*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
    :root {
      --navy: #263359; --navy-deep: #1a2440; --navy-darker: #111a30;
      --cyan: #75fae2; --cyan-dim: rgba(117,250,226,.15);
      --purple: #7b4ff5; --purple-deep: #560ff3;
      --surface: rgba(255,255,255,.04); --surface-hover: rgba(255,255,255,.07);
      --border: rgba(255,255,255,.08); --border-light: rgba(255,255,255,.12);
      --text-primary: #fff; --text-secondary: rgba(255,255,255,.65); --text-muted: rgba(255,255,255,.4);
      --font-display: 'Outfit', system-ui, sans-serif;
      --font-body: 'DM Sans', system-ui, sans-serif;
      --radius: 14px; --radius-lg: 22px; --radius-xl: 32px;
    }
    html { scroll-behavior: smooth; font-size: 16px; overscroll-behavior: none; }
    body { font-family: var(--font-body); background: var(--navy-deep); color: var(--text-primary); line-height: 1.6; -webkit-font-smoothing: antialiased; overflow-x: hidden; }
    ::selection { background: var(--cyan); color: var(--navy-deep); }

    /* LOADER */
    .loader {
      position: fixed; inset: 0; z-index: 9999;
      background: var(--navy-darker);
      display: flex; align-items: center; justify-content: center; flex-direction: column; gap: 1.5rem;
      transition: opacity .5s ease, visibility .5s ease;
    }
    .loader.hidden { opacity: 0; visibility: hidden; pointer-events: none; }
    .loader-logo { height: 70px; opacity: 0; animation: loaderFadeIn .4s .05s ease forwards; }
    .loader-bar { width: 160px; height: 3px; background: var(--border); border-radius: 10px; overflow: hidden; }
    .loader-bar-inner {
      height: 100%; width: 0%;
      background: linear-gradient(90deg, var(--cyan), var(--purple));
      border-radius: 10px;
      animation: loaderFill .85s .15s cubic-bezier(.4, 0, .2, 1) forwards;
    }
    @keyframes loaderFadeIn { to { opacity: 1; } }
    @keyframes loaderFill { to { width: 100%; } }

    .container { max-width: 1280px; margin: 0 auto; padding: 0 2rem; }
    .gradient-text { background: linear-gradient(135deg, var(--cyan), var(--purple)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

    /* NAV */
    nav { position: fixed; top: 0; left: 0; right: 0; z-index: 100; padding: 1rem 2rem; border-bottom: 1px solid transparent; transition: border-color .5s; }
    nav::before { content: ''; position: absolute; inset: 0; z-index: -1; background: rgba(26,36,64,.85); backdrop-filter: blur(24px) saturate(1.4); -webkit-backdrop-filter: blur(24px) saturate(1.4); opacity: 0; transition: opacity .5s; pointer-events: none; }
    nav.scrolled { border-bottom-color: var(--border); }
    nav.scrolled::before { opacity: 1; }
    .nav-inner { max-width: 1280px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; }
    .logo-link { text-decoration: none; display: flex; align-items: center; }
    .logo-link img { height: 34px; }
    .nav-links { display: flex; gap: 2rem; align-items: center; }
    .nav-links a { font-family: var(--font-display); font-size: .78rem; font-weight: 500; color: var(--text-secondary); text-decoration: none; letter-spacing: .04em; text-transform: uppercase; transition: color .25s; }
    .nav-links a:hover { color: var(--cyan); }
    .nav-cta { background: var(--cyan) !important; color: var(--navy-deep) !important; padding: .55rem 1.3rem !important; border-radius: 100px; font-weight: 700 !important; }
    /* NAV DROPDOWN */
    .nav-dropdown { position: relative; display: flex; align-items: center; }
    .nav-dropdown::after { content: ''; position: absolute; top: 100%; left: 0; right: 0; height: 1.25rem; }
    .nav-dropdown > a { display: flex; align-items: center; gap: .3rem; }
    .nav-dropdown > a .ndrop-chevron { transition: transform .25s; margin-top: 1px; }
    .nav-dropdown:hover > a .ndrop-chevron { transform: rotate(180deg); }
    .nav-dropdown-menu { position: absolute; top: 100%; left: 50%; transform: translateX(-50%) translateY(-6px); width: 520px; background: rgba(6,10,32,.97); backdrop-filter: blur(24px) saturate(180%); -webkit-backdrop-filter: blur(24px) saturate(180%); border: 1px solid rgba(117,250,226,.13); border-radius: 16px; padding: 1.25rem; display: grid; grid-template-columns: 1fr 1fr; gap: 0 .75rem; opacity: 0; pointer-events: none; transition: opacity .2s ease, transform .2s ease; z-index: 500; box-shadow: 0 24px 64px rgba(0,0,0,.6); }
    .nav-dropdown:hover .nav-dropdown-menu { opacity: 1; pointer-events: auto; transform: translateX(-50%) translateY(0); }
    .ndm-col-label { font-family: var(--font-display); font-size: .62rem; font-weight: 700; letter-spacing: .09em; text-transform: uppercase; color: var(--cyan); padding: .2rem .75rem .5rem; border-bottom: 1px solid rgba(117,250,226,.1); margin-bottom: .35rem; }
    .nav-dropdown-menu a { display: flex !important; align-items: center !important; padding: .45rem .75rem !important; border-radius: 8px !important; font-size: .72rem !important; font-weight: 500 !important; color: rgba(180,195,230,.8) !important; text-transform: none !important; letter-spacing: .01em !important; transition: background .18s, color .18s !important; white-space: nowrap; }
    .nav-dropdown-menu a:hover { background: rgba(117,250,226,.08) !important; color: var(--white) !important; }
    .hamburger { display: none; background: none; border: none; cursor: pointer; width: 28px; height: 20px; position: relative; z-index: 200; touch-action: manipulation; -webkit-tap-highlight-color: transparent; }
    .hamburger span { display: block; width: 100%; height: 2px; background: #fff; position: absolute; left: 0; transition: .3s; }
    .hamburger span:nth-child(1) { top: 0; } .hamburger span:nth-child(2) { top: 9px; } .hamburger span:nth-child(3) { top: 18px; }
    .hamburger.active span:nth-child(1) { top: 9px; transform: rotate(45deg); }
    .hamburger.active span:nth-child(2) { opacity: 0; }
    .hamburger.active span:nth-child(3) { top: 9px; transform: rotate(-45deg); }
    .scroll-progress { position: fixed; top: 0; left: 0; height: 3px; z-index: 999; background: linear-gradient(90deg, var(--cyan), var(--purple)); width: 0%; }
    .reveal { opacity: 0; transform: translateY(40px); transition: opacity .7s cubic-bezier(.16,1,.3,1), transform .7s cubic-bezier(.16,1,.3,1); }
    .reveal.visible { opacity: 1; transform: translateY(0); }

    /* PAGE HEADER */
    .page-header { padding: 8rem 0 3rem; text-align: center; border-bottom: 1px solid var(--border); background: var(--navy); position: relative; overflow: hidden; }
    .page-header::before { content: ''; position: absolute; top: -200px; right: -200px; width: 500px; height: 500px; background: radial-gradient(circle, rgba(117,250,226,.1), transparent 65%); pointer-events: none; }
    .page-header h1 { font-family: var(--font-display); font-size: clamp(2rem,4vw,3rem); font-weight: 700; margin-bottom: .5rem; }
    .page-header p { color: var(--text-secondary); font-size: 1.05rem; max-width: 600px; margin: 0 auto; }
    .page-header .product-count { display: inline-flex; align-items: center; gap: .5rem; margin-top: 1rem; font-family: var(--font-display); font-size: .75rem; font-weight: 600; color: var(--cyan); letter-spacing: .06em; text-transform: uppercase; }
    .page-header .product-count::before { content: ''; width: 20px; height: 2px; background: var(--cyan); }

    /* FILTER */
    .filter-bar { display: flex; gap: .5rem; justify-content: center; padding: 2rem 0 .5rem; flex-wrap: wrap; }
    .filter-btn { font-family: var(--font-display); font-size: .72rem; font-weight: 600; padding: .55rem 1.2rem; border-radius: 100px; border: 1px solid var(--border); background: transparent; color: var(--text-muted); cursor: pointer; transition: all .3s; text-transform: uppercase; letter-spacing: .03em; }
    .filter-btn:hover { color: var(--text-primary); border-color: var(--border-light); }
    .filter-btn.active { background: var(--cyan); color: var(--navy-deep); border-color: var(--cyan); }

    /* CATALOG GRID */
    .catalog-section { padding: 1rem 0 5rem; }
    .catalog-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; margin-top: 2rem; }
    a.catalog-card { text-decoration: none; color: inherit; }
    .catalog-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; cursor: pointer; transition: border-color .3s, transform .3s, box-shadow .3s; display: flex; flex-direction: column; }
    .catalog-card::before { content: ''; display: block; height: 2px; background: linear-gradient(90deg, var(--cyan), var(--purple)); opacity: 0; transition: opacity .3s; }
    .catalog-card:hover { border-color: rgba(117,250,226,.25); transform: translateY(-5px); box-shadow: 0 20px 50px rgba(0,0,0,.25); }
    .catalog-card:hover::before { opacity: 1; }
    .cc-thumb { height: 180px; overflow: hidden; background: var(--navy-darker); }
    .cc-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
    .catalog-card:hover .cc-thumb img { transform: scale(1.05); }
    .cc-body { padding: 1.25rem 1.5rem .75rem; flex: 1; }
    .cc-cat { display: flex; align-items: center; gap: .4rem; font-family: var(--font-display); font-size: .62rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--cyan); margin-bottom: .5rem; }
    .cc-cat-icon svg { width: 13px; height: 13px; color: var(--cyan); }
    .cc-body h3 { font-family: var(--font-display); font-size: 1rem; font-weight: 700; margin-bottom: .35rem; line-height: 1.25; }
    .cc-body p { font-size: .8rem; color: var(--text-muted); line-height: 1.5; }
    .cc-bottom { padding: .75rem 1.5rem 1.25rem; display: flex; align-items: center; justify-content: space-between; }
    .cc-certs { display: flex; flex-wrap: wrap; gap: .25rem; }
    .cert-tag { font-family: var(--font-display); font-size: .6rem; font-weight: 600; padding: .2rem .5rem; background: rgba(117,250,226,.08); border: 1px solid rgba(117,250,226,.12); border-radius: 100px; color: var(--cyan); letter-spacing: .02em; }
    .cc-btn { font-family: var(--font-display); font-size: .7rem; font-weight: 700; color: var(--cyan); background: none; border: none; cursor: pointer; display: flex; align-items: center; gap: .3rem; text-transform: uppercase; white-space: nowrap; transition: gap .2s; }
    .cc-btn:hover { gap: .55rem; }

    /* MODAL */
    .modal-overlay { position: fixed; inset: 0; z-index: 1000; background: rgba(17,26,48,.88); backdrop-filter: blur(10px); display: none; align-items: flex-start; justify-content: center; padding: 2rem; overflow-y: auto; }
    .modal-overlay.open { display: flex; animation: fadeIn .25s ease; }
    @keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
    .modal-content { background: var(--navy); border: 1px solid var(--border-light); border-radius: var(--radius-xl); max-width: 860px; width: 100%; position: relative; margin: 2rem auto; animation: modalSlide .35s ease; }
    @keyframes modalSlide { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
    .modal-close { position: sticky; top: 1rem; float: right; z-index: 10; width: 38px; height: 38px; border-radius: 50%; background: var(--surface); border: 1px solid var(--border); color: var(--text-secondary); font-size: 1.4rem; cursor: pointer; display: flex; align-items: center; justify-content: center; transition: all .2s; margin: 1rem 1rem 0 0; }
    .modal-close:hover { background: var(--cyan); color: var(--navy-deep); }
    .modal-scroll { padding: 1rem 2.5rem 2.5rem; }

    .modal-header { margin-bottom: 1.5rem; }
    .modal-header h2 { font-family: var(--font-display); font-size: 1.6rem; font-weight: 700; margin-bottom: .3rem; }
    .modal-tagline { color: var(--text-secondary); font-style: italic; font-size: .9rem; }
    .pcl { display: inline-flex; align-items: center; gap: .45rem; font-family: var(--font-display); font-size: .65rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--cyan); margin-bottom: .5rem; }
    .pcl-icon svg { width: 14px; height: 14px; color: var(--cyan); }
    .certs-row { display: flex; flex-wrap: wrap; gap: .35rem; }

    /* Video embed */
    .video-embed { position: relative; width: 100%; padding-bottom: 56.25%; border-radius: var(--radius); overflow: hidden; margin-bottom: 1.75rem; border: 1px solid var(--border); background: var(--navy-darker); }
    .video-embed iframe { position: absolute; top: 0; left: 0; width: 100%; height: 100%; border: 0; }

    .modal-body { display: flex; flex-direction: column; gap: 1.75rem; }
    .modal-section h3, .modal-card h3, .install-section h3, .comp-section h3 { font-family: var(--font-display); font-size: .82rem; font-weight: 700; color: var(--cyan); margin-bottom: .6rem; letter-spacing: .04em; text-transform: uppercase; }
    .modal-section p { font-size: .88rem; color: var(--text-secondary); line-height: 1.75; margin-bottom: .5rem; }
    .modal-section p strong { color: var(--text-primary); }
    .tech-p { color: var(--text-muted) !important; font-size: .84rem !important; }
    .tech-p strong { color: var(--text-secondary) !important; }

    .modal-two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
    .modal-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.5rem; }
    .benefits-list { list-style: none; display: flex; flex-direction: column; gap: .5rem; }
    .benefits-list li { display: flex; align-items: flex-start; gap: .5rem; font-size: .82rem; color: var(--text-secondary); line-height: 1.5; }
    .benefits-list li svg { flex-shrink: 0; margin-top: 2px; }
    .specs-table { width: 100%; border-collapse: collapse; }
    .specs-table td { padding: .5rem .4rem; font-size: .8rem; border-bottom: 1px solid var(--border); vertical-align: top; }
    .specs-table td:first-child { color: var(--text-muted); font-weight: 500; width: 40%; white-space: nowrap; }
    .specs-table td:last-child { color: var(--text-secondary); }

    /* Installation gallery */
    .install-section { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.5rem; }
    .install-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: .75rem; }
    .install-item { border-radius: 10px; overflow: hidden; border: 1px solid var(--border); background: var(--navy-darker); }
    .install-item img { width: 100%; height: 140px; object-fit: cover; object-position: top; display: block; }
    .install-item span { display: block; padding: .4rem .6rem; font-size: .68rem; color: var(--text-muted); line-height: 1.4; }

    /* Certification logos */
    .cert-logos-row { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem; margin-top: .75rem; padding: .5rem 0; }
    .cert-logos-row img { height: 52px; width: auto; opacity: .9; transition: opacity .3s, transform .3s; border-radius: 8px; background: rgba(255,255,255,.9); padding: 5px 10px; }
    .cert-logos-row img:hover { opacity: 1; transform: scale(1.05); }
    .install-note { margin-top: .75rem; font-size: .75rem; color: var(--purple); font-weight: 500; }

    /* Complementary product */
    .comp-section { background: linear-gradient(135deg, rgba(117,250,226,.04), rgba(123,79,245,.04)); border: 1px solid var(--border-light); border-radius: var(--radius); padding: 1.5rem; }
    .comp-card { font-size: .85rem; color: var(--text-secondary); line-height: 1.7; }
    .comp-card strong { color: var(--cyan); font-size: .9rem; display: block; margin-bottom: .3rem; }

    .modal-footer { margin-top: 1.75rem; text-align: center; padding-top: 1.5rem; border-top: 1px solid var(--border); }
    .btn-glow { display: inline-flex; align-items: center; gap: .5rem; background: var(--cyan); color: var(--navy-deep); padding: .85rem 2rem; border-radius: 100px; font-family: var(--font-display); font-size: .82rem; font-weight: 700; text-decoration: none; letter-spacing: .04em; text-transform: uppercase; transition: box-shadow .3s, transform .2s; }
    .btn-glow:hover { box-shadow: 0 0 40px rgba(117,250,226,.4); transform: translateY(-2px); }

    /* FOOTER */
    footer {
      background: var(--navy-darker);
      border-top: 1px solid var(--border);
      padding: 4rem 0 2rem;
    }
    .footer-top {
      display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 3rem; padding-bottom: 3rem;
      border-bottom: 1px solid var(--border);
    }
    .footer-brand { display: flex; flex-direction: column; gap: 1rem; }
    .footer-brand img { height: 32px; width: auto; align-self: flex-start; }
    .footer-brand p { font-size: .85rem; color: var(--text-muted); line-height: 1.7; max-width: 280px; }
    .footer-social { display: flex; gap: 1.25rem; margin-top: 1.25rem; }
    .footer-social a {
      position: relative;
      width: 46px; height: 46px;
      display: inline-flex; align-items: center; justify-content: center;
      border-radius: 14px;
      color: #75fae2;
      background: rgba(117, 250, 226, .06);
      border: 1px solid rgba(117, 250, 226, .18);
      transition: transform .4s cubic-bezier(.16, 1, .3, 1), background .35s, box-shadow .4s, border-color .35s;
    }
    .footer-social a::before {
      content: '';
      position: absolute;
      inset: 0;
      border-radius: 14px;
      padding: 1px;
      background: linear-gradient(135deg, var(--cyan), var(--purple));
      -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
              mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
      -webkit-mask-composite: xor;
              mask-composite: exclude;
      opacity: 0;
      transition: opacity .35s ease;
      pointer-events: none;
    }
    .footer-social a svg { transition: transform .4s cubic-bezier(.16, 1, .3, 1); }
    .footer-social a:hover {
      background: rgba(117, 250, 226, .12);
      transform: translateY(-3px);
      box-shadow: 0 14px 32px -10px rgba(117, 250, 226, .45);
      border-color: transparent;
    }
    .footer-social a:hover::before { opacity: 1; }
    .footer-social a:hover svg { transform: scale(1.12); }
    .footer-col h4 {
      font-family: var(--font-display);
      font-size: .72rem; font-weight: 700;
      letter-spacing: .1em; text-transform: uppercase;
      color: var(--cyan); margin-bottom: 1rem;
    }
    .footer-col a {
      display: block; font-size: .84rem;
      color: var(--text-muted); text-decoration: none;
      margin-bottom: .6rem; transition: color .2s;
    }
    .footer-col a:hover { color: var(--cyan); }
    .footer-bottom {
      display: flex; justify-content: space-between; align-items: center;
      padding-top: 2rem; font-size: .72rem; color: var(--text-muted);
    }

    @media (max-width: 1024px) { .catalog-grid { grid-template-columns: 1fr 1fr; } .footer-top { grid-template-columns: 1fr 1fr; gap: 2rem; } }
    @media (max-width: 900px) {
      .modal-two-col { grid-template-columns: 1fr; }
      .modal-content { max-width: 95%; }
      .modal-scroll { padding: 1rem 1.5rem 2rem; }
    }
    @media (max-width: 768px) {
      nav { padding: .9rem 1.25rem; border-bottom-color: var(--border); }
      nav::before { opacity: 1; background: rgba(17,26,48,.96); backdrop-filter: none; -webkit-backdrop-filter: none; }
      .nav-links { display: flex; flex-direction: column; position: fixed; inset: 0; background: var(--navy-deep); justify-content: center; align-items: center; gap: 2rem; z-index: 9000; opacity: 0; visibility: hidden; pointer-events: none; transition: opacity .22s ease, visibility .22s ease; }
      .nav-links.open { opacity: 1; visibility: visible; pointer-events: auto; }
      .hamburger { display: block; z-index: 9001; }
      .nav-dropdown { display: contents; }
      .ndrop-chevron { display: none !important; }
      .nav-dropdown-menu { display: none !important; }
      .container { padding: 0 1.25rem; }
      .catalog-grid { grid-template-columns: 1fr; }
      .modal-overlay { padding: .5rem; }
      .install-grid { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); }
      .footer-top { grid-template-columns: 1fr; }
      .footer-bottom { flex-direction: column; gap: .5rem; text-align: center; }
    }