:root{
    --radius-sm:8px; --radius-md:16px; --radius-lg:24px;
    --space-5:48px; --space-6:72px; --space-7:112px;
  }

  /* ============ NIGHT (dark) theme ============ */
  html[data-theme="dark"]{
    --brand:#0F75BC; --brand-bright:#3FA3E0; --brand-glow:rgba(63,163,224,.30);
    --ink:#070B14; --navy:#0A101D; --navy-2:#0F1830;
    --line:rgba(63,163,224,.16); --line-2:rgba(255,255,255,.06);
    --text:#E8EDF5; --text-muted:#9AA7B8; --text-dim:#64748B;
    --white:#FFFFFF; --gold:#F5B21A;
    --link-hover:#7BC6F4;
    --header-bg:rgba(7,11,20,.85);
    --logo-filter:brightness(0) invert(1);
    --hero-overlay:linear-gradient(90deg, rgba(7,11,20,.94) 0%, rgba(10,16,29,.72) 45%, rgba(7,11,20,.40) 100%);
    --svc-overlay:linear-gradient(180deg, rgba(7,11,20,.10) 0%, rgba(7,11,20,.65) 55%, rgba(7,11,20,.93) 100%);
    --input-bg:rgba(255,255,255,.04);
    --cta-bg:linear-gradient(135deg,#0F1830 0%,#0A101D 100%);
    --stroke-text:#3FA3E0;
  }

  /* ============ DAY (light) theme ============ */
  html[data-theme="light"]{
    --brand:#0F75BC; --brand-bright:#0B5A93; --brand-glow:rgba(15,117,188,.12);
    --ink:#FFFFFF; --navy:#F5F7FA; --navy-2:#FFFFFF;
    --line:rgba(26,29,35,.12); --line-2:rgba(26,29,35,.08);
    --text:#1A1D23; --text-muted:#5B6470; --text-dim:#8A94A0;
    --white:#1A1D23; --gold:#F5B21A;
    --link-hover:#0B5A93;
    --header-bg:rgba(255,255,255,.88);
    --logo-filter:none;
    --hero-overlay:linear-gradient(90deg, rgba(7,11,20,.85) 0%, rgba(10,16,29,.55) 45%, rgba(7,11,20,.25) 100%);
    --svc-overlay:linear-gradient(180deg, rgba(7,11,20,.10) 0%, rgba(7,11,20,.60) 55%, rgba(7,11,20,.90) 100%);
    --input-bg:rgba(26,29,35,.04);
    --cta-bg:linear-gradient(135deg,#EAF3FA 0%,#F5F7FA 100%);
    --stroke-text:#0F75BC;
  }

  *{ margin:0; padding:0; box-sizing:border-box; }
  html{ scroll-behavior:smooth; }
  body{ background:var(--ink); color:var(--text); font-family:'Inter',sans-serif; line-height:1.6; -webkit-font-smoothing:antialiased; overflow-x:hidden; transition:background .4s ease, color .4s ease; }
  h1,h2,h3,h4{ font-family:'Barlow',sans-serif; font-weight:800; line-height:1.05; letter-spacing:-.02em; }
  a{ color:var(--brand-bright); text-decoration:none; transition:color .2s; }
  a:hover{ color:var(--link-hover); }
  img{ max-width:100%; }
  .container{ max-width:1240px; margin:0 auto; padding:0 24px; }

  /* Visible focus for keyboard users (both themes) */
  a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible{
    outline:3px solid var(--brand-bright); outline-offset:2px;
  }

  .eyebrow{ font-size:13px; font-weight:600; text-transform:uppercase; letter-spacing:.2em; color:var(--brand-bright); display:inline-flex; align-items:center; gap:12px; }
  .eyebrow::before{ content:""; width:32px; height:2px; background:var(--brand-bright); }
  .section{ padding:var(--space-7) 0; position:relative; }
  .section-head{ max-width:640px; margin-bottom:var(--space-6); }
  .section-head h2{ font-size:56px; margin:18px 0 20px; }
  .section-head h2 span{ color:var(--brand-bright); }
  .section-head p{ color:var(--text-muted); font-size:18px; max-width:560px; }

  .btn{ display:inline-block; padding:16px 32px; border-radius:10px; font-weight:700; font-size:15px; font-family:'Barlow',sans-serif; letter-spacing:.02em; cursor:pointer; border:none; transition:all .25s ease; }
  .btn-primary{ background:linear-gradient(135deg, var(--brand) 0%, #3FA3E0 100%); color:#FFFFFF !important; box-shadow:0 8px 24px var(--brand-glow); }
  .btn-primary:hover{ transform:translateY(-3px); box-shadow:0 16px 40px var(--brand-glow); color:#FFFFFF; }
  .btn-ghost{ background:transparent; color:var(--white); border:1px solid var(--line); }
  .btn-ghost:hover{ border-color:var(--brand-bright); background:var(--brand-glow); transform:translateY(-3px); }
  /* Hero buttons sit on the dark photo in BOTH themes — keep them light */
  .hero .btn-ghost{ color:#FFFFFF; }

  /* Header — floating glass */
  .header{ position:fixed; top:0; left:0; right:0; z-index:100; padding:20px 0; transition:all .3s; }
  .header.scrolled{ background:var(--header-bg); backdrop-filter:blur(16px); -webkit-backdrop-filter:blur(16px); padding:14px 0; border-bottom:1px solid var(--line); }
  .header-inner{ display:flex; align-items:center; justify-content:space-between; gap:24px; }
  .logo img{ height:36px; display:block; filter:var(--logo-filter); transition:filter .4s ease; }
  .nav{ display:flex; gap:34px; align-items:center; }
  .nav a{ color:var(--text-muted); font-size:15px; font-weight:500; }
  .nav a:hover{ color:var(--brand-bright); }
  .nav .btn{ padding:12px 22px; }
  .header-actions{ display:flex; gap:12px; align-items:center; }

  .hamburger{ display:none; background:none; border:none; color:var(--text); font-size:26px; cursor:pointer; padding:6px; line-height:1; }
  .header:not(.scrolled) .hamburger{ color:#FFFFFF; }

  /* Mobile slide-down menu */
  .mobile-menu{ position:fixed; top:0; left:0; right:0; z-index:99; background:var(--ink); border-bottom:1px solid var(--line); padding:88px 24px 28px; transform:translateY(-100%); transition:transform .35s ease; }
  .mobile-menu.open{ transform:translateY(0); }
  .mobile-menu a{ display:block; padding:14px 0; border-bottom:1px solid var(--line); color:var(--text); font-size:18px; font-weight:600; font-family:'Barlow',sans-serif; }
  .mobile-menu a:last-of-type{ border-bottom:none; }
  .mobile-menu .btn{ text-align:center; margin-top:16px; }

  /* Theme toggle button */
  .theme-toggle{ display:inline-flex; align-items:center; justify-content:center; width:44px; height:44px; border-radius:50%; border:1px solid var(--line); background:transparent; color:var(--text); font-size:18px; cursor:pointer; transition:all .25s; padding:0; }
  .theme-toggle svg{ width:20px; height:20px; fill:none; stroke:currentColor; stroke-width:2; stroke-linecap:round; stroke-linejoin:round; }
  .theme-toggle:hover{ border-color:var(--brand-bright); color:var(--brand-bright); transform:rotate(15deg); }
  html[data-theme="dark"] .theme-toggle .icon-sun{ display:none; }
  html[data-theme="light"] .theme-toggle .icon-moon{ display:none; }
  .header:not(.scrolled) .theme-toggle{ color:#FFFFFF; border-color:rgba(255,255,255,.30); }
  .header:not(.scrolled) .theme-toggle:hover{ color:#7BC6F4; border-color:#7BC6F4; }

  /* Hero — split layout: text left, three vertical tiles right.
     The asset images are white-background product cutouts, so they must
     sit on light tile surfaces (like the service cards), not be stretched
     full-bleed under a dark overlay. */
  .hero{ position:relative; min-height:100svh; display:flex; flex-direction:column; justify-content:center;
          padding:140px 0 96px;
          background:linear-gradient(135deg,#0A101D 0%,#0F2A46 55%,#0B5A93 100%); }
  .hero > .container{ flex:1; display:flex; align-items:center; width:100%; }
  html[data-theme="light"] .hero{ background:linear-gradient(135deg,#EAF3FA 0%,#D3E7F4 55%,#7BC6F4 100%); }
  .hero-grid{ display:grid; grid-template-columns:1.05fr .95fr; gap:56px; align-items:center; position:relative; z-index:2; }
  .hero-glow{ position:absolute; top:-20%; right:-10%; width:60%; height:60%; background:radial-gradient(circle, var(--brand-glow) 0%, transparent 65%); pointer-events:none; z-index:1; }
  .hero-content{ max-width:820px; }
  .hero h1{ font-size:88px; font-weight:900; line-height:.98; margin-bottom:26px; color:#FFFFFF; }
  html[data-theme="light"] .hero h1{ color:#0A1F30; }
  .hero h1 span{ color:transparent; -webkit-text-stroke:2px var(--stroke-text); }
  html[data-theme="light"] .hero h1 span{ -webkit-text-stroke-color:#0F75BC; }
  .hero .eyebrow{ color:#7BC6F4; }
  html[data-theme="light"] .hero .eyebrow{ color:#0B5A93; }
  .hero p{ font-size:20px; color:rgba(255,255,255,.80); max-width:560px; margin-bottom:40px; }
  html[data-theme="light"] .hero p{ color:rgba(10,31,48,.85); }
  .hero-cta{ display:flex; gap:18px; flex-wrap:wrap; }
  html[data-theme="light"] .hero .btn-ghost{ color:#0A1F30; border-color:rgba(10,31,48,.4); }

  /* Hero vertical tiles — auto / marine / architectural */
  .hero-tiles{ display:grid; grid-template-rows:1fr 1fr; grid-template-columns:1fr 1fr; gap:18px; }
  .tile{ position:relative; border-radius:var(--radius-md); overflow:hidden; border:1px solid var(--line-2);
         background:#FFFFFF; box-shadow:0 18px 40px rgba(4,10,20,.35); transition:transform .3s; display:block; }
  .tile:hover{ transform:translateY(-4px); }
  .tile.auto{ grid-column:1 / -1; }
  .tile img{ width:100%; height:100%; object-fit:contain; display:block; padding:12px; }
  .tile.auto{ aspect-ratio:16/9; }
  .tile.half{ aspect-ratio:1/1; }
  .tile .tag{ position:absolute; left:14px; bottom:14px; padding:6px 12px; border-radius:6px;
              background:rgba(7,17,32,.72); color:#FFFFFF; font-family:'Barlow'; font-size:12px;
              font-weight:700; letter-spacing:.14em; text-transform:uppercase; backdrop-filter:blur(4px); }

  .hero-meta{ position:absolute; bottom:0; left:0; right:0; border-top:1px solid rgba(255,255,255,.12); background:rgba(7,11,20,.28); backdrop-filter:blur(10px); -webkit-backdrop-filter:blur(10px); }
  html[data-theme="light"] .hero-meta{ background:rgba(255,255,255,.5); border-top-color:rgba(26,29,35,.10); }
  .hero-meta-inner{ display:flex; }
  .hero-meta .cell{ flex:1; padding:26px 24px; border-right:1px solid var(--line); }
  .hero-meta .cell:last-child{ border-right:none; }
  .hero-meta .num{ font-family:'Barlow'; font-size:34px; font-weight:800; color:var(--brand-bright); line-height:1; }
  .hero-meta .lbl{ color:var(--text-dim); font-size:13px; text-transform:uppercase; letter-spacing:.14em; margin-top:8px; }

  /* Marquee strip */
  .marquee{ border-top:1px solid var(--line); border-bottom:1px solid var(--line); padding:20px 0; overflow:hidden; background:var(--navy); transition:background .4s ease; }
  .marquee-track{ display:flex; gap:60px; white-space:nowrap; animation:marquee 28s linear infinite; width:max-content; }
  .marquee span{ font-family:'Barlow'; font-weight:700; font-size:15px; letter-spacing:.18em; text-transform:uppercase; color:var(--text-dim); }
  .marquee span b{ color:var(--brand-bright); margin:0 8px; }
  @keyframes marquee{ to{ transform:translateX(-50%); } }

  /* Services — three equal verticals */
  .svc-list{ display:grid; grid-template-columns:repeat(3,1fr); gap:28px; }
  .svc{ position:relative; border-radius:var(--radius-lg); overflow:hidden; min-height:320px; border:1px solid var(--line-2); cursor:pointer; transition:transform .3s; display:block; color:#FFFFFF; }
  .svc:hover{ transform:translateY(-4px); }
  .svc img{ position:absolute; inset:0; width:100%; height:100%; object-fit:cover; transition:transform .6s ease; }
  .svc:hover img{ transform:scale(1.06); }
  .svc .overlay{ position:absolute; inset:0; background:var(--svc-overlay); }
  .svc .body{ position:absolute; bottom:0; left:0; right:0; padding:30px; }
  .svc .idx{ font-family:'Barlow'; font-size:13px; font-weight:600; letter-spacing:.2em; color:#7BC6F4; }
  .svc h3{ font-size:30px; margin:10px 0 8px; color:#FFFFFF; }
  .svc p{ color:rgba(255,255,255,.78); font-size:15px; max-width:400px; }
  .svc .go{ position:absolute; top:26px; right:26px; width:46px; height:46px; border-radius:50%; border:1px solid rgba(255,255,255,.35); display:flex; align-items:center; justify-content:center; color:#7BC6F4; transition:all .3s; }
  .svc:hover .go{ background:var(--brand); color:#FFFFFF; }

  /* Featured */
  .feat{ background:var(--navy); border-top:1px solid var(--line); border-bottom:1px solid var(--line); transition:background .4s ease; }
  .feat-grid{ display:grid; grid-template-columns:1.1fr 1fr; gap:60px; align-items:center; }
  .feat-img{ border-radius:var(--radius-lg); overflow:hidden; border:1px solid var(--line); position:relative; aspect-ratio:4/3; }
  .feat-img img{ width:100%; height:100%; object-fit:cover; }
  .feat-img::after{ content:""; position:absolute; inset:0; background:linear-gradient(135deg, var(--brand-glow), transparent 60%); }
  .feat .big{ font-family:'Barlow'; font-size:120px; font-weight:900; color:var(--brand-bright); line-height:.9; }
  .feat h2{ font-size:44px; margin:18px 0 16px; }
  .feat p{ color:var(--text-muted); font-size:17px; max-width:480px; margin-bottom:32px; }
  .check{ list-style:none; }
  .check li{ padding:12px 0; border-bottom:1px solid var(--line); color:var(--text-muted); display:flex; gap:14px; align-items:baseline; }
  .check li::before{ content:"→"; color:var(--brand-bright); font-weight:700; }

  /* Reviews */
  .rev-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
  .rev{ background:var(--navy-2); border:1px solid var(--line); border-radius:var(--radius-md); padding:28px; transition:transform .3s, background .4s ease; }
  .rev:hover{ transform:translateY(-4px); }
  .stars{ color:var(--gold); letter-spacing:3px; font-size:15px; margin-bottom:16px; }
  .rev p{ color:var(--text); font-size:15px; margin-bottom:20px; }
  .rev .who{ color:var(--text-dim); font-size:14px; }
  .rev-score{ text-align:right; }
  .rev-score .big-num{ font-family:'Barlow'; font-size:64px; font-weight:800; color:var(--white); }
  .rev-score .lbl{ color:var(--text-dim); font-size:13px; text-transform:uppercase; letter-spacing:.12em; }

  /* Locations */
  .loc-grid{ display:grid; grid-template-columns:1fr 1fr; gap:28px; }
  .loc{ background:var(--navy-2); border:1px solid var(--line); border-radius:var(--radius-lg); padding:34px; transition:background .4s ease; }
  .loc .tag{ font-size:12px; font-weight:600; letter-spacing:.2em; color:var(--brand-bright); text-transform:uppercase; }
  .loc h3{ font-size:28px; margin:12px 0 22px; }
  .loc .row{ display:flex; gap:16px; padding:14px 0; border-top:1px solid var(--line); color:var(--text-muted); font-size:15px; }
  .loc .row b{ color:var(--white); min-width:86px; font-weight:600; }
  .loc .phone{ font-family:'Barlow'; font-size:22px; font-weight:700; color:var(--brand-bright); }

  /* Final CTA */
  .cta{ background:var(--cta-bg); border-top:1px solid var(--line); text-align:center; transition:background .4s ease; }
  .cta-inner{ max-width:620px; margin:0 auto; }
  .cta h2{ font-size:52px; margin:18px 0 16px; }
  .cta h2 span{ color:var(--brand-bright); }
  .cta p{ color:var(--text-muted); margin-bottom:40px; font-size:17px; }
  .form{ display:grid; grid-template-columns:1fr 1fr; gap:14px; text-align:left; }
  .form .full{ grid-column:1 / -1; }
  .form input,.form select,.form textarea{ width:100%; padding:15px 18px; border-radius:10px; border:1px solid var(--line); background:var(--input-bg); color:var(--white); font-family:'Inter'; font-size:15px; }
  .form input::placeholder,.form textarea::placeholder{ color:var(--text-dim); }
  .form select option{ color:var(--text); background:var(--navy); }
  html[data-theme="light"] .form select option{ background:#FFFFFF; }
  .form textarea{ min-height:100px; resize:vertical; }
  .form .btn{ width:100%; }

  /* Footer */
  .footer{ border-top:1px solid var(--line); padding:var(--space-6) 0 0; background:var(--ink); transition:background .4s ease; }
  .footer-grid{ display:grid; grid-template-columns:1.6fr 1fr 1.1fr 1.15fr; gap:40px; padding-bottom:44px; }
  .footer h4{ font-size:14px; letter-spacing:.14em; text-transform:uppercase; color:var(--text-dim); margin-bottom:20px; font-weight:600; }
  .footer p,.footer a{ color:var(--text-muted); font-size:14px; }
  .footer ul{ list-style:none; }
  .footer li{ margin-bottom:10px; }
  .newsletter{ display:flex; gap:8px; margin-top:16px; }
  .newsletter input{ flex:1; padding:12px 14px; border-radius:10px; border:1px solid var(--line); background:var(--input-bg); color:var(--white); font-family:'Inter'; }
  .newsletter button{ padding:12px 16px; border-radius:10px; border:none; cursor:pointer; background:var(--brand); color:#FFFFFF; font-weight:600; }
  .footer-bottom{ border-top:1px solid var(--line); padding:20px 0; text-align:center; color:var(--text-dim); font-size:13px; }

  @media (max-width: 992px){
    .hero-grid{ grid-template-columns:1fr; gap:44px; }
    .hero h1{ font-size:54px; }
    .hero-tiles{ max-width:520px; }
    .feat-grid{ grid-template-columns:1fr; }
    .svc-list{ grid-template-columns:1fr; }
    .rev-grid{ grid-template-columns:1fr; }
    .loc-grid{ grid-template-columns:1fr; }
    .footer-grid{ grid-template-columns:1fr 1fr; }
    .hero-meta-inner{ flex-wrap:wrap; }
    .hero-meta .cell{ flex:1 1 50%; }
  }
  @media (max-width: 640px){
    .hero{ min-height:auto; padding:120px 0 92px; }
    .hero > .container{ display:block; }
    .hero h1{ font-size:40px; }
    .hero-tiles{ grid-template-rows:auto; }
    .section-head h2{ font-size:34px; }
    .cta h2{ font-size:36px; }
    .feat .big{ font-size:72px; }
    .form{ grid-template-columns:1fr; }
    .footer-grid{ grid-template-columns:1fr; }
    .nav{ display:none; } .hamburger{ display:block; }
  }

  /* Respect users who prefer less motion */
  @media (prefers-reduced-motion: reduce){
    *{ animation:none !important; transition:none !important; scroll-behavior:auto !important; }
    html{ scroll-behavior:auto; }
  }