:root {
  --bg: #f9fafb;
  --surface: #ffffff;
  --surface-2: #f1f5f9;
  --ink: #0f172a;
  --ink-light: #334155;
  --ink-lighter: #64748b;
  --primary: #3b82f6;
  --primary-dark: #1d4ed8;
  --primary-10: rgba(59,130,246,0.10);
  --accent: #0891b2;
  --success: #059669;
  --radius: 16px;
  --radius-lg: 24px;
  --shadow-sm: 0 4px 12px rgba(15,23,42,0.08);
  --shadow: 0 10px 38px rgba(15,23,42,0.10);
  --shadow-lg: 0 20px 60px rgba(15,23,42,0.14);
  --header-bg: rgba(249,250,251,0.92);
  --header-border: rgba(226,232,240,0.80);
  --transition: all 0.38s cubic-bezier(0.16,1,0.3,1);
}
[data-theme="dark"] {
  --bg: #0f172a;
  --surface: #1e293b;
  --surface-2: #152038;
  --ink: #f1f5f9;
  --ink-light: #cbd5e1;
  --ink-lighter: #94a3b8;
  --header-bg: rgba(15,23,42,0.92);
  --header-border: rgba(51,65,85,0.70);
  --shadow: 0 10px 38px rgba(0,0,0,0.42);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.52);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{font-family:'Inter',system-ui,sans-serif;background:var(--bg);color:var(--ink);line-height:1.6;overflow-x:hidden;}
a{color:inherit;text-decoration:none;transition:var(--transition);}
a:hover{color:var(--primary);}
.container{max-width:1200px;margin:0 auto;padding:0 20px;}
/* Accessibility */
.skip-link{position:absolute;left:-999px;top:auto;width:1px;height:1px;overflow:hidden;}
.skip-link:focus{left:16px;top:16px;width:auto;height:auto;padding:12px 16px;border-radius:14px;background:var(--surface);border:1px solid var(--ink-lighter);box-shadow:var(--shadow);z-index:9999;}
/* Header */
.site-header{position:fixed;top:0;left:0;right:0;z-index:1000;backdrop-filter:blur(18px);background:var(--header-bg);border-bottom:1px solid var(--header-border);transition:box-shadow .25s ease,border-color .25s ease;}
.site-header.scrolled{box-shadow:var(--shadow);border-bottom-color:var(--primary-10);}
.nav{display:flex;align-items:center;justify-content:space-between;padding:16px 0;gap:16px;}
.logo{font-size:26px;font-weight:900;letter-spacing:-1.2px;display:flex;align-items:center;gap:12px;background:linear-gradient(135deg,var(--ink),var(--primary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;}
.logo-icon{width:40px;height:40px;border-radius:50%;background:conic-gradient(from 160deg at 50% 50%, var(--primary), var(--accent), var(--primary));position:relative;box-shadow:0 0 40px rgba(59,130,246,0.22);}
.logo-icon::after{content:"";position:absolute;inset:10px;background:var(--surface);border-radius:50%;}
.nav-links{display:flex;gap:24px;font-weight:700;font-size:14px;}
.nav-links a{color:var(--ink-light);}
/* Buttons */
.btn{padding:12px 24px;border-radius:9999px;font-weight:800;font-size:15px;display:inline-flex;align-items:center;justify-content:center;gap:8px;transition:var(--transition);white-space:nowrap;}
.btn-primary{background:var(--primary);color:#fff;box-shadow:var(--shadow-sm);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow);}
.btn-outline{background:transparent;border:2px solid var(--ink-lighter);color:var(--ink);}
.btn-outline:hover{border-color:var(--primary);background:var(--primary);color:#fff;}
/* Hero */
.hero{padding:160px 0 100px;}
.hero-problem{font-size:20px;line-height:1.4;font-weight:700;color:var(--ink-light);margin-bottom:24px;max-width:800px;}
h1{font-size:clamp(36px,8vw,58px);line-height:1.05;font-weight:950;letter-spacing:-2px;margin-bottom:28px;background:linear-gradient(135deg,var(--ink),var(--primary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;}
.hero-benefits{display:flex;flex-direction:column;gap:16px;margin-bottom:32px;}
.benefit{font-size:18px;font-weight:700;color:var(--ink);}
.benefit strong{color:var(--primary);}
.hero-cta-row{display:flex;gap:16px;margin-bottom:32px;flex-wrap:wrap;}
.regulated-badges{display:flex;flex-wrap:wrap;gap:12px;}
.regulated-badges span{padding:8px 16px;border-radius:9999px;font-size:13px;font-weight:700;background:var(--primary-10);color:var(--primary-dark);border:1px solid var(--primary-10);transition:var(--transition);}
.regulated-badges span:hover{transform:translateY(-2px);box-shadow:var(--shadow-sm);}
/* Sections */
.section{padding:100px 0;}
.section-alt{background:var(--surface-2);border-radius:var(--radius-lg);margin:60px 0;padding:100px 0;box-shadow:var(--shadow-sm);border:1px solid var(--primary-10);}
h2{font-size:clamp(32px,6vw,46px);font-weight:950;text-align:center;letter-spacing:-1.8px;background:linear-gradient(135deg,var(--ink),var(--primary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:20px;}
.section-subtitle{font-size:18px;color:var(--ink-lighter);text-align:center;max-width:800px;margin:0 auto 48px;}
/* Proof */
.proof-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px;grid-auto-flow:dense;}
.proof-card{background:var(--surface);border-radius:var(--radius);padding:24px;border:1px solid var(--primary-10);box-shadow:var(--shadow-sm);transition:var(--transition);}
.proof-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);}
.proof-industry{font-size:18px;font-weight:900;color:var(--primary-dark);margin-bottom:8px;}
.proof-card p{font-size:16px;color:var(--ink-light);line-height:1.5;}
.public-product{margin-top:48px;text-align:center;background:var(--surface);border-radius:var(--radius-lg);padding:32px;box-shadow:var(--shadow);border:1px solid var(--primary-10);}
.public-product h3{font-size:24px;font-weight:950;margin-bottom:16px;color:var(--ink);}
.public-product p{font-size:16px;color:var(--ink-light);margin-bottom:12px;}
.public-note{color:var(--ink-lighter);font-size:14px;font-style:italic;}
/* Timeline */
.timeline{display:grid;grid-template-columns:1fr;gap:16px;max-width:800px;margin:0 auto;}
.t-step{display:flex;gap:16px;align-items:center;background:var(--surface);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow-sm);border:1px solid var(--primary-10);transition:var(--transition);}
.t-step:hover{transform:translateY(-4px);box-shadow:var(--shadow);}
.t-num{width:40px;height:40px;border-radius:12px;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:900;font-size:18px;}
.t-step div{font-weight:800;color:var(--ink);}
/* Grid & Cards */
.grid-3{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px;}
.card{background:var(--surface);border-radius:var(--radius);padding:28px;border:1px solid var(--primary-10);box-shadow:var(--shadow-sm);transition:var(--transition);position:relative;}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow);}
.tag{position:absolute;top:20px;right:20px;padding:6px 12px;border-radius:9999px;font-weight:800;font-size:12px;border:1px solid var(--primary-10);background:var(--primary-10);color:var(--primary-dark);}
.card h3{font-size:22px;font-weight:950;margin:16px 0 8px;color:var(--ink);}
.card p{color:var(--ink-light);font-size:16px;}
/* Callout */
.callout{margin-top:40px;background:var(--surface-2);border-radius:var(--radius-lg);padding:24px;text-align:center;box-shadow:var(--shadow-sm);border:1px solid var(--primary-10);}
.callout-title{font-weight:900;color:var(--ink);letter-spacing:-0.3px;}
.callout-text{margin-top:8px;font-weight:800;font-size:18px;color:var(--ink);}
/* Contact */
.contact{text-align:center;}
.contact-options{display:flex;gap:24px;justify-content:center;flex-wrap:wrap;margin-bottom:32px;}
.contact-primary,.contact-secondary{flex:1;min-width:280px;}
.contact-link{font-size:20px;font-weight:900;color:var(--primary);display:block;margin-bottom:8px;}
.contact-link:hover{color:var(--primary-dark);}
.contact-hint{color:var(--ink-lighter);font-size:14px;}
.email-template{background:var(--surface-2);border-radius:var(--radius-lg);padding:24px;box-shadow:var(--shadow-sm);border:1px solid var(--primary-10);}
.email-title{font-weight:900;color:var(--ink);margin-bottom:12px;}
pre{background:var(--surface);border-radius:var(--radius);padding:16px;overflow:auto;font-size:14px;color:var(--ink-light);line-height:1.5;}
.contact-foot{margin-top:32px;display:flex;justify-content:space-between;align-items:center;gap:12px;color:var(--ink-lighter);font-size:14px;}
.legal-links{display:flex;gap:12px;}
.legal-links a{color:var(--ink-lighter);}
/* Theme Toggle */
.theme-toggle{position:fixed;bottom:24px;right:24px;width:48px;height:48px;border-radius:50%;background:var(--surface);border:1px solid var(--primary-10);box-shadow:var(--shadow-lg);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:var(--transition);z-index:2000;color:var(--ink);}
.theme-toggle:hover{transform:scale(1.1);box-shadow:var(--shadow-lg);}
/* Responsive */
@media (max-width:1024px){
  .nav-links{display:none;} /* Add hamburger if needed in prod */
  .hero{padding:140px 0 80px;}
  .section{padding:80px 0;}
  .proof-grid{grid-template-columns:1fr;}
  .timeline{grid-template-columns:1fr;}
  .grid-3{grid-template-columns:1fr;}
  .contact-options{flex-direction:column;}
}
@media (max-width:768px){
  .container{padding:0 16px;}
  h1{font-size:40px;}
  h2{font-size:32px;}
  .hero-problem{font-size:18px;}
  .benefit{font-size:16px;}
}