:root{
    --ink:#0A1214;
    --ink-2:#0D1719;
    --panel:#111C1F;
    --panel-2:#0F191C;
    --line:#22333A;
    --line-soft:#1A2A2F;
    --paper:#EDE6D6;
    --cyan:#5FC9BE;
    --cyan-dim:#3C8B84;
    --amber:#E2A23B;
    --text:#E7EDEE;
    --text-muted:#8FA3A8;
    --text-faint:#5B6C71;
    --radius:2px;
  }
  *{box-sizing:border-box; margin:0; padding:0;}
  html{scroll-behavior:smooth;}
  body{
    background:var(--ink);
    color:var(--text);
    font-family:'Source Serif 4', serif;
    line-height:1.6;
    overflow-x:hidden;
  }
  ::selection{ background:var(--cyan); color:var(--ink); }

  .mono{ font-family:'IBM Plex Mono', monospace; }
  .display{ font-family:'Space Grotesk', sans-serif; }

  a{ color:inherit; text-decoration:none; }

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

  /* Background grid texture */
  .grid-bg{
    position:fixed; inset:0; z-index:0; pointer-events:none;
    background-image:
      linear-gradient(var(--line-soft) 1px, transparent 1px),
      linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
    background-size: 64px 64px;
    opacity:0.35;
    mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, black 40%, transparent 90%);
  }

  /* ---------- NAV ---------- */
  header{
    position:fixed; top:0; left:0; right:0; z-index:50;
    background:rgba(10,18,20,0.86);
    backdrop-filter:blur(10px);
    border-bottom:1px solid var(--line-soft);
  }
  .navbar{
    display:flex; align-items:center; justify-content:space-between;
    padding:16px 32px;
    max-width:1180px; margin:0 auto;
  }
  .brand{
    display:flex; align-items:center; gap:10px;
    font-family:'Space Grotesk', sans-serif; font-weight:700; letter-spacing:0.02em;
    font-size:16px;
  }
  .brand .mark{
    width:11px; height:11px; border:1.5px solid var(--cyan);
    transform:rotate(45deg); flex-shrink:0;
  }
  .brand small{
    display:block; font-family:'IBM Plex Mono', monospace; font-weight:400;
    font-size:9.5px; letter-spacing:0.14em; color:var(--text-faint); margin-top:2px;
  }
  nav ul{
    list-style:none; display:flex; gap:30px;
    font-family:'IBM Plex Mono', monospace; font-size:12px; letter-spacing:0.06em;
    text-transform:uppercase;
  }
  nav a{ color:var(--text-muted); transition:color .2s; position:relative; padding:4px 0; }
  nav a:hover{ color:var(--cyan); }
  .nav-toggle{ display:none; }

  @media (max-width:780px){
    nav ul{ display:none; }
  }

  /* ---------- HERO ---------- */
  .hero{
    position:relative; z-index:1;
    padding:180px 0 110px;
    border-bottom:1px solid var(--line-soft);
  }
  .redact{
    position:absolute; right:32px; top:100px;
    display:none;
  }
  @media(min-width:900px){ .redact{ display:block; } }
  .redact .bar{ height:10px; background:var(--line-soft); margin-bottom:8px; }

  .classify-strip{
    display:flex; align-items:center; gap:14px;
    font-family:'IBM Plex Mono', monospace; font-size:11px; letter-spacing:0.16em;
    color:var(--amber); text-transform:uppercase; margin-bottom:28px;
  }
  .classify-strip::before{
    content:''; width:8px; height:8px; background:var(--amber); flex-shrink:0;
  }
  .classify-strip .divider{ flex:1; height:1px; background:var(--line); }

  .hero h1{
    font-family:'Space Grotesk', sans-serif; font-weight:700;
    font-size:clamp(46px, 8vw, 92px); line-height:0.98; letter-spacing:-0.02em;
    max-width:900px;
  }
  .hero h1 .accent{ color:var(--cyan); }

  .hero-sub{
    margin-top:26px; max-width:600px; font-size:18px; color:var(--text-muted);
    font-family:'Source Serif 4', serif;
  }
  .domain-tags{
    display:flex; flex-wrap:wrap; gap:10px; margin-top:30px;
  }
  .domain-tag{
    font-family:'IBM Plex Mono', monospace; font-size:11px; letter-spacing:0.05em;
    padding:7px 12px; border:1px solid var(--line); color:var(--text-muted);
    text-transform:uppercase;
  }

  .hero-cta{ display:flex; gap:16px; margin-top:44px; flex-wrap:wrap; }
  .btn{
    font-family:'IBM Plex Mono', monospace; font-size:12.5px; letter-spacing:0.06em;
    text-transform:uppercase; padding:14px 24px; border:1px solid var(--cyan);
    color:var(--ink); background:var(--cyan); cursor:pointer;
    transition:all .2s; display:inline-flex; align-items:center; gap:8px;
  }
  .btn:hover{ background:transparent; color:var(--cyan); }
  .btn-ghost{
    background:transparent; color:var(--text); border:1px solid var(--line);
  }
  .btn-ghost:hover{ border-color:var(--cyan); color:var(--cyan); }

  /* ---------- SECTION SHELL ---------- */
  section{ position:relative; z-index:1; padding:100px 0; border-bottom:1px solid var(--line-soft); }
  .sec-head{
    display:flex; justify-content:space-between; align-items:flex-end; gap:24px;
    margin-bottom:56px; flex-wrap:wrap;
  }
  .sec-eyebrow{
    font-family:'IBM Plex Mono', monospace; font-size:11.5px; letter-spacing:0.18em;
    color:var(--cyan); text-transform:uppercase; margin-bottom:14px; display:flex; align-items:center; gap:10px;
  }
  .sec-eyebrow::before{ content:'//'; color:var(--text-faint); }
  .sec-head h2{
    font-family:'Space Grotesk', sans-serif; font-weight:600; font-size:clamp(30px,4vw,44px);
    letter-spacing:-0.01em;
  }
  .sec-desc{ max-width:420px; color:var(--text-muted); font-size:15.5px; }

  /* ---------- DOMAINS ---------- */
  .domain-grid{
    display:grid; grid-template-columns:repeat(auto-fit, minmax(215px,1fr)); gap:1px;
    background:var(--line-soft); border:1px solid var(--line-soft);
  }
  .domain-card{
    background:var(--panel); padding:32px 26px; transition:background .25s;
  }
  .domain-card:hover{ background:var(--panel-2); }
  .domain-card .idx{
    font-family:'IBM Plex Mono', monospace; font-size:11px; color:var(--text-faint);
    letter-spacing:0.1em; margin-bottom:22px;
  }
  .domain-card h3{
    font-family:'Space Grotesk', sans-serif; font-size:19px; font-weight:600; margin-bottom:12px;
  }
  .domain-card p{ font-size:14px; color:var(--text-muted); line-height:1.65; }

  /* ---------- PROJECTS ---------- */
  .case-grid{ display:grid; grid-template-columns:repeat(auto-fit, minmax(320px,1fr)); gap:20px; }
  .case-card{
    background:var(--panel); border:1px solid var(--line); padding:26px;
    cursor:pointer; transition:border-color .2s, transform .2s;
    display:flex; flex-direction:column; gap:16px; position:relative;
  }
  .case-card:hover{ border-color:var(--cyan-dim); transform:translateY(-2px); }
  .case-top{ display:flex; justify-content:space-between; align-items:flex-start; gap:12px; }
  .case-no{ font-family:'IBM Plex Mono', monospace; font-size:11px; color:var(--text-faint); letter-spacing:0.08em; }
  .stamp{
    font-family:'IBM Plex Mono', monospace; font-size:10px; letter-spacing:0.1em;
    padding:4px 9px; border:1px solid currentColor; transform:rotate(-3deg);
    text-transform:uppercase; white-space:nowrap;
  }
  .stamp.done{ color:var(--cyan); }
  .stamp.active{ color:var(--amber); }
  .stamp.proto{ color:#B892E8; }
  .case-card h3{ font-family:'Space Grotesk', sans-serif; font-size:20px; font-weight:600; }
  .case-tag{ font-family:'IBM Plex Mono', monospace; font-size:10.5px; color:var(--text-faint); text-transform:uppercase; letter-spacing:0.08em; }
  .case-summary{ font-size:14.5px; color:var(--text-muted); flex:1; }
  .case-open{
    font-family:'IBM Plex Mono', monospace; font-size:11.5px; color:var(--cyan);
    display:flex; align-items:center; gap:6px; letter-spacing:0.05em;
  }
  .case-open .arrow{ transition:transform .2s; }
  .case-card:hover .arrow{ transform:translateX(4px); }

  /* ---------- PAPERS ---------- */
  .paper-list{ display:flex; flex-direction:column; }
  .paper-row{
    display:grid; grid-template-columns:90px 1fr auto; gap:24px; align-items:start;
    padding:26px 0; border-top:1px solid var(--line-soft);
  }
  .paper-list .paper-row:last-child{ border-bottom:1px solid var(--line-soft); }
  .paper-ref{ font-family:'IBM Plex Mono', monospace; font-size:11px; color:var(--text-faint); padding-top:4px; }
  .paper-body h3{ font-family:'Space Grotesk', sans-serif; font-size:19px; font-weight:600; margin-bottom:8px; }
  .paper-abstract{ color:var(--text-muted); font-size:14.5px; max-width:640px; }
  .paper-meta{ display:flex; gap:8px; margin-top:12px; flex-wrap:wrap; }
  .paper-meta span{
    font-family:'IBM Plex Mono', monospace; font-size:10px; color:var(--cyan-dim);
    border:1px solid var(--line); padding:3px 8px; text-transform:uppercase; letter-spacing:0.05em;
  }
  .paper-link{
    font-family:'IBM Plex Mono', monospace; font-size:12px; color:var(--cyan);
    white-space:nowrap; padding-top:4px;
  }
  @media(max-width:640px){
    .paper-row{ grid-template-columns:1fr; gap:10px; }
  }

  /* ---------- IDEAS ---------- */
  .idea-grid{ display:grid; grid-template-columns:repeat(auto-fit, minmax(270px,1fr)); gap:20px; }
  .idea-card{
    border:1px dashed var(--line); padding:28px; background:var(--panel-2);
    display:flex; flex-direction:column; gap:14px;
  }
  .idea-status{
    font-family:'IBM Plex Mono', monospace; font-size:10px; letter-spacing:0.1em;
    color:var(--amber); text-transform:uppercase; display:flex; align-items:center; gap:8px;
  }
  .idea-status::before{ content:''; width:6px; height:6px; border-radius:50%; background:var(--amber); }
  .idea-card h3{ font-family:'Space Grotesk', sans-serif; font-size:18px; font-weight:600; }
  .idea-card p{ font-size:14px; color:var(--text-muted); flex:1; }
  .idea-card .pitch{
    font-family:'IBM Plex Mono', monospace; font-size:11.5px; color:var(--cyan);
  }

  /* ---------- CONTACT ---------- */
  .contact-shell{
    display:grid; grid-template-columns:1fr 1fr; gap:60px;
  }
  @media(max-width:820px){ .contact-shell{ grid-template-columns:1fr; } }
  .transmit-lines{ display:flex; flex-direction:column; gap:18px; margin-top:30px; }
  .transmit-line{ display:flex; justify-content:space-between; border-bottom:1px solid var(--line-soft); padding-bottom:14px; }
  .transmit-line .k{ font-family:'IBM Plex Mono', monospace; font-size:11px; color:var(--text-faint); text-transform:uppercase; letter-spacing:0.1em; }
  .transmit-line .v{ font-family:'IBM Plex Mono', monospace; font-size:13.5px; color:var(--cyan); }

  form{ display:flex; flex-direction:column; gap:16px; }
  .field label{
    display:block; font-family:'IBM Plex Mono', monospace; font-size:10.5px;
    letter-spacing:0.1em; text-transform:uppercase; color:var(--text-faint); margin-bottom:8px;
  }
  .field input, .field textarea{
    width:100%; background:var(--panel); border:1px solid var(--line); color:var(--text);
    padding:13px 14px; font-family:'Source Serif 4', serif; font-size:14.5px;
    resize:vertical;
  }
  .field input:focus, .field textarea:focus{ outline:none; border-color:var(--cyan); }

  footer{
    position:relative; z-index:1; padding:36px 0; text-align:center;
    font-family:'IBM Plex Mono', monospace; font-size:11px; color:var(--text-faint);
    letter-spacing:0.05em;
  }

  /* ---------- MODAL (case file detail) ---------- */
  .overlay{
    position:fixed; inset:0; background:rgba(6,10,11,0.82); backdrop-filter:blur(4px);
    z-index:100; display:none; align-items:flex-start; justify-content:center;
    padding:70px 20px; overflow-y:auto;
  }
  .overlay.open{ display:flex; }
  .modal{
    background:var(--panel); border:1px solid var(--line); max-width:640px; width:100%;
    padding:40px; position:relative;
  }
  .modal-close{
    position:absolute; top:20px; right:20px; background:none; border:1px solid var(--line);
    color:var(--text-muted); width:32px; height:32px; cursor:pointer; font-family:'IBM Plex Mono', monospace;
  }
  .modal-close:hover{ border-color:var(--cyan); color:var(--cyan); }
  .modal .case-no{ margin-bottom:18px; }
  .modal h3{ font-family:'Space Grotesk', sans-serif; font-size:28px; font-weight:700; margin-bottom:16px; }
  .modal-body{ color:var(--text-muted); font-size:15px; margin-bottom:22px; }
  .modal-specs{ display:flex; flex-wrap:wrap; gap:10px; margin-bottom:26px; }
  .modal-specs span{
    font-family:'IBM Plex Mono', monospace; font-size:10.5px; border:1px solid var(--line);
    padding:5px 10px; color:var(--cyan-dim); text-transform:uppercase;
  }

  /* section-specific left padding fix for content offset */
  #hero-inner{ position:relative; }