:root{
    --bg:#0b0f14;
    --card:#0f1620;
    --text:#e7eef7;
    --muted:#a9b4c0;
    --line:#1f2a37;
    --accent:#76b7ff;
    --accent2:#9ae6b4;
  }
  *{box-sizing:border-box}
  html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial}
  html{scroll-padding-top:72px}
  a{color:var(--accent);text-decoration:none}
  a:hover{text-decoration:underline}
  .container{max-width:1040px;margin:0 auto;padding:24px}
  header{border-bottom:1px solid var(--line);background:rgba(11,15,20,.7);backdrop-filter:blur(8px);position:sticky;top:0;z-index:10}
  .nav{display:flex;gap:16px;align-items:center;justify-content:space-between}
  .brand{display:flex;gap:10px;align-items:center}
  .logo{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--accent),var(--accent2));}
  .brand strong{letter-spacing:.2px}
  .navLinks{display:flex;align-items:center}
  .navLinks a{margin:0 10px;color:var(--text);font-size:14px}
  .navLinks a.active{color:var(--accent);text-decoration:none;border-bottom:2px solid var(--accent);padding-bottom:6px}
  .navToggle{display:none;align-items:center;gap:8px;padding:8px 12px;border-radius:12px;border:1px solid var(--line);background:#0c131c;color:var(--text);cursor:pointer;font-size:14px}
  .hero{padding:56px 0 24px}
  .kicker{color:var(--muted);font-size:13px;letter-spacing:.18em;text-transform:uppercase;margin-bottom:10px}
  h1{font-size:42px;line-height:1.1;margin:0 0 14px;color:var(--text)}
  h2{font-size:22px;margin:0 0 8px;color:var(--text)}
  h3{font-size:16px;margin:0 0 6px;color:var(--text)}
  p{color:var(--muted);font-size:15.5px;line-height:1.7;margin:0 0 12px}
  .grid{display:grid;grid-template-columns:repeat(12,1fr);gap:18px;margin:20px 0}
  .card{grid-column:span 6;background:var(--card);border:1px solid var(--line);border-radius:18px;padding:20px 22px}
  .card.span4{grid-column:span 4}
  .card.span12{grid-column:span 12}
  .card h3{margin:8px 0 6px}
  .card p{margin:0;font-size:14.5px}
  .card ul{margin:10px 0 0 18px;color:var(--muted);line-height:1.7;font-size:14.5px}
  .card ul li{margin-bottom:4px}
  .ctaRow{display:flex;flex-wrap:wrap;gap:12px;margin:20px 0}
  .btn{display:inline-block;padding:10px 18px;border-radius:12px;border:1px solid var(--line);background:#0c131c;color:var(--text);font-size:14px;cursor:pointer}
  .btn.primary{border-color:rgba(118,183,255,.6);background:rgba(118,183,255,.12);color:var(--accent)}
  .btn.green{border-color:rgba(154,230,180,.5);background:rgba(154,230,180,.1);color:var(--accent2)}
  .btn:hover{filter:brightness(1.12);text-decoration:none}
  .sectionTitle{margin:44px 0 6px;font-size:22px;color:var(--text)}
  .sectionSub{margin:0 0 4px;font-size:15px;color:var(--muted)}
  .twoCol{display:grid;grid-template-columns:1.15fr .85fr;gap:18px;margin:14px 0}
  .pill{display:inline-block;font-size:12px;color:var(--muted);border:1px solid var(--line);padding:5px 11px;border-radius:999px;margin:0 6px 6px 0}
  .pill.blue{border-color:rgba(118,183,255,.4);color:var(--accent);background:rgba(118,183,255,.07)}
  .pill.green{border-color:rgba(154,230,180,.4);color:var(--accent2);background:rgba(154,230,180,.06)}
  .pill.orange{border-color:rgba(255,159,67,.4);color:#ff9f43;background:rgba(255,159,67,.07)}
  .stat-row{display:flex;flex-wrap:wrap;gap:10px;margin:24px 0 0;padding:20px;background:var(--card);border:1px solid var(--line);border-radius:18px}
  .stat-item{flex:1;min-width:120px;text-align:center;padding:8px}
  .stat-item .stat-num{font-size:30px;font-weight:700;color:var(--accent);letter-spacing:-.5px;display:block}
  .stat-item .stat-label{font-size:12px;color:var(--muted);letter-spacing:.06em;text-transform:uppercase;margin-top:2px;display:block}
  .accent-card{background:linear-gradient(135deg,rgba(118,183,255,.08),rgba(154,230,180,.05));border:1px solid rgba(118,183,255,.25);border-radius:18px;padding:28px 30px;margin:20px 0}
  .accent-card h2{color:var(--accent);margin-bottom:8px}
  .icon-mark{width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,var(--accent),var(--accent2));display:flex;align-items:center;justify-content:center;font-size:18px;margin-bottom:12px}
  .divider{border:none;border-top:1px solid var(--line);margin:40px 0}
  .disclaimer{margin:28px 0 10px;padding:14px 18px;border-radius:16px;border:1px solid var(--line);background:rgba(255,255,255,.03);color:var(--muted);font-size:13px;line-height:1.6}
  /* sl-logo mark */
  .sl-logo{position:relative;flex-shrink:0;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#0d1826,#0b1520);border-radius:12px;overflow:hidden}
  .sl-logo::before{content:'';position:absolute;inset:0;background:rgba(8,16,30,.45)}
  .sl-logo .sl-stack{position:absolute;inset:0;z-index:1}
  .sl-logo .sl-top,.sl-logo .sl-bot{position:absolute;font-weight:800;letter-spacing:.05em;line-height:1;display:block}
  .sl-logo .sl-top{top:50%;left:50%;transform:translate(-100%,-100%);color:#ff9f43;text-shadow:0 0 12px rgba(255,159,67,.85),0 1px 4px rgba(0,0,0,.9)}
  .sl-logo .sl-bot{top:50%;left:50%;transform:translate(0,0);color:#76b7ff;text-shadow:0 0 12px rgba(118,183,255,.85),0 1px 4px rgba(0,0,0,.9)}
  .sl-logo .sl-rule{position:absolute;top:50%;left:50%;width:142%;height:1px;background:linear-gradient(to right,rgba(255,159,67,.25),rgba(255,255,255,.18),rgba(118,183,255,.25));transform:translate(-50%,-50%) rotate(45deg)}
  .sl-logo.sm{width:36px;height:36px;border-radius:10px}
  .sl-logo.sm .sl-top,.sl-logo.sm .sl-bot{font-size:11px}
  footer{border-top:1px solid var(--line);margin-top:40px;padding:22px 0;color:var(--muted);font-size:13px}
  /* arch nodes */
  .arch-nodes{display:flex;flex-wrap:wrap;gap:10px;margin:14px 0}
  .arch-node{border:1px solid var(--line);border-radius:12px;padding:10px 14px;background:var(--card);font-size:13px;color:var(--muted)}
  .arch-node strong{color:var(--text);display:block;font-size:13px;margin-bottom:2px}
  /* step list */
  .how-steps{margin:14px 0;counter-reset:step}
  .how-step{display:flex;gap:16px;align-items:flex-start;margin:14px 0;counter-increment:step}
  .how-step::before{content:counter(step);min-width:28px;height:28px;border-radius:50%;background:rgba(118,183,255,.14);border:1px solid rgba(118,183,255,.3);color:var(--accent);font-size:13px;font-weight:700;display:flex;align-items:center;justify-content:center;flex-shrink:0;margin-top:2px}
  .how-step p{margin:0;font-size:14.5px}
  .how-step strong{color:var(--text)}
  @media (max-width:900px){
    .card,.card.span4{grid-column:span 12}
    .twoCol{grid-template-columns:1fr}
    h1{font-size:34px}
    .stat-row{gap:8px}
    .stat-item .stat-num{font-size:26px}
  }
  @media (max-width:800px){
    .nav{flex-wrap:wrap}
    .navToggle{display:inline-flex}
    .navLinks{width:100%;display:none;flex-direction:column;gap:6px;margin-top:10px;padding-top:10px;border-top:1px solid var(--line)}
    .navLinks a{margin:0;padding:8px 0}
    .navLinks a.active{border-bottom:0}
    header.nav-open .navLinks{display:flex}
  }
  /* ── Form inputs ──────────────────────────────────────── */
  .demo-form label{display:block;font-size:13px;color:var(--muted);margin:12px 0 4px;letter-spacing:.04em}
  .demo-form input,
  .demo-form select,
  .demo-form textarea{
    width:100%;
    background:var(--card);
    border:1px solid var(--line);
    border-radius:10px;
    color:var(--text);
    font-size:14px;
    padding:10px 13px;
    outline:none;
    transition:border-color .15s;
    appearance:none;
    -webkit-appearance:none;
  }
  .demo-form input::placeholder,
  .demo-form textarea::placeholder{color:var(--muted);opacity:.7}
  .demo-form input:focus,
  .demo-form select:focus,
  .demo-form textarea:focus{border-color:rgba(118,183,255,.55)}
  .demo-form select option{background:var(--card);color:var(--text)}
  .demo-form textarea{resize:vertical;min-height:80px}