:root{
    --navy:#0B2247;
    --navy-deep:#071730;
    --steel:#54606B;
    --steel-light:#8A94A0;
    --orange:#EE7B1C;
    --orange-deep:#D2650B;
    --paper:#F3F4F2;
    --paper-warm:#EDEEEA;
    --ink:#12161C;
    --line:rgba(18,22,28,0.12);
    --line-light:rgba(255,255,255,0.16);
    --radius:2px;
  }
  *{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  @media (prefers-reduced-motion: reduce){
    html{scroll-behavior:auto;}
    *{animation-duration:0.01ms !important; animation-iteration-count:1 !important; transition-duration:0.01ms !important;}
  }
  body{
    margin:0;
    font-family:'Inter',sans-serif;
    color:var(--ink);
    background:var(--paper);
    -webkit-font-smoothing:antialiased;
  }
  h1,h2,h3,h4{
    font-family:'Barlow Condensed',sans-serif;
    font-weight:700;
    margin:0;
    letter-spacing:0.01em;
    color:var(--navy);
  }
  p{line-height:1.65; margin:0 0 1em; max-width:64ch;}
  a{color:inherit;}
  img{max-width:100%; display:block;}
  .wrap{max-width:1180px; margin:0 auto; padding:0 32px;}
  @media (max-width:640px){ .wrap{padding:0 20px;} }

  /* ---------- Nav ---------- */
  header.site-nav{
    position:sticky; top:0; z-index:100;
    background:rgba(243,244,242,0.92);
    backdrop-filter:blur(8px);
    border-bottom:1px solid var(--line);
  }
  .nav-inner{
    max-width:1180px; margin:0 auto; padding:8px 32px;
    display:flex; align-items:center; justify-content:space-between; gap:24px;
  }
  .nav-inner img{height:112px; width:auto;}
  nav.links{display:flex; gap:26px; flex-wrap:wrap;}
  nav.links a{
    font-size:14.5px; font-weight:600; text-decoration:none; color:var(--navy);
    position:relative; padding:4px 0;
  }
  nav.links a::after{
    content:''; position:absolute; left:0; bottom:0; width:0; height:2px; background:var(--orange);
    transition:width .25s ease;
  }
  nav.links a:hover::after{width:100%;}
  .nav-cta{
    background:var(--navy); color:#fff; padding:10px 18px; font-weight:600; font-size:13.5px;
    text-decoration:none; white-space:nowrap; border:1px solid var(--navy);
  }
  .nav-cta:hover{background:var(--orange); border-color:var(--orange);}
  #menu-toggle{display:none;}
  .burger{display:none; background:none; border:none; cursor:pointer; padding:6px;}
  .burger span{display:block; width:24px; height:2px; background:var(--navy); margin:5px 0;}
  @media (max-width:920px){
    nav.links{
      position:absolute; top:100%; left:0; right:0; background:var(--paper);
      flex-direction:column; gap:0; border-bottom:1px solid var(--line);
      max-height:0; overflow:hidden; transition:max-height .3s ease;
    }
    nav.links a{padding:14px 32px; border-top:1px solid var(--line); width:100%;}
    #menu-toggle:checked ~ nav.links{max-height:420px;}
    .burger{display:block;}
    .nav-cta{display:none;}
  }

  /* ---------- Hero ---------- */
  .hero{
    background:linear-gradient(180deg, var(--navy-deep) 0%, var(--navy) 100%);
    color:#fff;
    position:relative;
    overflow:hidden;
    padding:96px 0 84px;
  }
  .hero::before{
    content:'';
    position:absolute; inset:0;
    background-image:
      repeating-linear-gradient(115deg, rgba(255,255,255,0.035) 0 1px, transparent 1px 64px);
    pointer-events:none;
  }
  .hero-grid{
    position:relative; z-index:1;
    display:grid; grid-template-columns:1.15fr 0.85fr; gap:56px; align-items:center;
  }
  @media (max-width:900px){ .hero-grid{grid-template-columns:1fr;} }
  .eyebrow-line{
    display:flex; align-items:center; gap:10px; margin-bottom:22px;
    color:var(--orange); font-weight:600; font-size:14px;
  }
  .eyebrow-line .dash{width:28px; height:2px; background:var(--orange);}
  .hero h1{
    font-size:clamp(2.4rem, 5vw, 3.6rem);
    color:#fff; line-height:1.04; margin-bottom:22px;
  }
  .hero h1 em{
    font-style:normal; color:var(--orange);
  }
  .hero p.lead{
    color:#C6CEDA; font-size:1.1rem; max-width:46ch; margin-bottom:32px;
  }
  .hero-ctas{display:flex; gap:14px; flex-wrap:wrap; margin-bottom:40px;}
  .btn{
    display:inline-flex; align-items:center; gap:8px;
    padding:14px 26px; font-weight:600; font-size:15px; text-decoration:none;
    border:1px solid transparent; transition:transform .15s ease, background .2s ease, border-color .2s ease;
  }
  .btn-primary{background:var(--orange); color:#0B0F14;}
  .btn-primary:hover{background:var(--orange-deep); transform:translateY(-1px);}
  .btn-ghost{border-color:rgba(255,255,255,0.35); color:#fff;}
  .btn-ghost:hover{border-color:#fff; background:rgba(255,255,255,0.06);}
  .credentials-row{display:flex; gap:10px; flex-wrap:wrap;}
  .credential-chip{
    border:1px solid var(--line-light); color:#DCE2EA; font-size:12.5px; font-weight:600;
    padding:7px 12px; letter-spacing:0.02em;
  }

  /* welding spark visual */
  .spark-panel{
    position:relative; max-width:400px; margin:0 auto;
  }
  .hero-photo-frame{
    position:relative; border:1px solid var(--line-light); padding:10px;
  }
  .hero-photo-frame img{
    width:100%; height:420px; object-fit:cover; object-position:center 18%; display:block;
  }
  .hero-photo-frame::before{
    content:''; position:absolute; top:-10px; left:-10px; width:36px; height:36px;
    border-top:2px solid var(--orange); border-left:2px solid var(--orange);
  }
  .hero-photo-frame::after{
    content:''; position:absolute; bottom:-10px; right:-10px; width:36px; height:36px;
    border-bottom:2px solid var(--orange); border-right:2px solid var(--orange);
  }
  .spark-badge{
    position:absolute; left:-26px; bottom:36px; width:96px; height:96px; z-index:2;
  }
  .spark-panel svg{width:100%; height:100%;}
  .spark-line{stroke:var(--orange); stroke-width:2; fill:none;}
  .spark-bead{
    transform-origin:center;
    animation:travel 3.6s ease-in-out infinite;
  }
  @keyframes travel{
    0%{ offset-distance:0%; opacity:0;}
    8%{opacity:1;}
    92%{opacity:1;}
    100%{ offset-distance:100%; opacity:0;}
  }
  .flash{
    animation:flash 3.6s ease-in-out infinite;
    transform-origin:170px 210px;
  }
  @keyframes flash{
    0%,88%{opacity:0; transform:scale(0.6);}
    92%{opacity:1; transform:scale(1.15);}
    97%{opacity:.4; transform:scale(0.9);}
    100%{opacity:0; transform:scale(0.6);}
  }

  /* ---------- Section shell ---------- */
  section{padding:88px 0;}
  .section-head{max-width:640px; margin-bottom:48px;}
  .kicker{
    display:flex; align-items:center; gap:10px; color:var(--orange-deep);
    font-weight:700; font-size:13.5px; margin-bottom:14px;
  }
  .kicker .dash{width:24px; height:2px; background:var(--orange-deep);}
  .section-head h2{font-size:clamp(1.9rem,3.4vw,2.5rem); margin-bottom:16px;}
  .section-head p{color:var(--steel); font-size:1.02rem;}
  section.alt{background:var(--paper-warm); border-top:1px solid var(--line); border-bottom:1px solid var(--line);}
  section.dark{background:var(--navy-deep); color:#fff;}
  section.dark h2{color:#fff;}
  section.dark .section-head p{color:#B6C0CD;}

  /* ---------- About / timeline ---------- */
  .about-grid{display:grid; grid-template-columns:0.95fr 1.05fr; gap:64px; align-items:start;}
  @media (max-width:900px){.about-grid{grid-template-columns:1fr; gap:40px;}}
  .timeline{list-style:none; margin:0; padding:0; border-left:2px solid var(--line);}
  .timeline li{position:relative; padding:0 0 30px 28px;}
  .timeline li:last-child{padding-bottom:0;}
  .timeline li::before{
    content:''; position:absolute; left:-7px; top:2px; width:12px; height:12px;
    background:var(--paper); border:2px solid var(--orange); border-radius:50%;
  }
  .timeline .yr{font-family:'Barlow Condensed',sans-serif; font-weight:700; font-size:1.1rem; color:var(--navy);}
  .timeline .desc{color:var(--steel); font-size:0.96rem; margin-top:2px;}
  .about-photo{border:1px solid var(--line); margin-bottom:18px;}
  .about-photo img{width:100%; height:220px; object-fit:cover; display:block;}
  .badge-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:14px; margin-top:8px;}
  @media (max-width:500px){.badge-grid{grid-template-columns:1fr;}}
  .badge{
    border:1px solid var(--line); background:#fff; padding:18px 20px;
  }
  .badge .code{font-family:'Barlow Condensed',sans-serif; font-weight:700; color:var(--orange-deep); font-size:1.3rem; display:block;}
  .badge .label{font-size:13px; color:var(--steel); display:block; margin-top:2px;}

  /* ---------- Services tabs ---------- */
  .svc-shell{display:grid; grid-template-columns:300px 1fr; gap:0; border:1px solid var(--line); background:#fff;}
  @media (max-width:860px){.svc-shell{grid-template-columns:1fr;}}
  .svc-tabs{list-style:none; margin:0; padding:0; border-right:1px solid var(--line);}
  @media (max-width:860px){.svc-tabs{border-right:none; border-bottom:1px solid var(--line); display:flex; overflow-x:auto;}}
  .svc-tabs button{
    display:block; width:100%; text-align:left; background:none; border:none; cursor:pointer;
    font-family:'Inter',sans-serif; font-weight:600; font-size:15px; color:var(--steel);
    padding:18px 22px; border-bottom:1px solid var(--line); border-left:3px solid transparent;
    transition:background .15s ease, color .15s ease;
  }
  @media (max-width:860px){.svc-tabs button{white-space:nowrap; border-bottom:3px solid transparent; border-left:none;}}
  .svc-tabs button:hover{background:var(--paper-warm); color:var(--navy);}
  .svc-tabs button.active{color:var(--navy); background:var(--paper-warm); border-left-color:var(--orange);}
  @media (max-width:860px){.svc-tabs button.active{border-bottom-color:var(--orange);}}
  .svc-panels{padding:40px 44px;}
  @media (max-width:640px){.svc-panels{padding:30px 24px;}}
  .svc-panel{display:none;}
  .svc-panel.active{display:grid; grid-template-columns:1.15fr 0.85fr; gap:36px; align-items:start; animation:fadein .35s ease;}
  @media (max-width:760px){.svc-panel.active{grid-template-columns:1fr;}}
  @keyframes fadein{from{opacity:0; transform:translateY(6px);} to{opacity:1; transform:translateY(0);}}
  .svc-photo{border:1px solid var(--line); order:2;}
  .svc-photo img{width:100%; height:260px; object-fit:cover; display:block;}
  @media (max-width:760px){.svc-photo{order:-1;} .svc-photo img{height:200px;}}
  .svc-panel h3{font-size:1.7rem; margin-bottom:6px;}
  .svc-panel .ref{color:var(--orange-deep); font-weight:600; font-size:13.5px; margin-bottom:18px; display:block;}
  .svc-panel p{color:var(--ink); font-size:1rem;}
  .svc-panel ul{margin:18px 0 0; padding:0; list-style:none;}
  .svc-panel ul li{
    position:relative; padding-left:22px; margin-bottom:10px; color:var(--steel); font-size:0.97rem;
  }
  .svc-panel ul li::before{
    content:''; position:absolute; left:0; top:8px; width:8px; height:2px; background:var(--orange);
  }

  /* ---------- CND method switcher ---------- */
  .cnd-switch{display:flex; gap:0; border:1px solid var(--line-light); margin-bottom:0; max-width:520px;}
  .cnd-switch button{
    flex:1; background:none; border:none; color:#B6C0CD; font-family:'Inter'; font-weight:600;
    padding:14px 10px; cursor:pointer; font-size:14px; border-right:1px solid var(--line-light);
    transition:background .2s, color .2s;
  }
  .cnd-switch button:last-child{border-right:none;}
  .cnd-switch button.active, .cnd-switch button:hover{background:var(--orange); color:#0B0F14;}
  .cnd-body{
    display:grid; grid-template-columns:1fr 1fr; gap:40px; margin-top:36px; align-items:center;
  }
  @media (max-width:800px){.cnd-body{grid-template-columns:1fr;}}
  .cnd-panel{display:none;}
  .cnd-panel.active{display:grid; grid-template-columns:1fr 1fr; gap:40px; align-items:center;}
  @media (max-width:800px){.cnd-panel.active{grid-template-columns:1fr;}}
  .cnd-panel h3{color:#fff; font-size:1.9rem; margin-bottom:14px;}
  .cnd-panel .acr{color:var(--orange); font-weight:700; font-size:13.5px; letter-spacing:0.03em; margin-bottom:10px; display:block;}
  .cnd-panel p{color:#C6CEDA;}
  .cnd-visual{
    aspect-ratio:4/3; border:1px solid var(--line-light); overflow:hidden;
    background:rgba(255,255,255,0.03);
  }
  .cnd-visual img{width:100%; height:100%; object-fit:cover; display:block;}

  /* ---------- Zones ---------- */
  .zones-banner{border:1px solid var(--line); margin-bottom:28px; position:relative;}
  .zones-banner img{width:100%; height:300px; object-fit:cover; display:block;}
  .zones-banner figcaption{
    position:absolute; bottom:0; right:0; background:rgba(11,34,71,0.82); color:#DCE2EA;
    font-size:12px; padding:6px 12px; font-weight:600;
  }
  .zone-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:0; border:1px solid var(--line);}
  @media (max-width:800px){.zone-grid{grid-template-columns:1fr;}}
  .zone-card{padding:34px 30px; border-right:1px solid var(--line); background:#fff;}
  .zone-card:last-child{border-right:none;}
  @media (max-width:800px){.zone-card{border-right:none; border-bottom:1px solid var(--line);}}
  .zone-card .num{
    font-family:'Barlow Condensed',sans-serif; font-weight:700; color:var(--orange-deep); font-size:2.4rem; line-height:1;
  }
  .zone-card h4{font-size:1.35rem; margin:10px 0 10px;}
  .zone-card p{color:var(--steel); font-size:0.94rem;}
  .zone-tags{display:flex; flex-wrap:wrap; gap:8px; margin-top:14px;}
  .zone-tag{font-size:12px; font-weight:600; border:1px solid var(--line); padding:5px 10px; color:var(--steel);}

  /* ---------- Contact ---------- */
  .contact-grid{display:grid; grid-template-columns:1fr 1fr; gap:56px; align-items:start;}
  @media (max-width:860px){.contact-grid{grid-template-columns:1fr; gap:36px;}}
  .contact-card{border:1px solid var(--line-light); padding:32px; background:rgba(255,255,255,0.03);}
  .contact-line{display:flex; align-items:baseline; gap:12px; padding:14px 0; border-bottom:1px solid var(--line-light);}
  .contact-line:last-child{border-bottom:none;}
  .contact-line .lbl{font-size:12.5px; text-transform:uppercase; letter-spacing:0.06em; color:var(--orange); font-weight:700; width:96px; flex-shrink:0;}
  .contact-line a{color:#fff; text-decoration:none; font-weight:600; font-size:1.02rem;}
  .contact-line a:hover{color:var(--orange);}

  /* ---------- Footer ---------- */
  footer{background:var(--navy-deep); color:#8FA0B5; padding:36px 0; border-top:1px solid var(--line-light);}
  .footer-inner{display:flex; align-items:center; justify-content:space-between; gap:20px; flex-wrap:wrap;}
  .footer-inner img{height:84px; opacity:1;}
  .footer-logo{background:#F3F4F2; padding:8px 14px; display:inline-block; border:1px solid var(--line-light);}
  footer p{margin:0; font-size:13px; color:#728296;}