:root{
    --ink:#0E141B;
    --panel:#161E27;
    --panel-2:#121920;
    --line:#2A3441;
    --line-soft:#1E2833;
    --text:#E7EBEE;
    --text-dim:#8B98A5;
    --amber:#E8A33D;
    --amber-ink:#1a1300;
    --teal:#4FB6A8;
    --rust:#C86450;
    --radius:6px;
    --maxw:1100px;
    --display:'Space Grotesk','Helvetica Neue',Arial,sans-serif;
    --body:'Inter',system-ui,-apple-system,'Segoe UI',sans-serif;
    --mono:'JetBrains Mono','SF Mono',Menlo,Consolas,monospace;
  }
  *{box-sizing:border-box;margin:0;padding:0;}
  html{scroll-behavior:smooth;}
  body{background:var(--ink);color:var(--text);font-family:var(--body);font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased;}
  h1,h2,h3{font-family:var(--display);font-weight:600;line-height:1.15;letter-spacing:-0.01em;}
  code,.mono{font-family:var(--mono);}
  a{color:inherit;text-decoration:none;}
  a:focus-visible,button:focus-visible{outline:2px solid var(--amber);outline-offset:3px;}
  .wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px;}

  /* NAV */
  header{border-bottom:1px solid var(--line);position:sticky;top:0;background:rgba(14,20,27,0.92);backdrop-filter:blur(6px);z-index:50;}
  .nav-inner{display:flex;align-items:center;justify-content:space-between;padding:16px 28px;max-width:var(--maxw);margin:0 auto;}
  .brand{font-family:var(--display);font-weight:700;font-size:1.05rem;display:flex;align-items:center;gap:9px;}
  /* Fallback only. The header and footer now use the SVG lockup and mark;
     this rule stays for any brand link that ships without an image. */
  .brand-mark{width:9px;height:9px;border-radius:2px;background:var(--amber);flex-shrink:0;}
  .brand-lockup{height:40px;width:auto;display:block;}
  .brand-mark-img{height:18px;width:auto;flex-shrink:0;display:block;}
  nav ul{list-style:none;display:flex;gap:32px;}
  nav a{color:var(--text-dim);font-size:0.92rem;transition:color .15s ease;}
  nav a:hover,nav a:focus-visible{color:var(--text);}
  .nav-cta{background:var(--amber);color:var(--amber-ink);padding:9px 18px;border-radius:var(--radius);font-weight:600;font-size:0.9rem;}

  /* BUTTONS */
  .btn-primary{background:var(--amber);color:var(--amber-ink);padding:13px 24px;border-radius:var(--radius);font-weight:600;font-size:0.95rem;display:inline-block;transition:opacity .15s ease;text-align:center;}
  .btn-primary:hover,.btn-primary:focus-visible{opacity:0.88;}
  .btn-secondary{border:1px solid var(--line);padding:13px 24px;border-radius:var(--radius);font-weight:500;font-size:0.95rem;color:var(--text);display:inline-block;transition:border-color .15s ease;text-align:center;}
  .btn-secondary:hover,.btn-secondary:focus-visible{border-color:var(--text-dim);}

  /* HERO */
  .hero{padding:88px 0 96px;border-bottom:1px solid var(--line);position:relative;overflow:hidden;}
  .hero::before{
    content:"";position:absolute;inset:0;
    background-image:radial-gradient(var(--line-soft) 1px, transparent 1px);
    background-size:26px 26px;
    -webkit-mask-image:radial-gradient(ellipse 70% 80% at 75% 45%, #000 20%, transparent 75%);
    mask-image:radial-gradient(ellipse 70% 80% at 75% 45%, #000 20%, transparent 75%);
    pointer-events:none;
  }
  .hero .wrap{position:relative;}
  .hero-grid{display:grid;grid-template-columns:1.05fr 0.95fr;gap:64px;align-items:center;}
  .hero h1{font-size:2.65rem;margin-bottom:22px;}
  .hero p.lede{color:var(--text-dim);font-size:1.08rem;max-width:46ch;margin-bottom:32px;}
  .hero-ctas{display:flex;gap:14px;margin-bottom:34px;flex-wrap:wrap;}
  .hero-meta{display:flex;gap:26px;color:var(--text-dim);font-size:0.85rem;flex-wrap:wrap;}
  .hero-meta span{display:flex;align-items:center;gap:7px;}
  .dot{width:5px;height:5px;border-radius:50%;background:var(--text-dim);flex-shrink:0;}

  /* TERMINAL */
  .terminal{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:0 0 0 1px rgba(232,163,61,0.06), 0 30px 60px -30px rgba(0,0,0,0.6);}
  .terminal-bar{display:flex;align-items:center;gap:7px;padding:11px 14px;border-bottom:1px solid var(--line);background:var(--panel-2);}
  .terminal-bar .tl{width:9px;height:9px;border-radius:50%;background:var(--line);flex-shrink:0;}
  .terminal-bar .label{margin-left:8px;font-family:var(--mono);font-size:0.75rem;color:var(--text-dim);}
  .terminal-body{padding:20px 18px;font-family:var(--mono);font-size:0.82rem;line-height:1.7;min-height:250px;overflow-x:auto;white-space:nowrap;}
  .terminal-body .prompt{color:var(--teal);}
  .terminal-body .cmd{color:var(--text);}
  .term-line{opacity:0;transform:translateY(4px);animation:termIn .35s ease forwards;}
  @keyframes termIn{to{opacity:1;transform:translateY(0);}}
  .route-broken{color:var(--rust);}
  .route-fixed{color:var(--teal);}
  .term-note{color:var(--text-dim);}
  @media (prefers-reduced-motion: reduce){.term-line{animation:none;opacity:1;transform:none;}}

  /* SECTIONS */
  section{padding:84px 0;border-bottom:1px solid var(--line);}
  section:last-of-type{border-bottom:none;}
  .section-head{max-width:60ch;margin-bottom:48px;}
  .section-head h2{font-size:1.9rem;margin-bottom:14px;}
  .section-head p{color:var(--text-dim);font-size:1.02rem;}

  /* PRINCIPLES */
  .principles{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;}
  .principle{background:var(--ink);padding:30px 26px;}
  .principle h3{font-size:1.05rem;margin-bottom:10px;color:var(--amber);}
  .principle p{color:var(--text-dim);font-size:0.93rem;}

  /* SAMPLE LAB */
  .sample{background:var(--panel-2);}
  .sample-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:stretch;}
  .topo{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:22px;display:flex;flex-direction:column;}
  .topo-title{font-family:var(--mono);font-size:0.78rem;color:var(--text-dim);margin-bottom:14px;}
  .topo svg{width:100%;height:auto;display:block;}
  .topo-caption{margin-top:auto;padding-top:16px;color:var(--text-dim);font-size:0.88rem;}
  .doc{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;}
  .doc-bar{padding:11px 16px;border-bottom:1px solid var(--line);background:var(--panel-2);font-family:var(--mono);font-size:0.75rem;color:var(--text-dim);}
  .doc-body{padding:22px 24px;font-size:0.92rem;flex:1;}
  .doc-body h3{font-size:1rem;margin:0 0 8px;}
  .doc-body h3 + p{color:var(--text-dim);margin-bottom:18px;}
  .doc-body .expect{display:grid;grid-template-columns:auto 1fr;gap:6px 14px;font-family:var(--mono);font-size:0.8rem;margin-bottom:18px;}
  .doc-body .expect .k{color:var(--text-dim);}
  .doc-body ol{padding-left:20px;color:var(--text-dim);}
  .doc-body ol li{margin-bottom:8px;}
  .doc-body .fade{position:relative;}
  .doc-body .fade::after{content:"";position:absolute;left:0;right:0;bottom:-6px;height:70px;background:linear-gradient(to bottom, rgba(22,30,39,0), var(--panel));}
  .sample-cta{margin-top:28px;display:flex;gap:14px;align-items:center;flex-wrap:wrap;}
  .sample-cta p{color:var(--text-dim);font-size:0.9rem;}

  /* LAB LIST */
  .lab-groups{display:grid;grid-template-columns:1fr 1fr;gap:28px;}
  .lab-group-title{font-family:var(--mono);font-size:0.8rem;color:var(--text-dim);margin-bottom:12px;padding-left:2px;}
  .lab-list{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;}
  .lab-row{display:grid;grid-template-columns:auto 1fr;gap:16px;align-items:start;padding:18px 20px;border-bottom:1px solid var(--line);}
  .lab-row:last-child{border-bottom:none;}
  .lab-num{font-family:var(--mono);color:var(--text-dim);font-size:0.82rem;padding-top:3px;}
  .lab-info h3{font-size:1rem;margin-bottom:4px;}
  .lab-info p{color:var(--text-dim);font-size:0.88rem;}
  .lab-info .free{font-family:var(--mono);font-size:0.72rem;color:var(--teal);margin-left:8px;}

  /* STEPS */
  .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
  .step{padding-top:18px;border-top:2px solid var(--line);}
  .step .step-num{font-family:var(--mono);color:var(--amber);font-size:0.85rem;display:block;margin-bottom:10px;}
  .step h3{font-size:1rem;margin-bottom:8px;}
  .step p{color:var(--text-dim);font-size:0.88rem;}

  /* PRICING */
  .price-panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);display:grid;grid-template-columns:1.1fr 0.9fr;overflow:hidden;}
  .price-main{padding:44px;}
  .price-main .amount{font-family:var(--display);font-size:2.8rem;font-weight:700;margin-bottom:4px;line-height:1;}
  .price-main .amount span{font-size:1rem;color:var(--text-dim);font-weight:500;font-family:var(--body);}
  .price-main .sub{color:var(--text-dim);font-size:0.95rem;margin-bottom:22px;}
  .price-includes{list-style:none;color:var(--text-dim);font-size:0.93rem;margin-bottom:28px;}
  .price-includes li{padding:6px 0;display:flex;gap:10px;}
  .price-includes li::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--teal);margin-top:9px;flex-shrink:0;}
  .price-tree{background:var(--panel-2);border-left:1px solid var(--line);padding:32px 30px;font-family:var(--mono);font-size:0.78rem;line-height:1.75;color:var(--text-dim);}
  .price-tree .t{color:var(--text-dim);font-size:0.72rem;margin-bottom:10px;}
  .price-tree .d{color:var(--text);}
  .price-tree .f{color:var(--text-dim);}

  /* FAQ */
  .faq-item{border-bottom:1px solid var(--line);padding:24px 0;}
  .faq-item:first-of-type{border-top:1px solid var(--line);}
  .faq-item h3{font-size:1.02rem;margin-bottom:8px;}
  .faq-item p{color:var(--text-dim);font-size:0.93rem;max-width:65ch;}

  /* FOOTER */
  footer{padding:40px 0;border-top:1px solid var(--line);}
  .footer-inner{display:flex;justify-content:space-between;align-items:center;color:var(--text-dim);font-size:0.85rem;gap:16px;}
  .footer-inner a{color:var(--text-dim);}
  .footer-inner a:hover{color:var(--text);}

  /* RESPONSIVE */
  @media (max-width:900px){
    nav ul{display:none;}
    .hero{padding:56px 0 64px;}
    .hero-grid{grid-template-columns:1fr;gap:36px;}
    .hero h1{font-size:2.1rem;}
    .hero-ctas{flex-direction:column;}
    .hero-ctas a{width:100%;}
    .terminal-body{font-size:0.76rem;padding:16px 14px;min-height:0;}
    section{padding:60px 0;}
    .section-head h2{font-size:1.6rem;}
    .principles{grid-template-columns:1fr;}
    .sample-grid{grid-template-columns:1fr;}
    .lab-groups{grid-template-columns:1fr;}
    .steps{grid-template-columns:1fr 1fr;}
    .price-panel{grid-template-columns:1fr;}
    .price-main{padding:30px 24px;}
    .price-main .btn-primary{width:100%;}
    .price-tree{border-left:none;border-top:1px solid var(--line);padding:24px;}
    .footer-inner{flex-direction:column;align-items:flex-start;}
  }

  /* Below ~406px the 40px lockup and the nav CTA collide and the button
     wraps to two lines. Step the lockup down so both stay on one line. */
  @media (max-width:480px){
    .brand-lockup{height:32px;}
  }

/* ---------- DOC PAGES ---------- */
.doc-page{max-width:760px;margin:0 auto;padding:64px 28px 96px;}
.doc-page h1{font-size:2.2rem;margin-bottom:12px;}
.doc-page .lead{color:var(--text-dim);font-size:1.05rem;margin-bottom:40px;}
.doc-page h2{font-size:1.4rem;margin:44px 0 14px;}
.doc-page h3{font-size:1.05rem;margin:26px 0 8px;}
.doc-page p,.doc-page li{color:var(--text);font-size:0.97rem;}
.doc-page p{margin-bottom:14px;}
.doc-page ul,.doc-page ol{padding-left:22px;margin-bottom:14px;}
.doc-page li{margin-bottom:6px;}
.doc-page pre{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px;font-family:var(--mono);font-size:0.82rem;line-height:1.6;overflow-x:auto;margin:10px 0 18px;}
.doc-page code{font-family:var(--mono);font-size:0.88em;background:var(--panel);padding:1px 5px;border-radius:3px;}
.doc-page pre code{background:none;padding:0;}
.doc-page .callout{border-left:3px solid var(--amber);background:var(--panel);padding:14px 18px;border-radius:0 var(--radius) var(--radius) 0;margin:18px 0;}
.doc-page .callout p{margin:0;color:var(--text-dim);}
.doc-page .steps-list{counter-reset:s;list-style:none;padding:0;}
.doc-page .steps-list>li{counter-increment:s;padding-left:38px;position:relative;margin-bottom:22px;}
/* Step titles sit on their own line. Collapses against a following <pre>,
   so steps that open with a code block keep their existing spacing. */
.doc-page .steps-list>li>strong{display:block;margin-bottom:6px;}
.doc-page .steps-list>li::before{content:counter(s);position:absolute;left:0;top:0;font-family:var(--mono);color:var(--amber);font-size:0.85rem;width:26px;height:26px;border:1px solid var(--line);border-radius:50%;display:flex;align-items:center;justify-content:center;}
.doc-page details{border:1px solid var(--line);border-radius:var(--radius);margin:22px 0;background:var(--panel-2);}
.doc-page summary{cursor:pointer;padding:14px 18px;font-weight:600;font-family:var(--display);list-style:none;}
.doc-page summary::-webkit-details-marker{display:none;}
.doc-page summary::before{content:"+";font-family:var(--mono);color:var(--amber);margin-right:12px;}
.doc-page details[open] summary::before{content:"–";}
.doc-page details>div{padding:4px 18px 18px;border-top:1px solid var(--line);}
.doc-page .expect{display:grid;grid-template-columns:auto 1fr;gap:6px 16px;font-family:var(--mono);font-size:0.85rem;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px;margin:14px 0 20px;}
.doc-page .expect .k{color:var(--text-dim);}
/* ---------- INSTALL TRACKS ---------- */
/* Each track is a panel with a full-height coloured rail, so the reader can
   tell at a glance which platform's steps they are scrolled into. */
.track-jump{display:flex;gap:10px;flex-wrap:wrap;margin:0 0 20px;}
.track-jump a{font-family:var(--mono);font-size:0.82rem;color:var(--text-dim);border:1px solid var(--line);border-radius:var(--radius);padding:7px 14px;transition:color .15s ease,border-color .15s ease;}
.track-jump a:hover,.track-jump a:focus-visible{color:var(--text);border-color:var(--text-dim);}
.track{border:1px solid var(--line);border-left:3px solid var(--amber);border-radius:var(--radius);background:var(--panel-2);padding:24px 26px 6px;margin:0 0 26px;scroll-margin-top:88px;}
.track>h3{margin:0 0 6px;font-size:1.2rem;color:var(--amber);}
.track .track-sub{color:var(--text-dim);font-size:0.92rem;margin-bottom:20px;}
.track .steps-list>li:last-child{margin-bottom:16px;}
.track-win{border-left-color:var(--teal);}
.track-win>h3{color:var(--teal);}
.track-win .steps-list>li::before{color:var(--teal);}
@media (max-width:900px){
  .track{padding:20px 18px 4px;}
}

.crumb{color:var(--text-dim);font-size:0.85rem;margin-bottom:22px;display:block;}
.crumb:hover{color:var(--text);}
.topo-figure{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px;margin:18px 0 24px;}
.topo-figure svg{width:100%;height:auto;display:block;}