:root{
    --bg:#000000;
    --surface:#0D0D0D;
    --line:#1F1F1F;
    --text:#EDEDED;
    --muted:#9A9A9A;
    --accent:#FF5A1F;
    --accent-dark:#E0430A;
  }
  *{margin:0;padding:0;box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{
    background:var(--bg);
    color:var(--text);
    font-family:'Instrument Sans',sans-serif;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  ::selection{background:var(--accent);color:#000}

  /* ---------- nav ---------- */
  nav{
    position:fixed;top:0;left:0;right:0;z-index:50;
    display:flex;align-items:center;justify-content:space-between;
    padding:20px 40px;
    transition:background .3s,border-color .3s;
    border-bottom:1px solid transparent;
  }
  nav.scrolled{background:rgba(0,0,0,.82);backdrop-filter:blur(12px);border-bottom-color:var(--line)}
  .wordmark{
    font-family:'Big Shoulders Display',sans-serif;
    font-weight:900;font-size:26px;letter-spacing:.14em;
    color:var(--text);text-decoration:none;text-transform:uppercase;
  }
  .wordmark em{font-style:normal;color:var(--accent)}
  .brand{display:inline-flex;align-items:center;gap:14px;text-decoration:none}
  .brand svg{display:block}
  .brand .wm{
    font-family:'Big Shoulders Display',sans-serif;font-weight:900;
    font-size:26px;letter-spacing:.1em;color:var(--text);text-transform:uppercase;line-height:1;
  }
  .brand .wm em{font-style:normal;color:var(--accent)}
  .brand .tag{
    display:block;margin-top:4px;
    font-family:'Space Grotesk',sans-serif;font-size:9px;font-weight:600;
    letter-spacing:.34em;color:var(--muted);text-transform:uppercase;
  }
  .nav-links{display:flex;gap:36px;list-style:none}
  .nav-links a{
    font-family:'Space Grotesk',sans-serif;font-size:12px;font-weight:600;
    letter-spacing:.28em;text-transform:uppercase;color:var(--muted);
    text-decoration:none;transition:color .2s;
  }
  .nav-links a:hover{color:var(--text)}
  .btn{
    display:inline-block;
    font-family:'Space Grotesk',sans-serif;font-size:12px;font-weight:700;
    letter-spacing:.24em;text-transform:uppercase;
    padding:14px 28px;text-decoration:none;transition:transform .15s,background .2s;
  }
  .btn:active{transform:scale(.97)}
  .btn-accent{background:var(--accent);color:#000}
  .btn-accent:hover{background:var(--accent-dark)}
  .btn-ghost{border:1px solid var(--line);color:var(--text)}
  .btn-ghost:hover{border-color:var(--text)}

  /* ---------- hero ---------- */
  .hero{
    min-height:100vh;
    display:flex;flex-direction:column;justify-content:center;align-items:center;
    text-align:center;padding:140px 24px 80px;position:relative;
  }
  .hero::before,.hero::after{
    content:"";position:absolute;width:28px;height:28px;
    border:1px solid #2A2A2A;
  }
  .hero::before{top:110px;left:40px;border-right:none;border-bottom:none}
  .hero::after{top:110px;right:40px;border-left:none;border-bottom:none}
  .kicker{
    font-family:'Cinzel',serif;font-size:13px;letter-spacing:.52em;
    text-transform:uppercase;color:#B9B9B9;margin-bottom:44px;
  }
  .kicker b{color:var(--accent);font-weight:600}
  h1{
    font-family:'Big Shoulders Display',sans-serif;font-weight:900;
    font-size:clamp(56px,11vw,150px);line-height:.92;
    text-transform:uppercase;letter-spacing:.005em;
  }
  h1 .raw{color:var(--accent)}
  .sub{
    max-width:640px;margin:36px auto 44px;
    font-size:18px;line-height:1.6;color:var(--muted);font-weight:400;
  }
  .cta-row{display:flex;gap:16px;flex-wrap:wrap;justify-content:center}
  .scroll-hint{
    position:absolute;bottom:32px;left:50%;transform:translateX(-50%);
    font-family:'Space Grotesk',sans-serif;font-size:11px;letter-spacing:.3em;
    text-transform:uppercase;color:#555;
  }

  /* ---------- section frame ---------- */
  section{padding:110px 40px;max-width:1280px;margin:0 auto}
  .sec-label{
    display:flex;align-items:center;gap:18px;margin-bottom:56px;
  }
  .sec-label .tick{width:10px;height:10px;background:var(--accent)}
  .sec-label span{
    font-family:'Space Grotesk',sans-serif;font-size:12px;font-weight:600;
    letter-spacing:.32em;text-transform:uppercase;color:var(--muted);
  }
  h2{
    font-family:'Big Shoulders Display',sans-serif;font-weight:800;
    font-size:clamp(40px,6vw,84px);line-height:.95;text-transform:uppercase;
    margin-bottom:48px;
  }

  /* ---------- transcript / chat demo ---------- */
  .transcript{
    border:1px solid var(--line);background:var(--surface);
    padding:0;
  }
  .transcript-head{
    display:flex;align-items:center;justify-content:space-between;
    padding:18px 28px;border-bottom:1px solid var(--line);
  }
  .transcript-head span{
    font-family:'Space Grotesk',sans-serif;font-size:11px;font-weight:600;
    letter-spacing:.3em;text-transform:uppercase;color:var(--muted);
  }
  .live-dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--accent);margin-right:10px;animation:pulse 1.6s infinite}
  @keyframes pulse{0%,100%{opacity:1}50%{opacity:.25}}
  .transcript-body{padding:40px 28px;min-height:340px;display:flex;flex-direction:column;gap:28px;justify-content:center}
  .line{display:grid;grid-template-columns:120px 1fr;gap:24px;align-items:baseline}
  .who{
    font-family:'Space Grotesk',sans-serif;font-size:11px;font-weight:700;
    letter-spacing:.26em;text-transform:uppercase;color:var(--muted);text-align:right;
  }
  .who.you{color:#6E6E6E}
  .who.ai{color:var(--accent)}
  .say{font-size:17px;line-height:1.65;color:#D6D6D6}
  .say.hidden-line{visibility:hidden}
  .cursor{display:inline-block;width:10px;height:20px;background:var(--accent);vertical-align:text-bottom;animation:blink 1s steps(1) infinite}
  @keyframes blink{50%{opacity:0}}

  /* ---------- method ---------- */
  .grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
  .cell{background:var(--bg);padding:44px 36px;transition:background .25s}
  .cell:hover{background:var(--surface)}
  .cell .num{
    font-family:'Big Shoulders Display',sans-serif;font-weight:900;
    font-size:56px;color:#2E2E2E;line-height:1;
  }
  .cell:hover .num{color:var(--accent)}
  .cell h3{
    font-family:'Big Shoulders Display',sans-serif;font-weight:800;
    font-size:28px;letter-spacing:.06em;text-transform:uppercase;margin:18px 0 12px;
  }
  .cell p{color:var(--muted);font-size:15px;line-height:1.65}

  /* ---------- models ---------- */
  .model-list{border-top:1px solid var(--line)}
  .model-row{
    display:grid;grid-template-columns:280px 1fr auto;gap:32px;align-items:center;
    padding:28px 8px;border-bottom:1px solid var(--line);transition:background .25s;
  }
  .model-row:hover{background:var(--surface)}
  .model-row h3{
    font-family:'Big Shoulders Display',sans-serif;font-weight:800;
    font-size:32px;letter-spacing:.05em;text-transform:uppercase;
  }
  .model-row p{color:var(--muted);font-size:15px;line-height:1.6}
  .pill{
    font-family:'Space Grotesk',sans-serif;font-size:10px;font-weight:700;
    letter-spacing:.26em;text-transform:uppercase;color:var(--accent);
    border:1px solid #3A2016;padding:8px 14px;white-space:nowrap;
  }

  /* ---------- numbers ---------- */
  .numbers{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
  .stat{background:var(--bg);padding:40px 28px;text-align:left}
  .stat b{
    display:block;font-family:'Big Shoulders Display',sans-serif;font-weight:900;
    font-size:clamp(40px,5vw,68px);line-height:1;
  }
  .stat b em{font-style:normal;color:var(--accent)}
  .stat span{
    display:block;margin-top:10px;font-family:'Space Grotesk',sans-serif;
    font-size:11px;letter-spacing:.28em;text-transform:uppercase;color:var(--muted);
  }

  /* ---------- faq ---------- */
  details{border-bottom:1px solid var(--line)}
  details:first-of-type{border-top:1px solid var(--line)}
  summary{
    list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;
    padding:26px 8px;gap:24px;
    font-family:'Space Grotesk',sans-serif;font-size:16px;font-weight:600;color:var(--text);
  }
  summary::-webkit-details-marker{display:none}
  summary .plus{
    font-family:'Big Shoulders Display',sans-serif;font-weight:900;
    font-size:30px;color:var(--accent);transition:transform .25s;line-height:1;
  }
  details[open] .plus{transform:rotate(45deg)}
  details p{padding:0 8px 26px;color:var(--muted);font-size:15px;line-height:1.7;max-width:760px}

  /* ---------- footer ---------- */
  footer{border-top:1px solid var(--line);padding:56px 40px;margin-top:40px}
  .foot-inner{max-width:1280px;margin:0 auto;display:flex;justify-content:space-between;gap:32px;flex-wrap:wrap}
  .foot-note{font-size:13px;color:#666;line-height:1.7;max-width:520px}
  .foot-note b{color:#888}
  .foot-links{display:flex;gap:28px;list-style:none}
  .foot-links a{color:var(--muted);text-decoration:none;font-size:13px}
  .foot-links a:hover{color:var(--text)}

  /* ---------- responsive ---------- */
  @media(max-width:900px){
    nav{padding:16px 20px}
    .nav-links{display:none}
    section{padding:80px 20px}
    .numbers{grid-template-columns:repeat(2,1fr)}
    .grid3{grid-template-columns:1fr}
    .line{grid-template-columns:1fr;gap:6px}
    .who{text-align:left}
    .hero::before,.hero::after{display:none}
    .model-row{grid-template-columns:1fr;gap:10px;padding:24px 4px}
  }
  @media(prefers-reduced-motion:reduce){
    .cursor,.live-dot{animation:none}
    html{scroll-behavior:auto}
  }

  /* ---------- shared nav right ---------- */
  .nav-right{display:flex;align-items:center;gap:18px}
  .nav-login{
    font-family:'Space Grotesk',sans-serif;font-size:12px;font-weight:600;
    letter-spacing:.24em;text-transform:uppercase;color:var(--muted);
    text-decoration:none;transition:color .2s;
  }
  .nav-login:hover{color:var(--text)}
  .nav-right .btn{padding:12px 22px}

  /* ---------- page head (subpages) ---------- */
  .page-head{
    min-height:auto;padding:170px 40px 100px;max-width:1080px;margin:0 auto;
  }

  /* ---------- auth ---------- */
  .auth-wrap{max-width:560px;text-align:center}
  .auth-title{
    font-family:'Big Shoulders Display',sans-serif;font-weight:900;
    font-size:clamp(48px,8vw,90px);line-height:.92;text-transform:uppercase;margin-bottom:40px;
  }
  .auth-card{
    background:var(--surface);border:1px solid var(--line);
    padding:36px;display:flex;flex-direction:column;gap:22px;text-align:left;
  }
  .field{display:flex;flex-direction:column;gap:8px}
  .field label{
    font-family:'Space Grotesk',sans-serif;font-size:11px;font-weight:600;
    letter-spacing:.28em;text-transform:uppercase;color:var(--muted);
  }
  .field input{
    background:var(--bg);border:1px solid var(--line);color:var(--text);
    padding:14px 16px;font-family:'Instrument Sans',sans-serif;font-size:16px;
    outline:none;transition:border-color .2s;
  }
  .field input:focus{border-color:var(--accent)}
  .btn-block{width:100%;text-align:center;border:none;cursor:pointer}
  .auth-alt{font-size:14px;color:var(--muted);text-align:center}
  .auth-alt a{color:var(--accent);text-decoration:none}
  .auth-alt a:hover{text-decoration:underline}
  .auth-note{font-size:13px;color:#777;line-height:1.7}
  .auth-err{font-size:14px;color:var(--accent);border:1px solid #3A2016;background:#160A05;padding:12px 16px}

  /* ---------- dashboard ---------- */
  .dash-title{
    font-family:'Big Shoulders Display',sans-serif;font-weight:900;
    font-size:clamp(48px,7vw,90px);line-height:.92;text-transform:uppercase;margin-bottom:16px;
  }
  .panel{background:var(--surface);border:1px solid var(--line);padding:36px;margin-top:36px}
  .key-row{display:flex;gap:16px;align-items:center;flex-wrap:wrap;margin-bottom:18px}
  .key-box{
    flex:1;min-width:260px;background:var(--bg);border:1px solid var(--line);
    color:var(--text);font-family:'Space Grotesk',monospace;font-size:15px;
    padding:14px 16px;overflow-x:auto;white-space:nowrap;
  }
  .key-actions{display:flex;gap:10px;flex-wrap:wrap}
  .credit-line{display:flex;align-items:baseline;gap:16px;margin-bottom:26px}
  .credit-amount{
    font-family:'Big Shoulders Display',sans-serif;font-weight:900;
    font-size:clamp(44px,6vw,72px);color:var(--accent);line-height:1;
  }
  .credit-cap{
    font-family:'Space Grotesk',sans-serif;font-size:11px;letter-spacing:.28em;
    text-transform:uppercase;color:var(--muted);
  }
  .packs{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
  .pack{
    background:var(--bg);border:none;cursor:pointer;padding:30px 20px;
    display:flex;flex-direction:column;gap:8px;align-items:flex-start;
    transition:background .25s;
  }
  .pack:hover{background:#16100D}
  .pack b{
    font-family:'Big Shoulders Display',sans-serif;font-weight:900;
    font-size:44px;color:var(--text);line-height:1;
  }
  .pack:hover b{color:var(--accent)}
  .pack span{
    font-family:'Space Grotesk',sans-serif;font-size:11px;letter-spacing:.26em;
    text-transform:uppercase;color:var(--muted);
  }

  /* ---------- tables ---------- */
  .table{width:100%;border-collapse:collapse}
  .table th{
    text-align:left;font-family:'Space Grotesk',sans-serif;font-size:11px;font-weight:700;
    letter-spacing:.28em;text-transform:uppercase;color:var(--muted);
    padding:14px 12px;border-bottom:1px solid var(--line);
  }
  .table td{
    padding:16px 12px;border-bottom:1px solid var(--line);
    font-size:15px;color:#D6D6D6;
  }
  .table td:first-child{font-family:'Space Grotesk',sans-serif;font-weight:600;color:var(--text)}

  /* ---------- docs ---------- */
  .docs{max-width:920px}
  .docs-block{margin-top:56px}
  .tabs{display:flex;gap:8px;margin-bottom:0}
  .tab{
    background:transparent;border:1px solid var(--line);color:var(--muted);
    font-family:'Space Grotesk',sans-serif;font-size:11px;font-weight:700;
    letter-spacing:.22em;text-transform:uppercase;padding:10px 18px;
    cursor:pointer;transition:color .2s,border-color .2s;
  }
  .tab:hover{color:var(--text)}
  .tab.on{color:var(--accent);border-color:var(--accent)}
  .tab-pane{display:none}
  .tab-pane.on{display:block}
  .codeblock{
    background:var(--surface);border:1px solid var(--line);border-top:none;
    padding:26px;overflow-x:auto;margin:0;
  }
  .docs-block .codeblock:first-of-type:not(.tabs ~ .codeblock){border-top:1px solid var(--line)}
  .tabs + .tab-pane .codeblock{border-top:none}
  .codeblock code{
    font-family:'Space Grotesk',monospace;font-size:14px;line-height:1.7;
    color:#D6D6D6;white-space:pre;
  }
  .docs-note{margin-top:20px;color:var(--muted);font-size:15px;line-height:1.7}
  .docs-note a{color:var(--accent);text-decoration:none}
  .docs-note a:hover{text-decoration:underline}
  code.inline{
    background:var(--surface);border:1px solid var(--line);
    padding:2px 8px;font-family:'Space Grotesk',monospace;font-size:13px;color:var(--text);
  }

  /* ---------- toast ---------- */
  .toast{
    position:fixed;bottom:28px;right:28px;z-index:100;
    background:var(--surface);border:1px solid var(--accent);color:var(--text);
    font-family:'Space Grotesk',sans-serif;font-size:13px;
    padding:14px 20px;max-width:340px;
    opacity:0;transform:translateY(12px);transition:opacity .3s,transform .3s;
  }
  .toast.err{border-color:#7A2E12;color:#F0B9A4}
  .toast.show{opacity:1;transform:translateY(0)}

  @media(max-width:900px){
    .page-head{padding:140px 20px 70px}
    .packs{grid-template-columns:1fr}
    .auth-card{padding:26px 20px}
    .nav-right .btn{padding:10px 16px}
  }