--paper-2); border: 1px solid var(--line); border-radius: 7px; padding: 4px 8px; }
:where(.atui, .atui-swarm) .tl-spacer { flex: 1; }
:where(.atui, .atui-swarm) .speed-group { display: flex; align-items: center; gap: 5px; background: var(--paper-2); border: 1px solid var(--line); border-radius: 10px; padding: 3px; }
:where(.atui, .atui-swarm) .speed-group button { border: 0; background: transparent; color: var(--ink-soft); font-family: var(--font-mono); font-size: calc(12px * var(--af-text-scale)); font-weight: 700; padding: 5px 9px; border-radius: 7px; }
:where(.atui, .atui-swarm) .speed-group button.on { background: var(--card); color: var(--rust); box-shadow: var(--shadow-sm); }

:where(.atui, .atui-swarm) .legend { position: relative; display: flex; align-items: center; cursor: default; outline: none; }
/* compact trigger: 4 tiny swatches + "key" — the full legend is a hover tooltip */
:where(.atui, .atui-swarm) .legend-trigger { display: flex; align-items: center; gap: 6px; border: 1px solid var(--line); background: var(--paper-2); border-radius: 8px; padding: 4px 9px; color: var(--ink-soft); font-family: var(--font-mono); font-size: calc(10px * var(--af-text-scale)); font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
:where(.atui, .atui-swarm) .legend:hover .legend-trigger, :where(.atui, .atui-swarm) .legend:focus-within .legend-trigger { border-color: var(--ink-faint); color: var(--ink); }
:where(.atui, .atui-swarm) .legend .lk-dots { display: flex; gap: 2px; }
:where(.atui, .atui-swarm) .legend .lk-dots i { width: 8px; height: 8px; border-radius: 2px; display: block; }
/* the revealed legend — above the chip, right-aligned so it stays on-screen */
:where(.atui, .atui-swarm) .legend-pop { position: absolute; right: 0; bottom: calc(100% + 8px); display: flex; flex-direction: column; gap: 7px; background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; box-shadow: var(--shadow-md); white-space: nowrap; opacity: 0; visibility: hidden; transform: translateY(4px); transition: opacity .15s ease, transform .15s ease, visibility .15s; z-index: 20; }
:where(.atui, .atui-swarm) .legend:hover .legend-pop, :where(.atui, .atui-swarm) .legend:focus-within .legend-pop { opacity: 1; visibility: visible; transform: none; }
:where(.atui, .atui-swarm) .legend .lg { display: flex; align-items: center; gap: 6px; font-size: calc(11.5px * var(--af-text-scale)); color: var(--ink-soft); font-weight: 600; }
:where(.atui, .atui-swarm) .legend .sw { width: 11px; height: 11px; border-radius: 4px; }

@media (max-width: 1120px) {
  :where(.atui, .atui-swarm) .shelf { width: 150px; }
}

@media (prefers-reduced-motion: reduce) {
  :where(.atui, .atui-swarm, .atui-backtrack) .brain .eyes, :where(.atui, .atui-swarm) .cloud .ctag .dots i, :where(.atui, .atui-swarm) .task-pill .rec { animation: none !important; }
  :where(.atui-backtrack) .bt-why .rec, :where(.atui-backtrack) .bt-stamp, :where(.atui-backtrack) .bt-custody li { animation: none !important; opacity: 1; }
  :where(.atui-backtrack) .bt-meter .bt-fill, :where(.atui-backtrack) .bt-meter-val, :where(.atui-backtrack) .bt-sc-note { transition: none !important; }
}

/* ---------- <MultiAgentFlow> — multi-agent map + drill-down ---------- */
.atui-swarm { height: 100%; display: flex; flex-direction: column; max-width: 1480px; margin: 0 auto; padding: 18px 26px 0; }
:where(.atui, .atui-swarm) .swarm-bar { display: flex; align-items: center; gap: 12px; padding-bottom: 14px; flex: none; }
:where(.atui, .atui-swarm) .swarm-brand { font-family: var(--font-display); font-weight: 700; font-size: calc(19px * var(--af-text-scale)); }
:where(.atui, .atui-swarm) .swarm-task { display: flex; align-items: center; gap: 8px; font-size: calc(13.5px * var(--af-text-scale)); color: var(--ink); }
:where(.atui, .atui-swarm) .swarm-task .lbl { font-size: calc(11px * var(--af-text-scale)); text-transform: uppercase; letter-spacing: .12em; color: var(--ink-faint); font-weight: 700; }
:where(.atui, .atui-swarm) .swarm-wrap { flex: 1; min-height: 0; overflow: auto; display: grid; place-items: center; padding-bottom: 16px; }
:where(.atui, .atui-swarm) .swarm-canvas { position: relative; }
:where(.atui, .atui-swarm) .swarm-edges { position: absolute; inset: 0; pointer-events: none; overflow: visible; }
:where(.atui, .atui-swarm) .swarm-edge { stroke: var(--line); stroke-width: 2.2; }
:where(.atui, .atui-swarm) .swarm-edge.flow { stroke: var(--call); stroke-dasharray: 6 7; animation: swarmflow 1.3s linear infinite; }
@keyframes swarmflow { to { stroke-dashoffset: -26; } }
:where(.atui, .atui-swarm) .swarm-edge-head { fill: var(--call); }
:where(.atui, .atui-swarm) .swarm-edge-label { fill: var(--ink-faint); font-size: 11px; font-family: var(--font-hand); }

:where(.atui, .atui-swarm) .agent-card { position: absolute; text-align: left; cursor: pointer; background: var(--card); border: 1px solid var(--line);
  border-radius: 16px; padding: 13px 15px; box-shadow: var(--shadow-sm); transition: transform .15s, box-shadow .15s, border-color .15s; }
:where(.atui, .atui-swarm) .agent-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); border-color: var(--accent); }
:where(.atui, .atui-swarm) .agent-card .ac-status { position: absolute; top: 14px; right: 14px; width: 9px; height: 9px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 3px var(--accent-tint); }
:where(.atui, .atui-swarm) .agent-card.k-call .ac-status { animation: pulse 2s infinite; }
:where(.atui, .atui-swarm) .agent-card .ac-head2 { display: flex; align-items: center; gap: 11px; }
:where(.atui, .atui-swarm) .agent-card .ac-avatar { width: 46px; height: 44px; flex: none; position: relative; }
:where(.atui, .atui-swarm) .agent-card .ac-avatar .brain { transform: scale(.4); transform-origin: top left; }
:where(.atui, .atui-swarm) .agent-card .ac-avatar .brain-custom { width: 108px; height: 108px; }
:where(.atui, .atui-swarm) .agent-card .ac-id { min-width: 0; }
:where(.atui, .atui-swarm) .agent-card .ac-name { font-family: var(--font-display); font-weight: 700; font-size: calc(15px * var(--af-text-scale)); color: var(--ink); }
:where(.atui, .atui-swarm) .agent-card .ac-role { font-size: calc(11.5px * var(--af-text-scale)); color: var(--ink-soft); margin-top: 1px; }
:where(.atui, .atui-swarm) .agent-card .ac-meta { font-family: var(--font-mono); font-size: calc(10.5px * var(--af-text-scale)); color: var(--ink-faint); margin-top: 9px; }
:where(.atui, .atui-swarm) .agent-card .ac-drill { position: absolute; bottom: 12px; right: 14px; font-size: calc(11px * var(--af-text-scale)); font-weight: 700; color: var(--accent-deep); }

:where(.atui, .atui-swarm) .swarm-detailbar { gap: 12px; padding: 10px 14px; margin-bottom: 14px; background: var(--card); border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow-sm); }
:where(.atui, .atui-swarm) .swarm-bar .swarm-back { border: 0; background: var(--rust); color: var(--on-rust, #fff); border-radius: 9px; padding: 7px 13px; font-weight: 700; font-size: calc(12.5px * var(--af-text-scale)); cursor: pointer; box-shadow: var(--shadow-sm); white-space: nowrap; }
:where(.atui, .atui-swarm) .swarm-bar .swarm-back:hover { background: var(--rust-deep); }
:where(.atui, .atui-swarm) .swarm-bc { display: flex; align-items: center; gap: 9px; min-width: 0; }
:where(.atui, .atui-swarm) .swarm-bc-team { border: 0; background: transparent; color: var(--ink-soft); font: inherit; font-size: calc(13px * var(--af-text-scale)); font-weight: 700; cursor: pointer; padding: 0; }
:where(.atui, .atui-swarm) .swarm-bc-team:hover { color: var(--rust); text-decoration: underline; }
:where(.atui, .atui-swarm) .swarm-sep { color: var(--ink-faint); }
:where(.atui, .atui-swarm) .swarm-here { font-family: var(--font-display); font-size: calc(14px * var(--af-text-scale)); }
:where(.atui, .atui-swarm) .swarm-role { font-size: calc(11.5px * var(--af-text-scale)); color: var(--ink-soft); background: var(--paper-2); border: 1px solid var(--line); border-radius: 7px; padding: 2px 8px; }
:where(.atui, .atui-swarm) .swarm-bc-task { margin-left: auto; color: var(--ink-faint); font-size: calc(12px * var(--af-text-scale)); max-width: 40%; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
:where(.atui, .atui-swarm) .swarm-detail { flex: 1; min-height: 0; }
.swarm-detail .atui { padding: 0; height: 100%; }

/* control-flow node kinds */
:where(.atui, .atui-swarm) .flow-decision { position: absolute; display: grid; place-items: center; text-align: center;
  background: var(--instr-tint); border: 1.5px solid var(--instr); color: var(--instr-deep);
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%); font-weight: 700; font-size: calc(11.5px * var(--af-text-scale)); padding: 0 18px; box-shadow: var(--shadow-sm); }
:where(.atui, .atui-swarm) .flow-decision span { max-width: 70px; line-height: 1.15; }
:where(.atui, .atui-swarm) .flow-merge { position: absolute; display: grid; place-items: center; background: var(--paper-2); border: 1.5px solid var(--line);
  border-radius: 999px; color: var(--ink-soft); font-weight: 700; font-size: calc(11.5px * var(--af-text-scale)); }
:where(.atui, .atui-swarm) .flow-cap { position: absolute; display: grid; place-items: center; background: var(--ink); color: var(--paper);
  border-radius: 999px; font-weight: 700; font-size: calc(11px * var(--af-text-scale)); letter-spacing: .04em; text-transform: uppercase; }
:where(.atui, .atui-swarm) .flow-cap.end { background: var(--answer-deep); }

/* edge variants */
:where(.atui, .atui-swarm) .swarm-edge.loop { stroke: var(--accent, var(--rust)); stroke-dasharray: 5 6; }
:where(.atui, .atui-swarm) .swarm-edge.taken { stroke: var(--instr-deep); stroke-width: 2.8; stroke-dasharray: none; animation: none; }
:where(.atui, .atui-swarm) .swarm-edge.dim { stroke: var(--line); opacity: .7; animation: none; }
:where(.atui, .atui-swarm) .swarm-edge-head.taken { fill: var(--instr-deep); }
:where(.atui, .atui-swarm) .swarm-edge-head.dim { fill: var(--line); }

/* team time-travel + notepad + commentary */
:where(.atui, .atui-swarm) .swarm-spacer { flex: 1; }
:where(.atui, .atui-swarm) .swarm-np-toggle { border: 1px solid var(--line); background: var(--paper-2); color: var(--ink); border-radius: 9px; padding: 5px 11px; font-weight: 700; font-size: calc(12.5px * var(--af-text-scale)); cursor: pointer; }
:where(.atui, .atui-swarm) .swarm-body { flex: 1; min-height: 0; display: flex; gap: 16px; padding-bottom: 16px; }
:where(.atui, .atui-swarm) .swarm-main { flex: 1; min-width: 0; min-height: 0; display: flex; flex-direction: column; }
.atui-swarm .timeline { margin-top: 12px; flex: none; }
:where(.atui, .atui-swarm) .swarm-commentary { display: flex; align-items: center; gap: 8px; margin-top: 12px; flex: none; font-size: calc(13px * var(--af-text-scale)); color: var(--ink-soft); }
:where(.atui, .atui-swarm) .swarm-commentary b { color: var(--ink); }
:where(.atui, .atui-swarm) .swarm-commentary .sc-sep { color: var(--ink-faint); }
:where(.atui, .atui-swarm) .swarm-notepad { width: 320px; flex: none; display: flex; flex-direction: column; background: var(--card); border: 1px solid var(--line); border-radius: 18px; box-shadow: var(--shadow-sm); overflow: hidden; }
:where(.atui, .atui-swarm) .swarm-np-head { font-family: var(--font-display); font-weight: 700; font-size: calc(14px * var(--af-text-scale)); padding: 14px 16px 8px; }
:where(.atui, .atui-swarm) .agent-card.future { opacity: .48; }
:where(.atui, .atui-swarm) .agent-card.current { border-color: var(--accent); box-shadow: var(--shadow-md); }

/* ============================================================
   Accessibility — visible keyboard focus + reduced-motion.
   (Added for full keyboard/AT support; pointer users are unaffected.)
   ============================================================ */
.atui :focus-visible, .atui-swarm :focus-visible { outline: 2px solid var(--rust); outline-offset: 2px; border-radius: 8px; }
/* the timeline scrubber is a focusable role="slider" */
:where(.atui, .atui-swarm) .tl-track { outline: none; }
:where(.atui, .atui-swarm) .tl-track:focus-visible { outline: 2px solid var(--rust); outline-offset: 4px; border-radius: 8px; }

@media (prefers-reduced-motion: reduce) {
  .atui *, .atui-swarm * {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
}

/* per-step token attribution (input / output / cache-read) under the cost row */
:where(.atui, .atui-swarm) .cost-breakdown { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 10px; font-size: calc(12px * var(--af-text-scale)); color: var(--ink-soft, #6E5C49); }
:where(.atui, .atui-swarm) .cost-breakdown .cb-item { display: inline-flex; align-items: center; gap: 5px; }
:where(.atui, .atui-swarm) .cost-breakdown .cb-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--call); }
:where(.atui, .atui-swarm) .cost-breakdown .cb-dot.in { background: var(--data); }
:where(.atui, .atui-swarm) .cost-breakdown .cb-dot.out { background: var(--instr); }
:where(.atui, .atui-swarm) .cost-breakdown .cb-item.cached { color: var(--answer-deep, var(--answer)); font-weight: 600; }

/* truncation note for oversized tool I/O in the inspector code panes */
.atui .code-trunc, .atui-swarm .code-trunc { color: var(--ink-faint); font-style: italic; }

/* host deep-link affordances (only render when a linkResolver is supplied) */
:where(.atui, .atui-swarm) .insp-link { margin-left: auto; margin-right: 8px; font-size: calc(12px * var(--af-text-scale)); font-weight: 700; color: var(--rust); text-decoration: none; white-space: nowrap; }
:where(.atui, .atui-swarm) .insp-link:hover { text-decoration: underline; }
:where(.atui-swarm) .agent-card .ac-extlink { position: absolute; top: 8px; right: 9px; font-size: 13px; line-height: 1; color: var(--ink-faint); cursor: pointer; padding: 2px; border-radius: 6px; }
:where(.atui-swarm) .agent-card .ac-extlink:hover { color: var(--rust); background: var(--rust-tint); }

/* host-supplied per-step detail slot (renderDetail) — sits under the inspector sections */
:where(.atui, .atui-swarm) .insp-extra { margin-top: 12px; padding-top: 12px; border-top: 1px dashed var(--line); }

/* ─────────────────────────────────────────────────────────────────────────
   <BacktrackView> — the "why?" board. All rules scoped under .atui-backtrack
   (no host leakage), reading the same theme variables as the player.
   Beat reveal: the scene carries cumulative classes s1..s4. */
.atui-backtrack, :where(.atui-backtrack) * { box-sizing: border-box; }
.atui-backtrack {
  font-family: var(--font-body); color: var(--ink); background: var(--paper);
  border: 1px solid var(--line-soft); border-radius: var(--r-xl, 18px);
  box-shadow: var(--shadow-md);
  /* no overflow:hidden — it would break the sticky stepper (a clipping
     ancestor becomes the sticky containing scrollport); the bar and the
     stepper round their own corners instead */
}
:where(.atui-backtrack) button { font-family: inherit; cursor: pointer; }
:where(.atui-backtrack) :focus-visible { outline: 2px solid var(--rust); outline-offset: 2px; }
:where(.atui-backtrack) code { font-family: var(--font-mono); font-size: .92em; background: var(--paper-2); border: 1px solid var(--line-soft); border-radius: 5px; padding: 0 4px; }

/* top bar */
:where(.atui-backtrack) .bt-bar { display: flex; align-items: center; gap: 10px; padding: 10px 16px; border-bottom: 1px solid var(--line-soft); background: var(--card); border-radius: var(--r-xl, 18px) var(--r-xl, 18px) 0 0; }
:where(.atui-backtrack) .bt-brand { font-family: var(--font-display); font-weight: 800; font-size: calc(13px * var(--af-text-scale)); color: var(--rust-deep); }
:where(.atui-backtrack) .bt-why { display: inline-flex; align-items: center; gap: 6px; font-family: var(--font-display); font-weight: 800; font-size: calc(13px * var(--af-text-scale)); color: var(--error-deep); text-transform: uppercase; letter-spacing: .06em; }
:where(.atui-backtrack) .bt-why .rec { width: 8px; height: 8px; border-radius: 50%; background: var(--error); animation: bt-blink 1.6s ease-in-out infinite; }
@keyframes bt-blink { 0%, 100% { opacity: 1; } 50% { opacity: .35; } }
:where(.atui-backtrack) .bt-claim { flex: 1; min-width: 0; font-size: calc(13.5px * var(--af-text-scale)); color: var(--ink-soft); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
:where(.atui-backtrack) .bt-mode { font-family: var(--font-mono); font-size: calc(10.5px * var(--af-text-scale)); padding: 3px 9px; border-radius: 999px; background: var(--call-tint); color: var(--call-deep); border: 1px solid var(--line-soft); white-space: nowrap; }
:where(.atui-backtrack) .bt-mode.causal { background: var(--answer-tint); color: var(--answer-deep); }

/* scene column */
:where(.atui-backtrack) .bt-scene { max-width: 880px; margin: 0 auto; padding: 22px 22px 10px; }
:where(.atui-backtrack) .bt-kicker { font-family: var(--font-display); font-size: calc(10.5px * var(--af-text-scale)); font-weight: 800; text-transform: uppercase; letter-spacing: .08em; color: var(--error-deep); margin-bottom: 4px; }

/* beat 0 — the answer under investigation */
:where(.atui-backtrack) .bt-answer { display: flex; gap: 12px; align-items: flex-start; background: var(--card); border: 1.5px solid var(--error); border-radius: var(--r-lg, 14px); padding: 14px 16px; box-shadow: var(--shadow-sm); }
:where(.atui-backtrack) .bt-x { flex: 0 0 auto; width: 26px; height: 26px; display: grid; place-items: center; border-radius: 50%; background: var(--error); color: #fff; font-weight: 800; font-size: 14px; }
:where(.atui-backtrack) .bt-answer-text { font-size: calc(14.5px * var(--af-text-scale)); line-height: 1.45; }

/* beat 1 — who answered */
:where(.atui-backtrack) .bt-brainblock, :where(.atui-backtrack) .bt-suspectblock, :where(.atui-backtrack) .bt-folded, :where(.atui-backtrack) .bt-culprit, :where(.atui-backtrack) .bt-honesty { opacity: 0; transform: translateY(8px); transition: opacity .45s ease, transform .45s ease; }
:where(.atui-backtrack) .bt-scene.s1 .bt-brainblock,
:where(.atui-backtrack) .bt-scene.s2 .bt-suspectblock,
:where(.atui-backtrack) .bt-scene.s2 .bt-folded,
:where(.atui-backtrack) .bt-scene.s3 .bt-honesty,
:where(.atui-backtrack) .bt-scene.final .bt-culprit { opacity: 1; transform: none; }
:where(.atui-backtrack) .bt-uplink { display: flex; flex-direction: column; align-items: center; gap: 2px; padding: 2px 0; }
:where(.atui-backtrack) .bt-upstem { width: 2px; height: 16px; background: var(--line); }
:where(.atui-backtrack) .bt-upchip { font-family: var(--font-mono); font-size: calc(11px * var(--af-text-scale)); color: var(--ink-soft); }
:where(.atui-backtrack) .bt-brainrow { display: flex; align-items: center; gap: 16px; justify-content: center; padding: 6px 0 2px; }
:where(.atui-backtrack) .bt-brainfig { transform: scale(.62); transform-origin: center; margin: -16px -18px; }
:where(.atui-backtrack) .bt-brainnote { max-width: 430px; font-size: calc(13.5px * var(--af-text-scale)); line-height: 1.45; color: var(--ink-soft); }
:where(.atui-backtrack) .bt-brainnote b { color: var(--ink); }

/* beat 2 — the suspects (the provable candidate set) */
:where(.atui-backtrack) .bt-suspects { display: flex; gap: 14px; align-items: stretch; margin-top: 2px; }
:where(.atui-backtrack) .bt-suspect { flex: 1 1 0; min-width: 0; display: flex; flex-direction: column; transition: opacity .4s ease, filter .4s ease; }
:where(.atui-backtrack) .bt-stemwrap { display: flex; flex-direction: column; align-items: center; gap: 3px; padding-bottom: 4px; }
:where(.atui-backtrack) .bt-stem { width: 3px; height: 22px; background: var(--line); border-radius: 2px; }
:where(.atui-backtrack) .bt-suspect.confirmed .bt-stem { background: var(--error); }
:where(.atui-backtrack) .bt-edge { font-family: var(--font-mono); font-size: calc(10px * var(--af-text-scale)); color: var(--ink-faint); white-space: nowrap; max-width: 100%; overflow: hidden; text-overflow: ellipsis; }
:where(.atui-backtrack) .bt-edge.is-control { color: var(--instr-deep); }
:where(.atui-backtrack) .bt-su-card { position: relative; flex: 1; background: var(--card); border: 1.5px solid var(--line); border-radius: var(--r-md, 12px); padding: 12px 13px 14px; box-shadow: var(--shadow-sm); }
:where(.atui-backtrack) .bt-suspect.confirmed .bt-su-card { border-color: var(--error); box-shadow: 0 0 0 3px var(--error-tint), var(--shadow-sm); }
:where(.atui-backtrack) .bt-suspect.cleared { opacity: .55; filter: saturate(.6); }
:where(.atui-backtrack) .bt-su-head { display: flex; align-items: center; gap: 7px; margin-bottom: 4px; }
:where(.atui-backtrack) .bt-su-rank { font-family: var(--font-mono); font-size: calc(10.5px * var(--af-text-scale)); color: var(--ink-faint); }
:where(.atui-backtrack) .bt-su-kind { font-family: var(--font-display); font-size: calc(10px * var(--af-text-scale)); font-weight: 800; text-transform: uppercase; letter-spacing: .06em; padding: 2px 7px; border-radius: 999px; background: var(--instr-tint); color: var(--instr-deep); }
:where(.atui-backtrack) .bt-su-kind.k-tool { background: var(--call-tint); color: var(--call-deep); }
:where(.atui-backtrack) .bt-su-kind.k-stage, :where(.atui-backtrack) .bt-su-kind.k-arg { background: var(--paper-2); color: var(--ink-soft); }
:where(.atui-backtrack) .bt-su-name { font-family: var(--font-mono); font-weight: 700; font-size: calc(12.5px * var(--af-text-scale)); margin-bottom: 6px; }
:where(.atui-backtrack) .bt-su-text { font-size: calc(12px * var(--af-text-scale)); line-height: 1.4; color: var(--ink-soft); margin-bottom: 9px; }
/* the influence meter — the track is always the full 100%; the colored
   fill + value OVERLAY it and only land on "the scores" beat (s3) */
:where(.atui-backtrack) .bt-meter { position: relative; height: 16px; border-radius: 9px; background: var(--paper-2); border: 1px solid var(--line-soft); overflow: hidden; margin-bottom: 7px; }
:where(.atui-backtrack) .bt-meter .bt-fill { position: absolute; inset: 0 auto 0 0; border-radius: 8px; transform: scaleX(0); transform-origin: left; transition: transform .7s ease; }
:where(.atui-backtrack) .bt-scene.s3 .bt-meter .bt-fill { transform: scaleX(1); }
:where(.atui-backtrack) .bt-meter.hot .bt-fill { background: var(--error); }
:where(.atui-backtrack) .bt-meter.warm .bt-fill { background: var(--instr); }
:where(.atui-backtrack) .bt-meter.cool .bt-fill { background: var(--call); }
/* path-only upper bound: hatched fill — a 1.0 that isn't evidence */
:where(.atui-backtrack) .bt-meter.ub .bt-fill { background: repeating-linear-gradient(45deg, var(--paper-2), var(--paper-2) 4px, var(--line) 4px, var(--line) 7px); opacity: .6; }
:where(.atui-backtrack) .bt-meter-val { position: absolute; right: 5px; top: 50%; transform: translateY(-50%); font-family: var(--font-mono); font-weight: 700; font-size: calc(9.5px * var(--af-text-scale)); padding: 0 5px; border-radius: 6px; background: rgba(255, 255, 255, .82); color: var(--ink-soft); opacity: 0; transition: opacity .45s ease .25s; }
:where(.atui-backtrack) .bt-scene.s3 .bt-meter-val { opacity: 1; }
:where(.atui-backtrack) .bt-meter.hot .bt-meter-val { color: var(--error-deep); }
:where(.atui-backtrack) .bt-meter.warm .bt-meter-val { color: var(--instr-deep); }
:where(.atui-backtrack) .bt-meter.ub .bt-meter-val { color: var(--ink-faint); }
:where(.atui-backtrack) .bt-su-born { font-size: calc(11px * var(--af-text-scale)); color: var(--ink-faint); }
:where(.atui-backtrack) .bt-stamp { display: inline-block; margin-top: 9px; padding: 3px 10px; border: 2px solid var(--error); border-radius: 7px; color: var(--error-deep); background: var(--error-tint); font-family: var(--font-display); font-weight: 800; font-size: calc(11.5px * var(--af-text-scale)); letter-spacing: .04em; transform: rotate(-3deg); animation: bt-stamp-in .35s cubic-bezier(.2, 1.6, .4, 1) both; }
@keyframes bt-stamp-in { from { transform: rotate(-3deg) scale(1.6); opacity: 0; } to { transform: rotate(-3deg) scale(1); opacity: 1; } }
:where(.atui-backtrack) .bt-cleared-tag { display: inline-block; margin-top: 9px; font-family: var(--font-mono); font-size: calc(10.5px * var(--af-text-scale)); color: var(--ink-faint); }
:where(.atui-backtrack) .bt-folded { margin-top: 10px; text-align: center; font-family: var(--font-mono); font-size: calc(10.5px * var(--af-text-scale)); color: var(--ink-faint); }

/* beat 4 — the culprit's chain of custody */
:where(.atui-backtrack) .bt-culprit { margin-top: 16px; background: var(--card); border: 1.5px solid var(--error); border-radius: var(--r-lg, 14px); padding: 14px 16px; box-shadow: var(--shadow-sm); }
:where(.atui-backtrack) .bt-cu-head { font-family: var(--font-display); font-size: calc(13.5px * var(--af-text-scale)); margin-bottom: 8px; }
:where(.atui-backtrack) .bt-custody { list-style: none; margin: 0 0 10px; padding: 0; display: flex; flex-direction: column; gap: 6px; }
:where(.atui-backtrack) .bt-scene.final .bt-custody li { display: flex; gap: 10px; align-items: baseline; opacity: 0; animation: bt-hop-in .4s ease forwards; }
@keyframes bt-hop-in { from { opacity: 0; transform: translateX(-8px); } to { opacity: 1; transform: none; } }
:where(.atui-backtrack) .bt-cu-step { flex: 0 0 84px; font-family: var(--font-display); font-size: calc(10.5px * var(--af-text-scale)); font-weight: 800; text-transform: uppercase; letter-spacing: .06em; color: var(--rust-deep); text-align: right; }
:where(.atui-backtrack) .bt-cu-detail { font-size: calc(12.5px * var(--af-text-scale)); line-height: 1.4; color: var(--ink-soft); }
:where(.atui-backtrack) .bt-cu-detail code { color: var(--ink); }
:where(.atui-backtrack) .bt-cu-claim { border-top: 1px dashed var(--line); padding-top: 9px; font-size: calc(12.5px * var(--af-text-scale)); font-weight: 600; color: var(--error-deep); }

/* honesty footer — the report's claims discipline, verbatim */
:where(.atui-backtrack) .bt-honesty { margin-top: 14px; display: flex; flex-direction: column; gap: 3px; border-top: 1px dashed var(--line); padding-top: 10px; }
:where(.atui-backtrack) .bt-h-line { font-family: var(--font-mono); font-size: calc(10.5px * var(--af-text-scale)); color: var(--ink-faint); line-height: 1.5; }

/* beat stepper */
:where(.atui-backtrack) .bt-stepper { display: flex; align-items: flex-start; justify-content: center; gap: 14px; padding: 12px 16px 14px; border-top: 1px solid var(--line-soft); background: var(--card); margin-top: 14px; position: sticky; bottom: 0; z-index: 5; border-radius: 0 0 var(--r-xl, 18px) var(--r-xl, 18px); box-shadow: 0 -8px 18px -12px rgba(44, 31, 21, .35); }
:where(.atui-backtrack) .bt-nav { border: 1px solid var(--line); background: var(--paper); color: var(--ink-soft); width: 26px; height: 26px; border-radius: 50%; font-size: 15px; line-height: 1; }
:where(.atui-backtrack) .bt-nav:disabled { opacity: .35; cursor: default; }
:where(.atui-backtrack) .bt-dot { display: flex; flex-direction: column; align-items: center; gap: 4px; background: none; border: none; padding: 2px 4px; }
:where(.atui-backtrack) .bt-dot-i { width: 10px; height: 10px; border-radius: 50%; background: var(--paper-2); border: 1.5px solid var(--line); transition: background .25s ease, border-color .25s ease; }
:where(.atui-backtrack) .bt-dot.past .bt-dot-i { background: var(--rust-tint); border-color: var(--rust); }
:where(.atui-backtrack) .bt-dot.on .bt-dot-i { background: var(--rust); border-color: var(--rust-deep); }
:where(.atui-backtrack) .bt-dot-label { font-family: var(--font-display); font-size: calc(10px * var(--af-text-scale)); font-weight: 700; color: var(--ink-faint); white-space: nowrap; }
:where(.atui-backtrack) .bt-dot.on .bt-dot-label { color: var(--rust-deep); }

/* narrow screens: suspects stack */
@media (max-width: 640px) {
  :where(.atui-backtrack) .bt-suspects { flex-direction: column; }
  :where(.atui-backtrack) .bt-stemwrap { flex-direction: row; justify-content: center; }
  :where(.atui-backtrack) .bt-stem { width: 22px !important; height: 3px; }
}

/* BacktrackView — decision-point variants + the rewind player */
/* a "?" decision (mid-loop choice) instead of a ✕ bug */
:where(.atui-backtrack) .bt-answer.tone-question { border-color: var(--instr); }
:where(.atui-backtrack) .bt-answer.tone-question .bt-x { background: var(--instr); }
:where(.atui-backtrack) .bt-answer.tone-question .bt-kicker { color: var(--instr-deep); }

/* deterministic decider — the decision diamond (decide()/if-on-tool-result) */
:where(.atui-backtrack) .bt-diamond { width: 64px; height: 64px; margin: 14px 16px; transform: rotate(45deg); border-radius: 12px;
  background: linear-gradient(155deg, var(--instr-tint), var(--instr)); border: 2.5px solid #fff;
  display: grid; place-items: center; filter: drop-shadow(0 8px 16px rgba(150,70,30,.18)); }
:where(.atui-backtrack) .bt-diamond span { transform: rotate(-45deg); font-family: var(--font-display); font-weight: 800;
  font-size: 26px; color: var(--instr-deep); }

/* full hop chain on a suspect card (multi-hop paths, control hops labeled) */
:where(.atui-backtrack) .bt-su-path { display: flex; flex-direction: column; gap: 2px; margin-bottom: 8px; }
:where(.atui-backtrack) .bt-hop { font-family: var(--font-mono); font-size: calc(10px * var(--af-text-scale)); color: var(--ink-faint); line-height: 1.45; }
:where(.atui-backtrack) .bt-hop.is-control { color: var(--instr-deep); }

/* the exact-trail variant of the custody card (no causal claim — recorded hops) */
:where(.atui-backtrack) .bt-culprit.tone-exact { border-color: var(--instr); }
:where(.atui-backtrack) .bt-culprit.tone-exact .bt-cu-step { color: var(--instr-deep); }
:where(.atui-backtrack) .bt-culprit.tone-exact .bt-cu-claim { color: var(--ink-soft); }

/* custody rows double as the rewind scrubber when they carry recorded state */
:where(.atui-backtrack) .bt-custody li.has-evidence { cursor: pointer; border-radius: 8px; margin: 0 -6px; padding: 2px 6px; }
:where(.atui-backtrack) .bt-custody li.has-evidence:hover { background: var(--paper-2); }
:where(.atui-backtrack) .bt-custody li.sel { background: var(--paper-2); }
:where(.atui-backtrack) .bt-cu-eye { color: var(--rust); font-weight: 700; }

/* the rewind pane — the actual recorded state at the selected hop */
:where(.atui-backtrack) .bt-rewind { margin: 4px 0 10px; border: 1px solid var(--line-soft); border-radius: var(--r-md, 12px); overflow: hidden; }
:where(.atui-backtrack) .bt-rw-bar { display: flex; align-items: center; gap: 10px; padding: 6px 10px; background: var(--paper-2); border-bottom: 1px solid var(--line-soft); }
:where(.atui-backtrack) .bt-rw-label { font-family: var(--font-display); font-size: calc(10.5px * var(--af-text-scale)); font-weight: 800; letter-spacing: .04em; color: var(--rust-deep); white-space: nowrap; }
:where(.atui-backtrack) .bt-rw-where { flex: 1; min-width: 0; font-size: calc(11px * var(--af-text-scale)); color: var(--ink-soft); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
:where(.atui-backtrack) .bt-rw-nav { display: flex; gap: 4px; }
:where(.atui-backtrack) .bt-rw-nav button { border: 1px solid var(--line); background: var(--paper); color: var(--ink-soft); width: 22px; height: 22px; border-radius: 50%; font-size: 13px; line-height: 1; }
:where(.atui-backtrack) .bt-rw-nav button:disabled { opacity: .35; cursor: default; }
:where(.atui-backtrack) .bt-evidence { margin: 0; padding: 12px 14px; background: var(--code-bg); color: var(--code-ink);
  font-family: var(--font-mono); font-size: calc(11.5px * var(--af-text-scale)); line-height: 1.6; white-space: pre-wrap; word-break: break-word; }
:where(.atui-backtrack) .bt-mark { background: var(--error-tint); color: var(--error-deep); border-bottom: 2px solid var(--error); border-radius: 3px; padding: 0 2px; font-weight: 700; }

/* suspects pagination — real slices carry many suspects */
:where(.atui-backtrack) .bt-su-pager { display: flex; align-items: center; justify-content: flex-end; gap: 10px; margin-bottom: 6px; }
:where(.atui-backtrack) .bt-su-count { font-family: var(--font-mono); font-size: calc(10.5px * var(--af-text-scale)); color: var(--ink-faint); }

/* score-tie note — rides inside the suspect block, lands with the scores */
:where(.atui-backtrack) .bt-sc-note { margin-top: 10px; text-align: center; font-size: calc(11.5px * var(--af-text-scale)); color: var(--ink-soft); opacity: 0; transition: opacity .45s ease; }
:where(.atui-backtrack) .bt-scene.s3 .bt-sc-note { opacity: 1; }

/* <BacktrackOverlay> — desktop modal / mobile full-screen with back nav */
.atui-backtrack-overlay { position: fixed; inset: 0; z-index: 9999; background: rgba(30, 20, 12, .45); display: grid; place-items: center; padding: 26px; }
:where(.atui-backtrack-overlay) .bto-sheet { width: min(960px, 100%); max-height: 92vh; overflow: auto; border-radius: 18px; background: #FFFDFA; box-shadow: 0 24px 60px rgba(0, 0, 0, .35); }
:where(.atui-backtrack-overlay) .bto-bar { position: sticky; top: 0; z-index: 6; display: flex; align-items: center; padding: 7px 10px; background: rgba(255, 253, 250, .94); border-bottom: 1px solid rgba(0, 0, 0, .07); backdrop-filter: blur(3px); }
:where(.atui-backtrack-overlay) .bto-back { border: none; background: none; cursor: pointer; font-family: inherit; font-weight: 700; font-size: 13px; color: #95380F; padding: 4px 8px; border-radius: 8px; }
:where(.atui-backtrack-overlay) .bto-back:hover { background: rgba(192, 83, 31, .1); }
/* inside the sheet the board sheds its own card chrome */
:where(.atui-backtrack-overlay) .atui-backtrack { border: none; box-shadow: none; border-radius: 0; }
:where(.atui-backtrack-overlay) .atui-backtrack .bt-bar { border-radius: 0; }
:where(.atui-backtrack-overlay) .atui-backtrack .bt-stepper { border-radius: 0; }
@media (max-width: 640px) {
  .atui-backtrack-overlay { padding: 0; }
  :where(.atui-backtrack-overlay) .bto-sheet { width: 100%; height: 100dvh; max-height: none; border-radius: 0; }
}