:root {
    --bg: #F2F4F7;
    --surface: #FFFFFF;
    --surface-2: #E8ECF1;
    --ink: #14202B;
    --muted: #5B6B7B;
    --line: #D3DAE3;
    --accent: #0B5FA5;
    --focus: #0B5FA5;

    --source: #0F8A7A;
    --make: #B8680F;
    --deliver: #1F6FD0;
    --stock: #6D4FC2;
    --return: #B8405E;
    --flow: #2A8A5B;
    --base: #4B6A88;

    --hue: var(--accent);
    --hue-soft: color-mix(in srgb, var(--hue) 11%, var(--surface));
    --hue-line: color-mix(in srgb, var(--hue) 45%, var(--surface));

    --font-display: "Archivo", "Helvetica Neue", Arial, sans-serif;
    --font-body: "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
    --font-mono: "IBM Plex Mono", "SFMono-Regular", Menlo, Consolas, monospace;

    --radius: 6px;
    --shadow: 0 1px 2px rgba(20, 32, 43, .06), 0 6px 20px -10px rgba(20, 32, 43, .18);
  }
  @media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
      --bg: #0F151B;
      --surface: #171F27;
      --surface-2: #1F2932;
      --ink: #E6EBF0;
      --muted: #97A5B4;
      --line: #2B3744;
      --accent: #5AA9F5;
      --focus: #8CC4FA;
      --source: #2FB8A5;
      --make: #E0912E;
      --deliver: #5C9BEA;
      --stock: #A08BE8;
      --return: #E56E8A;
      --flow: #4DC08A;
      --base: #86A5C4;
      --shadow: 0 1px 2px rgba(0,0,0,.4), 0 8px 24px -12px rgba(0,0,0,.6);
    }
  }
  :root[data-theme="dark"] {
    --bg: #0F151B;
    --surface: #171F27;
    --surface-2: #1F2932;
    --ink: #E6EBF0;
    --muted: #97A5B4;
    --line: #2B3744;
    --accent: #5AA9F5;
    --focus: #8CC4FA;
    --source: #2FB8A5;
    --make: #E0912E;
    --deliver: #5C9BEA;
    --stock: #A08BE8;
    --return: #E56E8A;
    --flow: #4DC08A;
    --base: #86A5C4;
    --shadow: 0 1px 2px rgba(0,0,0,.4), 0 8px 24px -12px rgba(0,0,0,.6);
  }

  [data-hue="source"]  { --hue: var(--source); }
  [data-hue="make"]    { --hue: var(--make); }
  [data-hue="deliver"] { --hue: var(--deliver); }
  [data-hue="stock"]   { --hue: var(--stock); }
  [data-hue="return"]  { --hue: var(--return); }
  [data-hue="flow"]    { --hue: var(--flow); }
  [data-hue="base"]    { --hue: var(--base); }

  * { box-sizing: border-box; }
  body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font: 14px/1.5 var(--font-body);
    -webkit-font-smoothing: antialiased;
  }
  a { color: var(--accent); }
  button { font: inherit; color: inherit; }
  :focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }
  h1, h2, h3, h4 { font-family: var(--font-display); margin: 0; text-wrap: balance; }
  code, .mono { font-family: var(--font-mono); font-variant-ligatures: none; }
  [hidden] { display: none !important; }

  /* ---------- top bar ---------- */
  .top {
    display: flex; align-items: center; gap: 24px; flex-wrap: wrap;
    padding: 14px 28px 12px;
    background: var(--surface);
    border-bottom: 1px solid var(--line);
  }
  .brand { display: flex; align-items: baseline; gap: 12px; }
  .brand h1 {
    font-size: 20px; font-weight: 700; letter-spacing: -.01em;
    font-variation-settings: "wdth" 88;
  }
  .brand .sub { color: var(--muted); font-size: 12.5px; }
  .search {
    margin-left: auto; position: relative; flex: 0 1 380px; min-width: 240px;
  }
  .search input {
    width: 100%; padding: 8px 12px 8px 34px;
    border: 1px solid var(--line); border-radius: var(--radius);
    background: var(--bg); color: var(--ink); font: 13.5px var(--font-body);
  }
  .search input::placeholder { color: var(--muted); }
  .search svg { position: absolute; left: 11px; top: 9px; width: 16px; height: 16px; color: var(--muted); pointer-events: none; }
  .search kbd {
    position: absolute; right: 8px; top: 7px; padding: 1px 6px;
    font: 11px var(--font-mono); color: var(--muted);
    border: 1px solid var(--line); border-radius: 4px; background: var(--surface);
  }

  /* ---------- track switch ---------- */
  .tracks { display: inline-flex; align-items: center; gap: 0; border: 1px solid var(--line); border-radius: var(--radius); padding: 2px; background: var(--bg); }
  .tracks button { border: 0; background: transparent; padding: 5px 12px; border-radius: 4px; cursor: pointer; font-size: 13px; color: var(--muted); }
  .tracks button[aria-pressed="true"] { background: var(--ink); color: var(--bg); font-weight: 500; }
  .tracks kbd { margin: 0 4px 0 6px; padding: 0 5px; font: 11px var(--font-mono); color: var(--muted); border: 1px solid var(--line); border-radius: 4px; }
  .track-pill { margin-left: auto; font: 500 11px var(--font-body); letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
  .track-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 28px; }
  .track-card { text-align: left; cursor: pointer; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 18px; display: grid; gap: 4px; }
  .track-card .scor { font: 500 10.5px var(--font-body); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
  .track-card h3 { font-size: 17px; font-weight: 700; font-variation-settings: "wdth" 90; }
  .track-card p { margin: 0; font-size: 13px; color: var(--muted); max-width: 60ch; }
  body[data-track="business"] .track-card[data-track="business"],
  body[data-track="tech"] .track-card[data-track="tech"] { border-color: var(--ink); box-shadow: inset 0 0 0 1px var(--ink); }
  body[data-track="business"] .track-card[data-track="business"] .scor,
  body[data-track="tech"] .track-card[data-track="tech"] .scor { color: var(--accent); }

  /* ---------- access bar & paywall (hosted edition only) ---------- */
  .access { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; padding: 8px 28px; font-size: 13px;
    background: color-mix(in srgb, var(--accent) 9%, var(--surface)); border-bottom: 1px solid var(--line); }
  .access .banner { padding: 2px 8px; border-radius: 4px; background: var(--surface); border: 1px solid var(--line); }
  .access .back { color: var(--muted); text-decoration: none; }
  .access .back:hover { color: var(--ink); }
  .access .unlock { margin-left: auto; padding: 5px 12px; border-radius: 4px; background: var(--accent); color: #fff; text-decoration: none; font-weight: 500; }
  .station.locked .dot { border-style: dashed; font-size: 13px; }
  .station.locked .nm { color: var(--muted); }
  .paywall { margin-top: 18px; padding: 20px 22px; border: 1px dashed var(--hue-line); border-radius: var(--radius); background: var(--hue-soft); }
  .paywall h3 { font-size: 17px; font-weight: 700; font-variation-settings: "wdth" 90; margin-bottom: 6px; }
  .paywall p { margin: 0 0 10px; font-size: 13.5px; }
  .paywall .actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 14px; }
  .btn-unlock { padding: 8px 16px; border-radius: 4px; background: var(--hue); color: #fff; text-decoration: none; font-weight: 600; font-size: 13.5px; }
  .btn-plain { padding: 8px 14px; border-radius: 4px; border: 1px solid var(--line); color: var(--ink); text-decoration: none; font-size: 13.5px; background: var(--surface); }

  /* ---------- value chain ribbon ---------- */
  .chain {
    display: flex; gap: 4px; padding: 18px 28px 0; overflow-x: auto;
    background: var(--surface); border-bottom: 1px solid var(--line);
  }
  .chain button {
    --hue-soft: color-mix(in srgb, var(--hue) 9%, var(--surface));
    position: relative; flex: 1 1 0; min-width: 150px;
    padding: 10px 26px 12px 22px; border: 0; background: var(--surface-2);
    text-align: left; cursor: pointer;
    clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 50%, calc(100% - 14px) 100%, 0 100%, 14px 50%);
    transition: background .15s;
  }
  .chain button:first-child { clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 50%, calc(100% - 14px) 100%, 0 100%); border-radius: 4px 0 0 4px; }
  .chain button:hover { background: var(--hue-soft); }
  .chain button[aria-current="page"] { background: var(--hue); color: #fff; }
  .chain button[aria-current="page"] .scor,
  .chain button[aria-current="page"] .count { color: rgba(255,255,255,.8); }
  .chain .scor { display: block; font: 500 10.5px var(--font-body); letter-spacing: .08em; text-transform: uppercase; color: var(--hue); }
  .chain .name { display: block; font: 700 15px var(--font-display); font-variation-settings: "wdth" 90; margin-top: 1px; }
  .chain .count { display: block; font-size: 11.5px; color: var(--muted); margin-top: 1px; }
  .chain button:focus-visible { outline-offset: -3px; }

  main { padding: 26px 28px 48px; max-width: 1360px; margin: 0 auto; }

  /* ---------- overview ---------- */
  .lead { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 32px; align-items: start; margin-bottom: 28px; }
  .lead h2 { font-size: 30px; font-weight: 700; letter-spacing: -.015em; font-variation-settings: "wdth" 86; line-height: 1.1; }
  .lead p { margin: 10px 0 0; max-width: 62ch; color: var(--muted); font-size: 15px; }
  .legend { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px 20px; padding-top: 8px; font-size: 12.5px; color: var(--muted); }
  .legend span { display: flex; gap: 8px; align-items: center; }
  .legend i { width: 22px; height: 0; border-top: 1.5px solid var(--ink); position: relative; }
  .legend i.dashed { border-top-style: dashed; }
  .legend i::after { content: ""; position: absolute; right: -1px; top: -4px; border: 4px solid transparent; border-left: 6px solid var(--ink); }
  .legend i.dashed::after { display: none; }
  .legend b { font-weight: 500; color: var(--ink); }

  figure.map { margin: 0 0 28px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 18px 12px; overflow-x: auto; }
  figure.map svg { display: block; width: 100%; min-width: 720px; height: auto; color: var(--ink); font-family: var(--font-body); }
  figure.map figcaption { font-size: 12.5px; color: var(--muted); margin-top: 8px; max-width: 90ch; }
  .map .node rect { fill: var(--hue-soft); stroke: var(--hue); stroke-width: 1.5; }
  .map .node text.t { font: 700 15px var(--font-display); fill: var(--ink); }
  .map .node text.s { font: 11.5px var(--font-body); fill: var(--muted); }
  .map .node { cursor: pointer; }
  .map .node:hover rect { stroke-width: 2.5; }
  .map .node:focus-visible rect { stroke-width: 2.5; }
  .map .edge { fill: none; stroke: var(--muted); stroke-width: 1.4; marker-end: url(#arrow); }
  .map .lbl { font: 11px var(--font-body); fill: var(--muted); }
  .map .lbl tspan.mono, .map text.mono { font-family: var(--font-mono); }
  .map .rail rect { fill: none; stroke: var(--muted); stroke-dasharray: 5 4; stroke-width: 1.2; }
  .map .rail .t { font: 700 13px var(--font-display); fill: var(--ink); }
  .map .rail .s { font: 11px var(--font-body); fill: var(--muted); }
  .map .chip rect { fill: var(--hue-soft); stroke: var(--hue); stroke-width: 1; }
  .map .chip text { font: 500 11px var(--font-body); fill: var(--ink); }

  .cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 14px; }
  .card {
    background: var(--surface); border: 1px solid var(--line); border-top: 3px solid var(--hue);
    border-radius: var(--radius); padding: 16px 18px 14px; text-align: left; cursor: pointer;
    display: flex; flex-direction: column; gap: 8px; transition: box-shadow .15s, transform .15s;
  }
  .card:hover { box-shadow: var(--shadow); transform: translateY(-1px); }
  .card .scor { font: 500 10.5px var(--font-body); letter-spacing: .08em; text-transform: uppercase; color: var(--hue); }
  .card h3 { font-size: 18px; font-weight: 700; font-variation-settings: "wdth" 90; }
  .card p { margin: 0; color: var(--muted); font-size: 13px; }
  .card .path { margin-top: auto; padding-top: 6px; font-size: 12px; color: var(--muted); }
  .card .path b { color: var(--ink); font-weight: 500; }
  .card .mods { display: flex; flex-wrap: wrap; gap: 4px; }
  .tag { display: inline-block; padding: 1px 7px; border-radius: 4px; font: 500 11px var(--font-mono); background: var(--surface-2); color: var(--muted); }
  .tag.hue { background: var(--hue-soft); color: var(--hue); }

  /* ---------- process view ---------- */
  .phead { display: flex; align-items: flex-end; gap: 24px; flex-wrap: wrap; margin-bottom: 18px; }
  .phead .scor { font: 500 11px var(--font-body); letter-spacing: .08em; text-transform: uppercase; color: var(--hue); }
  .phead h2 { font-size: 30px; font-weight: 700; letter-spacing: -.015em; font-variation-settings: "wdth" 86; line-height: 1.1; }
  .phead p { margin: 6px 0 0; color: var(--muted); max-width: 70ch; }
  .phead .mods { display: flex; gap: 4px; flex-wrap: wrap; margin-left: auto; align-self: flex-start; }

  .rail-wrap { overflow-x: auto; margin: 0 -28px; padding: 6px 28px 10px; }
  .rail { list-style: none; margin: 0; padding: 0; display: flex; gap: 0; position: relative; min-width: max-content; }
  .rail::before { content: ""; position: absolute; left: 24px; right: 24px; top: 20px; border-top: 2px solid var(--line); }
  .rail li { flex: 1 1 0; min-width: 158px; max-width: 220px; position: relative; }
  .rail li:not(:last-child)::after {
    content: ""; position: absolute; top: 15px; right: -6px; border: 5px solid transparent; border-left: 7px solid var(--line);
  }
  .station {
    width: 100%; display: flex; flex-direction: column; align-items: center; gap: 6px;
    padding: 4px 8px 8px; border: 0; background: transparent; cursor: pointer; text-align: center; border-radius: var(--radius);
  }
  .station .dot {
    width: 32px; height: 32px; border-radius: 50%; display: grid; place-items: center;
    background: var(--surface); border: 2px solid var(--line); font: 600 13px var(--font-display); color: var(--muted);
    transition: border-color .15s, background .15s;
  }
  .station .nm { font: 600 13px var(--font-body); line-height: 1.3; }
  .station .md { font: 11px var(--font-mono); color: var(--muted); }
  .station .mv { display: flex; gap: 3px; flex-wrap: wrap; justify-content: center; }
  .station .mv span { font: 500 10.5px var(--font-mono); padding: 0 5px; border-radius: 3px; background: var(--surface-2); color: var(--muted); }
  .station:hover .dot { border-color: var(--hue); color: var(--hue); }
  .station[aria-current="step"] .dot { background: var(--hue); border-color: var(--hue); color: #fff; }
  .station[aria-current="step"] .nm { color: var(--hue); }
  .station[aria-current="step"] .mv span { background: var(--hue-soft); color: var(--hue); }

  .body { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr); gap: 20px; margin-top: 14px; align-items: start; }
  .panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
  .panel > header { padding: 12px 18px; border-bottom: 1px solid var(--line); display: flex; align-items: baseline; gap: 10px; }
  .panel > header h3 { font-size: 13px; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; color: var(--muted); }
  .panel > header .hint { font-size: 12px; color: var(--muted); margin-left: auto; }
  .flow { padding: 14px 18px 6px; }
  .flow svg { display: block; width: 100%; max-width: 420px; height: auto; color: var(--ink); }
  .flow .doc rect { fill: var(--surface); stroke: var(--line); stroke-width: 1.4; }
  .flow .doc.on rect { fill: var(--hue-soft); stroke: var(--hue); stroke-width: 2; }
  .flow .doc text.n { font: 600 13px var(--font-body); fill: var(--ink); }
  .flow .doc text.tb { font: 11px var(--font-mono); fill: var(--muted); }
  .flow .doc text.idx { font: 600 11px var(--font-display); fill: var(--muted); }
  .flow .doc.on text.idx { fill: var(--hue); }
  .flow .doc.on text.n { fill: var(--hue); }
  .flow .link { stroke: var(--line); stroke-width: 1.4; fill: none; marker-end: url(#arrow2); }
  .flow .fi { font: 10.5px var(--font-body); fill: var(--muted); }
  .flow figcaption { padding: 6px 2px 8px; font-size: 12px; color: var(--muted); }

  .detail { padding: 18px 22px 22px; }
  .detail .kicker { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-bottom: 6px; }
  .detail .kicker .n { font: 700 12px var(--font-display); color: var(--hue); }
  .detail h2 { font-size: 24px; font-weight: 700; font-variation-settings: "wdth" 88; letter-spacing: -.01em; }
  .detail .summary { margin: 10px 0 0; max-width: 68ch; font-size: 14.5px; }
  .io { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 14px; margin: 18px 0 4px; padding: 12px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
  .io dt { font: 500 10.5px var(--font-body); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); margin-bottom: 3px; }
  .io dd { margin: 0; font-size: 13px; }
  .sec { margin-top: 18px; }
  .sec h4 { font: 700 12px var(--font-display); letter-spacing: .06em; text-transform: uppercase; color: var(--muted); margin-bottom: 8px; display: flex; align-items: center; gap: 8px; }
  .sec h4::after { content: ""; flex: 1; border-top: 1px solid var(--line); }
  table.apps { width: 100%; border-collapse: collapse; font-size: 13px; }
  table.apps th { text-align: left; font: 500 11px var(--font-body); color: var(--muted); padding: 0 8px 6px 0; }
  table.apps td { padding: 5px 8px 5px 0; border-top: 1px solid var(--line); vertical-align: top; }
  table.apps td.tc { font-family: var(--font-mono); font-size: 12.5px; white-space: nowrap; color: var(--hue); }
  .docs { display: grid; gap: 6px; }
  .docs .row { display: grid; grid-template-columns: minmax(150px, 1fr) 2fr; gap: 10px; font-size: 13px; align-items: baseline; }
  .docs .tbls { display: flex; flex-wrap: wrap; gap: 4px; }
  .je { display: grid; gap: 4px; }
  .je .title { font-size: 12.5px; color: var(--muted); margin-bottom: 2px; }
  .je .ln { display: grid; grid-template-columns: 44px minmax(160px, 1fr) 1.2fr; gap: 10px; font-size: 13px; padding: 5px 0; border-top: 1px solid var(--line); align-items: baseline; }
  .je .ln:first-of-type { border-top: 0; }
  .je .side { font: 600 11.5px var(--font-mono); padding: 1px 0; color: var(--hue); }
  .je .side.cr { color: var(--muted); }
  .je .note { color: var(--muted); font-size: 12.5px; }
  .je .none { color: var(--muted); font-size: 13px; }
  .hand { display: grid; gap: 6px; }
  .hand a {
    display: grid; grid-template-columns: auto 1fr; gap: 10px; align-items: baseline;
    padding: 8px 10px; border: 1px solid var(--line); border-radius: var(--radius); text-decoration: none; color: inherit; font-size: 13px;
  }
  .hand a:hover { border-color: var(--hue-line); background: var(--hue-soft); }
  .hand .to { font: 600 12px var(--font-body); color: var(--hue); white-space: nowrap; }
  .hand .to small { display: block; font: 500 10px var(--font-body); letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
  ul.plain { margin: 0; padding-left: 18px; font-size: 13px; display: grid; gap: 4px; }
  .sysdocs { margin-top: 10px; display: flex; flex-wrap: wrap; gap: 4px; align-items: center; }
  .sysdocs .lbl { font: 500 10.5px var(--font-body); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); margin-right: 4px; }
  .impact { margin: 10px 0 0; font-size: 13px; color: var(--muted); }
  .kpis { display: flex; flex-wrap: wrap; gap: 6px; }
  .tag.kpi { background: var(--hue-soft); color: var(--ink); font-family: var(--font-body); font-size: 12px; padding: 3px 9px; }
  .kv { display: grid; gap: 0; font-size: 13px; }
  .kv .row { display: grid; grid-template-columns: minmax(180px, 1.1fr) 1.4fr; gap: 12px; padding: 6px 0; border-top: 1px solid var(--line); align-items: baseline; }
  .kv .row:first-child { border-top: 0; }
  .kv code { font-size: 12.5px; color: var(--hue); }
  .kv .where { color: var(--muted); font-size: 12.5px; }
  .kv.kinds .row { grid-template-columns: 110px 1fr; }
  .kv.kinds .tag.hue { justify-self: start; }
  .kv.kinds code { color: var(--ink); }
  .hit .proc small + small { color: var(--accent); }

  .watch { margin-top: 18px; padding: 12px 14px; border-left: 3px solid var(--hue); background: var(--hue-soft); border-radius: 0 var(--radius) var(--radius) 0; font-size: 13px; }
  .watch b { font-weight: 600; }
  .stepnav { display: flex; justify-content: space-between; gap: 10px; margin-top: 22px; }
  .stepnav button { padding: 7px 12px; border: 1px solid var(--line); background: var(--surface); border-radius: var(--radius); cursor: pointer; font-size: 13px; }
  .stepnav button:hover:not(:disabled) { border-color: var(--hue); color: var(--hue); }
  .stepnav button:disabled { opacity: .45; cursor: default; }

  /* ---------- search ---------- */
  .results h2 { font-size: 22px; font-weight: 700; font-variation-settings: "wdth" 88; margin-bottom: 4px; }
  .results .meta { color: var(--muted); font-size: 13px; margin-bottom: 16px; }
  .hits { display: grid; gap: 8px; }
  .hit {
    display: grid; grid-template-columns: 150px 1fr; gap: 16px; padding: 12px 16px; text-align: left; cursor: pointer;
    background: var(--surface); border: 1px solid var(--line); border-left: 3px solid var(--hue); border-radius: var(--radius);
  }
  .hit:hover { box-shadow: var(--shadow); }
  .hit .proc { font: 500 11px var(--font-body); letter-spacing: .06em; text-transform: uppercase; color: var(--hue); }
  .hit .proc small { display: block; text-transform: none; letter-spacing: 0; color: var(--muted); font-size: 12px; margin-top: 2px; }
  .hit .nm { font: 600 15px var(--font-body); }
  .hit .why { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 6px; }
  .hit mark { background: color-mix(in srgb, var(--hue) 22%, transparent); color: inherit; border-radius: 2px; padding: 0 1px; }
  .empty { color: var(--muted); padding: 30px 0; }

  @media (max-width: 900px) {
    .top, .chain, main { padding-left: 16px; padding-right: 16px; }
    .rail-wrap { margin: 0 -16px; padding-left: 16px; padding-right: 16px; }
    .lead, .body { grid-template-columns: 1fr; }
    .io { grid-template-columns: 1fr; }
    .track-cards { grid-template-columns: 1fr; }
    .kv .row, .kv.kinds .row { grid-template-columns: 1fr; gap: 2px; }
    .tracks kbd { display: none; }
    .hit { grid-template-columns: 1fr; gap: 6px; }
    .lead h2, .phead h2 { font-size: 24px; }
  }
  @media (prefers-reduced-motion: reduce) {
    * { transition: none !important; }
  }

/* "What it is" explainer at the top of the business track */
.detail .whatis { font-size: 15px; line-height: 1.55; color: var(--ink); margin: 0; padding: 12px 14px; border-left: 3px solid var(--hue); background: color-mix(in srgb, var(--hue) 8%, transparent); border-radius: 0 6px 6px 0; }

/* Worked examples in the business track */
.detail .examples { display: grid; gap: 12px; }
.detail .example { border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; background: var(--surface); }
.detail .ex-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 8px; font-size: 14px; color: var(--ink); }
.detail .copy { font: 600 12px var(--font-body); padding: 4px 10px; border: 1px solid var(--line); border-radius: 999px; background: transparent; color: var(--ink); cursor: pointer; }
.detail .copy:hover { border-color: var(--hue); color: var(--hue); }
.detail pre.prompt { white-space: pre-wrap; word-break: break-word; font: 13px/1.5 var(--font-mono); background: color-mix(in srgb, var(--hue) 6%, var(--surface)); border-left: 3px solid var(--hue); padding: 10px 12px; border-radius: 0 6px 6px 0; margin: 0 0 8px; color: var(--ink); }
.detail .ex-result, .detail .ex-check { font-size: 13px; line-height: 1.5; color: var(--muted); margin: 4px 0 0; }
.detail .ex-result b, .detail .ex-check b { color: var(--ink); }