:root {
    --ground: #14151b; --surface: #1b1d25; --surface-2: #22242f; --line: #2b2d38;
    --ink: #e7e3d9; --ink-dim: #b4b0a8; --muted: #86848f;
    --voice: #df8a52; --voice-dim: #c9773f; --voice-wash: rgba(223,138,82,0.10);
    --machine: #7f9cbb; --machine-wash: rgba(127,156,187,0.10); --broken: #6f6d78;
    --done: #6f8f77;

    --font-voice: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
    --font-body: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-machine: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Code", Menlo, Consolas, monospace;

    --measure: 66ch;
    --pad: clamp(1.1rem, 4vw, 2.5rem);
    --s1: 0.5rem; --s2: 1rem; --s3: 1.75rem; --s4: 3rem; --s5: 5rem;
  }
  @media (prefers-color-scheme: light) {
    :root {
      --ground: #efece5; --surface: #f6f3ec; --surface-2: #eae6dc; --line: #dcd6ca;
      --ink: #22212a; --ink-dim: #45434f; --muted: #6f6c78;
      --voice: #b25a2b; --voice-dim: #9a4c22; --voice-wash: rgba(178,90,43,0.08);
      --machine: #4d6f97; --machine-wash: rgba(77,111,151,0.08); --broken: #86848f;
      --done: #4f7a5f;
    }
  }
  :root[data-theme="dark"] {
    --ground: #14151b; --surface: #1b1d25; --surface-2: #22242f; --line: #2b2d38;
    --ink: #e7e3d9; --ink-dim: #b4b0a8; --muted: #86848f;
    --voice: #df8a52; --voice-dim: #c9773f; --voice-wash: rgba(223,138,82,0.10);
    --machine: #7f9cbb; --machine-wash: rgba(127,156,187,0.10); --broken: #6f6d78; --done: #6f8f77;
  }
  :root[data-theme="light"] {
    --ground: #efece5; --surface: #f6f3ec; --surface-2: #eae6dc; --line: #dcd6ca;
    --ink: #22212a; --ink-dim: #45434f; --muted: #6f6c78;
    --voice: #b25a2b; --voice-dim: #9a4c22; --voice-wash: rgba(178,90,43,0.08);
    --machine: #4d6f97; --machine-wash: rgba(77,111,151,0.08); --broken: #86848f; --done: #4f7a5f;
  }

  * { box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  @media (prefers-reduced-motion: reduce){ html { scroll-behavior: auto; } }
  body {
    margin: 0; background: var(--ground); color: var(--ink);
    font-family: var(--font-body); font-size: 1.0625rem; line-height: 1.65;
    -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
  }
  .wrap { max-width: 74rem; margin: 0 auto; padding-inline: var(--pad); }
  .col { max-width: var(--measure); }
  h1, h2, h3 { text-wrap: balance; line-height: 1.15; margin: 0; }
  a { color: var(--voice); text-underline-offset: 3px; text-decoration-thickness: 1px; }
  a:hover { color: var(--voice-dim); }
  :focus-visible { outline: 2px solid var(--voice); outline-offset: 3px; border-radius: 2px; }
  .eyebrow { font-family: var(--font-machine); font-size: 0.72rem; letter-spacing: 0.22em; text-transform: uppercase; color: var(--muted); }

  /* ---- nav ---- */
  nav.bar { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding-block: 1.1rem; border-bottom: 1px solid var(--line); flex-wrap: wrap; }
  nav .mark { font-family: var(--font-voice); font-weight: 600; font-size: 1.15rem; }
  nav .mark .flame { color: var(--voice); font-style: italic; }
  nav .links { display: flex; align-items: center; gap: 1.4rem; font-family: var(--font-machine); font-size: 0.82rem; }
  nav .links a { color: var(--ink-dim); text-decoration: none; }
  nav .links a:hover { color: var(--voice); }
  .theme-toggle { display: inline-flex; align-items: center; gap: 0.4rem; background: none; border: 1px solid var(--line); color: var(--ink-dim); font-family: var(--font-machine); font-size: 0.78rem; padding: 0.3rem 0.65rem; border-radius: 6px; cursor: pointer; }
  .theme-toggle svg { display: block; }
  .theme-toggle:hover { border-color: var(--voice); color: var(--voice); }
  .links a.btn-github { display: inline-flex; align-items: center; gap: 0.45rem; color: var(--ink); border: 1px solid var(--line); border-radius: 6px; padding: 0.3rem 0.7rem; }
  .links a.btn-github svg { display: block; }
  .links a.btn-github:hover { border-color: var(--voice); color: var(--voice); }
  .foot-links a.btn-github { color: var(--voice); }
  .notice-bar { display: flex; gap: 0.75rem; align-items: flex-start; margin-top: var(--s4); padding: 0.9rem 1.1rem; border: 1px solid var(--line); border-left: 3px solid var(--voice); border-radius: 8px; background: var(--voice-wash); font-size: 0.92rem; color: var(--ink-dim); }
  .notice-bar .ic { flex: none; color: var(--voice); font-family: var(--font-machine); font-weight: 700; }
  .notice-bar b { color: var(--ink); }
  .notice-bar a { white-space: nowrap; }

  /* ---- header ---- */
  header.top { padding-block: var(--s4) var(--s4); border-bottom: 1px solid var(--line);
    background: radial-gradient(120% 90% at 82% -10%, var(--voice-wash), transparent 60%); }
  .brand { font-family: var(--font-voice); font-weight: 600; font-size: clamp(2.6rem, 8vw, 5rem); letter-spacing: -0.01em; margin-block: var(--s2) var(--s2); }
  .brand .flame { color: var(--voice); font-style: italic; }
  .lede { font-size: clamp(1.05rem, 2.4vw, 1.3rem); color: var(--ink-dim); max-width: 48ch; }
  .epigraph { font-family: var(--font-voice); font-style: italic; color: var(--muted); font-size: 1.05rem; margin-top: var(--s3); }
  @keyframes flicker { 0%,100%{opacity:1;} 45%{opacity:0.82;} 70%{opacity:0.94;} }
  .flame-mark { display:inline-block; animation: flicker 4.5s ease-in-out infinite; color: var(--voice); }
  @media (prefers-reduced-motion: reduce){ .flame-mark { animation: none; } }

  section { padding-block: var(--s5); border-bottom: 1px solid var(--line); }
  .kicker { display: flex; align-items: baseline; gap: 0.9rem; margin-bottom: var(--s3); }
  .kicker h2 { font-family: var(--font-voice); font-weight: 600; font-size: clamp(1.5rem, 4vw, 2.15rem); }
  .kicker .num { font-family: var(--font-machine); font-size: 0.8rem; color: var(--voice); letter-spacing: 0.1em; padding-top: 0.4rem; }
  .note { color: var(--muted); font-size: 0.95rem; }

  .prompt-line { font-family: var(--font-machine); font-size: 0.95rem; color: var(--ink-dim); margin-bottom: var(--s3); }
  .prompt-line b { color: var(--ink); background: var(--voice-wash); padding: 0.1em 0.45em; border-radius: 3px; }
  .fork { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
  @media (max-width: 720px) { .fork { grid-template-columns: 1fr; } }
  .panel { background: var(--surface); padding: clamp(1.1rem, 3vw, 2rem); }
  .panel .tag { display: flex; align-items: center; gap: 0.55rem; font-family: var(--font-machine); font-size: 0.74rem; letter-spacing: 0.12em; text-transform: uppercase; margin-bottom: var(--s2); }
  .dot { width: 9px; height: 9px; border-radius: 50%; flex: none; }
  .panel.machine .dot { background: var(--machine); } .panel.voice .dot { background: var(--voice); }
  .panel.machine .tag { color: var(--machine); } .panel.voice .tag { color: var(--voice); }
  .panel .verdict { color: var(--muted); text-transform: none; letter-spacing: 0; font-family: var(--font-body); }
  .out-machine { font-family: var(--font-machine); font-size: 0.9rem; line-height: 1.6; color: var(--ink-dim); }
  .out-voice { font-family: var(--font-voice); font-size: 1.12rem; line-height: 1.62; }
  .out-voice .q, .said .q { color: var(--voice-dim); }
  .fork-foot { margin-top: var(--s3); }

  .arc { display: grid; gap: 1.25rem; }
  .stage { display: grid; grid-template-columns: minmax(0,1fr) auto; gap: 1.25rem 2rem; align-items: start; padding: clamp(1.1rem,3vw,1.75rem); background: var(--surface); border: 1px solid var(--line); border-radius: 10px; border-left: 3px solid var(--stage, var(--broken)); }
  @media (max-width: 640px){ .stage { grid-template-columns: 1fr; } }
  .stage.tiny { --stage: var(--broken); } .stage.base { --stage: var(--machine); } .stage.v1 { --stage: var(--voice); }
  .stage h3 { font-family: var(--font-machine); font-size: 0.95rem; letter-spacing: 0.02em; margin-bottom: 0.5rem; }
  .stage .who { color: var(--stage, var(--ink)); }
  .stage .said { font-family: var(--font-voice); font-size: 1.06rem; line-height: 1.6; color: var(--ink-dim); }
  .stage.v1 .said { color: var(--ink); }
  .metric { text-align: right; font-family: var(--font-machine); min-width: 8.5rem; }
  .metric .big { font-size: 1.7rem; color: var(--ink); font-variant-numeric: tabular-nums; display:block; }
  .metric.v1 .big { color: var(--voice); }
  .metric .lbl { font-size: 0.68rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); }

  .stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border:1px solid var(--line); border-radius: 10px; overflow: hidden; }
  @media (max-width: 720px){ .stats { grid-template-columns: repeat(2,1fr);} }
  .stat { background: var(--surface); padding: clamp(1rem,3vw,1.5rem); }
  .stat .v { font-family: var(--font-machine); font-size: clamp(1.5rem,4vw,2rem); font-variant-numeric: tabular-nums; color: var(--ink); }
  .stat.hi .v { color: var(--voice); }
  .stat .k { font-size: 0.8rem; color: var(--muted); margin-top: 0.35rem; }
  .bars { margin-top: var(--s3); display: grid; gap: 0.85rem; }
  .bar-row { display: grid; grid-template-columns: 7.5rem 1fr 4rem; align-items: center; gap: 1rem; }
  @media (max-width:520px){ .bar-row{ grid-template-columns: 6rem 1fr 3.4rem; } }
  .bar-row .name { font-family: var(--font-machine); font-size: 0.82rem; color: var(--ink-dim); }
  .track { height: 12px; background: var(--surface-2); border-radius: 6px; overflow: hidden; }
  .fill { display: block; height: 100%; border-radius: 6px; min-width: 3px; }
  .fill.tiny { background: var(--broken); } .fill.base { background: var(--machine); } .fill.v1 { background: var(--voice); }
  .bar-row .val { font-family: var(--font-machine); font-variant-numeric: tabular-nums; text-align: right; font-size: 0.9rem; }

  .gallery { display: grid; grid-template-columns: repeat(2,1fr); gap: 1.25rem; }
  @media (max-width: 720px){ .gallery { grid-template-columns: 1fr; } }
  .card { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: clamp(1.1rem,3vw,1.6rem); }
  .card .chip { display: inline-flex; align-items: center; gap: 0.5rem; font-family: var(--font-machine); font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); margin-bottom: var(--s2); }
  .card .said { font-family: var(--font-voice); font-size: 1.05rem; line-height: 1.6; }
  .card.v1 { border-left: 3px solid var(--voice); } .card.base { border-left: 3px solid var(--machine); } .card.tiny { border-left: 3px solid var(--broken); }

  /* ---- roadmap strip ---- */
  .road { display: flex; gap: 0.6rem; overflow-x: auto; padding-bottom: 0.5rem; }
  .phase { flex: 1 0 auto; min-width: 8.5rem; background: var(--surface); border: 1px solid var(--line); border-top: 3px solid var(--pc, var(--muted)); border-radius: 8px; padding: 0.9rem 1rem; }
  .phase.done { --pc: var(--done); } .phase.now { --pc: var(--voice); background: var(--voice-wash); } .phase.next { --pc: var(--machine); } .phase.later { --pc: var(--muted); }
  .phase .p-st { font-family: var(--font-machine); font-size: 0.62rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--pc, var(--muted)); }
  .phase .p-nm { margin-top: 0.35rem; font-size: 0.95rem; color: var(--ink); }
  .phase.now .p-nm { color: var(--voice); font-weight: 600; }
  .rm-groups { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; margin-top: var(--s3); }
  @media (max-width: 780px){ .rm-groups { grid-template-columns: 1fr; } }
  .rm-group { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: clamp(1.1rem,3vw,1.5rem); border-top: 3px solid var(--gc, var(--muted)); }
  .rm-group.done { --gc: var(--done); } .rm-group.next { --gc: var(--voice); } .rm-group.later { --gc: var(--machine); }
  .rm-group h3 { font-family: var(--font-machine); font-size: 0.78rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--gc, var(--ink)); margin-bottom: 0.3rem; }
  .rm-group .g-sub { font-size: 0.85rem; color: var(--muted); margin-bottom: var(--s2); }
  .rm-group ul { margin: 0; padding-left: 1.05rem; }
  .rm-group li { margin-bottom: 0.7rem; color: var(--ink-dim); font-size: 0.94rem; }
  .rm-group li b { color: var(--ink); font-weight: 600; }
  .rm-group li::marker { color: var(--gc, var(--muted)); }

  /* ---- glossary ---- */
  .glossary { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
  @media (max-width: 640px){ .glossary { grid-template-columns: 1fr; } }
  .glossary div { background: var(--surface); padding: 1.1rem 1.3rem; }
  .glossary dt { font-family: var(--font-machine); font-size: 0.82rem; color: var(--voice); margin-bottom: 0.3rem; }
  .glossary dd { margin: 0; color: var(--ink-dim); font-size: 0.95rem; }

  .spec { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
  @media (max-width: 640px){ .spec { grid-template-columns: 1fr; } }
  .spec div { background: var(--surface); padding: 1.1rem 1.3rem; }
  .spec dt { font-family: var(--font-machine); font-size: 0.7rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); margin-bottom: 0.3rem; }
  .spec dd { margin: 0; color: var(--ink); } .spec dd small { color: var(--ink-dim); }

  .honesty { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }
  @media (max-width: 640px){ .honesty { grid-template-columns: 1fr; } }
  .honesty .box { padding: clamp(1.1rem,3vw,1.6rem); border-radius: 10px; border: 1px solid var(--line); background: var(--surface); }
  .honesty .box h3 { font-family: var(--font-machine); font-size: 0.78rem; letter-spacing: 0.12em; text-transform: uppercase; margin-bottom: var(--s2); }
  .honesty .is h3 { color: var(--voice); } .honesty .isnot h3 { color: var(--machine); }
  .honesty ul { margin: 0; padding-left: 1.1rem; }
  .honesty li { margin-bottom: 0.6rem; color: var(--ink-dim); } .honesty li::marker { color: var(--muted); }

  footer { padding-block: var(--s5) var(--s4); }
  .foot-links { display: flex; gap: 1.6rem; flex-wrap: wrap; font-family: var(--font-machine); font-size: 0.85rem; margin-bottom: var(--s3); }
  .foot-links a { color: var(--voice); text-decoration: none; } .foot-links a:hover { text-decoration: underline; }
  footer .disclaim { color: var(--muted); font-size: 0.9rem; max-width: 60ch; }
  .sources { font-family: var(--font-machine); font-size: 0.82rem; color: var(--ink-dim); margin-top: var(--s3); line-height: 1.9; }
  .sources b { color: var(--ink); font-weight: 600; }

/* ---- shared data table (versions, comparison) ---- */
.tbl-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 10px; }
table.tbl { width: 100%; border-collapse: collapse; font-size: 0.92rem; min-width: 34rem; }
table.tbl th, table.tbl td { text-align: left; padding: 0.8rem 1rem; border-bottom: 1px solid var(--line); vertical-align: top; }
table.tbl thead th { font-family: var(--font-machine); font-size: 0.66rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); background: var(--surface-2); }
table.tbl tbody tr:last-child td { border-bottom: none; }
table.tbl .mono { font-family: var(--font-machine); font-variant-numeric: tabular-nums; white-space: nowrap; }
table.tbl tr.current { background: var(--voice-wash); }
table.tbl tr.current .mono, table.tbl tr.current td:first-child { color: var(--voice); }
table.tbl tr.upcoming td { color: var(--muted); }

/* ---- subpage prose ---- */
.prose { max-width: none; }
.prose > p { color: var(--ink-dim); margin: 0 0 1.15rem; }
.prose h2 { font-family: var(--font-voice); font-weight: 600; font-size: clamp(1.4rem, 3.6vw, 2rem); margin: var(--s5) 0 var(--s2); }
.prose h2:first-of-type { margin-top: var(--s3); }
.prose h3 { font-family: var(--font-machine); font-size: 0.82rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--voice); margin: var(--s4) 0 0.6rem; }
.prose strong, .prose b { color: var(--ink); }
.prose ul { color: var(--ink-dim); padding-left: 1.15rem; }
.prose li { margin-bottom: 0.55rem; }
.analogy { border-left: 3px solid var(--voice); background: var(--voice-wash); padding: 1rem 1.3rem; border-radius: 0 8px 8px 0; margin: var(--s3) 0; font-family: var(--font-voice); font-size: 1.05rem; color: var(--ink); }
.analogy b { color: var(--voice-dim); }
.backlink { font-family: var(--font-machine); font-size: 0.82rem; color: var(--muted); }
.backlink a { color: var(--voice); text-decoration: none; }
.readnext { display: flex; gap: 1rem; flex-wrap: wrap; margin-top: var(--s3); }
.readnext a { font-family: var(--font-machine); font-size: 0.9rem; text-decoration: none; border: 1px solid var(--line); border-radius: 8px; padding: 0.7rem 1.1rem; color: var(--ink); }
.readnext a:hover { border-color: var(--voice); color: var(--voice); }