/* =========================================================================
   STACK STUDIO — technical atelier canvas
   OpenAI / Codex adjacent: neutral canvas · restrained blue agent accent
   ========================================================================= */

:root {
  color-scheme: light;

  /* porcelain + ink */
  --paper: #f6f8fc;
  --paper-2: #edf2fb;
  --paper-3: #dfe7f3;
  --card: #fbfdff;
  --card-2: #f3f6fc;
  --ink: #0d0d0d;
  --ink-2: #2d3138;
  --ink-3: #626a76;
  --ink-4: #9aa3b2;
  --rule: #cfd9eb;
  --rule-strong: #a6b5cf;
  --rule-faint: #e3e9f4;

  /* accents */
  --codex-blue: #3267ff;
  --codex-blue-2: #1f4fd8;
  --codex-blue-soft: rgba(50, 103, 255, 0.12);
  --signal-green: #10a37f;
  --signal-green-soft: rgba(16, 163, 127, 0.12);
  --vermilion: var(--codex-blue);
  --vermilion-2: var(--codex-blue-2);
  --vermilion-soft: var(--codex-blue-soft);
  --moss: var(--signal-green);
  --moss-soft: var(--signal-green-soft);
  --ochre: #8f7b2f;
  --indigo: #4a5568;
  --plum: #5f5668;
  --terracotta: #6f6257;
  --slate: #3f4743;
  --aqua: #6f8eff;
  --aqua-soft: rgba(50, 103, 255, 0.11);

  /* kind palette */
  --kind-input: #6f6257;
  --kind-model: #30322f;
  --kind-api:   var(--codex-blue);
  --kind-tool:  #4a5568;
  --kind-eval:  #61665f;
  --kind-demo:  var(--codex-blue);
  --kind-ops:   #3f4743;

  /* radii + shadow */
  --r-sm: 4px;
  --r-md: 8px;
  --r-lg: 14px;
  --shadow-1: 0 1px 0 rgba(18, 25, 42, 0.05), 0 1px 2px rgba(18, 25, 42, 0.05);
  --shadow-2: 0 1px 0 rgba(18, 25, 42, 0.05), 0 16px 34px -18px rgba(18, 25, 42, 0.28);
  --shadow-3: 0 2px 0 rgba(18, 25, 42, 0.06), 0 32px 64px -26px rgba(18, 25, 42, 0.32);

  /* type */
  --display: "OpenAI Sans", "DM Sans", ui-sans-serif, -apple-system, "Helvetica Neue", sans-serif;
  --serif: "DM Serif Text", "Iowan Old Style", ui-serif, Georgia, serif;
  --sans: "OpenAI Sans", "DM Sans", ui-sans-serif, -apple-system, "Helvetica Neue", sans-serif;
  --mono: "Fragment Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  /* motion */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-soft: cubic-bezier(0.4, 0, 0.2, 1);
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 14.5px;
  line-height: 1.48;
  color: var(--ink);
  background: var(--paper);
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* paper grain / texture overlay */
.paper-grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(1100px 700px at 10% -15%, rgba(50, 103, 255, 0.07), transparent 66%),
    radial-gradient(900px 600px at 112% 110%, rgba(27, 39, 68, 0.045), transparent 62%),
    linear-gradient(115deg, rgba(50, 103, 255, 0.04), transparent 45%),
    url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence baseFrequency='0.82' numOctaves='2' seed='8' /><feColorMatrix values='0 0 0 0 0.05 0 0 0 0 0.05 0 0 0 0 0.045 0 0 0 0.035 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
  mix-blend-mode: multiply;
  opacity: 0.5;
}

button, textarea, input, select {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
}

::selection { background: var(--vermilion); color: #fff; }

/* =====================================================================
   APP SHELL — single viewport grid
   ===================================================================== */

.app {
  position: relative;
  z-index: 1;
  height: 100vh;
  display: grid;
  grid-template-columns: 360px 1fr;
  grid-template-rows: 58px 1fr;
  grid-template-areas:
    "topbar  topbar"
    "panel   workspace";
}

/* =====================================================================
   TOPBAR
   ===================================================================== */

.topbar {
  grid-area: topbar;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 24px;
  border-bottom: 1px solid var(--rule);
  background:
    linear-gradient(180deg, rgba(253, 254, 255, 0.98) 0%, rgba(247, 249, 254, 0.96) 100%);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.8) inset;
  position: relative;
}
.topbar::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -1px;
  width: min(420px, 52vw);
  height: 1px;
  transform: translateX(-50%);
  background: linear-gradient(90deg, transparent, rgba(50, 103, 255, 0.5), transparent);
}

.brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  letter-spacing: 0;
  min-width: 0;
}
.brand-mark {
  align-self: center;
  display: inline-flex;
  color: var(--ink);
  transform: translateY(0);
}
.brand-name {
  font-weight: 780;
  font-size: 18px;
  letter-spacing: -0.025em;
}
.brand-sub {
  font-family: var(--sans);
  font-style: normal;
  color: var(--ink-3);
  font-size: 13.5px;
  letter-spacing: 0;
}
.brand-sub em { font-style: normal; }

/* =====================================================================
   CONTROL PANEL (LEFT)
   ===================================================================== */

.control-panel {
  grid-area: panel;
  border-right: 1px solid var(--rule);
  background:
    linear-gradient(180deg, rgba(253, 254, 255, 0.9) 0%, rgba(246, 248, 252, 0.96) 46%, rgba(237, 242, 251, 0.98) 100%);
  padding: 28px 22px 18px 24px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  overflow-y: auto;
  position: relative;
}
.control-panel::after {
  /* hand-drafted vertical fold mark on the right edge */
  content: "";
  position: absolute;
  right: -1px;
  top: 30px;
  bottom: 30px;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--rule-strong) 40%, var(--rule-strong) 60%, transparent);
  opacity: 0.5;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--vermilion);
  font-weight: 500;
}
.eb-dot {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--vermilion);
}
.eyebrow-tiny {
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--ink-4);
}

.cp-intro h1 {
  margin: 10px 0 8px;
  font-family: var(--sans);
  font-weight: 750;
  font-size: clamp(27px, 2.1vw, 34px);
  line-height: 1;
  letter-spacing: -0.038em;
  color: var(--ink);
}
.cp-intro h1 em {
  font-family: var(--sans);
  font-style: italic;
  font-weight: 650;
  color: var(--codex-blue);
  letter-spacing: -0.045em;
}
.cp-intro .lede {
  margin: 0;
  color: var(--ink-2);
  font-size: 13px;
  max-width: 35ch;
  line-height: 1.48;
}

/* form */

.cp-form {
  display: flex;
  flex-direction: column;
  gap: 13px;
}

.field-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 6px;
}
.field-head label {
  font-size: 12.5px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.005em;
}
.field-hint {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-4);
}

textarea#workflow {
  display: block;
  width: 100%;
  resize: vertical;
  min-height: 104px;
  max-height: 210px;
  padding: 14px 15px;
  background: rgba(251, 253, 255, 0.94);
  border: 1px solid var(--rule);
  border-radius: var(--r-md);
  font-family: var(--sans);
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--ink);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.7);
  transition: border-color 180ms var(--ease), box-shadow 180ms var(--ease), background 180ms var(--ease);
}
textarea#workflow:focus {
  outline: none;
  border-color: var(--ink-2);
  background: #ffffff;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.7),
    0 0 0 3px var(--codex-blue-soft);
}
textarea#workflow::placeholder {
  color: var(--ink-4);
  font-style: italic;
}

.examples { display: flex; flex-direction: column; gap: 8px; }
.example-chips {
  display: grid;
  gap: 8px;
}
.example-chip {
  font-size: 11.7px;
  line-height: 1.25;
  padding: 7px 11px;
  border: 1px solid var(--rule);
  border-radius: 12px;
  background: rgba(251, 253, 255, 0.68);
  color: var(--ink-2);
  cursor: pointer;
  transition: all 160ms var(--ease);
  text-align: left;
  font-weight: 450;
}
.example-chip:hover {
  background: var(--card);
  border-color: var(--ink-3);
  color: var(--ink);
  transform: translateY(-1px);
}
.example-chip:active { transform: translateY(0); }

.primary-button {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 13px 15px;
  background:
    linear-gradient(135deg, #0d0d0d 0%, #151923 72%, #24345f 100%);
  color: var(--paper);
  border-radius: 13px;
  font-weight: 700;
  font-size: 13.5px;
  letter-spacing: -0.005em;
  transition: transform 160ms var(--ease), background 200ms var(--ease), box-shadow 200ms var(--ease);
  box-shadow: var(--shadow-1);
  position: relative;
  overflow: hidden;
}
.primary-button:hover {
  background:
    linear-gradient(135deg, #000 0%, #111827 62%, #254fd3 140%);
  transform: translateY(-1px);
  box-shadow: var(--shadow-2);
}
.primary-button:active { transform: translateY(0); }
.primary-button[data-loading="true"] {
  pointer-events: none;
  opacity: 0.74;
}
.primary-button[data-loading="true"]::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.18), transparent);
  animation: sweep 1.1s linear infinite;
}
@keyframes sweep {
  0%   { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}
.primary-button .pb-arrow {
  display: inline-flex;
  opacity: 0.85;
}
.primary-button:hover .pb-arrow { transform: translateX(2px); transition: transform 200ms var(--ease); }

.model-pricing-button {
  border: 1px solid #2557df;
  border-radius: 6px;
  background: #3267ff;
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 31px;
  padding: 7px 11px;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
  box-shadow:
    0 8px 20px rgba(50, 103, 255, 0.18),
    inset 0 1px 0 rgba(255, 255, 255, 0.22);
  transition:
    border-color 160ms var(--ease),
    background 160ms var(--ease),
    box-shadow 160ms var(--ease),
    transform 160ms var(--ease);
}
.model-pricing-button:hover {
  border-color: #1c4fe0;
  background: #245cff;
  box-shadow:
    0 10px 24px rgba(50, 103, 255, 0.26),
    inset 0 1px 0 rgba(255, 255, 255, 0.26);
  transform: translateY(-1px);
}
.model-pricing-button:focus-visible {
  outline: 2px solid rgba(50, 103, 255, 0.28);
  outline-offset: 3px;
}

.trace-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  align-items: center;
  gap: 0;
}
.trace-list li {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 10.5px;
  color: var(--ink-4);
  padding: 0;
  border-radius: 0;
  position: relative;
  transition: color 200ms var(--ease);
  white-space: nowrap;
}
.trace-list li + li::before {
  content: "";
  width: 30px;
  height: 1px;
  margin: 0 10px;
  background: var(--rule);
}
.trace-list li .t-num {
  font-family: var(--mono);
  font-size: 8.5px;
  color: var(--ink-4);
  letter-spacing: 0.05em;
}
.trace-list li .t-label { font-weight: 520; }
.trace-list li.done { color: var(--ink-2); }
.trace-list li.done .t-num { color: var(--moss); }
.trace-list li.done .t-label { color: var(--ink-3); }
.trace-list li.done + li::before { background: linear-gradient(90deg, var(--moss), var(--rule)); }
.trace-list li.active { color: var(--ink-2); }
.trace-list li.active .t-num { color: var(--vermilion); }

/* =====================================================================
   WORKSPACE (RIGHT) — header + canvas + inspector
   ===================================================================== */

.workspace {
  grid-area: workspace;
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: 0;
  background: #f5f8fd;
  position: relative;
}

.workspace-header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-areas:
    "title meta"
    "trace trace";
  gap: 12px 22px;
  align-items: end;
  padding: 17px 24px 11px;
  border-bottom: 1px solid var(--rule);
  background: linear-gradient(180deg, rgba(253,254,255,0.94) 0%, rgba(244, 247, 252, 0.58) 100%);
}
.ws-title-block {
  min-width: 0;
  grid-area: title;
}
.ws-title-block h2 {
  margin: 4px 0 4px;
  font-weight: 700;
  font-size: clamp(26px, 2.25vw, 36px);
  line-height: 1.08;
  letter-spacing: -0.035em;
}
.ws-summary {
  margin: 0;
  color: var(--ink-3);
  font-size: 14.5px;
  max-width: 70ch;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.ws-meta {
  grid-area: meta;
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: flex-end;
}
.workspace-header .trace-list {
  grid-area: trace;
  justify-self: start;
  min-width: 0;
  max-width: 100%;
  overflow-x: auto;
  padding-top: 2px;
  scrollbar-width: none;
}
.workspace-header .trace-list::-webkit-scrollbar { display: none; }
.meta-chip {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 7px 10px;
  border: 1px solid var(--rule);
  border-radius: 6px;
  background: var(--card);
  font-size: 11.5px;
  white-space: nowrap;
}
.meta-chip .mk {
  font-family: var(--mono);
  font-size: 8.75px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-4);
}
.meta-chip .mv { color: var(--ink); font-weight: 500; }
.meta-chip[data-key="mode"][data-mode="live_openai"] .mv { color: var(--moss); }
.meta-chip[data-key="mode"][data-mode="deterministic_fallback"] .mv { color: var(--ochre); }

/* =====================================================================
   CANVAS
   ===================================================================== */

.canvas {
  position: relative;
  overflow: hidden;
  min-height: 0;
  background:
    linear-gradient(180deg, #f9fbff 0%, #eef4ff 100%);
  cursor: grab;
  user-select: none;
}
.canvas[data-state="panning"] { cursor: grabbing; }
.canvas[data-state="dragging"] { cursor: grabbing; }

.canvas-grid {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 1px 1px, rgba(50, 103, 255, 0.14) 1px, transparent 1.5px);
  background-size: 24px 24px;
  background-position: 0 0;
  pointer-events: none;
  opacity: 0.42;
  mask-image: radial-gradient(ellipse 90% 90% at 50% 50%, #000 50%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 90% 90% at 50% 50%, #000 50%, transparent 100%);
}
.canvas-vignette {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 60% 90% at 0% 50%, rgba(50, 103, 255, 0.06), transparent 60%),
    radial-gradient(ellipse 80% 70% at 100% 0%, rgba(13, 13, 13, 0.035), transparent 60%);
}

/* the pan/zoom world */
.canvas-world {
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 0;
  transform-origin: 0 0;
  will-change: transform;
}

/* edges layer */
.canvas-edges {
  position: absolute;
  left: -20000px;
  top: -20000px;
  width: 40000px;
  height: 40000px;
  overflow: visible;
  pointer-events: none;
}
.edge-path {
  fill: none;
  stroke: var(--aqua);
  stroke-width: 1.45;
  stroke-linecap: round;
  opacity: 0;
  animation: edge-in 600ms var(--ease) forwards;
  transition: stroke 200ms var(--ease), opacity 200ms var(--ease), stroke-width 200ms var(--ease);
}
.edge-path.live { stroke: var(--vermilion); opacity: 0.95; stroke-width: 1.9; }
.edge-path.dim  { opacity: 0.12 !important; }
.edge-cap {
  fill: var(--aqua);
  opacity: 0;
  animation: edge-cap-in 400ms var(--ease) 300ms forwards;
  transition: fill 200ms var(--ease), opacity 200ms var(--ease);
}
.edge-cap.live { fill: var(--vermilion); opacity: 1; }
.edge-group.dim .edge-label,
.edge-group.dim .edge-label-bg { opacity: 0.2; }
.edge-group.live .edge-label { fill: var(--vermilion); font-weight: 600; }
@keyframes edge-in {
  from { opacity: 0; stroke-dashoffset: 16; }
  to   { opacity: 0.55; stroke-dashoffset: 0; }
}
@keyframes edge-cap-in {
  to { opacity: 0.75; }
}
.edge-label {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.04em;
  text-transform: lowercase;
  fill: var(--ink-3);
  opacity: 0;
  animation: edge-label-in 400ms var(--ease) 500ms forwards;
}
.edge-label-bg {
  fill: var(--card);
  opacity: 0;
  animation: edge-label-in 400ms var(--ease) 500ms forwards;
}
@keyframes edge-label-in { to { opacity: 1; } }

/* nodes layer */
.canvas-nodes {
  position: absolute;
  top: 0; left: 0;
}

.stage-label {
  position: absolute;
  z-index: 0;
  width: 220px;
  pointer-events: none;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-4);
  opacity: 0;
  animation: node-in 420ms var(--ease) 80ms forwards;
}
.stage-label::after {
  content: "";
  display: block;
  margin-top: 7px;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, var(--rule-strong), transparent);
}

.node {
  position: absolute;
  z-index: 1;
  width: 220px;
  cursor: grab;
  background:
    linear-gradient(180deg, rgba(253,254,255,0.99), rgba(244, 247, 253, 0.97));
  border: 1px solid var(--rule-strong);
  border-radius: 16px;
  padding: 13px 14px 14px;
  box-shadow: var(--shadow-2);
  transition: transform 220ms var(--ease), box-shadow 220ms var(--ease), border-color 220ms var(--ease);
  display: flex;
  flex-direction: column;
  gap: 6px;
  opacity: 0;
  transform: translateY(8px) scale(0.985);
  animation: node-in 420ms var(--ease) forwards;
}
@keyframes node-in {
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.node:hover {
  border-color: var(--ink-3);
  box-shadow: var(--shadow-3);
  z-index: 5;
}
.node.dragging {
  z-index: 50;
  box-shadow: var(--shadow-3), 0 0 0 3px var(--codex-blue-soft);
  cursor: grabbing !important;
  transition: none;
}
.node.highlight {
  border-color: var(--vermilion);
  box-shadow: var(--shadow-3), 0 0 0 3px var(--vermilion-soft);
}
.node-head {
  display: flex;
  align-items: center;
  gap: 8px;
}
.node-kind {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 999px;
  background: var(--paper-2);
  color: var(--ink-3);
  position: relative;
}
.node-kind::before {
  content: "";
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: currentColor;
  margin-right: 6px;
  vertical-align: middle;
  transform: translateY(-1px);
}
.node[data-kind="input"] .node-kind { color: var(--kind-input); }
.node[data-kind="model"] .node-kind { color: var(--kind-model); }
.node[data-kind="api"]   .node-kind { color: var(--kind-api); }
.node[data-kind="tool"]  .node-kind { color: var(--kind-tool); }
.node[data-kind="eval"]  .node-kind { color: var(--kind-eval); }
.node[data-kind="demo"]  .node-kind { color: var(--kind-demo); }
.node[data-kind="ops"]   .node-kind { color: var(--kind-ops); }

.node-id {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 8.5px;
  color: var(--ink-4);
  letter-spacing: 0.06em;
}
.node-label {
  font-size: 16.5px;
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.node-detail {
  font-size: 12px;
  color: var(--ink-3);
  line-height: 1.45;
}
.node-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 2px;
}
.node-badges span {
  display: inline-flex;
  align-items: center;
  min-height: 18px;
  padding: 2px 6px;
  border: 1px solid var(--rule);
  border-radius: 5px;
  background: rgba(237, 242, 251, 0.78);
  color: var(--ink-3);
  font-family: var(--mono);
  font-size: 8.25px;
  line-height: 1.15;
  letter-spacing: 0.02em;
}
.node[data-kind="api"] .node-badges span,
.node[data-kind="demo"] .node-badges span {
  border-color: rgba(50, 103, 255, 0.26);
  background: var(--codex-blue-soft);
  color: var(--codex-blue-2);
}
.node[data-kind="eval"] .node-badges span,
.node[data-kind="ops"] .node-badges span {
  border-color: rgba(16, 163, 127, 0.22);
  background: var(--signal-green-soft);
  color: #08785f;
}

/* connector dots on node sides */
.node::before, .node::after {
  content: "";
  position: absolute;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--card);
  border: 1.25px solid var(--rule-strong);
  top: 50%;
  transform: translateY(-50%);
  transition: background 200ms var(--ease), border-color 200ms var(--ease);
}
.node::before { left: -4px; }
.node::after  { right: -4px; }
.node:hover::before, .node:hover::after,
.node.highlight::before, .node.highlight::after {
  background: var(--vermilion);
  border-color: var(--vermilion);
}

/* special node — demo trigger */
.node[data-kind="demo"] {
  background: linear-gradient(180deg, #ffffff 0%, #f5f8ff 100%);
  border-color: var(--vermilion);
  border-style: solid;
}
.node[data-kind="demo"]::before, .node[data-kind="demo"]::after {
  border-color: var(--vermilion);
}
.node-action {
  margin-top: 4px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11.5px;
  font-weight: 700;
  color: var(--vermilion);
  padding: 5px 9px;
  border: 1px solid var(--vermilion);
  border-radius: 999px;
  background: var(--vermilion-soft);
  align-self: flex-start;
  transition: background 160ms var(--ease), color 160ms var(--ease);
}
.node-action:hover { background: var(--vermilion); color: var(--paper); }
.node-action[data-active="true"] { background: var(--vermilion); color: var(--paper); }
.node-action .na-glyph {
  width: 9px; height: 9px;
  border-left: 5px solid currentColor;
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
  display: inline-block;
  transform: translateY(0px);
}

/* =====================================================================
   DEMO PANEL STYLES (modal)
   ===================================================================== */

.demo-region-label {
  position: absolute;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--vermilion);
  padding-bottom: 6px;
  border-bottom: 1px dashed var(--vermilion);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  animation: node-in 600ms var(--ease) 200ms forwards;
}

.transcript {
  width: 320px;
  max-height: 280px;
  overflow-y: auto;
  padding-right: 4px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  scroll-behavior: smooth;
}
.transcript::-webkit-scrollbar { width: 6px; }
.transcript::-webkit-scrollbar-thumb { background: var(--rule-strong); border-radius: 3px; }
.transcript-empty {
  font-size: 11px;
  color: var(--ink-4);
  font-style: italic;
  padding: 6px 4px;
}

.msg {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 7px 9px;
  border-radius: 6px;
  background: var(--paper-2);
  border-left: 2px solid var(--rule-strong);
  font-size: 12px;
  line-height: 1.4;
  animation: msg-in 300ms var(--ease) backwards;
}
.msg-meta {
  font-family: var(--mono);
  font-size: 8.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-4);
}
.msg[data-speaker="founder"] { background: #fff; border-left-color: var(--ink-2); }
.msg[data-speaker="agent"] { background: var(--vermilion-soft); border-left-color: var(--vermilion); }
.msg[data-speaker="tool"] { background: var(--moss-soft); border-left-color: var(--moss); font-family: var(--mono); font-size: 10px; }
.msg[data-speaker="handoff"] { background: rgba(182, 137, 42, 0.12); border-left-color: var(--ochre); }
.msg-loading {
  position: relative;
  overflow: hidden;
  min-height: 52px;
}
.msg-loading::after {
  content: "";
  position: absolute;
  inset: 0;
  transform: translateX(-100%);
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.55), transparent);
  animation: demo-loading-sheen 1.4s linear infinite;
}
.typing-dots {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  height: 20px;
}
.typing-dots span {
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--vermilion);
  opacity: 0.35;
  animation: typing-dot 900ms var(--ease) infinite;
}
.typing-dots span:nth-child(2) { animation-delay: 130ms; }
.typing-dots span:nth-child(3) { animation-delay: 260ms; }
@keyframes demo-loading-sheen {
  to { transform: translateX(100%); }
}
@keyframes typing-dot {
  0%, 80%, 100% { transform: translateY(0); opacity: 0.32; }
  40% { transform: translateY(-3px); opacity: 0.92; }
}
@keyframes msg-in {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

.demo-input-row {
  display: flex;
  gap: 6px;
  margin-top: 4px;
}
.demo-input-row input {
  flex: 1;
  min-width: 0;
  padding: 8px 10px;
  border: 1px solid var(--rule);
  border-radius: 6px;
  background: #ffffff;
  font-size: 12.5px;
  transition: border-color 160ms var(--ease), box-shadow 160ms var(--ease);
}
.demo-input-row input:focus {
  outline: none;
  border-color: var(--vermilion);
  box-shadow: 0 0 0 3px var(--vermilion-soft);
}
.demo-input-row button {
  padding: 7px 11px;
  background: var(--ink);
  color: var(--paper);
  border-radius: 6px;
  font-size: 11px;
  font-weight: 500;
  transition: background 160ms var(--ease);
}
.demo-input-row button:hover { background: var(--vermilion); }
.demo-input-row button:disabled {
  pointer-events: none;
  opacity: 0.65;
}
.demo-input-row button[data-loading="true"] { opacity: 0.75; }

.suggestion-row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 4px;
}
.suggestion {
  font-size: 11px;
  padding: 3px 7px;
  border: 1px dashed var(--rule-strong);
  border-radius: 999px;
  background: transparent;
  color: var(--ink-3);
  transition: all 140ms var(--ease);
  text-align: left;
  cursor: pointer;
  line-height: 1.3;
}
.suggestion:hover {
  color: var(--vermilion);
  border-color: var(--vermilion);
  border-style: solid;
}

.tool-actions {
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.tool-action {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 6px 8px;
  background: var(--paper-2);
  border-radius: 5px;
  font-family: var(--mono);
  font-size: 10px;
}
.tool-action .ta-name { color: var(--ink); font-weight: 500; }
.tool-action .ta-status {
  font-size: 9px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 2px 6px;
  border-radius: 3px;
}
.tool-action[data-status="ready"] .ta-status { background: var(--moss-soft); color: var(--moss); }
.tool-action[data-status="queued"] .ta-status { background: var(--vermilion-soft); color: var(--vermilion); }
.tool-action[data-status="needs_context"] .ta-status { background: rgba(182, 137, 42, 0.18); color: var(--ochre); }

.model-plan {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--ink-2);
  line-height: 1.4;
}
.model-plan-item {
  display: flex;
  gap: 6px;
}
.model-plan-item .mp-num {
  color: var(--vermilion);
  font-weight: 600;
}

.json-block {
  font-family: var(--mono);
  font-size: 10px;
  background: #0b1020;
  color: #dbe7ff;
  padding: 10px 12px;
  border-radius: 6px;
  white-space: pre;
  overflow: auto;
  max-height: 220px;
  line-height: 1.45;
  margin: 0;
}
.json-block::-webkit-scrollbar { width: 6px; height: 6px; }
.json-block::-webkit-scrollbar-thumb { background: #30436d; border-radius: 3px; }
.json-key { color: #9db8ff; }
.json-string { color: #8ee6d2; }
.json-num { color: #9ed0ff; }
.json-bool { color: #c7b7ff; }

/* =====================================================================
   MODEL PRICING MODAL
   ===================================================================== */

.model-pricing-backdrop {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(11, 15, 27, 0.5);
  backdrop-filter: blur(6px);
  z-index: 55;
  padding: 20px 18px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 190ms var(--ease);
}
.model-pricing-backdrop[hidden] { display: none; }
.model-pricing-backdrop[data-open="true"] {
  opacity: 1;
  pointer-events: auto;
}

.model-pricing-modal {
  width: min(1040px, calc(100vw - 40px));
  max-height: min(88vh, 820px);
  background:
    linear-gradient(182deg, rgba(255, 255, 255, 0.98) 0%, var(--card-2) 100%);
  border: 1px solid var(--rule);
  border-radius: 14px;
  padding: 18px;
  box-shadow: var(--shadow-3);
  display: flex;
  flex-direction: column;
  gap: 12px;
  transform: translateY(6px);
  transition: transform 220ms var(--ease);
  overflow: hidden;
}
.model-pricing-backdrop[data-open="true"] .model-pricing-modal { transform: translateY(0); }

.model-pricing-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}
.model-pricing-title {
  margin: 2px 0 0;
  font-size: 24px;
  line-height: 1.16;
  letter-spacing: -0.025em;
}
.model-pricing-summary {
  margin: 0;
  color: var(--ink-3);
  font-size: 13.25px;
  line-height: 1.5;
}
.model-pricing-close {
  width: 30px;
  height: 30px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--ink-3);
  background: var(--paper-2);
  font-size: 15px;
  line-height: 1;
  transition:
    background 160ms var(--ease),
    color 160ms var(--ease),
    border-color 160ms var(--ease);
}
.model-pricing-close:hover {
  color: var(--ink);
  border-color: var(--ink-3);
  background: var(--card-2);
}

.model-pricing-content {
  min-height: 0;
  overflow: auto;
  padding-right: 2px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.model-pricing-hero {
  display: grid;
  grid-template-columns: minmax(190px, 0.55fr) minmax(320px, 1fr);
  gap: 12px;
  align-items: stretch;
}
.model-price-feature,
.model-price-notes,
.model-price-section {
  border: 1px solid var(--rule);
  border-radius: var(--r-md);
  background: rgba(251, 253, 255, 0.78);
  box-shadow: var(--shadow-1);
}
.model-price-feature {
  padding: 13px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.model-price-feature strong {
  display: block;
  font-size: 22px;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 6px;
}
.model-price-feature span,
.model-price-note {
  display: block;
  color: var(--ink-3);
  font-size: 12.5px;
  line-height: 1.45;
}
.model-price-notes {
  padding: 10px 12px;
  display: grid;
  gap: 6px;
}
.model-price-section {
  overflow: visible;
}
.model-price-section-head {
  padding: 10px 12px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
  border-bottom: 1px solid var(--rule);
  background: linear-gradient(180deg, rgba(251, 253, 255, 0.86), rgba(243, 246, 252, 0.8));
}
.model-price-section h3 {
  margin: 0;
  font-size: 14px;
  letter-spacing: -0.01em;
}
.model-price-section-head span {
  color: var(--ink-4);
  font-size: 11.5px;
  line-height: 1.35;
  letter-spacing: 0;
  text-align: right;
  max-width: 480px;
}
.model-price-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 8px;
  padding: 10px;
}
.model-price-card {
  min-width: 0;
  border: 1px solid var(--rule-faint);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.74);
  padding: 10px;
  display: grid;
  gap: 7px;
}
.model-price-card-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}
.model-price-card strong {
  min-width: 0;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--ink);
  overflow-wrap: anywhere;
}
.model-price-card p {
  margin: 0;
  color: var(--ink-3);
  font-size: 12px;
  line-height: 1.4;
}
.model-price-costs {
  display: grid;
  gap: 5px;
}
.model-price-costs span {
  min-width: 0;
  border: 1px solid var(--rule-faint);
  border-radius: 6px;
  background: #f4f7fc;
  padding: 5px 7px;
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 8px;
  align-items: baseline;
}
.model-price-costs em {
  display: block;
  color: var(--ink-4);
  font-family: var(--mono);
  font-size: 8px;
  font-style: normal;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.model-price-costs b {
  display: block;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  line-height: 1.25;
  text-align: right;
  overflow-wrap: anywhere;
}
.model-price-card small {
  color: var(--ink-4);
  font-size: 11px;
  line-height: 1.35;
}
.model-price-source-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}
.model-price-source-row a {
  color: var(--codex-blue);
  text-decoration: none;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: var(--card);
  padding: 5px 8px;
  font-size: 11px;
}
.model-price-source-row a:hover {
  border-color: var(--codex-blue);
}

@media (max-width: 760px) {
  .model-pricing-hero {
    grid-template-columns: 1fr;
  }
  .model-pricing-modal {
    width: min(640px, 100%);
    max-height: 92vh;
  }
}

/* =====================================================================
   DEMO MODAL
   ===================================================================== */

.demo-modal-backdrop {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(11, 15, 27, 0.48);
  backdrop-filter: blur(6px);
  z-index: 50;
  padding: 20px 18px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 190ms var(--ease);
}
.demo-modal-backdrop[hidden] { display: none; }
.demo-modal-backdrop[data-open="true"] {
  opacity: 1;
  pointer-events: auto;
}

.demo-modal {
  width: min(1120px, 96vw);
  max-height: min(90vh, 900px);
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 14px;
  padding: 18px;
  box-shadow: var(--shadow-3);
  display: flex;
  flex-direction: column;
  gap: 12px;
  transform: translateY(6px);
  transition: transform 220ms var(--ease);
  overflow: hidden;
  background-image: linear-gradient(182deg, rgba(255, 255, 255, 0.98) 0%, var(--card-2) 100%);
}
.demo-modal-backdrop[data-open="true"] .demo-modal { transform: translateY(0); }

.demo-modal-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}
.demo-modal-title {
  margin: 2px 0 0;
  font-size: 24px;
  line-height: 1.16;
  letter-spacing: -0.025em;
}
.demo-modal-summary {
  margin: 0;
  color: var(--ink-3);
  font-size: 13.25px;
  line-height: 1.5;
}
.demo-modal-scroll {
  min-height: 0;
  overflow: auto;
  padding: 0 4px 4px 0;
  scrollbar-gutter: stable;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.demo-modal-scroll::-webkit-scrollbar {
  width: 10px;
}
.demo-modal-scroll::-webkit-scrollbar-thumb {
  background: rgba(139, 153, 179, 0.46);
  border: 3px solid transparent;
  border-radius: 999px;
  background-clip: padding-box;
}
.demo-modal-scroll::-webkit-scrollbar-track {
  background: transparent;
}
.demo-modal-close {
  width: 30px;
  height: 30px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--ink-3);
  background: var(--paper-2);
  font-size: 15px;
  line-height: 1;
  transition:
    background 160ms var(--ease),
    color 160ms var(--ease),
    border-color 160ms var(--ease);
}
.demo-modal-close:hover {
  color: var(--ink);
  border-color: var(--ink-3);
  background: var(--card-2);
}

.demo-grid {
  display: grid;
  grid-template-columns: minmax(300px, 1.25fr) minmax(220px, 0.9fr);
  gap: 12px;
}
.demo-modal[data-realtime="hidden"] .demo-grid {
  grid-template-columns: 1fr;
}
.demo-card[hidden] {
  display: none;
}
.demo-panels {
  display: grid;
  grid-template-columns: repeat(2, minmax(220px, 1fr));
  gap: 12px;
}

.demo-card {
  border: 1px solid var(--rule);
  border-radius: 10px;
  background: var(--card-2);
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
}
.demo-card h3 {
  margin: 0;
  font-size: 14px;
  letter-spacing: -0.01em;
}

.realtime-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.demo-realtime-btn {
  align-self: flex-start;
  min-width: 104px;
  padding: 7px 10px;
  border-radius: 8px;
  border: 1px solid var(--ink-3);
  background: var(--ink);
  color: var(--paper);
  font-size: 12px;
  font-weight: 500;
  transition: background 160ms var(--ease), color 160ms var(--ease);
}
.demo-realtime-btn:hover:not(:disabled) {
  background: var(--vermilion);
}
.demo-realtime-btn.secondary {
  color: var(--ink-2);
  background: var(--card);
  border-color: var(--rule-strong);
}
.demo-realtime-btn.secondary:hover:not(:disabled) {
  color: #fff;
}
.demo-realtime-btn:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}
.demo-realtime-btn[data-loading="true"] {
  pointer-events: none;
  opacity: 0.7;
}

.demo-panels .demo-card #demo-transcript,
.demo-panels .demo-card #demo-plan,
.demo-panels .demo-card #demo-actions,
.demo-panels .demo-card #demo-output {
  min-height: 170px;
}

.demo-panels .demo-card #demo-transcript,
.demo-panels .demo-card #demo-actions,
.demo-panels .demo-card #demo-plan {
  max-height: min(230px, 36vh);
  overflow: auto;
}

.demo-panels .demo-card #demo-output {
  max-height: min(240px, 40vh);
  overflow: auto;
}

@media (max-width: 980px) {
  .demo-grid {
    grid-template-columns: 1fr;
  }
  .demo-panels {
    grid-template-columns: 1fr;
  }
  .demo-modal {
    width: min(640px, 100%);
    max-height: 92vh;
  }
}

.realtime-status {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--ink-3);
  padding: 6px 8px;
  background: var(--paper-2);
  border-radius: 5px;
  border: 1px dashed var(--rule-strong);
  line-height: 1.4;
}
.realtime-status[data-state="connecting"],
.realtime-status[data-state="requesting mic"] { color: var(--codex-blue); border-color: var(--codex-blue); border-style: solid; background: var(--codex-blue-soft); }
.realtime-status[data-state="listening"] { color: var(--moss); border-color: var(--moss); border-style: solid; background: var(--moss-soft); }
.realtime-status[data-state="speaking"] { color: var(--ochre); border-color: var(--ochre); border-style: solid; background: rgba(143, 123, 47, 0.12); }
.realtime-status[data-state="stopped"] { color: var(--ink-3); border-color: var(--rule-strong); border-style: solid; background: var(--card); }
.realtime-status[data-state="ready"] { color: var(--moss); border-color: var(--moss); border-style: solid; background: var(--moss-soft); }
.realtime-status[data-state="error"] { color: var(--vermilion); border-color: var(--vermilion); border-style: solid; background: var(--vermilion-soft); }

/* =====================================================================
   CANVAS UI — toolbar / legend / empty state
   ===================================================================== */

.canvas-toolbar {
  position: absolute;
  right: 18px;
  top: 16px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--rule);
  border-radius: 8px;
  background: rgba(251, 253, 255, 0.9);
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow-1);
  z-index: 10;
  font-family: var(--mono);
  font-size: 10.5px;
}
.tool {
  width: 26px;
  height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 5px;
  color: var(--ink-2);
  transition: background 140ms var(--ease), color 140ms var(--ease);
  font-size: 14px;
}
.tool:hover { background: var(--paper-2); color: var(--ink); }
.zoom-readout {
  padding: 0 6px;
  color: var(--ink-3);
  min-width: 38px;
  text-align: center;
}
.toolbar-rule { width: 1px; height: 14px; background: var(--rule); margin: 0 2px; }

.canvas-legend {
  position: absolute;
  left: 18px;
  bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.04em;
  color: var(--ink-4);
  z-index: 10;
  pointer-events: none;
}
.canvas-legend .leg-title {
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--ink-3);
  padding: 3px 7px;
  border: 1px solid var(--rule);
  border-radius: 4px;
  background: rgba(251, 253, 255, 0.86);
}

.canvas-empty {
  position: absolute;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}
.canvas[data-state="empty"] .canvas-empty { display: flex; }

.empty-card {
  text-align: center;
  max-width: 360px;
  padding: 28px 32px;
  border: 1px dashed var(--rule-strong);
  border-radius: 12px;
  background: rgba(251, 253, 255, 0.78);
  color: var(--ink-3);
  font-size: 12.5px;
  line-height: 1.5;
}
.empty-card strong {
  display: block;
  font-family: var(--display);
  font-size: 21px;
  font-weight: 400;
  color: var(--ink);
  margin: 14px 0 6px;
  letter-spacing: -0.01em;
}
.empty-glyph { color: var(--ink-3); display: inline-block; opacity: 0.8; }

.canvas-loading-trace {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  z-index: 12;
  width: min(360px, calc(100% - 42px));
  padding: 14px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.95), rgba(244, 248, 255, 0.92));
  border: 1px solid var(--rule);
  border-radius: 12px;
  box-shadow: var(--shadow-1);
  display: none;
  overflow: hidden;
  pointer-events: none;
  contain: paint;
}
.canvas-loading-trace::before,
.canvas-loading-trace::after {
  content: "";
  position: absolute;
  pointer-events: none;
}
.canvas-loading-trace::before {
  inset: 0;
  background:
    repeating-linear-gradient(
      115deg,
      transparent 0 14px,
      rgba(50,103,255,0.035) 14px 15px,
      transparent 15px 28px
    );
}
.canvas-loading-trace::after {
  inset: -30% -60%;
  background: linear-gradient(
    90deg,
    transparent 34%,
    rgba(50,103,255,0.12) 50%,
    transparent 66%
  );
  transform: translate3d(-58%, 0, 0);
  will-change: transform;
  animation: canvas-trace-shimmer 3.8s linear infinite;
}
.canvas[data-state="loading"] .canvas-loading-trace,
.canvas-loading-trace[data-state="error"] {
  display: block;
}
.canvas[data-state="loading"] .canvas-world {
  opacity: 0.28;
  filter: saturate(0.7);
  transition: opacity 180ms var(--ease), filter 180ms var(--ease);
}
.clt-head,
.clt-steps {
  position: relative;
  z-index: 1;
}
.clt-head {
  display: grid;
  gap: 4px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--rule-faint);
}
.clt-kicker {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--codex-blue);
}
.clt-current {
  color: var(--ink);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: -0.01em;
}
.clt-steps {
  list-style: none;
  display: grid;
  gap: 6px;
  padding: 10px 0 0;
  margin: 0;
}
.clt-steps li {
  display: grid;
  grid-template-columns: 24px 1fr;
  gap: 8px;
  align-items: center;
  color: var(--ink-4);
  font-size: 11.5px;
}
.clt-index {
  font-family: var(--mono);
  color: inherit;
}
.clt-label {
  min-width: 0;
}
.clt-steps li[data-state="done"] {
  color: var(--moss);
}
.clt-steps li[data-state="active"] {
  color: var(--ink);
}
.clt-steps li[data-state="active"] .clt-index {
  color: var(--codex-blue);
  animation: canvas-step-pulse 1.1s var(--ease) infinite;
}
.canvas-loading-trace[data-state="error"] {
  border-color: rgba(182, 76, 54, 0.34);
  background:
    linear-gradient(180deg, rgba(255, 252, 250, 0.98), rgba(255, 244, 241, 0.94));
}
.canvas-loading-trace[data-state="error"]::after {
  inset: 0;
  animation: none;
  transform: none;
  background:
    linear-gradient(90deg, transparent, rgba(182,76,54,0.08), transparent);
}
.canvas-loading-trace[data-state="error"] .clt-kicker,
.canvas-loading-trace[data-state="error"] .clt-steps li[data-state="error"] {
  color: var(--vermilion);
}
.clt-error-detail {
  color: var(--ink-3);
  font-size: 11.5px;
  line-height: 1.4;
}
@keyframes canvas-trace-shimmer {
  from { transform: translate3d(-58%, 0, 0); }
  to   { transform: translate3d(58%, 0, 0); }
}
@keyframes canvas-step-pulse {
  0%, 100% { opacity: 0.55; }
  50% { opacity: 1; }
}

/* =====================================================================
   INSPECTOR (bottom drawer)
   ===================================================================== */

.inspector {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--rule);
  background: rgba(244, 247, 252, 0.96);
  max-height: 38vh;
  transition: max-height 320ms var(--ease);
}
.inspector[data-open="false"] { max-height: 42px; }

.inspector-tabs {
  display: flex;
  align-items: center;
  gap: 0;
  height: 42px;
  padding: 0 18px;
  overflow-x: auto;
  border-bottom: 1px solid var(--rule);
}
.inspector-tabs::-webkit-scrollbar { display: none; }

.ins-tab {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 0 12px;
  height: 100%;
  font-size: 11px;
  color: var(--ink-3);
  font-weight: 500;
  letter-spacing: -0.005em;
  border-radius: 0;
  position: relative;
  transition: color 160ms var(--ease);
  white-space: nowrap;
}
.ins-tab .it-key {
  font-family: var(--mono);
  font-size: 8.5px;
  letter-spacing: 0.08em;
  color: var(--ink-4);
}
.ins-tab:hover { color: var(--ink); }
.ins-tab[aria-selected="true"] { color: var(--vermilion); }
.ins-tab[aria-selected="true"]::after {
  content: "";
  position: absolute;
  left: 12px; right: 12px;
  bottom: -1px;
  height: 1.5px;
  background: var(--vermilion);
}
.ins-tab[aria-selected="true"] .it-key { color: var(--vermilion); }
.ins-spacer { flex: 1; }
.ins-close {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-4);
  padding: 4px 8px;
  border: 1px solid var(--rule);
  border-radius: 4px;
  background: var(--card);
  transition: all 160ms var(--ease);
}
.ins-close:hover { color: var(--ink); border-color: var(--ink-3); }

.inspector-content {
  flex: 1;
  overflow-y: auto;
  padding: 16px 22px 18px;
  font-size: 13px;
  line-height: 1.55;
  color: var(--ink-2);
}
.inspector[data-open="false"] .inspector-content { display: none; }

.ins-placeholder {
  color: var(--ink-4);
  font-style: italic;
  font-size: 12px;
}

.ins-panel {
  display: grid;
  grid-template-columns: minmax(240px, 1fr) minmax(240px, 1fr) minmax(240px, 1fr);
  gap: 18px;
}
.ins-panel > * { min-width: 0; }
.ins-panel-title {
  font-size: 18.5px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 0 0 8px;
  grid-column: 1 / -1;
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.ins-panel-title .ipt-num {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--vermilion);
  font-weight: 500;
}
.ins-list {
  padding: 0;
  margin: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.ins-list li {
  position: relative;
  padding-left: 16px;
  font-size: 12.75px;
  line-height: 1.5;
  color: var(--ink-2);
}
.ins-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--vermilion);
  font-weight: 500;
}

.eval-card {
  padding: 12px;
  border: 1px solid var(--rule);
  border-radius: 8px;
  background: var(--card);
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.eval-card strong {
  font-size: 14px;
  font-weight: 800;
  letter-spacing: -0.005em;
  color: var(--ink);
}
.eval-card .eval-prompt { font-size: 12.25px; color: var(--ink-2); }
.eval-card .eval-criteria {
  font-size: 11.75px;
  color: var(--ink-3);
  font-style: italic;
  border-top: 1px dashed var(--rule);
  padding-top: 6px;
}
.eval-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 10px;
  grid-column: 1 / -1;
}

.source-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  grid-column: 1 / -1;
}
.source-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border: 1px solid var(--rule);
  border-radius: 6px;
  background: var(--card);
  color: var(--ink);
  text-decoration: none;
  font-size: 11px;
  transition: border-color 160ms var(--ease), color 160ms var(--ease);
}
.source-link::after { content: "↗"; color: var(--vermilion); }
.source-link:hover { border-color: var(--vermilion); color: var(--vermilion); }

/* =====================================================================
   RESPONSIVE
   ===================================================================== */

@media (max-width: 1100px) {
  .app { grid-template-columns: 320px 1fr; }
}
@media (max-width: 880px) {
  body { overflow: auto; }
  .app {
    height: auto;
    grid-template-columns: 1fr;
    grid-template-rows: 58px auto 1fr;
    grid-template-areas: "topbar" "panel" "workspace";
  }
  .control-panel { border-right: none; border-bottom: 1px solid var(--rule); }
  .canvas { min-height: 70vh; }
}