:root{
    --bg:#0A0E14;
    --panel:#12161F;
    --panel-edge:#1E2530;
    --amber:#FF8C2E;
    --steel:#4A7A9D;
    --text:#E8EAED;
    --muted:#8A93A3;
    --line:#242B38;
  }
  *{margin:0;padding:0;box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{
    background:var(--bg);
    color:var(--text);
    font-family:'IBM Plex Sans',sans-serif;
    line-height:1.6;
    -webkit-font-smoothing:antialiased;
  }
  h1,h2,h3{font-family:'Space Grotesk',sans-serif;font-weight:600;letter-spacing:-0.01em;}
  .mono{font-family:'IBM Plex Mono',monospace;}
  a{color:inherit;text-decoration:none;}
  .wrap{max-width:1180px;margin:0 auto;padding:0 32px;}

  /* background grid texture */
  body::before{
    content:"";
    position:fixed;inset:0;
    background-image:
      linear-gradient(rgba(255,255,255,0.018) 1px, transparent 1px),
      linear-gradient(90deg, rgba(255,255,255,0.018) 1px, transparent 1px);
    background-size:48px 48px;
    pointer-events:none;
    z-index:0;
  }

  /* HEADER */
  header{
    position:sticky;top:0;z-index:50;
    background:rgba(10,14,20,0.85);
    backdrop-filter:blur(10px);
    border-bottom:1px solid var(--line);
  }
  .nav{display:flex;align-items:center;justify-content:space-between;padding:20px 32px;}
  .logo{display:flex;align-items:center;gap:12px;font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:1.05rem;letter-spacing:0.02em;}
  .logo-mark{
    width:34px;height:34px;flex-shrink:0;
  }
  .nav-links{display:flex;gap:36px;font-size:0.92rem;color:var(--muted);}
  .nav-links a{transition:color .2s;}
  .nav-links a:hover{color:var(--amber);}
  .nav-cta{
    font-family:'IBM Plex Mono',monospace;
    font-size:0.82rem;
    border:1px solid var(--steel);
    color:var(--text);
    padding:9px 18px;
    border-radius:2px;
    transition:all .2s;
    white-space:nowrap;
  }
  .nav-cta:hover{border-color:var(--amber);color:var(--amber);}

  /* HERO */
  .hero{
    position:relative;
    padding:96px 0 120px;
    z-index:1;
  }
  .hero-grid{
    display:grid;
    grid-template-columns:1.1fr 1fr;
    gap:64px;
    align-items:center;
  }
  .eyebrow{
    font-family:'IBM Plex Mono',monospace;
    font-size:0.78rem;
    color:var(--amber);
    letter-spacing:0.18em;
    text-transform:uppercase;
    margin-bottom:20px;
    display:flex;align-items:center;gap:10px;
  }
  .eyebrow::before{
    content:"";
    display:block;width:24px;height:1px;background:var(--amber);
  }
  .hero h1{
    font-size:3.4rem;
    line-height:1.08;
    margin-bottom:24px;
  }
  .hero h1 .accent{color:var(--amber);}
  .hero p.lead{
    font-size:1.08rem;
    color:var(--muted);
    max-width:480px;
    margin-bottom:36px;
  }
  .hero-ctas{display:flex;gap:16px;flex-wrap:wrap;}
  .btn-primary{
    background:var(--amber);
    color:#0A0E14;
    font-family:'IBM Plex Mono',monospace;
    font-size:0.85rem;
    font-weight:500;
    padding:14px 26px;
    border-radius:2px;
    transition:all .2s;
    border:1px solid var(--amber);
  }
  .btn-primary:hover{background:transparent;color:var(--amber);}
  .btn-secondary{
    border:1px solid var(--line);
    color:var(--text);
    font-family:'IBM Plex Mono',monospace;
    font-size:0.85rem;
    padding:14px 26px;
    border-radius:2px;
    transition:all .2s;
  }
  .btn-secondary:hover{border-color:var(--steel);color:var(--steel);}

  /* SIGNATURE: traceability schematic */
  .schematic{
    position:relative;
    aspect-ratio:1/1;
    border:1px solid var(--line);
    border-radius:4px;
    background:var(--panel);
    padding:28px;
  }
  .schematic-label{
    font-family:'IBM Plex Mono',monospace;
    font-size:0.7rem;
    color:var(--muted);
    letter-spacing:0.1em;
    margin-bottom:18px;
    display:flex;justify-content:space-between;
  }
  .schematic-label .dot{color:var(--amber);}

  /* SECTIONS */
  section{position:relative;z-index:1;}
  .section{padding:100px 0;border-top:1px solid var(--line);}
  .section-head{
    display:flex;
    justify-content:space-between;
    align-items:flex-end;
    margin-bottom:56px;
    gap:32px;
    flex-wrap:wrap;
  }
  .section-head h2{font-size:2.1rem;}
  .section-tag{
    font-family:'IBM Plex Mono',monospace;
    font-size:0.78rem;
    color:var(--amber);
    letter-spacing:0.18em;
    text-transform:uppercase;
    margin-bottom:14px;
  }
  .section-head p{color:var(--muted);max-width:420px;font-size:0.96rem;}

  /* SERVICES */
  .services{
    display:grid;
    grid-template-columns:repeat(6,1fr);
    gap:1px;
    background:var(--line);
    border:1px solid var(--line);
    border-radius:4px;
    overflow:hidden;
  }
  .services .service{grid-column:span 2;}
  .services .service:nth-child(4),
  .services .service:nth-child(5){grid-column:span 3;}
  .service{
    background:var(--panel);
    padding:40px 36px;
    transition:background .25s;
  }
  .service:hover{background:#161B26;}
  .service .num{
    font-family:'IBM Plex Mono',monospace;
    font-size:0.78rem;
    color:var(--steel);
    margin-bottom:28px;
    display:block;
  }
  .service h3{font-size:1.25rem;margin-bottom:14px;}
  .service p{color:var(--muted);font-size:0.93rem;}
  .service ul{margin-top:18px;padding-left:0;list-style:none;}
  .service li{
    font-family:'IBM Plex Mono',monospace;
    font-size:0.78rem;
    color:var(--text);
    padding:7px 0;
    border-top:1px solid var(--line);
    display:flex;
    gap:10px;
  }
  .service li::before{content:"·";color:var(--amber);}

  /* STATS / EXPERIENCE */
  .stats{
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:32px;
  }
  .stat{border-left:1px solid var(--line);padding-left:24px;}
  .stat .figure{
    font-family:'Space Grotesk',sans-serif;
    font-size:2.6rem;
    font-weight:700;
    color:var(--text);
    line-height:1;
    margin-bottom:10px;
  }
  .stat .figure .accent{color:var(--amber);}
  .stat .label{
    font-family:'IBM Plex Mono',monospace;
    font-size:0.78rem;
    color:var(--muted);
    text-transform:uppercase;
    letter-spacing:0.08em;
  }

  /* INDUSTRIES */
  .industries{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:24px;
  }
  .industry{
    border:1px solid var(--line);
    border-radius:4px;
    padding:32px;
    position:relative;
    overflow:hidden;
    display:block;
    transition:border-color .2s, background .2s;
  }
  .industry:hover{border-color:var(--amber);background:#161B26;}
  .industry:hover h3{color:var(--amber);}
  .industry h3{transition:color .2s;}
  .industry::after{
    content:attr(data-code);
    position:absolute;
    top:24px;right:24px;
    font-family:'IBM Plex Mono',monospace;
    font-size:0.7rem;
    color:var(--line);
  }
  .industry h3{font-size:1.15rem;margin-bottom:12px;}
  .industry p{color:var(--muted);font-size:0.92rem;}

  /* APPROACH / PROCESS */
  .approach{
    border:1px solid var(--line);
    border-radius:4px;
    overflow:hidden;
  }
  .approach-row{
    display:grid;
    grid-template-columns:140px 1fr 2fr;
    gap:32px;
    padding:28px 36px;
    border-bottom:1px solid var(--line);
    align-items:center;
  }
  .approach-row:last-child{border-bottom:none;}
  .approach-row .stage-mono{
    font-family:'IBM Plex Mono',monospace;
    font-size:0.78rem;
    color:var(--steel);
  }
  .approach-row h4{font-size:1.05rem;font-weight:500;font-family:'Space Grotesk',sans-serif;}
  .approach-row p{color:var(--muted);font-size:0.9rem;}

  /* CONTACT */
  .contact-grid{
    display:grid;
    grid-template-columns:1.2fr 1fr;
    gap:64px;
    align-items:start;
  }
  .contact-grid h2{font-size:2.4rem;margin-bottom:20px;}
  .contact-grid p.lead{color:var(--muted);max-width:440px;}
  .contact-card{
    background:var(--panel);
    border:1px solid var(--line);
    border-radius:4px;
    padding:36px;
  }
  .contact-card .row{
    display:flex;justify-content:space-between;
    padding:16px 0;border-bottom:1px solid var(--line);
    font-size:0.92rem;
  }
  .contact-card .row:last-child{border-bottom:none;}
  .contact-card .row span:first-child{color:var(--muted);font-family:'IBM Plex Mono',monospace;font-size:0.78rem;text-transform:uppercase;letter-spacing:0.08em;}

  /* FOOTER */
  footer{
    border-top:1px solid var(--line);
    padding:36px 0;
  }
  .footer-row{
    display:flex;justify-content:space-between;align-items:center;
    font-size:0.82rem;color:var(--muted);
    flex-wrap:wrap;gap:16px;
  }
  .footer-row .logo{font-size:0.92rem;}

  /* RESPONSIVE */
  @media (max-width:900px){
    .hero-grid{grid-template-columns:1fr;}
    .hero h1{font-size:2.4rem;}
    .services{grid-template-columns:1fr;}
    .services .service{grid-column:span 1;}
    .stats{grid-template-columns:repeat(2,1fr);}
    .industries{grid-template-columns:1fr;}
    .approach-row{grid-template-columns:1fr;gap:8px;}
    .contact-grid{grid-template-columns:1fr;gap:40px;}
    .nav-links{display:none;}
    .schematic{aspect-ratio:auto;height:340px;}
  }

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

  @media (prefers-reduced-motion: reduce){
    *{transition:none !important;}
  }

/* ===== SUB-PAGE ADDITIONS ===== */

/* breadcrumb / page hero */
.page-hero{
  padding:64px 0 80px;
  border-bottom:1px solid var(--line);
}
.page-hero .crumb{
  font-family:'IBM Plex Mono',monospace;
  font-size:0.78rem;
  color:var(--muted);
  letter-spacing:0.08em;
  margin-bottom:24px;
}
.page-hero .crumb a{color:var(--steel);transition:color .2s;}
.page-hero .crumb a:hover{color:var(--amber);}
.page-hero h1{
  font-size:3rem;
  line-height:1.08;
  margin-bottom:20px;
  max-width:760px;
}
.page-hero h1 .accent{color:var(--amber);}
.page-hero p.lead{
  font-size:1.05rem;
  color:var(--muted);
  max-width:640px;
}

/* standards row */
.standards{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
  border-radius:4px;
  overflow:hidden;
  margin-top:56px;
}
.standard{
  background:var(--panel);
  padding:32px;
}
.standard .code{
  font-family:'IBM Plex Mono',monospace;
  font-size:1.3rem;
  color:var(--amber);
  display:block;
  margin-bottom:12px;
}
.standard h4{
  font-family:'Space Grotesk',sans-serif;
  font-size:1rem;
  font-weight:500;
  margin-bottom:10px;
}
.standard p{color:var(--muted);font-size:0.88rem;}

/* capability list (two column) */
.capabilities{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:48px;
}
.capabilities h3{
  font-size:1.15rem;
  margin-bottom:18px;
  padding-bottom:14px;
  border-bottom:1px solid var(--line);
}
.capabilities ul{list-style:none;}
.capabilities li{
  font-size:0.95rem;
  color:var(--muted);
  padding:11px 0;
  border-bottom:1px solid var(--line);
  display:flex;
  gap:12px;
}
.capabilities li::before{
  content:"";
  width:6px;height:6px;
  margin-top:8px;
  flex-shrink:0;
  background:var(--amber);
  border-radius:1px;
}
.capabilities li span{color:var(--text);}

/* domain tag row */
.domain-tags{
  display:flex;
  gap:12px;
  flex-wrap:wrap;
  margin-top:28px;
}
.domain-tags span{
  font-family:'IBM Plex Mono',monospace;
  font-size:0.76rem;
  color:var(--steel);
  border:1px solid var(--line);
  padding:8px 14px;
  border-radius:2px;
  letter-spacing:0.04em;
}

/* cross-link strip */
.cross-links{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:24px;
}
.cross-link{
  border:1px solid var(--line);
  border-radius:4px;
  padding:28px 32px;
  display:flex;
  justify-content:space-between;
  align-items:center;
  transition:border-color .2s, background .2s;
}
.cross-link:hover{border-color:var(--amber);background:#161B26;}
.cross-link .tag{
  font-family:'IBM Plex Mono',monospace;
  font-size:0.75rem;
  color:var(--muted);
  letter-spacing:0.12em;
  text-transform:uppercase;
  display:block;
  margin-bottom:6px;
}
.cross-link h4{font-size:1.1rem;font-weight:500;font-family:'Space Grotesk',sans-serif;}
.cross-link .arrow{color:var(--amber);font-family:'IBM Plex Mono',monospace;font-size:1.1rem;}

@media (max-width:900px){
  .page-hero h1{font-size:2.2rem;}
  .standards{grid-template-columns:1fr;}
  .capabilities{grid-template-columns:1fr;}
  .cross-links{grid-template-columns:1fr;}
}

/* ===== CONTACT FORM ===== */
.contact-form{display:flex;flex-direction:column;gap:16px;}
.contact-form .field{display:flex;flex-direction:column;gap:6px;}
.contact-form label{
  font-family:'IBM Plex Mono',monospace;
  font-size:0.72rem;
  color:var(--muted);
  text-transform:uppercase;
  letter-spacing:0.1em;
}
.contact-form input,
.contact-form select,
.contact-form textarea{
  background:#0D1118;
  border:1px solid var(--line);
  border-radius:2px;
  color:var(--text);
  font-family:'IBM Plex Sans',sans-serif;
  font-size:0.92rem;
  padding:11px 14px;
  transition:border-color .2s;
  outline:none;
  width:100%;
  -webkit-appearance:none;
  appearance:none;
}
.contact-form select{
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%238A93A3' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat;
  background-position:right 14px center;
  padding-right:36px;
  cursor:pointer;
}
.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus{border-color:var(--steel);}
.contact-form textarea{resize:vertical;min-height:120px;line-height:1.6;}
.contact-form input::placeholder,
.contact-form textarea::placeholder{color:var(--muted);opacity:0.6;}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.contact-form .submit-btn{
  background:var(--amber);
  color:#0A0E14;
  font-family:'IBM Plex Mono',monospace;
  font-size:0.85rem;
  font-weight:500;
  padding:14px 24px;
  border:1px solid var(--amber);
  border-radius:2px;
  cursor:pointer;
  transition:all .2s;
  text-align:center;
  margin-top:4px;
  display:block;
  width:100%;
}
.contact-form .submit-btn:hover{background:transparent;color:var(--amber);}
.form-note{
  font-family:'IBM Plex Mono',monospace;
  font-size:0.72rem;
  color:var(--muted);
  text-align:center;
  margin-top:4px;
}
@media (max-width:900px){
  .form-row{grid-template-columns:1fr;}
}

/* ===== FORM STATES ===== */
.contact-form button:disabled{
  opacity:0.5;
  cursor:not-allowed;
}
.form-feedback{
  border-radius:2px;
  padding:14px 16px;
  font-size:0.88rem;
  display:none;
  margin-top:4px;
}
.form-feedback.success{
  background:rgba(29,158,117,0.12);
  border:1px solid rgba(29,158,117,0.4);
  color:#4ecfa3;
}
.form-feedback.error{
  background:rgba(220,53,53,0.1);
  border:1px solid rgba(220,53,53,0.35);
  color:#f07070;
}
.form-feedback.visible{ display:block; }
.submit-btn .btn-text{ display:inline; }
.submit-btn .btn-spinner{ display:none; }
.submit-btn.loading .btn-text{ display:none; }
.submit-btn.loading .btn-spinner{ display:inline; }