:root{
    --graphite:#16181A;
    --mill-white:#F4F4F1;
    --blueprint:#3D5A80;
    --blueprint-light:#6B8CB8;
    --aluminum:#C4C9CC;
    --safety-yellow:#E8B923;
    --line:#2A2D30;
  }
  *{margin:0;padding:0;box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{
    background:var(--mill-white);
    color:var(--graphite);
    font-family:'Inter',sans-serif;
    line-height:1.5;
    -webkit-font-smoothing:antialiased;
  }
  a{color:inherit;text-decoration:none;}
  .mono{font-family:'IBM Plex Mono',monospace;}
  .display{font-family:'Archivo Expanded',sans-serif;font-weight:800;text-transform:uppercase;letter-spacing:0.01em;}

  /* focus visibility */
  a:focus-visible, button:focus-visible{outline:2px solid var(--blueprint);outline-offset:3px;}

  @media (prefers-reduced-motion: reduce){
    *{animation-duration:0.01ms !important; animation-iteration-count:1 !important; transition-duration:0.01ms !important; scroll-behavior:auto !important;}
  }

  .wrap{max-width:1180px;margin:0 auto;padding:0 32px;}

  /* ===== HEADER ===== */
  header{
    position:sticky;top:0;z-index:50;
    background:var(--graphite);
    border-bottom:1px solid var(--line);
  }
  .nav{
    display:flex;align-items:center;justify-content:space-between;
    padding:18px 32px;max-width:1180px;margin:0 auto;
  }
  .logo{
    color:var(--mill-white);
    font-family:'Archivo Expanded',sans-serif;
    font-weight:800;
    font-size:1.05rem;
    letter-spacing:0.03em;
    text-transform:uppercase;
    display:flex;align-items:baseline;gap:8px;
  }
  .logo .tag{
    font-family:'IBM Plex Mono',monospace;
    font-weight:400;font-size:0.62rem;
    color:var(--safety-yellow);
    letter-spacing:0.12em;
    border:1px solid var(--safety-yellow);
    padding:2px 6px;
    text-transform:uppercase;
  }
  nav ul{display:flex;gap:34px;list-style:none;}
  nav ul li a{
    color:var(--aluminum);font-size:0.86rem;font-weight:500;
    letter-spacing:0.02em;
    transition:color .15s ease;
  }
  nav ul li a:hover{color:var(--mill-white);}
  .nav-cta{
    background:var(--safety-yellow);
    color:var(--graphite);
    font-family:'IBM Plex Mono',monospace;
    font-weight:500;font-size:0.78rem;
    padding:9px 16px;
    letter-spacing:0.03em;
    border:1px solid var(--safety-yellow);
    transition:background .15s ease, color .15s ease;
  }
  .nav-cta:hover{background:transparent;color:var(--safety-yellow);}
  .nav-toggle{display:none;}

  /* ===== HERO — technical drawing ===== */
  .hero{
    background:var(--graphite);
    color:var(--mill-white);
    position:relative;
    padding:88px 0 110px;
    overflow:hidden;
    border-bottom:1px solid var(--line);
  }
  .hero-inner{position:relative;z-index:2;}
  .hero-eyebrow{
    font-family:'IBM Plex Mono',monospace;
    color:var(--safety-yellow);
    font-size:0.78rem;
    letter-spacing:0.14em;
    text-transform:uppercase;
    margin-bottom:22px;
    display:flex;align-items:center;gap:10px;
  }
  .hero-eyebrow::before{content:"";width:22px;height:1px;background:var(--safety-yellow);}
  .hero h1{
    font-size:clamp(2.4rem, 5.4vw, 4.4rem);
    line-height:1.03;
    max-width:820px;
    margin-bottom:26px;
  }
  .hero h1 em{
    color:var(--blueprint-light);
    font-style:normal;
  }
  .hero p.lede{
    max-width:560px;
    color:var(--aluminum);
    font-size:1.08rem;
    margin-bottom:40px;
  }
  .hero-actions{display:flex;gap:16px;flex-wrap:wrap;}
  .btn-primary{
    background:var(--safety-yellow);
    color:var(--graphite);
    padding:15px 26px;
    font-weight:600;font-size:0.92rem;
    display:inline-block;
    transition:transform .15s ease, box-shadow .15s ease;
  }
  .btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 0 0 rgba(0,0,0,0.25);}
  .btn-secondary{
    border:1px solid var(--aluminum);
    color:var(--mill-white);
    padding:15px 26px;
    font-weight:500;font-size:0.92rem;
    display:inline-block;
    transition:border-color .15s ease, color .15s ease;
  }
  .btn-secondary:hover{border-color:var(--mill-white);}

  /* Dimension-line callout diagram */
  .dim-diagram{
    position:relative;
    margin-top:80px;
    padding-top:60px;
  }
  .dim-row{
    display:grid;
    grid-template-columns:repeat(5, 1fr);
    gap:0;
  }
  .dim-item{
    position:relative;
    padding:0 18px 0 0;
    border-left:1px solid var(--line);
    padding-left:18px;
  }
  .dim-item:first-child{border-left:none;padding-left:0;}
  .dim-item .dim-mark{
    font-family:'IBM Plex Mono',monospace;
    font-size:0.7rem;
    color:var(--blueprint-light);
    margin-bottom:10px;
    display:block;
  }
  .dim-item h3{
    font-size:0.95rem;
    font-weight:600;
    margin-bottom:6px;
    color:var(--mill-white);
  }
  .dim-item p{
    font-family:'IBM Plex Mono',monospace;
    font-size:0.74rem;
    color:var(--aluminum);
    line-height:1.6;
  }

  /* ===== SECTION LABELS ===== */
  .section{padding:96px 0;}
  .section-head{
    display:flex;justify-content:space-between;align-items:flex-end;
    margin-bottom:52px;
    border-bottom:1px solid #dcdcd6;
    padding-bottom:22px;
    flex-wrap:wrap;gap:16px;
  }
  .section-eyebrow{
    font-family:'IBM Plex Mono',monospace;
    font-size:0.76rem;
    color:var(--blueprint);
    letter-spacing:0.1em;
    text-transform:uppercase;
    margin-bottom:10px;
  }
  .section-head h2{
    font-family:'Archivo Expanded',sans-serif;
    font-weight:800;
    text-transform:uppercase;
    font-size:clamp(1.7rem, 3vw, 2.4rem);
  }
  .section-note{
    font-family:'IBM Plex Mono',monospace;
    font-size:0.78rem;
    color:#6b6f73;
    max-width:280px;
    text-align:right;
  }

  /* ===== CAPABILITIES — spec sheet grid ===== */
  .spec-grid{
    display:grid;
    grid-template-columns:repeat(3, 1fr);
    border-top:1px solid #dcdcd6;
    border-left:1px solid #dcdcd6;
  }
  .spec-grid.cols-4{
    grid-template-columns:repeat(4, 1fr);
  }
  .spec-card{
    border-right:1px solid #dcdcd6;
    border-bottom:1px solid #dcdcd6;
    padding:30px 26px;
    transition:background .15s ease;
  }
  .spec-card:hover{background:#eceae2;}
  .spec-photo{
    position:relative;
    aspect-ratio:4/3;
    background:#ffffff;
    border:1px solid #dcdcd6;
    margin-bottom:18px;
    display:flex;align-items:center;justify-content:center;
    overflow:hidden;
  }
  .spec-photo img{
    width:100%;height:100%;
    object-fit:contain;
    padding:10px;
  }
  .spec-photo .spec-photo-fallback{
    display:none;
    align-items:center;justify-content:center;
    width:100%;height:100%;
    background:repeating-linear-gradient(45deg, #e4e2d8, #e4e2d8 10px, #ddd9cb 10px, #ddd9cb 20px);
  }
  .spec-photo .spec-photo-fallback span{
    font-family:'IBM Plex Mono',monospace;
    font-size:0.65rem;
    color:#8a8f77;
    background:var(--mill-white);
    padding:3px 8px;
  }
  .spec-photo-credit{
    position:absolute;bottom:4px;right:6px;
    font-family:'IBM Plex Mono',monospace;
    font-size:0.6rem;
    color:#b8bcc0;
    letter-spacing:0.03em;
  }
  .spec-card .spec-id{
    font-family:'IBM Plex Mono',monospace;
    font-size:0.72rem;
    color:var(--blueprint);
    margin-bottom:14px;
  }
  .spec-card h3{
    font-size:1.05rem;font-weight:700;margin-bottom:10px;
  }
  .spec-card .spec-line{
    font-family:'IBM Plex Mono',monospace;
    font-size:0.78rem;
    color:#54585c;
    line-height:1.7;
  }
  .spec-card .spec-line b{color:var(--graphite);font-weight:500;}

  /* ===== PROCESS — quote steps (legitimately sequential) ===== */
  .process{
    background:var(--graphite);
    color:var(--mill-white);
  }
  .process .section-head{border-bottom-color:var(--line);}
  .process .section-eyebrow{color:var(--safety-yellow);}
  .process .section-note{color:var(--aluminum);}
  .steps{
    display:grid;
    grid-template-columns:repeat(4, 1fr);
    gap:0;
    counter-reset:step;
  }
  .step{
    position:relative;
    padding:0 24px 0 0;
    border-left:1px solid var(--line);
    padding-left:24px;
  }
  .step:first-child{border-left:none;padding-left:0;}
  .step .step-num{
    font-family:'IBM Plex Mono',monospace;
    font-size:0.72rem;
    color:var(--blueprint-light);
    margin-bottom:18px;
  }
  .step h3{font-size:1.02rem;margin-bottom:10px;}
  .step p{font-size:0.86rem;color:var(--aluminum);}

  /* ===== PRODUCTS ===== */
  .product-grid{
    display:grid;
    grid-template-columns:repeat(3, 1fr);
    gap:2px;
    background:#dcdcd6;
    border:1px solid #dcdcd6;
  }
  .product-card{background:var(--mill-white);padding:26px;}
  .product-thumb{
    aspect-ratio:4/3;
    background:
      repeating-linear-gradient(45deg, #e4e2d8, #e4e2d8 10px, #ddd9cb 10px, #ddd9cb 20px);
    border:1px solid #dcdcd6;
    margin-bottom:18px;
    display:flex;align-items:center;justify-content:center;
  }
  .product-thumb span{
    font-family:'IBM Plex Mono',monospace;
    font-size:0.68rem;
    color:#8a8f77;
    background:var(--mill-white);
    padding:3px 8px;
  }
  .product-card h3{font-size:1rem;font-weight:700;margin-bottom:6px;}
  .product-card .price{
    font-family:'IBM Plex Mono',monospace;
    color:var(--blueprint);
    font-size:0.9rem;
    margin-bottom:14px;
  }
  .product-card a{
    font-size:0.82rem;font-weight:600;
    color:var(--graphite);
    border-bottom:1px solid var(--graphite);
    padding-bottom:2px;
  }

  /* ===== CTA BAND ===== */
  .cta-band{
    background:var(--blueprint);
    color:var(--mill-white);
    padding:64px 0;
    text-align:center;
  }
  .cta-band h2{
    font-family:'Archivo Expanded',sans-serif;
    font-weight:800;text-transform:uppercase;
    font-size:clamp(1.5rem,3vw,2.1rem);
    margin-bottom:18px;
  }
  .cta-band p{color:#dbe4f0;margin-bottom:30px;max-width:480px;margin-left:auto;margin-right:auto;}
  .cta-band .btn-primary{color:var(--graphite);}

  /* ===== FOOTER ===== */
  footer{
    background:var(--graphite);
    color:var(--aluminum);
    padding:56px 0 28px;
    font-size:0.86rem;
  }
  .footer-grid{
    display:grid;
    grid-template-columns:2fr 1fr 1fr 1fr;
    gap:40px;
    padding-bottom:40px;
    border-bottom:1px solid var(--line);
    margin-bottom:24px;
  }
  footer h4{
    color:var(--mill-white);
    font-size:0.78rem;
    letter-spacing:0.08em;
    text-transform:uppercase;
    margin-bottom:16px;
    font-family:'IBM Plex Mono',monospace;
  }
  footer ul{list-style:none;}
  footer ul li{margin-bottom:10px;}
  footer ul li a:hover{color:var(--mill-white);}
  .footer-bottom{
    display:flex;justify-content:space-between;
    font-family:'IBM Plex Mono',monospace;
    font-size:0.72rem;
    color:#6b6f73;
    flex-wrap:wrap;gap:10px;
  }


  /* ===== PRODUCTS PAGE ===== */
  .page-banner{
    background:var(--graphite);
    color:var(--mill-white);
    padding:56px 0 44px;
    position:relative;
    overflow:hidden;
    border-bottom:1px solid var(--line);
  }
  .breadcrumb{
    position:relative;z-index:2;
    font-family:'IBM Plex Mono',monospace;
    font-size:0.74rem;
    color:var(--aluminum);
    margin-bottom:18px;
  }
  .breadcrumb a{color:var(--aluminum);}
  .breadcrumb a:hover{color:var(--mill-white);}
  .breadcrumb span{color:var(--safety-yellow);margin:0 6px;}
  .page-banner h1{
    position:relative;z-index:2;
    font-family:'Archivo Expanded',sans-serif;
    font-weight:800;text-transform:uppercase;
    font-size:clamp(1.9rem, 4vw, 3rem);
    margin-bottom:14px;
  }
  .page-banner p{
    position:relative;z-index:2;
    color:var(--aluminum);
    max-width:520px;
    font-size:1rem;
  }

  .filter-bar{
    display:flex;align-items:center;justify-content:space-between;
    flex-wrap:wrap;gap:16px;
    padding:22px 0;
    border-bottom:1px solid #dcdcd6;
    margin-bottom:36px;
  }
  .filter-tabs{display:flex;flex-wrap:wrap;gap:8px;}
  .filter-tab{
    font-family:'IBM Plex Mono',monospace;
    font-size:0.78rem;
    padding:8px 14px;
    border:1px solid #dcdcd6;
    color:#54585c;
    background:var(--mill-white);
    cursor:pointer;
    transition:background .15s ease, border-color .15s ease, color .15s ease;
  }
  .filter-tab:hover{border-color:var(--blueprint);color:var(--blueprint);}
  .filter-tab.active{
    background:var(--graphite);
    border-color:var(--graphite);
    color:var(--mill-white);
  }
  .sort-select{
    font-family:'IBM Plex Mono',monospace;
    font-size:0.78rem;
    color:#54585c;
    border:1px solid #dcdcd6;
    background:var(--mill-white);
    padding:8px 12px;
  }
  .result-count{
    font-family:'IBM Plex Mono',monospace;
    font-size:0.76rem;
    color:#8a8f94;
    margin-bottom:24px;
  }

  .product-grid-full{
    display:grid;
    grid-template-columns:repeat(3, 1fr);
    gap:2px;
    background:#dcdcd6;
    border:1px solid #dcdcd6;
  }
  .product-grid-full .product-card{
    background:var(--mill-white);
    padding:24px;
    position:relative;
  }
  .product-grid-full .product-card .category-tag{
    font-family:'IBM Plex Mono',monospace;
    font-size:0.66rem;
    color:var(--blueprint);
    letter-spacing:0.06em;
    text-transform:uppercase;
    margin-bottom:10px;
  }
  .stock-badge{
    position:absolute;top:16px;right:16px;
    font-family:'IBM Plex Mono',monospace;
    font-size:0.62rem;
    padding:3px 8px;
    background:var(--mill-white);
    border:1px solid #dcdcd6;
    color:#54585c;
    z-index:2;
  }
  .stock-badge.low{color:var(--safety-yellow);border-color:var(--safety-yellow);}

  .pagination{
    display:flex;justify-content:center;align-items:center;gap:10px;
    margin-top:48px;
  }
  .pagination a, .pagination span{
    font-family:'IBM Plex Mono',monospace;
    font-size:0.82rem;
    width:36px;height:36px;
    display:flex;align-items:center;justify-content:center;
    border:1px solid #dcdcd6;
    color:#54585c;
  }
  .pagination a:hover{border-color:var(--blueprint);color:var(--blueprint);}
  .pagination .current{
    background:var(--graphite);
    border-color:var(--graphite);
    color:var(--mill-white);
  }

  /* ===== QUOTE FORM ===== */
  .quote-field{
    margin-bottom:24px;
  }
  .quote-field-row{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:20px;
  }
  .quote-field label{
    display:block;
    font-family:'IBM Plex Mono',monospace;
    font-size:0.78rem;
    text-transform:uppercase;
    letter-spacing:0.06em;
    color:var(--graphite);
    margin-bottom:8px;
  }
  .quote-input{
    width:100%;
    font-family:'Inter',sans-serif;
    font-size:0.95rem;
    padding:12px 14px;
    border:1px solid #c4c9cc;
    background:var(--mill-white);
    color:var(--graphite);
  }
  .quote-input:focus{
    outline:none;
    border-color:var(--blueprint);
  }
  textarea.quote-input{
    resize:vertical;
  }
  .quote-field-hint{
    font-family:'IBM Plex Mono',monospace;
    font-size:0.72rem;
    color:#8a8f94;
    margin-top:6px;
  }
  .quote-field-error{
    display:block;
    font-family:'IBM Plex Mono',monospace;
    font-size:0.76rem;
    color:#c0392b;
    margin-top:6px;
  }
  .quote-form-summary ul{
    list-style:none;
    padding:14px 16px;
    border:1px solid #c0392b;
    background:#fdecea;
    color:#c0392b;
    font-size:0.85rem;
    margin-bottom:24px;
  }
  .quote-form-summary:empty{
    display:none;
  }

  /* ===== RESPONSIVE ===== */
  @media (max-width: 860px){
    nav ul{display:none;}
    .dim-row, .steps{grid-template-columns:repeat(2,1fr);}
    .dim-item, .step{border-left:none;padding-left:0;border-top:1px solid var(--line);padding-top:20px;margin-top:20px;}
    .dim-row .dim-item:nth-child(1), .steps .step:nth-child(1){border-top:none;margin-top:0;padding-top:0;}
    .spec-grid, .spec-grid.cols-4, .product-grid, .product-grid-full{grid-template-columns:1fr 1fr;}
    .footer-grid{grid-template-columns:1fr 1fr;}
    .section-head{align-items:flex-start;}
    .section-note{text-align:left;}
    .quote-field-row{grid-template-columns:1fr;}
  }
  @media (max-width: 560px){
    .spec-grid, .spec-grid.cols-4, .product-grid, .product-grid-full, .dim-row, .steps{grid-template-columns:1fr;}
    .footer-grid{grid-template-columns:1fr;}
    .hero{padding:64px 0 70px;}
    .section{padding:64px 0;}
  }