:root {
    color-scheme: dark;
    --bg: #0a0d12;
    --bg-1: #0d1218;
    --bg-2: #11171f;
    --surface: #0f151c;
    --surface-2: #131a23;
    --line: #1c2530;
    --line-2: #283342;
    --line-strong: #334155;
    --ink: #e2e8f0;
    --ink-dim: #94a3b8;
    --ink-faint: #64748b;
    --ink-ghost: #475569;
    --accent: #334155;
    --accent-2: #64748b;
    --accent-cyan: #7fb3c2;
    --warn: #b8a96b;
    --good: #6b9b7a;
    --bad: #b07a7a;
    --grid-line: rgba(51,65,85,0.10);
    --nav-bg: rgba(10,13,18,0.78);
    --menu-bg: rgba(10,13,18,0.97);
    --shadow: rgba(0,0,0,0.8);
    --select-bg: var(--line-strong);
    --select-fg: #fff;
  }

  /* ── LIGHT THEME (eggshell) ────────────────────────────────── */
  :root[data-theme="light"] {
    color-scheme: light;
    --bg: #f1ece0;          /* eggshell */
    --bg-1: #ebe5d6;
    --bg-2: #e4dccb;
    --surface: #f7f3ea;
    --surface-2: #efe9dc;
    --line: #ddd4c0;
    --line-2: #cabfa4;
    --line-strong: #b4a888;
    --ink: #2c2920;         /* warm near-black */
    --ink-dim: #5a5446;
    --ink-faint: #837b68;
    --ink-ghost: #aca288;
    --accent: #b4a888;
    --accent-2: #837b68;
    --accent-cyan: #2f6e7b; /* deep teal */
    --warn: #8a6a1c;        /* deep amber */
    --good: #3f7a52;        /* deep green */
    --bad: #9d4b46;         /* terracotta */
    --grid-line: rgba(120,105,75,0.11);
    --nav-bg: rgba(241,236,224,0.82);
    --menu-bg: rgba(241,236,224,0.97);
    --shadow: rgba(90,75,45,0.20);
    --select-bg: var(--accent-cyan);
    --select-fg: #fff;
  }

  /* "system" mode follows the OS preference */
  @media (prefers-color-scheme: light) {
    :root[data-theme="system"] {
      color-scheme: light;
      --bg: #f1ece0;
      --bg-1: #ebe5d6;
      --bg-2: #e4dccb;
      --surface: #f7f3ea;
      --surface-2: #efe9dc;
      --line: #ddd4c0;
      --line-2: #cabfa4;
      --line-strong: #b4a888;
      --ink: #2c2920;
      --ink-dim: #5a5446;
      --ink-faint: #837b68;
      --ink-ghost: #aca288;
      --accent: #b4a888;
      --accent-2: #837b68;
      --accent-cyan: #2f6e7b;
      --warn: #8a6a1c;
      --good: #3f7a52;
      --bad: #9d4b46;
      --grid-line: rgba(120,105,75,0.11);
      --nav-bg: rgba(241,236,224,0.82);
      --menu-bg: rgba(241,236,224,0.97);
      --shadow: rgba(90,75,45,0.20);
      --select-bg: var(--accent-cyan);
      --select-fg: #fff;
    }
  }
  * { box-sizing: border-box; }
  html, body { margin: 0; padding: 0; background: var(--bg); color: var(--ink); }
  body {
    font-family: 'IBM Plex Sans', system-ui, sans-serif;
    font-weight: 400;
    font-size: 15px;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
  }
  .mono { font-family: 'IBM Plex Mono', ui-monospace, monospace; font-feature-settings: "zero" 1; }
  a { color: inherit; text-decoration: none; }
  ::selection { background: var(--select-bg); color: var(--select-fg); }

  .grid-bg {
    background-image:
      linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
      linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
    background-size: 64px 64px;
  }

  .corners { position: relative; }
  .corners::before, .corners::after {
    content: ""; position: absolute; width: 10px; height: 10px;
    border-color: var(--ink-dim);
  }
  .corners::before { top: -1px; left: -1px; border-top: 1px solid; border-left: 1px solid; }
  .corners::after  { top: -1px; right: -1px; border-top: 1px solid; border-right: 1px solid; }
  .c-bl { position: absolute; bottom: -1px; left: -1px; width: 10px; height: 10px; border-bottom: 1px solid var(--ink-dim); border-left: 1px solid var(--ink-dim); }
  .c-br { position: absolute; bottom: -1px; right: -1px; width: 10px; height: 10px; border-bottom: 1px solid var(--ink-dim); border-right: 1px solid var(--ink-dim); }

  .container { max-width: 1440px; margin: 0 auto; padding: 0 32px; }
  .hairline { height: 1px; background: var(--line); width: 100%; }
  .label {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-faint);
  }
  .tag {
    display: inline-flex; align-items: center; gap: 6px;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px; letter-spacing: 0.10em; text-transform: uppercase;
    color: var(--ink-dim); padding: 4px 8px;
    border: 1px solid var(--line); background: var(--bg-1);
  }
  .dot { width: 6px; height: 6px; background: var(--good); display: inline-block; flex-shrink: 0; }
  .dot.warn   { background: var(--warn); }
  .dot.accent { background: var(--accent-cyan); }
  .blink { animation: blink 1.6s steps(2, end) infinite; }
  @keyframes blink { 0%, 50% { opacity: 1; } 50.01%, 100% { opacity: 0.2; } }

  .reveal { opacity: 0; transform: translateY(14px); transition: opacity .9s ease, transform .9s ease; }
  .reveal.visible { opacity: 1; transform: none; }

  /* ── NAV ──────────────────────────────────────────────────── */
  #site-nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 50;
    background: var(--nav-bg);
    backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line);
  }
  .nav-inner {
    display: flex; align-items: center; height: 64px;
  }
  .nav-brand {
    display: flex; align-items: center; gap: 12px; margin-right: 40px;
  }
  .nav-mark {
    width: 28px; height: 28px; border: 1px solid var(--ink-dim);
    display: grid; place-items: center; flex-shrink: 0;
  }
  .nav-mark span { font-size: 13px; font-weight: 600; }
  .nav-brand-text { display: flex; flex-direction: column; line-height: 1.1; }
  .nav-brand-name { font-size: 14px; font-weight: 500; letter-spacing: 0.01em; }
  .nav-brand-sub  { font-family: 'IBM Plex Mono', monospace; font-size: 9.5px; letter-spacing: 0.18em; color: var(--ink-faint); margin-top: 3px; }
  .nav-links {
    display: flex; align-items: center; gap: 28px; margin-left: auto; margin-right: 40px;
  }
  .nav-link {
    display: inline-flex; align-items: center; gap: 8px; font-size: 13px;
    color: var(--ink-dim); transition: color .2s;
  }
  .nav-link.active { color: var(--ink); }
  .nav-link-idx { font-family: 'IBM Plex Mono', monospace; font-size: 10px; color: var(--ink-ghost); letter-spacing: 0.1em; }
  .nav-cta {
    font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.14em;
    color: var(--ink); padding: 10px 14px;
    border: 1px solid var(--line-strong); background: var(--bg-1);
  }
  .nav-toggle {
    display: none; margin-left: auto; width: 40px; height: 40px;
    align-items: center; justify-content: center;
    background: var(--bg-1); border: 1px solid var(--line-strong);
    color: var(--ink); font-size: 20px; line-height: 1;
    cursor: pointer; padding: 0; font-family: 'IBM Plex Mono', monospace;
  }
  .theme-toggle {
    display: inline-flex; margin-left: 14px; width: 40px; height: 40px;
    align-items: center; justify-content: center; flex-shrink: 0;
    background: var(--bg-1); border: 1px solid var(--line-strong);
    color: var(--ink-dim); cursor: pointer; padding: 0;
    transition: color .2s, border-color .2s, background .2s;
  }
  .theme-toggle:hover { color: var(--ink); border-color: var(--accent-2); }
  .theme-toggle svg { width: 17px; height: 17px; display: none; }
  :root[data-theme="light"]  .theme-toggle .theme-ico-light  { display: block; }
  :root[data-theme="dark"]   .theme-toggle .theme-ico-dark   { display: block; }
  :root[data-theme="system"] .theme-toggle .theme-ico-system { display: block; }
  :root:not([data-theme])    .theme-toggle .theme-ico-system { display: block; }
  .nav-menu {
    display: none; position: absolute; top: 65px; left: 0; right: 0;
    background: var(--menu-bg); backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--line);
    flex-direction: column; padding: 6px 0;
    box-shadow: 0 24px 48px -24px var(--shadow);
  }
  .nav-menu.open { display: flex; }
  .nav-menu-link {
    display: flex; align-items: center; gap: 14px; padding: 15px 20px;
    font-size: 15px; color: var(--ink-dim); border-bottom: 1px solid var(--line);
  }
  .nav-menu-link.active { color: var(--ink); }
  .nav-menu-cta {
    display: flex; align-items: center; gap: 8px; padding: 18px 20px;
    font-family: 'IBM Plex Mono', monospace; font-size: 12px; letter-spacing: 0.16em; color: var(--ink);
  }

  /* ── TELEMETRY ─────────────────────────────────────────────── */
  #telemetry {
    position: fixed; top: 64px; left: 0; right: 0; z-index: 49;
    background: var(--bg); border-bottom: 1px solid var(--line);
  }
  .tel-inner {
    display: flex; align-items: center; height: 28px; gap: 28px;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 10.5px; letter-spacing: 0.08em; text-transform: uppercase;
  }
  .tel-item { display: inline-flex; align-items: center; gap: 10px; }
  .tel-key { color: var(--ink-ghost); }
  .tel-last { margin-left: auto; }

  /* ── HERO ──────────────────────────────────────────────────── */
  #home {
    position: relative; padding-top: 120px; padding-bottom: 96px; overflow: hidden;
  }
  .hero-grid-layer {
    position: absolute; inset: 0; opacity: 0.8;
    mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, #000 50%, transparent 100%);
    -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, #000 50%, transparent 100%);
    pointer-events: none;
  }
  .hero-header { position: relative; }
  .hero-label-row { display: flex; justify-content: space-between; margin-bottom: 28px; }
  .hero-h1 {
    font-size: clamp(40px, 5.4vw, 72px); line-height: 1.08; letter-spacing: -0.02em;
    font-weight: 500; margin: 0; max-width: 1100px;
  }
  .hero-h1 em { font-style: italic; font-weight: 400; color: var(--ink-dim); }
  .hero-lede { margin-top: 28px; max-width: 720px; font-size: 16.5px; line-height: 1.65; color: var(--ink-dim); }

  .hero-split {
    display: grid; grid-template-columns: 1fr auto 1fr; gap: 0;
    align-items: stretch; border: 1px solid var(--line); background: var(--surface);
    margin-top: 56px;
  }
  .split-pane {
    display: flex; flex-direction: column; padding: 36px 36px 40px; gap: 18px; position: relative;
  }
  .split-pane-left  { align-items: flex-end;   text-align: right; }
  .split-pane-right { align-items: flex-start; text-align: left;  }
  .pane-code  { font-family: 'IBM Plex Mono', monospace; font-size: 10.5px; letter-spacing: 0.18em; color: var(--ink-faint); }
  .pane-title { font-size: 40px; font-weight: 500; letter-spacing: -0.01em; margin: 0; }
  .pane-sub   { color: var(--ink-dim); margin: 0; max-width: 360px; }
  .pane-list  { list-style: none; padding: 0; margin: 8px 0 0; display: flex; flex-direction: column; gap: 10px; width: 100%; }
  .pane-list-item { display: flex; gap: 12px; align-items: baseline; font-size: 14px; color: var(--ink); }
  .pane-list-item.rev { flex-direction: row-reverse; }
  .pane-n { font-family: 'IBM Plex Mono', monospace; font-size: 10.5px; color: var(--ink-faint); letter-spacing: 0.12em; }
  .pane-artifact { margin-top: 18px; width: 100%; max-width: 420px; position: relative; }
  .pane-artifact-left  { margin-left: auto; }
  .artifact-stamp {
    position: absolute; bottom: -18px; right: 0;
    font-family: 'IBM Plex Mono', monospace; font-size: 9.5px; letter-spacing: 0.18em; color: var(--ink-ghost);
  }

  /* artifact frames */
  .artifact-frame { border: 1px solid var(--line); background: var(--bg-1); width: 100%; max-width: 420px; }
  .artifact-bar {
    display: flex; justify-content: space-between; padding: 8px 12px;
    border-bottom: 1px solid var(--line);
    font-family: 'IBM Plex Mono', monospace; font-size: 10px; letter-spacing: 0.1em;
    text-transform: uppercase; color: var(--ink-dim);
  }
  .artifact-bar span:last-child { color: var(--ink-ghost); }
  .artifact-code {
    margin: 0; padding: 12px; font-family: 'IBM Plex Mono', monospace;
    font-size: 11px; color: var(--ink-dim); line-height: 1.7; white-space: pre; overflow: hidden;
    background: var(--bg-1);
  }

  .split-divider {
    width: 64px; position: relative; display: flex; flex-direction: column;
    align-items: center; justify-content: center;
  }
  .divider-line {
    position: absolute; top: 0; bottom: 0; left: 50%;
    width: 1px; background: var(--line-2); transform: translateX(-0.5px);
  }
  .divider-slash {
    position: relative; color: var(--ink-dim); font-family: 'IBM Plex Mono', monospace;
    font-size: 28px; background: var(--bg); padding: 12px 0; font-weight: 300; z-index: 1;
  }
  .divider-ticks {
    position: absolute; top: 0; bottom: 0;
    display: flex; flex-direction: column; justify-content: space-between; padding: 8px 0;
  }
  .divider-tick { width: 6px; background: var(--line-2); }

  /* hero metrics */
  .hero-metrics {
    display: grid; grid-template-columns: repeat(4, 1fr);
    border: 1px solid var(--line); background: var(--surface); margin-top: 48px;
  }
  .hero-metric {
    padding: 22px 24px; border-right: 1px solid var(--line);
    display: flex; flex-direction: column; gap: 6px;
  }
  .hero-metric:last-child { border-right: none; }
  .metric-k { font-family: 'IBM Plex Mono', monospace; font-size: 10.5px; letter-spacing: 0.14em; color: var(--ink-faint); }
  .metric-v { font-size: 44px; font-weight: 400; letter-spacing: -0.01em; }
  .metric-note { font-family: 'IBM Plex Mono', monospace; font-size: 11px; color: var(--ink-faint); }

  /* ── SHARED SECTION ────────────────────────────────────────── */
  .section { padding: 120px 0; position: relative; border-top: 1px solid var(--line); }
  .section-alt { background: var(--bg-1); }

  .shead-top { display: flex; justify-content: space-between; align-items: baseline; }
  .shead-idx { font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.18em; color: var(--ink-dim); }
  .shead-id  { font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.18em; color: var(--ink-ghost); }
  .shead-hr  { height: 1px; background: var(--line); margin: 16px 0 28px; }
  .shead-row { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 64px; }
  .shead-kicker { font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent-cyan); margin-bottom: 12px; }
  .shead-h2 { font-size: clamp(32px, 3.4vw, 48px); font-weight: 500; letter-spacing: -0.02em; margin: 0; line-height: 1.08; }
  .shead-blurb { color: var(--ink-dim); font-size: 16px; line-height: 1.6; align-self: end; margin: 0; }

  /* ── WHAT I BUILD ──────────────────────────────────────────── */
  .build-grid {
    display: grid; grid-template-columns: 1fr 1fr; gap: 1px;
    margin-top: 56px; background: var(--line); border: 1px solid var(--line);
  }
  .build-card {
    background: var(--surface); padding: 28px 32px 24px;
    display: flex; flex-direction: column; gap: 14px;
    position: relative; min-height: 280px;
  }
  .card-head { display: flex; align-items: baseline; gap: 12px; }
  .card-code { font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.16em; color: var(--ink); }
  .card-domain { font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.16em; color: var(--ink-faint); }
  .card-status { font-family: 'IBM Plex Mono', monospace; font-size: 10.5px; letter-spacing: 0.16em; color: var(--good); margin-left: auto; }
  .card-title { margin: 0; font-size: 22px; font-weight: 500; letter-spacing: -0.01em; line-height: 1.25; max-width: 540px; }
  .card-body  { margin: 0; color: var(--ink-dim); max-width: 560px; }
  .stack-row  { display: flex; gap: 16px; align-items: center; margin-top: auto; padding-top: 14px; border-top: 1px dashed var(--line); }
  .stack-label { font-family: 'IBM Plex Mono', monospace; font-size: 10px; letter-spacing: 0.18em; color: var(--ink-ghost); }
  .stack-list { display: flex; gap: 14px; flex-wrap: wrap; }
  .stack-item { font-family: 'IBM Plex Mono', monospace; font-size: 11px; color: var(--ink-dim); letter-spacing: 0.06em; }
  .card-foot  { font-family: 'IBM Plex Mono', monospace; font-size: 10.5px; color: var(--ink-faint); letter-spacing: 0.14em; margin-top: 4px; }

  /* ── DISCIPLINES ───────────────────────────────────────────── */
  .svc-matrix {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px;
    border: 1px solid var(--line); background: var(--line); margin-top: 56px;
  }
  .svc-cell {
    background: var(--surface); padding: 28px 28px 26px;
    display: flex; flex-direction: column; gap: 12px; min-height: 280px;
  }
  .cell-head  { display: flex; justify-content: space-between; align-items: baseline; }
  .cell-code  { font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.16em; color: var(--ink-dim); }
  .cell-meta  { font-family: 'IBM Plex Mono', monospace; font-size: 10.5px; letter-spacing: 0.14em; color: var(--ink-ghost); }
  .cell-title { margin: 8px 0 0; font-size: 22px; font-weight: 500; letter-spacing: -0.01em; line-height: 1.2; }
  .cell-desc  { margin: 0; color: var(--ink-dim); line-height: 1.6; }
  .deliv-wrap { margin-top: auto; padding-top: 12px; border-top: 1px dashed var(--line); }
  .deliv-label { font-family: 'IBM Plex Mono', monospace; font-size: 10px; letter-spacing: 0.18em; color: var(--ink-ghost); margin-bottom: 8px; }
  .deliv-list  { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 4px; }
  .deliv-item  { font-size: 13px; color: var(--ink); display: flex; gap: 10px; }
  .deliv-mark  { font-family: 'IBM Plex Mono', monospace; color: var(--accent-cyan); width: 10px; flex-shrink: 0; }

  .proc-wrap { margin-top: 72px; border: 1px solid var(--line); padding: 32px 32px 40px; background: var(--surface); }
  .proc-head { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 28px; }
  .proc-head-right { font-family: 'IBM Plex Mono', monospace; font-size: 11px; color: var(--ink-faint); letter-spacing: 0.14em; }
  .proc-line {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 0;
    position: relative; border-top: 1px solid var(--line-2); padding-top: 24px;
  }
  .proc-step { padding-right: 24px; position: relative; }
  .proc-tick { position: absolute; top: -27px; left: 0; width: 10px; height: 10px; background: var(--accent-cyan); }
  .proc-k { font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.16em; color: var(--ink-dim); margin-bottom: 10px; }
  .proc-t { color: var(--ink); font-size: 14px; line-height: 1.55; max-width: 240px; }

  /* ── VENTURES ──────────────────────────────────────────────── */
  .vp-stack { margin-top: 56px; border: 1px solid var(--line); border-bottom: none; }
  .vp-row {
    display: grid; grid-template-columns: 180px 1.1fr 1.4fr 220px; gap: 32px;
    padding: 32px 28px; border-bottom: 1px solid var(--line);
    align-items: start; background: var(--surface);
  }
  .vp-meta  { display: flex; flex-direction: column; gap: 10px; }
  .vp-code  { font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.16em; color: var(--ink-dim); }
  .vp-state { font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.16em; display: inline-flex; align-items: center; gap: 8px; }
  .vp-state.active { color: var(--good); }
  .vp-state.incubating { color: var(--warn); }
  .vp-name-wrap { display: flex; flex-direction: column; gap: 8px; }
  .vp-name { margin: 0; font-size: 30px; font-weight: 500; letter-spacing: 0.01em; }
  .vp-cat  { font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.14em; color: var(--ink-faint); }
  .vp-desc { margin: 0; color: var(--ink-dim); max-width: 520px; line-height: 1.6; }
  .vp-metric { border-left: 1px solid var(--line); padding-left: 24px; }
  .vp-metric-k { font-family: 'IBM Plex Mono', monospace; font-size: 10.5px; letter-spacing: 0.16em; color: var(--ink-faint); margin-bottom: 6px; }
  .vp-metric-v { font-size: 32px; font-weight: 400; letter-spacing: -0.01em; }

  /* ── LABS ──────────────────────────────────────────────────── */
  .lab-console { margin-top: 56px; background: var(--surface); border: 1px solid var(--line); }
  .lab-head {
    display: flex; align-items: center; gap: 16px; padding: 12px 18px;
    border-bottom: 1px solid var(--line);
    font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.14em; color: var(--ink-dim);
  }
  .lab-dot-row { display: inline-flex; align-items: center; gap: 6px; }
  .lab-time { margin-left: auto; color: var(--ink-faint); }
  .lab-thead {
    display: grid; grid-template-columns: 80px 140px 1.2fr 1.1fr; gap: 24px;
    padding: 12px 24px; border-bottom: 1px solid var(--line);
    font-family: 'IBM Plex Mono', monospace; font-size: 10px; letter-spacing: 0.18em; color: var(--ink-ghost);
  }
  .lab-row {
    display: grid; grid-template-columns: 80px 140px 1.2fr 1.1fr; gap: 24px;
    padding: 20px 24px; border-bottom: 1px solid var(--line); align-items: baseline;
  }
  .lab-id    { font-family: 'IBM Plex Mono', monospace; font-size: 12px; letter-spacing: 0.12em; color: var(--ink-dim); }
  .lab-state { font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.14em; display: inline-flex; align-items: center; gap: 8px; }
  .lab-state.running { color: var(--good); }
  .lab-state.paused  { color: var(--warn); }
  .lab-state.shipped { color: var(--accent-cyan); }
  .lab-q    { font-size: 16px; color: var(--ink); line-height: 1.4; }
  .lab-note { font-size: 13px; color: var(--ink-dim); line-height: 1.55; }

  /* ── CONTACT ───────────────────────────────────────────────── */
  .contact-grid { margin-top: 56px; display: grid; grid-template-columns: 1.4fr 1fr; gap: 32px; }
  .contact-form {
    background: var(--surface); border: 1px solid var(--line);
    padding: 28px 32px 32px; position: relative;
    display: flex; flex-direction: column; gap: 22px;
  }
  .form-head { display: flex; justify-content: space-between; border-bottom: 1px solid var(--line); padding-bottom: 14px; margin-bottom: 6px; }
  .form-head-k { font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.18em; color: var(--ink-dim); }
  .form-head-v { font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.18em; color: var(--ink); display: inline-flex; align-items: center; gap: 8px; }
  .form-field { display: flex; flex-direction: column; gap: 8px; }
  .form-lbl { font-family: 'IBM Plex Mono', monospace; font-size: 10.5px; letter-spacing: 0.18em; color: var(--ink-faint); }
  .form-input, .form-textarea {
    background: var(--bg-1); border: 1px solid var(--line); color: var(--ink);
    padding: 12px 14px; font-family: inherit; font-size: 15px; outline: none;
    transition: border-color .15s;
  }
  .form-input::placeholder, .form-textarea::placeholder { color: var(--ink-ghost); }
  .form-input:focus, .form-textarea:focus { border-color: var(--line-strong); }
  .form-textarea { resize: vertical; }
  .scope-row { display: flex; gap: 10px; flex-wrap: wrap; }
  .scope-btn {
    background: transparent; border: 1px solid var(--line); color: var(--ink-dim);
    padding: 10px 14px; font-family: 'IBM Plex Mono', monospace; font-size: 11px;
    letter-spacing: 0.14em; cursor: pointer; transition: all .15s;
  }
  .scope-btn.active { border-color: var(--ink); color: var(--ink); }
  .submit-row { display: flex; justify-content: space-between; align-items: center; margin-top: 12px; padding-top: 18px; border-top: 1px dashed var(--line); }
  .submit-dis { font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.14em; color: var(--ink-faint); }
  .submit-btn {
    background: var(--ink); color: var(--bg); border: none; padding: 12px 18px;
    font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.18em;
    cursor: pointer; transition: opacity .2s;
  }
  .submit-btn:disabled { opacity: 0.6; cursor: not-allowed; }
  .form-status { font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.12em; padding: 10px 0; }
  .form-status.ok  { color: var(--good); }
  .form-status.err { color: var(--warn); }
  /* Honeypot — off-screen, never shown to or focusable by real users. */
  .hp-field { position: absolute; left: -9999px; top: -9999px; width: 1px; height: 1px; overflow: hidden; }

  .contact-aside {
    display: flex; flex-direction: column; gap: 0;
    border: 1px solid var(--line); background: var(--surface);
  }
  .aside-block { padding: 22px 24px; border-bottom: 1px solid var(--line); display: flex; flex-direction: column; gap: 8px; }
  .aside-k { font-family: 'IBM Plex Mono', monospace; font-size: 10.5px; letter-spacing: 0.18em; color: var(--ink-faint); }
  .aside-v { font-size: 18px; font-weight: 500; color: var(--ink); line-height: 1.35; }
  .aside-mail { color: inherit; text-decoration: none; border-bottom: 1px solid var(--line); }
  .aside-mail:hover { border-bottom-color: var(--line-strong); }
  .aside-note { font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.06em; color: var(--ink-faint); }
  .dont-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 6px; color: var(--ink-dim); font-size: 13px; }

  /* ── FOOTER ────────────────────────────────────────────────── */
  footer { padding: 80px 0 32px; border-top: 1px solid var(--line); background: var(--bg); }
  .foot-row { display: grid; grid-template-columns: 1.2fr 2fr; gap: 64px; }
  .foot-brand { display: flex; align-items: center; gap: 14px; }
  .foot-brand-name { font-size: 22px; font-weight: 500; }
  .foot-tag { margin-top: 18px; color: var(--ink-dim); max-width: 360px; }
  .foot-cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
  .foot-col-t { font-family: 'IBM Plex Mono', monospace; font-size: 10.5px; letter-spacing: 0.18em; color: var(--ink-faint); margin-bottom: 14px; }
  .foot-col-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; }
  .foot-col-link { font-size: 14px; color: var(--ink); }
  .foot-bottom { display: flex; justify-content: space-between; margin-top: 16px; }
  .foot-legal { font-family: 'IBM Plex Mono', monospace; font-size: 11px; color: var(--ink-faint); letter-spacing: 0.14em; }

  /* ── RESPONSIVE ────────────────────────────────────────────── */
  @media (max-width: 980px) {
    .nav-links, .nav-cta { display: none !important; }
    .nav-toggle { display: inline-flex !important; margin-left: 8px !important; }
    .theme-toggle { margin-left: auto !important; }
    #telemetry { display: none !important; }
    main { padding-top: 64px !important; }
  }
  @media (max-width: 1024px) {
    .container { padding: 0 24px; }
    .svc-matrix { grid-template-columns: 1fr 1fr !important; }
    .shead-row  { grid-template-columns: 1fr !important; gap: 24px !important; }
    .foot-row   { grid-template-columns: 1fr !important; gap: 40px !important; }
    .vp-row     { grid-template-columns: 160px 1fr !important; gap: 20px 28px !important; }
    .vp-metric  { border-left: none !important; padding-left: 0 !important; border-top: 1px solid var(--line); padding-top: 16px !important; grid-column: 1 / -1; }
    .vp-desc    { grid-column: 1 / -1; }
  }
  @media (max-width: 880px) {
    .container { padding: 0 20px; }
    .hero-split { grid-template-columns: 1fr !important; }
    .split-divider { display: none !important; }
    .split-pane-right { border-top: 1px solid var(--line) !important; }
    .split-pane { align-items: flex-start !important; text-align: left !important; padding: 28px 24px 32px !important; }
    .pane-list  { align-items: flex-start !important; }
    .pane-list-item { flex-direction: row !important; }
    .pane-artifact { display: none !important; }       /* drop decorative trace/CAD panels — they overflow narrow screens */
    .pane-title { font-size: 32px !important; }
    .build-grid     { grid-template-columns: 1fr !important; }
    .hero-metrics   { grid-template-columns: 1fr 1fr !important; }
    .hero-metric    { border-bottom: 1px solid var(--line); }
    .contact-grid   { grid-template-columns: 1fr !important; }
    .proc-line      { grid-template-columns: 1fr 1fr !important; gap: 28px 24px !important; }
  }
  @media (max-width: 640px) {
    .container { padding: 0 16px; }
    #home   { padding-top: 36px !important; padding-bottom: 64px !important; }
    .section { padding: 72px 0 !important; }
    .svc-matrix     { grid-template-columns: 1fr !important; }
    .hero-metrics   { grid-template-columns: 1fr !important; }
    .hero-metric    { border-right: none !important; }
    .metric-v       { font-size: 34px !important; }
    .proc-line      { grid-template-columns: 1fr !important; gap: 26px 0 !important; }
    .vp-row         { grid-template-columns: 1fr !important; gap: 16px !important; }
    .vp-name        { font-size: 26px !important; }
    .foot-cols      { grid-template-columns: 1fr 1fr !important; gap: 28px 24px !important; }
    .foot-bottom    { flex-direction: column !important; gap: 10px !important; align-items: flex-start !important; }
    .lab-thead      { display: none !important; }
    .lab-row        { grid-template-columns: 1fr !important; gap: 8px !important; padding: 18px !important; }
    .lab-q          { font-size: 15px !important; }
    /* drop the long masthead meta line on phones */
    .hero-label-row > .label:last-child { display: none !important; }
    .hero-lede      { font-size: 15px !important; }
    /* tighten cards and stop monospace headers wrapping mid-token */
    .build-card, .svc-cell { min-height: auto !important; padding: 24px 20px !important; }
    .card-head      { flex-wrap: wrap !important; gap: 4px 10px !important; }
    .card-status    { margin-left: 0 !important; }
    .card-code, .card-domain, .card-status, .cell-code, .vp-code, .lab-id { white-space: nowrap; }
    .card-title     { font-size: 20px !important; }
    .stack-row      { flex-wrap: wrap !important; align-items: flex-start !important; gap: 8px 14px !important; }
    .split-pane     { gap: 14px !important; padding: 24px 20px !important; }
    .pane-title     { font-size: 30px !important; }
  }

  /* ── SYSTEM / DOC PAGES ─────────────────────────────────────────────── */
  .doc { padding: 120px 0 96px; position: relative; }
  .doc-wrap { max-width: 760px; }
  .doc-back { display: inline-flex; align-items: center; gap: 8px; font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.14em; color: var(--ink-faint); margin-bottom: 28px; transition: color 0.15s; }
  .doc-back:hover { color: var(--ink-dim); }
  .doc h1 { font-size: clamp(30px, 3.2vw, 44px); font-weight: 500; letter-spacing: -0.02em; line-height: 1.1; margin: 0 0 14px; }
  .doc-lead { color: var(--ink-dim); font-size: 16px; line-height: 1.6; margin: 0 0 8px; }
  .doc h2 { font-size: 13px; font-family: 'IBM Plex Mono', monospace; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent-cyan); margin: 44px 0 14px; font-weight: 500; }
  .doc p { color: var(--ink-dim); line-height: 1.65; margin: 0 0 14px; }
  .doc ul { color: var(--ink-dim); line-height: 1.65; margin: 0 0 14px; padding-left: 20px; }
  .doc ul li { margin-bottom: 6px; }
  .doc strong { color: var(--ink); font-weight: 500; }
  .doc .doc-kv { display: grid; grid-template-columns: 160px 1fr; gap: 8px 24px; margin: 0 0 14px; }
  .doc .doc-kv dt { font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-faint); padding-top: 3px; }
  .doc .doc-kv dd { margin: 0; color: var(--ink-dim); }
  .doc-mail { color: var(--ink); border-bottom: 1px solid var(--line-strong); }
  .doc-mail:hover { border-bottom-color: var(--accent-cyan); }
  .doc-note { font-family: 'IBM Plex Mono', monospace; font-size: 12px; color: var(--ink-faint); line-height: 1.6; border-left: 1px solid var(--line-2); padding-left: 16px; margin: 20px 0; }
  @media (max-width: 640px) {
    .doc { padding: 96px 0 72px; }
    .doc .doc-kv { grid-template-columns: 1fr; gap: 2px 0; }
    .doc .doc-kv dd { margin-bottom: 10px; }
  }

  /* ── FIELD NOTES ────────────────────────────────────────────────────── */
  /* A public engineering notebook. Industrial, documentation-first, mono-friendly. */
  .fn { padding: 120px 0 96px; position: relative; }
  .fn-grid-layer {
    position: absolute; inset: 0; opacity: 0.6; pointer-events: none;
    mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 40%, transparent 100%);
    -webkit-mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 40%, transparent 100%);
  }
  .fn-wrap { position: relative; max-width: 1040px; }
  .fn-back { display: inline-flex; align-items: center; gap: 8px; font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.14em; color: var(--ink-faint); margin-bottom: 28px; transition: color 0.15s; }
  .fn-back:hover { color: var(--ink-dim); }

  /* Masthead */
  .fn-masthead { border-bottom: 1px solid var(--line); padding-bottom: 28px; margin-bottom: 8px; }
  .fn-kicker { font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent-cyan); margin-bottom: 14px; }
  .fn-h1 { font-size: clamp(32px, 4vw, 56px); font-weight: 500; letter-spacing: -0.02em; line-height: 1.06; margin: 0 0 18px; }
  .fn-lead { color: var(--ink-dim); font-size: 16.5px; line-height: 1.65; margin: 0; max-width: 680px; }
  .fn-mast-meta { display: flex; flex-wrap: wrap; gap: 28px; margin-top: 24px; font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-faint); }
  .fn-mast-meta b { color: var(--ink-dim); font-weight: 500; }

  /* Index list of note cards */
  .fn-list { list-style: none; padding: 0; margin: 40px 0 0; border: 1px solid var(--line); background: var(--surface); }
  .fn-card {
    display: grid; grid-template-columns: 96px 1fr; gap: 28px;
    padding: 30px 32px; border-bottom: 1px solid var(--line);
    position: relative; transition: background 0.15s;
  }
  .fn-card:last-child { border-bottom: none; }
  .fn-card:hover { background: var(--surface-2); }
  .fn-card-stretch { position: absolute; inset: 0; } /* full-card click target */
  .fn-card-num { font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.14em; color: var(--ink-ghost); padding-top: 4px; }
  .fn-card-body { display: flex; flex-direction: column; gap: 12px; }
  .fn-card-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; }
  .fn-card-cat { font-family: 'IBM Plex Mono', monospace; font-size: 10.5px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-faint); }
  .fn-card-date { font-family: 'IBM Plex Mono', monospace; font-size: 10.5px; letter-spacing: 0.1em; color: var(--ink-ghost); margin-left: auto; }
  .fn-card-title { margin: 0; font-size: 24px; font-weight: 500; letter-spacing: -0.01em; line-height: 1.2; color: var(--ink); position: relative; z-index: 1; }
  .fn-card-title a { color: inherit; }
  .fn-card-sum { margin: 0; color: var(--ink-dim); line-height: 1.6; max-width: 640px; }
  .fn-card-featured { position: absolute; top: 0; left: 0; width: 2px; bottom: 0; background: var(--accent-cyan); }

  /* Status badge — shared by list + detail */
  .fn-status {
    display: inline-flex; align-items: center; gap: 7px;
    font-family: 'IBM Plex Mono', monospace; font-size: 10.5px; letter-spacing: 0.14em; text-transform: uppercase;
    padding: 4px 9px; border: 1px solid var(--line); background: var(--bg-1); color: var(--ink-dim);
  }
  .fn-status::before { content: ""; width: 6px; height: 6px; background: var(--ink-faint); flex-shrink: 0; }
  .fn-status.is-active::before    { background: var(--good); }
  .fn-status.is-active            { color: var(--good); }
  .fn-status.is-progress::before  { background: var(--accent-cyan); }
  .fn-status.is-progress          { color: var(--accent-cyan); }
  .fn-status.is-prototype::before { background: var(--warn); }
  .fn-status.is-prototype         { color: var(--warn); }
  .fn-status.is-validated::before { background: var(--good); }
  .fn-status.is-validated         { color: var(--good); }
  .fn-status.is-archived::before  { background: var(--ink-ghost); }
  .fn-status.is-archived          { color: var(--ink-faint); }
  .fn-status.is-failed::before    { background: var(--bad); }
  .fn-status.is-failed            { color: var(--bad); }

  /* Detail page — wider on desktop to use horizontal space; self-limits on small screens */
  .fn-detail { max-width: 1180px; }
  .fn-detail-head { border-bottom: 1px solid var(--line); padding-bottom: 30px; margin-bottom: 8px; }
  .fn-detail-id { font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.16em; color: var(--ink-ghost); margin-bottom: 16px; }
  .fn-detail-title { font-size: clamp(30px, 3.6vw, 48px); font-weight: 500; letter-spacing: -0.02em; line-height: 1.08; margin: 0 0 18px; }
  .fn-detail-sum { color: var(--ink-dim); font-size: 16.5px; line-height: 1.6; margin: 0 0 24px; max-width: 720px; }
  /* Frontmatter strip */
  .fn-fm { display: grid; grid-template-columns: 110px 1fr; gap: 10px 24px; margin: 0; }
  .fn-fm dt { font-family: 'IBM Plex Mono', monospace; font-size: 10.5px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-faint); padding-top: 4px; }
  .fn-fm dd { margin: 0; color: var(--ink-dim); display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
  .fn-tags { display: flex; flex-wrap: wrap; gap: 8px; }
  .fn-tag { font-family: 'IBM Plex Mono', monospace; font-size: 10.5px; letter-spacing: 0.08em; color: var(--ink-dim); padding: 3px 8px; border: 1px solid var(--line); background: var(--bg-1); }

  /* Detail sections — Problem / Background / Observations / ... */
  .fn-section { padding: 34px 0; border-bottom: 1px solid var(--line); }
  .fn-section:last-of-type { border-bottom: none; }
  .fn-section h2 {
    font-family: 'IBM Plex Mono', monospace; font-size: 13px; letter-spacing: 0.12em; text-transform: uppercase;
    color: var(--accent-cyan); font-weight: 500; margin: 0 0 16px; display: flex; align-items: baseline; gap: 12px;
  }
  .fn-section h2 .fn-section-n { color: var(--ink-ghost); font-size: 11px; }
  .fn-section p { color: var(--ink-dim); line-height: 1.7; margin: 0 0 14px; }
  .fn-section p:last-child { margin-bottom: 0; }
  .fn-section ul, .fn-section ol { color: var(--ink-dim); line-height: 1.7; margin: 0 0 14px; padding-left: 20px; }
  .fn-section li { margin-bottom: 6px; }
  .fn-section strong { color: var(--ink); font-weight: 500; }
  .fn-section code { font-family: 'IBM Plex Mono', monospace; font-size: 13px; background: var(--bg-1); border: 1px solid var(--line); padding: 1px 5px; color: var(--ink); }
  .fn-section pre { font-family: 'IBM Plex Mono', monospace; font-size: 12.5px; line-height: 1.7; background: var(--bg-1); border: 1px solid var(--line); padding: 16px; overflow-x: auto; color: var(--ink-dim); margin: 0 0 14px; }
  .fn-placeholder { font-style: italic; color: var(--ink-faint); }

  /* Detail tables — full width so values spread out instead of bunching left */
  .fn-section table { width: 100%; border-collapse: collapse; margin: 4px 0 14px; }
  .fn-section th, .fn-section td { text-align: left; vertical-align: top; padding: 11px 20px 11px 0; line-height: 1.6; }
  .fn-section th:last-child, .fn-section td:last-child { padding-right: 0; }
  .fn-section tr { border-bottom: 1px solid var(--line); }
  .fn-section tr:last-child { border-bottom: none; }
  .fn-section td { color: var(--ink-dim); }
  .fn-section th { color: var(--ink); font-weight: 500; }
  /* Key/value rows (th + td): fix the label column so the value fills the rest */
  .fn-section tr:has(th + td) th { width: 240px; font-weight: 500; }
  /* Grid header row (th + th): mono column labels, like the rest of the doc chrome */
  .fn-section tr:has(th + th) th {
    font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.1em;
    text-transform: uppercase; color: var(--ink-faint); padding-bottom: 12px;
  }

  /* Image gallery */
  .fn-gallery { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin: 4px 0 0; }
  .fn-figure { margin: 0; border: 1px solid var(--line); background: var(--surface); }
  .fn-figure img { display: block; width: 100%; height: auto; }
  .fn-figure-ph {
    aspect-ratio: 4 / 3; display: grid; place-items: center; background: var(--bg-1);
    background-image: linear-gradient(135deg, var(--line) 1px, transparent 1px), linear-gradient(225deg, var(--line) 1px, transparent 1px);
    background-size: 18px 18px;
    font-family: 'IBM Plex Mono', monospace; font-size: 10.5px; letter-spacing: 0.14em; color: var(--ink-ghost); text-transform: uppercase;
  }
  .fn-figcaption { padding: 10px 14px; border-top: 1px solid var(--line); font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.04em; color: var(--ink-faint); }

  /* Detail footer nav */
  .fn-detail-foot { display: flex; justify-content: space-between; align-items: center; gap: 20px; margin-top: 40px; padding-top: 28px; border-top: 1px solid var(--line); }
  .fn-foot-link { font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.14em; color: var(--ink-dim); transition: color 0.15s; }
  .fn-foot-link:hover { color: var(--ink); }

  @media (max-width: 640px) {
    .fn { padding: 96px 0 72px; }
    .fn-card { grid-template-columns: 1fr; gap: 14px; padding: 24px 20px; }
    .fn-card-date { margin-left: 0; }
    .fn-gallery { grid-template-columns: 1fr; }
    .fn-fm { grid-template-columns: 1fr; gap: 2px 0; }
    .fn-fm dd { margin-bottom: 12px; }
    .fn-section tr:has(th + td) th { width: 130px; }
    .fn-section th, .fn-section td { padding: 9px 14px 9px 0; font-size: 14px; }
  }