:root{
    --paper:#EDEAE0;
    --paper-alt:#E3DFD0;
    --panel:#F6F4EC;
    --ink:#1C2321;
    --ink-soft:#57625B;
    --ink-faint:#8A9089;
    --line:#B9C0B4;
    --line-strong:#1C2321;
    --teal:#1F6F6B;
    --teal-dark:#154F4C;
    --rust:#B84B1E;
    --white:#FAF9F4;
  }
  *{box-sizing:border-box; margin:0; padding:0;}
  html{scroll-behavior:smooth;}
  body{
    background:var(--paper);
    color:var(--ink);
    font-family:'IBM Plex Sans', sans-serif;
    line-height:1.55;
    -webkit-font-smoothing:antialiased;
  }
  ::selection{background:var(--teal); color:var(--white);}
  a{color:inherit; text-decoration:none;}
  .mono{font-family:'IBM Plex Mono', monospace;}
  .wrap{max-width:1180px; margin:0 auto; padding:0 32px;}

  /* ---------- drawing-sheet frame (desktop only) ---------- */
  .frame-ticks{position:fixed; inset:0; pointer-events:none; z-index:5;}
  .frame-ticks span{
    position:absolute; font-family:'IBM Plex Mono', monospace; font-size:10px;
    letter-spacing:.08em; color:var(--ink-faint);
  }
  @media (min-width:900px){
    .frame-ticks{display:block;}
    .frame-ticks .top{top:10px;} .frame-ticks .bottom{bottom:10px;}
    .frame-ticks .left{left:10px; writing-mode:vertical-rl;}
    .frame-ticks .right{right:10px; writing-mode:vertical-rl;}
  }
  @media (max-width:899px){ .frame-ticks{display:none;} }

  /* ---------- nav / title strip ---------- */
  header.tb{
    border-bottom:1.5px solid var(--line-strong);
    padding:16px 0;
    position:sticky; top:0; background:var(--paper); z-index:20;
  }
  header.tb .inner{display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:10px;}
  .brand{display:flex; align-items:center; gap:16px;}
  .brand-logo{height:52px; width:auto; mix-blend-mode:multiply; flex:none;}
  .brand-sub{
    font-size:11px; letter-spacing:.06em; color:var(--ink-soft); border-left:1px solid var(--line);
    padding-left:16px; max-width:150px; line-height:1.4;
  }
  @media (max-width:640px){ .brand-sub{display:none;} }

  nav ul{list-style:none; display:flex; gap:26px; font-family:'IBM Plex Mono', monospace; font-size:12px; letter-spacing:.04em;}
  nav a{border-bottom:1px solid transparent; padding-bottom:3px; transition:border-color .15s;}
  nav a:hover{border-color:var(--teal); color:var(--teal-dark);}
  @media (max-width:640px){ nav{display:none;} }

  /* ---------- hero ---------- */
  .hero{padding:64px 0 40px; border-bottom:1.5px solid var(--line);}
  .hero .grid{display:grid; grid-template-columns:1.1fr .9fr; gap:48px; align-items:center;}
  @media (max-width:860px){ .hero .grid{grid-template-columns:1fr;} }

  .eyebrow{
    font-family:'IBM Plex Mono', monospace; font-size:12px; letter-spacing:.14em; text-transform:uppercase;
    color:var(--teal-dark); display:flex; align-items:center; gap:10px; margin-bottom:18px;
  }
  .eyebrow::before{content:""; width:26px; height:1px; background:var(--teal-dark);}

  h1{
    font-family:'IBM Plex Mono', monospace; font-weight:700; font-size:clamp(30px,4.4vw,50px);
    line-height:1.12; letter-spacing:-.01em; margin-bottom:20px;
  }
  h1 .accent{color:var(--teal);}
  .lede{font-size:17px; color:var(--ink-soft); max-width:46ch; margin-bottom:30px;}

  .cta-row{display:flex; gap:14px; flex-wrap:wrap;}
  .btn{
    font-family:'IBM Plex Mono', monospace; font-size:13px; letter-spacing:.03em;
    padding:13px 22px; border:1.5px solid var(--ink); display:inline-block; transition:all .15s;
  }
  .btn.primary{background:var(--ink); color:var(--white);}
  .btn.primary:hover{background:var(--teal-dark); border-color:var(--teal-dark);}
  .btn.ghost:hover{background:var(--ink); color:var(--white);}

  .tb-mini{
    margin-top:36px; border:1px solid var(--line); font-family:'IBM Plex Mono', monospace; font-size:11px;
    display:grid; grid-template-columns:repeat(4,1fr);
  }
  .tb-mini div{padding:9px 12px; border-right:1px solid var(--line);}
  .tb-mini div:last-child{border-right:none;}
  .tb-mini span{display:block; color:var(--ink-faint); font-size:9px; letter-spacing:.08em; margin-bottom:3px;}

  /* ---------- hero SVG panel ---------- */
  .hero-art{border:1.5px solid var(--line-strong); background:var(--panel); padding:14px; position:relative;}
  .hero-art .tag{
    position:absolute; top:-1px; left:-1px; background:var(--ink); color:var(--white);
    font-family:'IBM Plex Mono', monospace; font-size:10px; padding:4px 9px; letter-spacing:.05em;
  }
  .hero-art svg{width:100%; height:auto; display:block;}

  /* ---------- section shell ---------- */
  section{padding:74px 0; border-bottom:1.5px solid var(--line);}
  .sec-head{display:flex; justify-content:space-between; align-items:flex-end; gap:20px; margin-bottom:40px; flex-wrap:wrap;}
  .sec-num{font-family:'IBM Plex Mono', monospace; font-size:12px; color:var(--ink-faint); letter-spacing:.1em;}
  h2{font-family:'IBM Plex Mono', monospace; font-weight:700; font-size:clamp(22px,3vw,30px); margin-top:6px;}

  /* ---------- about + revision table ---------- */
  .about-grid{display:grid; grid-template-columns:.9fr 1.1fr; gap:56px;}
  @media (max-width:860px){ .about-grid{grid-template-columns:1fr;} }
  .about-grid p{color:var(--ink-soft); margin-bottom:16px; max-width:52ch;}
  .about-grid p strong{color:var(--ink); font-weight:600;}

  table.rev{width:100%; border-collapse:collapse; font-size:13px;}
  table.rev caption{
    text-align:left; font-family:'IBM Plex Mono', monospace; font-size:11px; letter-spacing:.08em;
    color:var(--ink-faint); margin-bottom:10px; text-transform:uppercase;
  }
  table.rev th, table.rev td{border:1px solid var(--line); padding:10px 12px; text-align:left; vertical-align:top;}
  table.rev th{
    font-family:'IBM Plex Mono', monospace; font-size:10.5px; letter-spacing:.06em; text-transform:uppercase;
    background:var(--paper-alt); color:var(--ink-soft); font-weight:600;
  }
  table.rev td.rev-id{font-family:'IBM Plex Mono', monospace; color:var(--teal-dark); font-weight:600;}
  table.rev td.muted{color:var(--ink-faint); font-family:'IBM Plex Mono', monospace; font-size:12px;}

  /* ---------- services (instrument bubbles) ---------- */
  .svc-grid{display:grid; grid-template-columns:repeat(4,1fr); gap:1.5px; background:var(--line);}
  @media (max-width:900px){ .svc-grid{grid-template-columns:repeat(2,1fr);} }
  @media (max-width:520px){ .svc-grid{grid-template-columns:1fr;} }
  .svc-card{background:var(--panel); padding:30px 24px; display:flex; flex-direction:column; gap:16px;}
  .bubble{
    width:56px; height:56px; border-radius:50%; border:1.5px solid var(--ink); position:relative;
    display:flex; align-items:center; justify-content:center; flex:none;
  }
  .bubble::after{content:""; position:absolute; left:8px; right:8px; top:50%; height:1px; background:var(--ink);}
  .bubble .fn{position:absolute; top:9px; font-family:'IBM Plex Mono',monospace; font-weight:700; font-size:12px;}
  .bubble .loop{position:absolute; bottom:7px; font-family:'IBM Plex Mono',monospace; font-size:10px; color:var(--ink-soft);}
  .svc-card h3{font-family:'IBM Plex Mono', monospace; font-size:15px; font-weight:600;}
  .svc-card p{font-size:13.5px; color:var(--ink-soft);}

  /* ---------- industries / line-legend tags ---------- */
  .legend-row{display:flex; flex-wrap:wrap; gap:14px;}
  .legend-tag{
    display:flex; align-items:center; gap:10px; border:1px solid var(--line); padding:10px 16px;
    font-family:'IBM Plex Mono', monospace; font-size:12.5px; background:var(--panel);
  }
  .legend-tag .swatch{width:28px; height:0; border-top-width:2px; border-top-style:solid;}
  .sw-solid{border-top-color:var(--ink);}
  .sw-dash{border-top-color:var(--teal-dark); border-top-style:dashed;}
  .sw-dot{border-top-color:var(--rust); border-top-style:dotted;}
  .sw-dashdot{border-top-color:var(--ink-soft); border-image: repeating-linear-gradient(90deg, var(--ink-soft) 0 6px, transparent 6px 9px, var(--ink-soft) 9px 11px, transparent 11px 14px) 1;}

  /* ---------- contact ---------- */
  .contact-grid{display:grid; grid-template-columns:1.1fr .9fr; gap:56px;}
  @media (max-width:860px){ .contact-grid{grid-template-columns:1fr;} }
  .field{margin-bottom:18px;}
  .field label{
    display:block; font-family:'IBM Plex Mono', monospace; font-size:10.5px; letter-spacing:.08em;
    text-transform:uppercase; color:var(--ink-faint); margin-bottom:6px;
  }
  .field input, .field textarea{
    width:100%; border:1px solid var(--line-strong); background:var(--panel); padding:11px 12px;
    font-family:'IBM Plex Sans', sans-serif; font-size:14px; color:var(--ink);
  }
  .field textarea{min-height:110px; resize:vertical;}
  .field input:focus, .field textarea:focus{outline:2px solid var(--teal); outline-offset:1px;}

  .info-panel{border:1.5px solid var(--line-strong); background:var(--panel); padding:26px;}
  .info-panel h3{font-family:'IBM Plex Mono', monospace; font-size:13px; letter-spacing:.06em; margin-bottom:16px; text-transform:uppercase;}
  .info-panel .row{display:flex; justify-content:space-between; padding:10px 0; border-top:1px solid var(--line); font-size:13.5px;}
  .info-panel .row:first-of-type{border-top:none;}
  .info-panel .row span:first-child{color:var(--ink-faint); font-family:'IBM Plex Mono', monospace; font-size:11px;}

  /* ---------- footer ---------- */
  footer{padding:30px 0;}
  footer .inner{display:flex; justify-content:space-between; flex-wrap:wrap; gap:12px; font-family:'IBM Plex Mono', monospace; font-size:11px; color:var(--ink-faint);}

  .note{
    font-family:'IBM Plex Mono', monospace; font-size:11px; color:var(--rust); background:#F3E4D8;
    border:1px dashed var(--rust); padding:10px 14px; margin-bottom:34px; max-width:680px;
  }
  
  /* Reset native button styling so <button class="btn"> matches <a class="btn"> */
button.btn{appearance:none; -webkit-appearance:none; background-image:none; cursor:pointer; font:inherit; font-family:'IBM Plex Mono', monospace;}

/* Inline status banner for the contact form */
.form-status{
  font-family:'IBM Plex Mono', monospace; font-size:13px; padding:12px 16px; margin-bottom:20px;
  border:1px dashed var(--line-strong);
}
.form-status.success{border-color:var(--teal-dark); color:var(--teal-dark); background:#E7F0EE;}
.form-status.error{border-color:var(--rust); color:var(--rust); background:#F3E4D8;}