:root{
    --ink:#1B222C;
    --steel:#455363;
    --steel-light:#7E8B99;
    --panel:#EEF0F2;
    --panel-2:#E2E5E8;
    --amber:#8A6C3F;
    --oxide:#5C4A42;
    --white:#FFFFFF;
    --line:rgba(27,34,44,0.14);
    --display:'Oswald', sans-serif;
    --body:'IBM Plex Sans', sans-serif;
    --mono:'IBM Plex Mono', monospace;
  }
  *{box-sizing:border-box; margin:0; padding:0;}
  html{scroll-behavior:smooth;}
  body{
    font-family:var(--body);
    color:var(--ink);
    background:var(--panel);
    line-height:1.55;
    -webkit-font-smoothing:antialiased;
  }
  a{color:inherit; text-decoration:none;}
  img,svg{display:block; max-width:100%;}
  .wrap{max-width:1180px; margin:0 auto; padding:0 28px;}

  /* ---------- Registration / crop-mark signature ---------- */
  .reg{position:absolute; width:14px; height:14px; pointer-events:none;}
  .reg::before, .reg::after{content:""; position:absolute; background:var(--ink); opacity:.35;}
  .reg::before{width:14px; height:1px; top:6px; left:0;}
  .reg::after{width:1px; height:14px; left:6px; top:0;}
  .reg.tl{top:10px; left:10px;} .reg.tr{top:10px; right:10px;}
  .reg.bl{bottom:10px; left:10px;} .reg.br{bottom:10px; right:10px;}

  .hazard-rule{
    height:4px;
    background:var(--steel);
  }

  /* ---------- Header ---------- */
  header{
    position:sticky; top:0; z-index:50;
    background:var(--ink);
    color:var(--white);
    border-bottom:3px solid var(--amber);
  }
  .nav{
    display:flex; align-items:center; justify-content:space-between;
    padding:16px 28px;
    max-width:1180px; margin:0 auto;
  }
  .brand{
    font-family:var(--display); font-weight:700; font-size:1.35rem;
    letter-spacing:0.02em; text-transform:uppercase; color:var(--white);
    display:flex; align-items:center; gap:10px;
  }
  .brand .tag{
    font-family:var(--mono); font-size:.65rem; color:var(--amber);
    border:1px solid var(--amber); padding:2px 6px; letter-spacing:.08em;
  }
  nav ul{list-style:none; display:flex; gap:28px;}
  nav ul li a{
    font-family:var(--mono); font-size:.8rem; text-transform:uppercase;
    letter-spacing:.06em; color:var(--panel); opacity:.85;
    padding-bottom:4px; border-bottom:2px solid transparent;
    transition:opacity .15s, border-color .15s;
  }
  nav ul li a:hover{opacity:1; border-color:var(--amber);}
  nav ul li a.active{opacity:1; border-color:var(--amber);}
  .nav-cta{
    font-family:var(--mono); font-size:.75rem; text-transform:uppercase;
    background:var(--amber); color:var(--ink); padding:9px 16px;
    letter-spacing:.05em; font-weight:600;
  }
  .menu-btn{display:none; background:none; border:none; color:var(--white); font-size:1.5rem;}

  /* ---------- Hero ---------- */
  .hero{
    position:relative; overflow:hidden;
    background:var(--ink); color:var(--white);
    padding:88px 0 70px;
  }
  .hero .wrap{
    display:grid; grid-template-columns:1.1fr 0.9fr; gap:50px; align-items:center;
    position:relative; z-index:2;
  }
  .eyebrow{
    font-family:var(--mono); font-size:.78rem; letter-spacing:.12em;
    color:var(--amber); text-transform:uppercase; margin-bottom:18px;
    display:flex; align-items:center; gap:10px;
  }
  .eyebrow::before{content:""; width:26px; height:2px; background:var(--amber); display:inline-block;}
  h1{
    font-family:var(--display); font-weight:700; text-transform:uppercase;
    font-size:clamp(2.3rem, 4.6vw, 3.6rem); line-height:1.04; letter-spacing:.01em;
    margin-bottom:22px;
  }
  h1 span{color:var(--amber);}
  .hero p.lead{
    font-size:1.08rem; color:var(--panel); max-width:46ch; margin-bottom:32px;
    opacity:.92;
  }
  .btn-row{display:flex; gap:14px; flex-wrap:wrap;}
  .btn{
    display:inline-block; font-family:var(--mono); font-size:.82rem;
    text-transform:uppercase; letter-spacing:.05em; font-weight:500;
    padding:14px 26px; border:2px solid transparent; transition:transform .15s, background .15s;
  }
  .btn-primary{background:var(--amber); color:var(--ink);}
  .btn-primary:hover{background:#ffbb2e;}
  .btn-outline{border-color:rgba(255,255,255,.4); color:var(--white);}
  .btn-outline:hover{border-color:var(--amber); color:var(--amber);}

  .hero-diagram{position:relative;}
  .hero-diagram svg{width:100%; height:auto;}

  /* ---------- Stat strip ---------- */
  .stats{
    background:var(--steel); color:var(--white);
    border-top:1px solid rgba(255,255,255,.1);
  }
  .stats .wrap{
    display:grid; grid-template-columns:repeat(2,1fr);
    max-width:520px;
    padding:26px 28px;
  }
  .stat{text-align:center; border-left:1px solid rgba(255,255,255,.18); padding:6px 12px;}
  .stat:first-child{border-left:none;}
  .stat .num{font-family:var(--display); font-size:2rem; font-weight:600; color:var(--amber);}
  .stat .label{font-family:var(--mono); font-size:.72rem; text-transform:uppercase; letter-spacing:.06em; opacity:.85; margin-top:4px;}

  /* ---------- Section shell ---------- */
  section{padding:88px 0;}
  .section-head{
    display:flex; justify-content:space-between; align-items:flex-end;
    gap:24px; margin-bottom:48px; border-bottom:1px solid var(--line); padding-bottom:22px;
  }
  .section-code{
    font-family:var(--mono); font-size:.78rem; letter-spacing:.1em; color:var(--oxide);
    text-transform:uppercase; margin-bottom:10px; display:block;
  }
  h2{
    font-family:var(--display); text-transform:uppercase; font-weight:600;
    font-size:clamp(1.6rem, 3vw, 2.3rem); letter-spacing:.01em;
  }
  .section-note{
    font-family:var(--mono); font-size:.82rem; color:var(--steel); max-width:32ch; text-align:right;
  }

  /* ---------- About ---------- */
  .about-grid{display:grid; grid-template-columns:0.9fr 1.1fr; gap:56px; align-items:start;}
  .about-grid p{margin-bottom:16px; color:var(--ink); max-width:58ch;}
  .about-figures{
    background:var(--white); border:1px solid var(--line); padding:30px;
    position:relative;
  }
  .about-figures h3{
    font-family:var(--mono); font-size:.78rem; text-transform:uppercase; letter-spacing:.08em;
    color:var(--steel); margin-bottom:18px; padding-bottom:10px; border-bottom:1px solid var(--line);
  }
  .about-figures ul{list-style:none;}
  .about-figures li{
    display:flex; justify-content:space-between; font-family:var(--mono); font-size:.85rem;
    padding:10px 0; border-bottom:1px dashed var(--line);
  }
  .about-figures li:last-child{border-bottom:none;}
  .about-figures li b{color:var(--oxide);}

  /* ---------- Products ---------- */
  .cat-grid{
    display:grid; grid-template-columns:repeat(4, 1fr); gap:1px;
    background:var(--line); border:1px solid var(--line);
  }
  .cat{
    background:var(--white); padding:28px 24px; position:relative;
    min-height:200px; display:flex; flex-direction:column; gap:14px;
    transition:background .15s;
  }
  .cat:hover{background:#fbf9f4;}
  .cat .code{font-family:var(--mono); font-size:.72rem; color:var(--steel-light); letter-spacing:.06em;}
  .cat .icon{width:36px; height:36px; color:var(--oxide);}
  .cat h3{font-family:var(--display); font-size:1.05rem; text-transform:uppercase; font-weight:600; letter-spacing:.01em;}
  .cat p{font-size:.88rem; color:var(--steel);}

  /* ---------- Why us ---------- */
  .why-wrap{display:grid; grid-template-columns:repeat(3,1fr); gap:0; border:1px solid var(--line);}
  .why-item{padding:32px 28px; border-left:1px solid var(--line);}
  .why-item:first-child{border-left:none;}
  .why-item .n{font-family:var(--mono); color:var(--amber); background:var(--ink); display:inline-block; padding:3px 9px; font-size:.75rem; margin-bottom:16px;}
  .why-item h3{font-family:var(--display); text-transform:uppercase; font-size:1.15rem; margin-bottom:10px;}
  .why-item p{color:var(--steel); font-size:.92rem;}

  /* ---------- Contact ---------- */
  #contact{background:var(--ink); color:var(--white);}
  #contact .section-code{color:var(--amber);}
  #contact h2{color:var(--white);}
  #contact .section-note{color:var(--steel-light);}
  #contact .section-head{border-color:rgba(255,255,255,.15);}
  .contact-grid{display:grid; grid-template-columns:0.9fr 1.1fr; gap:56px;}
  .contact-info p{color:var(--panel); margin-bottom:22px; max-width:42ch;}
  .info-line{
    display:flex; gap:14px; align-items:flex-start; margin-bottom:20px;
    font-family:var(--mono); font-size:.9rem;
  }
  .info-line .k{color:var(--amber); text-transform:uppercase; font-size:.72rem; letter-spacing:.08em; width:90px; flex-shrink:0; padding-top:3px;}
  .info-line a{border-bottom:1px solid rgba(255,255,255,.3);}
  .info-line a:hover{border-color:var(--amber); color:var(--amber);}

  form{background:var(--white); color:var(--ink); padding:36px; border-top:4px solid var(--amber);}
  .field{margin-bottom:20px;}
  .field label{
    display:block; font-family:var(--mono); font-size:.72rem; text-transform:uppercase;
    letter-spacing:.07em; color:var(--steel); margin-bottom:8px;
  }
  .field input, .field textarea{
    width:100%; padding:12px 14px; border:1px solid var(--line); background:var(--panel);
    font-family:var(--body); font-size:.95rem; color:var(--ink);
  }
  .field input:focus, .field textarea:focus{
    outline:2px solid var(--oxide); outline-offset:1px; background:var(--white);
  }
  .field textarea{resize:vertical; min-height:110px;}
  .row-2{display:grid; grid-template-columns:1fr 1fr; gap:16px;}
  .submit-row{display:flex; align-items:center; gap:18px; flex-wrap:wrap; margin-top:8px;}
  .submit-btn{
    font-family:var(--mono); font-size:.85rem; text-transform:uppercase; letter-spacing:.05em;
    background:var(--oxide); color:var(--white); border:none; padding:14px 30px; cursor:pointer;
    transition:background .15s;
  }
  .submit-btn:hover{background:#c2482f;}
  .alt-contact{font-family:var(--mono); font-size:.78rem; color:var(--steel);}
  .alt-contact a{border-bottom:1px solid var(--line);}
  .form-note{font-family:var(--mono); font-size:.72rem; color:var(--steel-light); margin-top:16px;}

  /* ---------- Footer ---------- */
  footer{background:var(--ink); color:var(--panel); border-top:1px solid rgba(255,255,255,.1);}
  .foot-wrap{
    display:flex; justify-content:space-between; align-items:center;
    padding:26px 28px; font-family:var(--mono); font-size:.75rem;
    color:var(--steel-light); flex-wrap:wrap; gap:10px;
  }
  .foot-wrap .brand{font-size:1rem;}

  @media (max-width:920px){
    nav ul{display:none;}
    .menu-btn{display:block;}
    .hero .wrap{grid-template-columns:1fr;}
    .hero-diagram{order:-1;}
    .about-grid, .contact-grid{grid-template-columns:1fr;}
    .cat-grid{grid-template-columns:repeat(2,1fr);}
    .why-wrap{grid-template-columns:1fr;}
    .why-item{border-left:none; border-top:1px solid var(--line);}
    .why-item:first-child{border-top:none;}
    .stats .wrap{grid-template-columns:repeat(2,1fr); row-gap:20px;}
    .stat:nth-child(3){border-left:none;}
    .row-2{grid-template-columns:1fr;}
  }
  @media (prefers-reduced-motion: reduce){
    html{scroll-behavior:auto;}
    *{transition:none !important;}
  }