/* ============ Design tokens ============ */
  :root{
    --navy-900:#101d2e;
    --navy-800:#16283f;
    --navy-700:#1e3c64;
    --navy-500:#2c5686;
    --teal-500:#3f9c8e;
    --teal-300:#8fcfc2;
    --teal-050:#e9f4f1;

    --bg:#f3f4f2;
    --surface:#ffffff;
    --surface-2:#eceeea;
    --border:#dcdfda;
    --ink:#1c2731;
    --ink-soft:#54626b;
    --ink-faint:#8a9298;

    --accent:var(--teal-500);
    --accent-ink:#ffffff;

    --shadow-sm:0 1px 2px rgba(16,29,46,0.06), 0 1px 1px rgba(16,29,46,0.04);
    --shadow-md:0 8px 24px rgba(16,29,46,0.10), 0 2px 6px rgba(16,29,46,0.06);
    --shadow-lg:0 24px 60px rgba(16,29,46,0.18);

    --radius-s:3px;
    --radius-m:6px;

    --font-display:'Archivo', 'Arial Narrow', sans-serif;
    --font-body:'Public Sans', -apple-system, 'Segoe UI', sans-serif;
    --font-mono:'IBM Plex Mono', ui-monospace, monospace;
  }

  @media (prefers-color-scheme: dark){
    :root:not([data-theme="light"]){
      --bg:#0d1621;
      --surface:#132132;
      --surface-2:#182838;
      --border:#2a3c4f;
      --ink:#e7ecf0;
      --ink-soft:#a9b8c3;
      --ink-faint:#71838f;

      --navy-900:#0a1420;
      --navy-800:#0f1e30;
      --shadow-sm:0 1px 2px rgba(0,0,0,0.3);
      --shadow-md:0 8px 24px rgba(0,0,0,0.4);
      --shadow-lg:0 24px 60px rgba(0,0,0,0.55);
    }
  }
  :root[data-theme="dark"]{
    --bg:#0d1621;
    --surface:#132132;
    --surface-2:#182838;
    --border:#2a3c4f;
    --ink:#e7ecf0;
    --ink-soft:#a9b8c3;
    --ink-faint:#71838f;

    --navy-900:#0a1420;
    --navy-800:#0f1e30;
    --shadow-sm:0 1px 2px rgba(0,0,0,0.3);
    --shadow-md:0 8px 24px rgba(0,0,0,0.4);
    --shadow-lg:0 24px 60px rgba(0,0,0,0.55);
  }

  *{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;}
  body{
    margin:0;
    background:var(--bg);
    color:var(--ink);
    font-family:var(--font-body);
    font-size:16px;
    line-height:1.6;
    -webkit-font-smoothing:antialiased;
  }
  h1,h2,h3,h4{
    font-family:var(--font-display);
    color:var(--navy-800);
    font-weight:700;
    line-height:1.12;
    margin:0 0 0.5em;
    text-wrap:balance;
    letter-spacing:-0.01em;
  }
  :root[data-theme="dark"] h1, :root[data-theme="dark"] h2, :root[data-theme="dark"] h3, :root[data-theme="dark"] h4{ color:#f2f5f7; }
  @media (prefers-color-scheme: dark){ :root:not([data-theme="light"]) h1, :root:not([data-theme="light"]) h2, :root:not([data-theme="light"]) h3, :root:not([data-theme="light"]) h4{ color:#f2f5f7; } }
  p{margin:0 0 1em; color:var(--ink-soft); max-width:62ch;}
  a{color:inherit;}
  img{max-width:100%; display:block;}
  button{font-family:inherit;}
  .container{max-width:1120px; margin:0 auto; padding:0 28px;}
  .eyebrow{
    font-family:var(--font-mono);
    font-size:12px;
    letter-spacing:0.11em;
    text-transform:uppercase;
    color:var(--teal-500);
    display:flex; align-items:center; gap:10px;
    margin:0 0 14px;
  }
  .eyebrow::before{content:""; width:22px; height:2px; background:var(--teal-500); display:inline-block;}
  .btn{
    display:inline-flex; align-items:center; gap:8px;
    font-family:var(--font-display);
    font-weight:600;
    font-size:14.5px;
    letter-spacing:0.01em;
    padding:13px 24px;
    border-radius:var(--radius-s);
    border:1.5px solid transparent;
    cursor:pointer;
    text-decoration:none;
    transition:transform .15s ease, box-shadow .15s ease, background-color .15s ease, border-color .15s ease;
  }
  .btn:focus-visible{outline:2px solid var(--teal-500); outline-offset:2px;}
  .btn-primary{background:var(--teal-500); color:#ffffff; box-shadow:var(--shadow-sm);}
  .btn-primary:hover{background:#358d80; box-shadow:var(--shadow-md); transform:translateY(-1px);}
  .btn-ghost{background:transparent; border-color:rgba(255,255,255,0.42); color:#fff;}
  .btn-ghost:hover{background:rgba(255,255,255,0.1); border-color:#fff;}
  .btn-outline{background:transparent; border-color:var(--border); color:var(--navy-800);}
  :root[data-theme="dark"] .btn-outline{color:#f2f5f7;}
  @media (prefers-color-scheme: dark){ :root:not([data-theme="light"]) .btn-outline{color:#f2f5f7;} }
  .btn-outline:hover{border-color:var(--teal-500); color:var(--teal-500);}

  @media (prefers-reduced-motion: reduce){
    *{animation-duration:0.01ms !important; transition-duration:0.01ms !important;}
  }

  /* ============ Header ============ */
  header.site{
    position:sticky; top:0; z-index:40;
    background:var(--surface);
    border-bottom:1px solid var(--border);
  }
  .nav-row{
    display:flex; align-items:center; justify-content:space-between;
    height:76px;
  }
  .wordmark{display:flex; align-items:center; gap:12px; text-decoration:none; cursor:pointer; border:none; background:none; padding:0;}
  .wordmark-mark{
    width:34px; height:34px; position:relative; flex:none;
  }
  .wordmark-mark svg{width:100%; height:100%; display:block;}
  .wordmark-text{
    font-family:var(--font-display);
    font-weight:800;
    font-size:19px;
    letter-spacing:-0.01em;
    color:var(--navy-800);
    line-height:1.1;
  }
  :root[data-theme="dark"] .wordmark-text{color:#f2f5f7;}
  @media (prefers-color-scheme: dark){ :root:not([data-theme="light"]) .wordmark-text{color:#f2f5f7;} }
  .wordmark-text small{display:block; font-family:var(--font-mono); font-weight:500; font-size:9.5px; letter-spacing:0.14em; color:var(--ink-faint); text-transform:uppercase; margin-top:2px;}

  nav.primary{display:flex; align-items:center; gap:2px;}
  nav.primary a{
    font-family:var(--font-display); font-weight:600; font-size:14.5px;
    color:var(--ink-soft); text-decoration:none;
    padding:10px 16px; border-radius:var(--radius-s);
    position:relative;
  }
  nav.primary a:hover{color:var(--navy-800);}
  :root[data-theme="dark"] nav.primary a:hover{color:#f2f5f7;}
  @media (prefers-color-scheme: dark){ :root:not([data-theme="light"]) nav.primary a:hover{color:#f2f5f7;} }
  nav.primary a.active{color:var(--navy-800);}
  :root[data-theme="dark"] nav.primary a.active{color:#f2f5f7;}
  @media (prefers-color-scheme: dark){ :root:not([data-theme="light"]) nav.primary a.active{color:#f2f5f7;} }
  nav.primary a.active::after{
    content:""; position:absolute; left:16px; right:16px; bottom:4px; height:2px; background:var(--teal-500);
  }
  .nav-actions{display:flex; align-items:center; gap:10px;}
  .nav-toggle{display:none; background:none; border:1px solid var(--border); border-radius:var(--radius-s); width:40px; height:40px; align-items:center; justify-content:center; cursor:pointer;}
  .nav-toggle svg{width:19px; height:19px; stroke:var(--navy-800);}
  :root[data-theme="dark"] .nav-toggle svg{stroke:#f2f5f7;}
  @media (prefers-color-scheme: dark){ :root:not([data-theme="light"]) .nav-toggle svg{stroke:#f2f5f7;} }

  @media (max-width:840px){
    nav.primary{
      display:none;
      position:absolute; top:76px; left:0; right:0;
      background:var(--surface); border-bottom:1px solid var(--border);
      flex-direction:column; align-items:stretch; padding:8px 20px 18px; box-shadow:var(--shadow-md);
    }
    nav.primary.open{display:flex;}
    nav.primary a{padding:13px 4px; border-bottom:1px solid var(--surface-2);}
    nav.primary a.active::after{display:none;}
    .nav-toggle{display:inline-flex;}
    .nav-actions .btn-primary{display:none;}
  }

  /* ============ Hero ============ */
  .hero{
    position:relative;
    padding:0;
    background:linear-gradient(150deg, var(--navy-900) 0%, var(--navy-800) 46%, var(--teal-500) 132%);
    overflow:hidden;
    color:#fff;
  }
  .hero::before{
    content:"";
    position:absolute; inset:0;
    background-image:
      repeating-linear-gradient(115deg, rgba(255,255,255,0.05) 0 2px, transparent 2px 64px);
    pointer-events:none;
  }
  .hero-inner{
    position:relative;
    display:grid; grid-template-columns:1.15fr 0.85fr; gap:56px; align-items:center;
    padding-top:96px; padding-bottom:84px;
  }
  .hero-eyebrow{
    font-family:var(--font-mono); font-size:12px; letter-spacing:0.13em; text-transform:uppercase;
    color:var(--teal-300); display:flex; align-items:center; gap:10px; margin:0 0 22px;
  }
  .hero-eyebrow::before{content:""; width:22px; height:2px; background:var(--teal-300);}
  .hero h1{
    color:#fff; font-size:clamp(34px, 4.6vw, 56px); margin:0 0 22px; max-width:15ch;
  }
  .hero p.lead{color:rgba(255,255,255,0.82); font-size:18px; max-width:46ch; margin:0 0 34px;}
  .hero-ctas{display:flex; gap:14px; flex-wrap:wrap; margin-bottom:52px;}
  .hero-caps{
    display:flex; flex-wrap:wrap; gap:10px 28px;
  }
  .hero-caps div{
    display:flex; align-items:center; gap:9px;
    font-family:var(--font-display); font-weight:600; font-size:13.5px; color:rgba(255,255,255,0.88);
  }
  .hero-caps svg{width:16px; height:16px; flex:none; stroke:var(--teal-300);}

  .hero-plaque{
    position:relative;
    background:rgba(255,255,255,0.06);
    border:1px solid rgba(255,255,255,0.16);
    border-radius:var(--radius-m);
    padding:22px;
    backdrop-filter:blur(2px);
    box-shadow:var(--shadow-lg);
  }
  .hero-plaque img{border-radius:2px; width:100%;}
  .hero-plaque-cap{
    display:flex; justify-content:space-between; align-items:baseline;
    margin-top:16px; padding-top:14px; border-top:1px solid rgba(255,255,255,0.14);
    font-family:var(--font-mono); font-size:11px; letter-spacing:0.06em; color:rgba(255,255,255,0.6);
  }

  @media (max-width:900px){
    .hero-inner{grid-template-columns:1fr; padding-top:56px; padding-bottom:60px;}
    .hero-plaque{max-width:320px;}
  }

  /* ============ Generic sections ============ */
  section{padding:86px 0;}
  section.tight{padding:64px 0;}
  .section-head{max-width:640px; margin:0 0 48px;}
  .section-head.center{margin-left:auto; margin-right:auto; text-align:center;}
  .section-head h2{font-size:clamp(26px, 3vw, 36px);}

  .band-dark{background:var(--navy-800); color:#fff;}
  .band-dark p{color:rgba(255,255,255,0.72);}
  .band-dark h2, .band-dark h3{color:#fff;}
  .band-tint{background:var(--surface-2);}

  /* stat / capability strip */
  .cap-strip{
    display:grid; grid-template-columns:repeat(4,1fr); gap:1px;
    background:var(--border); border:1px solid var(--border); border-radius:var(--radius-m); overflow:hidden;
  }
  .cap-cell{background:var(--surface); padding:26px 22px;}
  .cap-cell .n{font-family:var(--font-mono); font-size:12px; color:var(--teal-500); letter-spacing:0.08em; margin-bottom:8px;}
  .cap-cell .t{font-family:var(--font-display); font-weight:700; font-size:16px; color:var(--navy-800); margin-bottom:4px;}
  :root[data-theme="dark"] .cap-cell .t{color:#f2f5f7;}
  @media (prefers-color-scheme: dark){ :root:not([data-theme="light"]) .cap-cell .t{color:#f2f5f7;} }
  .cap-cell .d{font-size:13.5px; color:var(--ink-faint); margin:0;}
  @media (max-width:760px){ .cap-strip{grid-template-columns:1fr 1fr;} }
  @media (max-width:480px){ .cap-strip{grid-template-columns:1fr;} }

  /* service cards */
  .grid-3{display:grid; grid-template-columns:repeat(3,1fr); gap:22px;}
  @media (max-width:900px){ .grid-3{grid-template-columns:1fr 1fr;} }
  @media (max-width:600px){ .grid-3{grid-template-columns:1fr;} }
  .svc-card{
    background:var(--surface); border:1px solid var(--border); border-radius:var(--radius-m);
    padding:28px 26px; position:relative; overflow:hidden;
    transition:box-shadow .18s ease, transform .18s ease, border-color .18s ease;
  }
  .svc-card::before{
    content:""; position:absolute; top:0; left:0; width:100%; height:3px;
    background:linear-gradient(90deg, var(--navy-700), var(--teal-500));
    transform:scaleX(0); transform-origin:left; transition:transform .25s ease;
  }
  .svc-card:hover{box-shadow:var(--shadow-md); transform:translateY(-2px); border-color:var(--border);}
  .svc-card:hover::before{transform:scaleX(1);}
  .svc-icon{width:38px; height:38px; margin-bottom:16px; color:var(--teal-500);}
  .svc-icon svg{width:100%; height:100%; stroke:currentColor;}
  .svc-card h3{font-size:17.5px; margin-bottom:8px;}
  .svc-card p{font-size:14.5px; margin-bottom:0;}
  .svc-tag{
    display:inline-block; margin-top:14px; font-family:var(--font-mono); font-size:10.5px;
    letter-spacing:0.08em; text-transform:uppercase; color:var(--ink-faint);
  }

  .cta-band{
    background:linear-gradient(120deg, var(--navy-800), var(--navy-700) 60%, var(--teal-500) 145%);
    border-radius:var(--radius-m);
    padding:52px 44px;
    display:flex; align-items:center; justify-content:space-between; gap:30px; flex-wrap:wrap;
    color:#fff;
  }
  .cta-band h3{color:#fff; margin-bottom:6px; font-size:24px;}
  .cta-band p{color:rgba(255,255,255,0.78); margin-bottom:0;}

  /* about */
  .split{display:grid; grid-template-columns:1fr 1fr; gap:64px; align-items:start;}
  @media (max-width:860px){ .split{grid-template-columns:1fr; gap:36px;} }
  .value-list{display:grid; gap:22px; margin-top:8px;}
  .value-item{display:flex; gap:16px;}
  .value-num{font-family:var(--font-mono); font-size:13px; color:var(--teal-500); padding-top:3px; flex:none; width:28px;}
  .value-item h4{font-size:16px; margin-bottom:4px;}
  .value-item p{font-size:14.5px; margin-bottom:0;}

  .quote-block{
    border-left:3px solid var(--teal-500); padding:4px 0 4px 24px; margin:36px 0 0;
  }
  .quote-block p{font-family:var(--font-display); font-size:19px; font-weight:600; color:var(--navy-800); font-style:normal; max-width:44ch;}
  :root[data-theme="dark"] .quote-block p{color:#f2f5f7;}
  @media (prefers-color-scheme: dark){ :root:not([data-theme="light"]) .quote-block p{color:#f2f5f7;} }

  /* enquiries / form */
  .form-wrap{display:grid; grid-template-columns:0.9fr 1.1fr; gap:48px; align-items:start;}
  @media (max-width:900px){ .form-wrap{grid-template-columns:1fr;} }
  .info-card{
    background:var(--navy-800); color:#fff; border-radius:var(--radius-m); padding:34px 30px;
  }
  .info-card h3{color:#fff; font-size:19px;}
  .info-card p{color:rgba(255,255,255,0.72); font-size:14.5px;}
  .info-row{display:flex; gap:14px; padding:16px 0; border-top:1px solid rgba(255,255,255,0.14);}
  .info-row:first-of-type{border-top:none; padding-top:22px;}
  .info-row svg{width:18px; height:18px; flex:none; margin-top:2px; stroke:var(--teal-300);}
  .info-row div{font-size:14px; color:rgba(255,255,255,0.92); line-height:1.5;}
  .info-row span{display:block; font-family:var(--font-mono); font-size:10.5px; letter-spacing:0.08em; text-transform:uppercase; color:var(--teal-300); margin-bottom:3px;}

  .form-card{
    background:var(--surface); border:1px solid var(--border); border-radius:var(--radius-m); padding:34px 32px;
    box-shadow:var(--shadow-sm);
  }
  .field{margin-bottom:18px;}
  .field label{
    display:block; font-family:var(--font-display); font-weight:600; font-size:13px;
    color:var(--navy-800); margin-bottom:7px;
  }
  :root[data-theme="dark"] .field label{color:#f2f5f7;}
  @media (prefers-color-scheme: dark){ :root:not([data-theme="light"]) .field label{color:#f2f5f7;} }
  .field .req{color:var(--teal-500);}
  .field input, .field select, .field textarea{
    width:100%; font-family:var(--font-body); font-size:14.5px; color:var(--ink);
    background:var(--bg); border:1px solid var(--border); border-radius:var(--radius-s);
    padding:11px 13px; transition:border-color .15s ease, box-shadow .15s ease;
  }
  .field input:focus, .field select:focus, .field textarea:focus{
    outline:none; border-color:var(--teal-500); box-shadow:0 0 0 3px rgba(63,156,142,0.18);
  }
  .field-row{display:grid; grid-template-columns:1fr 1fr; gap:16px;}
  @media (max-width:520px){ .field-row{grid-template-columns:1fr;} }
  .form-note{font-size:13px; color:var(--ink-faint); margin:4px 0 22px;}
  .form-status{
    margin-top:16px; padding:12px 14px; border-radius:var(--radius-s); font-size:13.5px;
    background:var(--teal-050); color:#1f5b50; border:1px solid var(--teal-300); display:none;
  }
  :root[data-theme="dark"] .form-status{background:rgba(63,156,142,0.14); color:var(--teal-300); border-color:rgba(143,207,194,0.35);}
  @media (prefers-color-scheme: dark){ :root:not([data-theme="light"]) .form-status{background:rgba(63,156,142,0.14); color:var(--teal-300); border-color:rgba(143,207,194,0.35);} }
  .form-status.show{display:block;}
  .form-status.error{background:#fdecea; color:#8a2c22; border-color:#e6a49a;}
  :root[data-theme="dark"] .form-status.error{background:rgba(220,90,70,0.14); color:#f0a596; border-color:rgba(220,90,70,0.35);}
  @media (prefers-color-scheme: dark){ :root:not([data-theme="light"]) .form-status.error{background:rgba(220,90,70,0.14); color:#f0a596; border-color:rgba(220,90,70,0.35);} }

  /* footer */
  footer.site{background:var(--navy-900); color:rgba(255,255,255,0.6); padding:56px 0 28px;}
  .foot-grid{display:grid; grid-template-columns:1.4fr 1fr 1fr; gap:40px; padding-bottom:40px; border-bottom:1px solid rgba(255,255,255,0.12);}
  @media (max-width:760px){ .foot-grid{grid-template-columns:1fr; gap:32px;} }
  .foot-grid h5{font-family:var(--font-mono); font-size:11px; letter-spacing:0.1em; text-transform:uppercase; color:rgba(255,255,255,0.4); margin:0 0 16px;}
  .foot-grid a{display:block; color:rgba(255,255,255,0.72); text-decoration:none; font-size:14px; margin-bottom:10px;}
  .foot-grid a:hover{color:var(--teal-300);}
  .foot-bottom{display:flex; justify-content:space-between; align-items:center; padding-top:24px; font-size:12.5px; flex-wrap:wrap; gap:10px;}
  .foot-brand{display:flex; align-items:center; gap:10px; color:rgba(255,255,255,0.85); font-family:var(--font-display); font-weight:700; font-size:15px;}
  .foot-brand .wordmark-mark{width:26px; height:26px;}

  /* page transition */
  .page{display:none; animation:fadeUp .38s ease both;}
  .page.active{display:block;}
  @keyframes fadeUp{ from{opacity:0; transform:translateY(8px);} to{opacity:1; transform:none;} }
  @media (prefers-reduced-motion: reduce){ .page{animation:none;} }