:root{
    --navy:#0a0f1a;
    --navy-2:#0d1420;
    --graphite:#141b26;
    --graphite-2:#19212d;
    --offwhite:#f3f1ea;
    --offwhite-2:#ebe8df;
    --steel-dark:#2b3542;
    --steel-light:#d7d3c7;
    --text-hi:#eae8e1;
    --text-lo:#9aa3b0;
    --text-dark:#171b22;
    --text-dark-lo:#5a5f6b;
    --accent:#5fd9c6;
    --accent-dim:#3a8f81;
    --radius:2px;
    --maxw:1180px;
  }
  *{box-sizing:border-box;margin:0;padding:0;}
  html{scroll-behavior:smooth;}
  body{
    font-family:'Inter',-apple-system,sans-serif;
    background:var(--offwhite);
    color:var(--text-dark);
    -webkit-font-smoothing:antialiased;
    line-height:1.5;
  }
  .mono{font-family:'JetBrains Mono',monospace;}
  a{color:inherit;text-decoration:none;}
  ul{list-style:none;}
  img,svg{display:block;max-width:100%;}
  .wrap{max-width:var(--maxw);margin:0 auto;padding:0 32px;}
  section{position:relative;}
  ::selection{background:var(--accent);color:var(--navy);}

  /* ---------- Eyebrow / labels ---------- */
  .eyebrow{
    font-family:'JetBrains Mono',monospace;
    font-size:11px;
    letter-spacing:0.14em;
    text-transform:uppercase;
    color:var(--accent-dim);
    display:flex;
    align-items:center;
    gap:10px;
    margin-bottom:18px;
  }
  .eyebrow::before{
    content:'';
    width:7px;height:7px;
    background:var(--accent);
    display:inline-block;
    border-radius:1px;
  }
  section.on-dark .eyebrow{color:var(--accent);}

  h1,h2,h3{
    font-weight:700;
    letter-spacing:-0.02em;
    line-height:1.08;
  }
  h2{font-size:clamp(28px,3.4vw,42px);}
  h3{font-size:18px;}
  .section-head{max-width:680px;margin-bottom:48px;}
  .section-head p{color:var(--text-dark-lo);font-size:16px;margin-top:16px;max-width:600px;}
  section.on-dark .section-head p{color:var(--text-lo);}

  /* ---------- Nav ---------- */
  header{
    position:sticky;top:0;z-index:100;
    background:rgba(10,15,26,0.92);
    backdrop-filter:blur(8px);
    border-bottom:1px solid var(--steel-dark);
  }
  nav{
    max-width:var(--maxw);margin:0 auto;padding:0 32px;
    display:flex;align-items:center;justify-content:space-between;
    height:64px;
  }
  .logo{
    font-family:'JetBrains Mono',monospace;
    font-weight:700;font-size:15px;letter-spacing:0.02em;
    color:var(--text-hi);
    display:flex;align-items:center;gap:10px;
  }
  .logo .dot{width:8px;height:8px;background:var(--accent);border-radius:1px;}
  .nav-links{display:flex;gap:32px;align-items:center;}
  .nav-links a{
    font-size:13px;color:var(--text-lo);
    transition:color .15s ease;
  }
  .nav-links a:hover{color:var(--text-hi);}
  .btn{
    font-family:'JetBrains Mono',monospace;
    font-size:12.5px;letter-spacing:0.02em;
    padding:10px 18px;
    border-radius:var(--radius);
    border:1px solid transparent;
    cursor:pointer;
    display:inline-flex;align-items:center;gap:8px;
    transition:all .15s ease;
    white-space:nowrap;
  }
  .btn-primary{background:var(--accent);color:var(--navy);font-weight:600;}
  .btn-primary:hover{background:#7ee6d5;}
  .btn-ghost{border-color:var(--steel-dark);color:var(--text-hi);}
  .btn-ghost:hover{border-color:var(--accent);color:var(--accent);}
  .btn-ghost-dark{border-color:var(--steel-light);color:var(--text-dark);}
  .btn-ghost-dark:hover{border-color:var(--text-dark);}

  /* ---------- Hero ---------- */
  .hero{
    background:
      radial-gradient(ellipse 900px 500px at 80% -10%, rgba(95,217,198,0.09), transparent 60%),
      var(--navy);
    color:var(--text-hi);
    padding:110px 0 90px;
    overflow:hidden;
    border-bottom:1px solid var(--steel-dark);
  }
  .hero .wrap{position:relative;z-index:2;}
  .hero-tag{
    font-family:'JetBrains Mono',monospace;
    font-size:11.5px;color:var(--accent);
    letter-spacing:0.12em;text-transform:uppercase;
    border:1px solid var(--steel-dark);
    display:inline-block;padding:6px 12px;border-radius:2px;
    margin-bottom:28px;
  }
  .hero h1{
    font-size:clamp(36px,5.6vw,64px);
    max-width:900px;
    color:#fff;
  }
  .hero .accent-word{color:var(--accent);}
  .hero-sub{
    margin-top:26px;
    font-size:18px;
    color:var(--text-lo);
    max-width:620px;
    line-height:1.6;
  }
  .hero-ctas{display:flex;gap:16px;margin-top:38px;flex-wrap:wrap;}
  .trust-strip{
    margin-top:64px;
    padding-top:24px;
    border-top:1px solid var(--steel-dark);
    display:flex;flex-wrap:wrap;gap:10px 28px;
    font-family:'JetBrains Mono',monospace;
    font-size:12px;color:var(--text-lo);
    letter-spacing:0.02em;
  }
  .trust-strip span{display:flex;align-items:center;gap:8px;}
  .trust-strip span::before{content:'';width:4px;height:4px;background:var(--accent-dim);}

  /* faint background grid lines for terminal feel */
  .hero::after{
    content:'';
    position:absolute;inset:0;
    background-image:
      linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
      linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
    background-size:64px 64px;
    mask-image:linear-gradient(to bottom, transparent, rgba(0,0,0,0.6) 30%, transparent 90%);
    pointer-events:none;
    z-index:1;
  }

  /* ---------- Section paddings & alt backgrounds ---------- */
  .sec{padding:96px 0;}
  .on-dark{background:var(--navy);color:var(--text-hi);}
  .on-graphite{background:var(--graphite);color:var(--text-hi);}
  .on-light{background:var(--offwhite);color:var(--text-dark);}
  .on-light-2{background:var(--offwhite-2);color:var(--text-dark);}
  .on-dark h2, .on-graphite h2{color:#fff;}

  /* ---------- Problem section ---------- */
  .problem-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;}
  .problem-copy p{color:var(--text-dark-lo);font-size:16px;margin-bottom:20px;line-height:1.7;}
  .query-list{
    border:1px solid var(--steel-light);
    background:#fff;
    border-radius:var(--radius);
  }
  .query-list li{
    padding:16px 20px;
    font-family:'JetBrains Mono',monospace;
    font-size:13.5px;
    color:var(--text-dark);
    border-bottom:1px solid var(--steel-light);
    display:flex;gap:12px;
  }
  .query-list li:last-child{border-bottom:none;}
  .query-list li::before{content:'>';color:var(--accent-dim);font-weight:700;}
  .mini-label{
    font-family:'JetBrains Mono',monospace;
    font-size:11px;letter-spacing:0.1em;text-transform:uppercase;
    color:var(--accent-dim);
    margin:28px 0 12px;
  }
  .problem-callout{
    margin-top:24px;
    font-size:15px;
    font-weight:600;
    color:var(--text-dark);
  }
  section.on-dark .problem-callout, section.on-graphite .problem-callout{color:var(--text-hi);}

  /* ---------- Solution + graph (signature element) ---------- */
  .solution-copy{max-width:640px;margin-bottom:16px;}
  .solution-copy p{color:var(--text-lo);font-size:16px;margin-bottom:18px;line-height:1.7;}
  .model-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;margin-bottom:64px;}
  .model-tags span{
    font-family:'JetBrains Mono',monospace;
    font-size:12px;color:var(--text-lo);
    border:1px solid var(--steel-dark);
    padding:7px 12px;border-radius:2px;
  }
  .graph-panel{
    border:1px solid var(--steel-dark);
    background:var(--navy-2);
    border-radius:var(--radius);
    padding:8px;
  }
  .graph-panel .panel-bar{
    display:flex;align-items:center;justify-content:space-between;
    padding:10px 14px;
    font-family:'JetBrains Mono',monospace;
    font-size:11px;color:var(--text-lo);
    letter-spacing:0.06em;
  }
  .panel-bar .dots{display:flex;gap:6px;}
  .panel-bar .dots i{width:8px;height:8px;border-radius:50%;background:var(--steel-dark);display:block;}
  .graph-svg-wrap{padding:20px 10px 8px;}
  .graph-caption{
    text-align:center;
    font-family:'JetBrains Mono',monospace;
    font-size:12.5px;
    color:var(--text-lo);
    padding:14px 10px 6px;
    border-top:1px solid var(--steel-dark);
    margin-top:8px;
  }
  .graph-caption strong{color:var(--accent);font-weight:600;}

  /* graph node/edge svg styling */
  .g-node-rect{fill:var(--graphite-2);stroke:var(--steel-dark);stroke-width:1;}
  .g-node-rect.accent{stroke:var(--accent-dim);}
  .g-node-text{font-family:'JetBrains Mono',monospace;font-size:12px;fill:var(--text-hi);}
  .g-node-label{font-family:'JetBrains Mono',monospace;font-size:8.5px;fill:var(--text-lo);letter-spacing:0.08em;}
  .g-edge{stroke:var(--steel-dark);stroke-width:1.4;fill:none;}
  .g-dot{fill:var(--accent);}

  /* ---------- Data model section ---------- */
  .data-model-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;}
  .dm-card{
    background:#fff;border:1px solid var(--steel-light);border-radius:var(--radius);
  }
  .dm-card .dm-head{
    padding:16px 22px;border-bottom:1px solid var(--steel-light);
    font-family:'JetBrains Mono',monospace;font-size:12px;
    letter-spacing:0.08em;text-transform:uppercase;color:var(--text-dark-lo);
    display:flex;justify-content:space-between;
  }
  .dm-card ul{padding:8px 0;}
  .dm-card li{
    padding:12px 22px;
    font-size:14.5px;
    color:var(--text-dark);
    border-bottom:1px solid var(--offwhite-2);
    display:flex;justify-content:space-between;align-items:center;
  }
  .dm-card li:last-child{border-bottom:none;}
  .dm-card li .idx{font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--text-dark-lo);}

  /* ---------- Use cases ---------- */
  .usecase-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--steel-light);border:1px solid var(--steel-light);}
  .usecase-card{background:var(--offwhite);padding:32px 26px;}
  .usecase-card .uc-num{font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--accent-dim);margin-bottom:16px;}
  .usecase-card h3{margin-bottom:14px;}
  .usecase-card li{
    font-size:13.5px;color:var(--text-dark-lo);
    padding-left:14px;position:relative;margin-bottom:8px;line-height:1.5;
  }
  .usecase-card li::before{content:'—';position:absolute;left:0;color:var(--steel-light);}

  /* ---------- Differentiation table ---------- */
  .diff-table{width:100%;border-collapse:collapse;font-size:14px;}
  .diff-table th,.diff-table td{
    text-align:left;padding:16px 20px;border-bottom:1px solid var(--steel-dark);
  }
  .diff-table th{
    font-family:'JetBrains Mono',monospace;font-size:11.5px;letter-spacing:0.06em;
    text-transform:uppercase;color:var(--text-lo);font-weight:500;
  }
  .diff-table th:first-child, .diff-table td:first-child{color:var(--text-lo);}
  .diff-table td:nth-child(2){color:var(--accent);font-weight:500;}
  .diff-table td:nth-child(3),.diff-table td:nth-child(4){color:var(--text-lo);}
  .diff-table tr:last-child td{border-bottom:none;}

  /* ---------- Architecture ---------- */
  .arch-grid{display:grid;grid-template-columns:0.9fr 1.1fr;gap:56px;align-items:start;}
  .access-list li{
    display:flex;gap:16px;padding:18px 0;border-bottom:1px solid var(--steel-dark);
  }
  .access-list li:last-child{border-bottom:none;}
  .access-list .a-tag{
    font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--accent);
    border:1px solid var(--steel-dark);padding:5px 9px;height:fit-content;border-radius:2px;white-space:nowrap;
  }
  .access-list .a-body h3{font-size:15px;margin-bottom:4px;color:var(--text-hi);}
  .access-list .a-body p{font-size:13.5px;color:var(--text-lo);}
  .query-block{
    background:var(--navy-2);
    border:1px solid var(--steel-dark);
    border-radius:var(--radius);
    overflow:hidden;
  }
  .query-block .qb-bar{
    padding:10px 16px;border-bottom:1px solid var(--steel-dark);
    font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--text-lo);
    display:flex;justify-content:space-between;
  }
  .query-block pre{
    padding:22px 20px;
    font-family:'JetBrains Mono',monospace;
    font-size:13px;line-height:1.9;
    color:var(--text-lo);
    overflow-x:auto;
  }
  .query-block .kw{color:var(--accent);}
  .query-block .fld{color:var(--text-hi);}

  /* ---------- Trust section ---------- */
  .trust-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--steel-light);border:1px solid var(--steel-light);}
  .trust-card{background:var(--offwhite);padding:28px 26px;display:flex;gap:14px;align-items:flex-start;}
  .trust-card .t-mark{
    font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--accent-dim);
    border:1px solid var(--steel-light);width:26px;height:26px;
    display:flex;align-items:center;justify-content:center;flex-shrink:0;border-radius:2px;
  }
  .trust-card p{font-size:14px;color:var(--text-dark);font-weight:500;line-height:1.4;}

  /* ---------- Pull quote ---------- */
  .pull-quote{
    font-size:clamp(22px,3vw,32px);
    font-weight:700;
    color:var(--text-hi);
    border-left:3px solid var(--accent);
    padding-left:24px;
    max-width:720px;
    margin:8px 0 40px;
    line-height:1.35;
  }
  section.on-light .pull-quote, section.on-light-2 .pull-quote{color:var(--text-dark);border-color:var(--accent-dim);}

  /* ---------- Question grid ---------- */
  .question-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--steel-dark);border:1px solid var(--steel-dark);}
  .question-card{background:var(--navy-2);padding:20px 22px;display:flex;gap:12px;align-items:flex-start;}
  .question-card .q-idx{font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--accent);flex-shrink:0;padding-top:2px;}
  .question-card p{font-size:14px;color:var(--text-hi);line-height:1.5;}

  /* ---------- Closing CTA ---------- */
  .closing{
    background:var(--navy);
    text-align:center;
    padding:120px 0;
    border-top:1px solid var(--steel-dark);
  }
  .closing h2{color:#fff;max-width:760px;margin:0 auto 36px;}
  .closing-ctas{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;}

  /* ---------- Footer ---------- */
  footer{background:#070a11;color:var(--text-lo);padding:48px 0;border-top:1px solid var(--steel-dark);}
  .footer-grid{display:flex;justify-content:space-between;align-items:flex-start;flex-wrap:wrap;gap:24px;}
  footer .logo{margin-bottom:8px;}
  footer .foot-sub{font-size:12.5px;color:var(--text-lo);}
  .foot-links{display:flex;gap:24px;font-size:12.5px;}
  .foot-links a:hover{color:var(--text-hi);}
  .foot-contact{font-family:'JetBrains Mono',monospace;font-size:12px;color:var(--text-lo);}

  /* ---------- Responsive ---------- */
  @media (max-width:920px){
    .nav-links{display:none;}
    .problem-grid,.data-model-grid,.arch-grid{grid-template-columns:1fr;}
    .usecase-grid{grid-template-columns:repeat(2,1fr);}
    .trust-grid{grid-template-columns:1fr;}
    .question-grid{grid-template-columns:repeat(2,1fr);}
    .diff-table{font-size:12.5px;}
    .diff-table th,.diff-table td{padding:12px 10px;}
  }
  @media (max-width:560px){
    .usecase-grid{grid-template-columns:1fr;}
    .question-grid{grid-template-columns:1fr;}
    .wrap{padding:0 20px;}
    .hero{padding:80px 0 60px;}
    .sec{padding:64px 0;}
  }

  @media (prefers-reduced-motion: reduce){
    html{scroll-behavior:auto;}
    *{transition:none !important;animation:none !important;}
  }