:root {
    --bg: #f0f5f5;
    --surface: #ffffff;
    --ink: #0c2b3a;
    --muted: #465f6c;
    --line: #cddcdf;
    --teal: #0b7a86;
    --on-teal: #ffffff;
    --sun: #f2a413;
    --sun-soft: #fff0cf;
    --sea-soft: #dcecee;
    --focus: #0b7a86;
    --display: "Barlow Condensed", "Arial Narrow", "Helvetica Neue", Arial, sans-serif;
    --body: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  }
  @media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
      --bg: #08202b;
      --surface: #0f2e3c;
      --ink: #e7f1f3;
      --muted: #9db6bf;
      --line: #21485a;
      --teal: #4cc3ce;
      --on-teal: #062028;
      --sun: #ffbe3d;
      --sun-soft: #3a2e10;
      --sea-soft: #123646;
      --focus: #4cc3ce;
    }
  }
  :root[data-theme="dark"] {
    --bg: #08202b;
    --surface: #0f2e3c;
    --ink: #e7f1f3;
    --muted: #9db6bf;
    --line: #21485a;
    --teal: #4cc3ce;
    --on-teal: #062028;
    --sun: #ffbe3d;
    --sun-soft: #3a2e10;
    --sea-soft: #123646;
    --focus: #4cc3ce;
  }

  * { box-sizing: border-box; }
  html { scroll-behavior: auto; }
  body {
    background: var(--bg);
    color: var(--ink);
    font-family: var(--body);
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
  }
  a { color: var(--teal); text-underline-offset: 3px; }
  a:hover { text-decoration-thickness: 2px; }
  :focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; border-radius: 4px; }
  h1, h2, h3 { font-family: var(--display); line-height: 1.02; margin: 0; text-wrap: balance; letter-spacing: 0.005em; }
  h1 { font-size: clamp(2.6rem, 7.4vw, 4.9rem); font-weight: 700; text-transform: uppercase; letter-spacing: 0.01em; }
  h2 { font-size: clamp(1.9rem, 4.2vw, 2.7rem); font-weight: 700; }
  h3 { font-size: 1.45rem; font-weight: 600; line-height: 1.15; }
  p { margin: 0; }
  .wrap { max-width: 1120px; margin-inline: auto; padding-inline: 20px; }
  .eyebrow { font-family: var(--mono); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--muted); }
  .lead { font-size: 1.15rem; color: var(--muted); max-width: 56ch; }
  .measure { max-width: 64ch; }
  .stack > * + * { margin-top: 1rem; }

  /* header */
  .site-head { background: var(--surface); border-bottom: 1px solid var(--line); z-index: 20; }
  .head-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-block: 12px; flex-wrap: wrap; }
  .brand { text-decoration: none; color: var(--ink); display: flex; flex-direction: column; line-height: 1; }
  .brand b { font-family: var(--display); font-size: 1.55rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.04em; }
  .brand b i { font-style: normal; color: var(--teal); }
  .brand small { font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); margin-top: 4px; }
  .nav { display: flex; gap: 4px; overflow-x: auto; width: 100%; order: 3; padding-bottom: 2px; -webkit-overflow-scrolling: touch; }
  .nav a { white-space: nowrap; text-decoration: none; color: var(--ink); font-weight: 500; font-size: 0.95rem; padding: 8px 12px; border-radius: 6px; border-bottom: 2px solid transparent; }
  .nav a:hover { background: var(--sea-soft); }
  .nav a[aria-current="page"] { border-bottom-color: var(--sun); font-weight: 600; }
  @media (min-width: 900px) {
    .site-head { position: sticky; top: env(safe-area-inset-top, 0px); }
    .nav { width: auto; order: 0; overflow: visible; }
  }

  /* buttons */
  .btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; font: 600 1rem var(--body); text-decoration: none; padding: 12px 20px; border-radius: 6px; border: 2px solid var(--teal); background: var(--teal); color: var(--on-teal); cursor: pointer; min-height: 46px; }
  .btn:hover { filter: brightness(1.08); text-decoration: none; }
  .btn.ghost { background: transparent; color: var(--teal); }
  .btn.ghost:hover { background: var(--sea-soft); filter: none; }
  .btn-row { display: flex; flex-wrap: wrap; gap: 12px; }

  /* hero */
  .hero { padding-block: 44px 40px; }
  .hero-grid { display: grid; gap: 36px; align-items: center; }
  @media (min-width: 900px) { .hero-grid { grid-template-columns: 1.02fr 1fr; gap: 56px; } }
  .hero h1 em { font-style: normal; color: var(--teal); }
  .hero .lead { margin-top: 20px; }
  .hero .btn-row { margin-top: 28px; }
  .figure { margin: 0; }
  .figure svg { display: block; width: 100%; height: auto; max-width: 100%; }
  .legend { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-top: 10px; font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.04em; color: var(--muted); }
  .legend span { display: inline-flex; align-items: center; gap: 8px; }
  .legend i { display: inline-block; width: 22px; height: 0; border-top: 3px solid var(--sun); }
  .legend i.r { border-top-style: dashed; border-color: var(--teal); }
  .legend i.f { border-top: 8px solid var(--teal); }

  /* svg tokens */
  .s-sun { fill: var(--sun); }
  .s-ray { stroke: var(--sun); stroke-width: 4; stroke-linecap: round; fill: none; }
  .s-ref { stroke: var(--teal); stroke-width: 4; stroke-linecap: round; stroke-dasharray: 9 8; fill: none; }
  .s-head-sun { fill: var(--sun); }
  .s-head-ref { fill: var(--teal); }
  .s-body { fill: var(--surface); stroke: var(--ink); stroke-width: 3; }
  .s-film { fill: var(--teal); }
  .s-glass { fill: var(--sea-soft); stroke: var(--ink); stroke-width: 3; }
  .s-wheel { fill: var(--ink); }
  .s-hub { fill: var(--surface); }
  .s-ground { stroke: var(--line); stroke-width: 3; stroke-linecap: round; }
  .s-cool { fill: var(--sea-soft); }

  /* spec strip */
  .specs { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 24px 16px; margin: 0; padding-block: 8px; }
  .specs > div { border-left: 4px solid var(--line); padding: 2px 0 2px 16px; }
  .specs > div.hot { border-left-color: var(--sun); }
  .specs dt { font-family: var(--display); font-weight: 700; font-size: clamp(2rem, 4vw, 2.7rem); line-height: 1; color: var(--ink); font-variant-numeric: tabular-nums; }
  .specs dt sup { font-size: 0.5em; color: var(--teal); }
  .specs dd { margin: 8px 0 0; font-size: 0.9rem; color: var(--muted); line-height: 1.4; }
  @media (max-width: 480px) {
    .brand b { font-size: 1.3rem; }
    .head-row .btn { padding: 8px 14px; min-height: 40px; font-size: 0.95rem; }
  }
  .fine { font-size: 0.82rem; color: var(--muted); }

  /* sections */
  .band { padding-block: 56px; }
  .band.alt { background: var(--surface); border-block: 1px solid var(--line); }
  .sec-head { display: grid; gap: 12px; margin-bottom: 28px; }
  .paths { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
  .path { display: flex; flex-direction: column; gap: 12px; padding: 28px; background: var(--surface); border: 1px solid var(--line); border-radius: 10px; text-decoration: none; color: var(--ink); }
  .path:hover { border-color: var(--teal); }
  .path p { color: var(--muted); }
  .path .go { margin-top: auto; padding-top: 8px; font-weight: 600; color: var(--teal); }
  .two { display: grid; gap: 32px; }
  @media (min-width: 820px) { .two { grid-template-columns: 1fr 1fr; gap: 56px; } .two.wide-l { grid-template-columns: 1.15fr 1fr; } }
  .quote { border-left: 4px solid var(--sun); padding: 4px 0 4px 20px; font-size: 1.2rem; line-height: 1.45; max-width: 52ch; }
  .quote cite { display: block; margin-top: 10px; font-style: normal; font-family: var(--mono); font-size: 0.78rem; color: var(--muted); letter-spacing: 0.04em; }

  /* rows: vehicle types, audiences */
  .rows { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
  .rows li { display: grid; gap: 4px 28px; padding: 20px 0; border-bottom: 1px solid var(--line); }
  @media (min-width: 720px) { .rows li { grid-template-columns: 15rem 1fr; } }
  .rows h3 { margin: 0; }
  .rows p { color: var(--muted); max-width: 60ch; }
  .tick { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
  .tick li { position: relative; padding-left: 30px; }
  .tick li::before { content: ""; position: absolute; left: 0; top: 0.5em; width: 16px; height: 8px; border-left: 3px solid var(--teal); border-bottom: 3px solid var(--teal); transform: rotate(-45deg) translateY(-3px); }

  /* steps */
  .steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 0; counter-reset: step; border-top: 1px solid var(--line); }
  .steps li { counter-increment: step; display: grid; grid-template-columns: 3.2rem 1fr; gap: 4px 12px; padding: 22px 0; border-bottom: 1px solid var(--line); }
  .steps li::before { content: counter(step); font-family: var(--display); font-weight: 700; font-size: 2.6rem; line-height: 0.9; color: var(--teal); grid-row: span 2; }
  .steps h3 { margin: 0; }
  .steps p { color: var(--muted); max-width: 58ch; }

  .note { background: var(--sun-soft); border: 1px solid var(--sun); border-radius: 8px; padding: 16px 18px; max-width: 64ch; }
  .note strong { font-weight: 600; }

  /* faq */
  details { border-bottom: 1px solid var(--line); }
  details:first-of-type { border-top: 1px solid var(--line); }
  summary { cursor: pointer; padding: 18px 40px 18px 0; font-weight: 600; font-size: 1.05rem; list-style: none; position: relative; }
  summary::-webkit-details-marker { display: none; }
  summary::after { content: "+"; position: absolute; right: 6px; top: 50%; transform: translateY(-50%); font-family: var(--mono); font-size: 1.4rem; color: var(--teal); }
  details[open] summary::after { content: "\2212"; }
  details p { padding: 0 0 20px; color: var(--muted); max-width: 64ch; }

  /* quote form */
  .form { display: grid; gap: 16px; }
  .field { display: grid; gap: 6px; }
  .field-row { display: grid; gap: 16px; }
  @media (min-width: 620px) { .field-row { grid-template-columns: 1fr 1fr; } }
  label { font-weight: 600; font-size: 0.92rem; }
  label small { font-weight: 400; color: var(--muted); }
  input, select, textarea { font: inherit; color: var(--ink); background: var(--surface); border: 1px solid var(--line); border-radius: 6px; padding: 11px 12px; width: 100%; min-height: 46px; }
  textarea { min-height: 96px; resize: vertical; }
  input:focus-visible, select:focus-visible, textarea:focus-visible { outline: 3px solid var(--focus); outline-offset: 1px; border-color: var(--teal); }
  .preview { font-family: var(--mono); font-size: 0.82rem; line-height: 1.55; min-height: 190px; }
  .contact-box { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 24px; display: grid; gap: 14px; align-content: start; }
  .contact-box dl { margin: 0; display: grid; gap: 12px; }
  .contact-box dt { font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--muted); }
  .contact-box dd { margin: 2px 0 0; font-size: 1.05rem; font-weight: 500; overflow-wrap: anywhere; }
  .status { min-height: 1.4em; font-size: 0.9rem; color: var(--teal); font-weight: 600; }

  /* cta band */
  .cta { background: var(--teal); color: var(--on-teal); padding-block: 52px; }
  .cta h2 { max-width: 20ch; }
  .cta p { margin-top: 12px; max-width: 54ch; opacity: 0.95; }
  .cta .btn { background: var(--on-teal); color: var(--teal); border-color: var(--on-teal); margin-top: 24px; }

  /* footer */
  .foot { padding-block: 40px 56px; border-top: 1px solid var(--line); }
  .foot-grid { display: grid; gap: 28px; }
  @media (min-width: 820px) { .foot-grid { grid-template-columns: 1.2fr 1fr 1fr; } }
  .foot h3 { font-size: 1.1rem; margin-bottom: 8px; }
  .foot ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
  .foot p, .foot li { font-size: 0.92rem; color: var(--muted); }
  .legal { margin-top: 28px; padding-top: 20px; border-top: 1px solid var(--line); font-size: 0.8rem; color: var(--muted); max-width: 90ch; }
  @media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }

  body { margin: 0; }
  .wave { display: block; width: 100%; height: 28px; margin-top: 8px; }
  .wave path { fill: none; stroke: var(--teal); stroke-width: 3; stroke-linecap: round; }
  .svc-grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
  .svc { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 24px; }
  .svc p { color: var(--muted); margin-top: 8px; }
  .feature { background: var(--teal); color: var(--on-teal); }
  .feature .wrap { display: grid; gap: 20px; padding-block: 52px; }
  @media (min-width: 820px) { .feature .wrap { grid-template-columns: 1.3fr 1fr; align-items: center; gap: 56px; } }
  .feature .eyebrow { color: var(--on-teal); opacity: 0.85; }
  .feature p { max-width: 54ch; opacity: 0.95; }
  .feature .btn { background: var(--on-teal); color: var(--teal); border-color: var(--on-teal); justify-self: start; }
  .nf { padding-block: 96px; }
  :root { --err: #b3261e; }
  @media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) { --err: #ff8a80; } }
  :root[data-theme="dark"] { --err: #ff8a80; }
  .status.err { color: var(--err); }