:root{
  --bg:#fafafa;
  --surface:#fff;
  --surface-alt:#f8f9fa;
  --text:#18181b;
  --muted:#71717a;
  --border:#e4e4e7;
  --accent:#6366f1;
  --accent-light:#818cf8;
  --success:#10b981;
  --warning:#f59e0b;
  --error:#ef4444;
  --code-bg:#18181b;
}

body.dark{
  --bg:#09090b;
  --surface:#18181b;
  --surface-alt:#0f0f1a;
  --text:#fafafa;
  --muted:#a1a1aa;
  --border:#27272a;
  --code-bg:#0a0a0a;
}

*{margin:0;padding:0;box-sizing:border-box}
body{
  font-family:Inter,system-ui,sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.6;
  transition:background .3s,color .3s;
}

/* Navbar */
nav{
  position:sticky;
  top:0;
  z-index:100;
  background:var(--bg);
  border-bottom:1px solid var(--border);
  backdrop-filter:blur(10px);
}

.nav-container{
  max-width:1200px;
  margin:0 auto;
  padding:16px 32px;
  display:flex;
  justify-content:space-between;
  align-items:center;
}

.logo{
  display:flex;
  align-items:center;
  gap:12px;
  font-weight:600;
  font-size:18px;
  color:var(--text);
  text-decoration:none;
}

.logo-icon{
  width:32px;
  height:32px;
  position:relative;
  display:grid;
  place-items:center;
}

.logo-svg{width:100%;height:100%}
.logo-ring{transform-origin:center;animation:ringPulse 2.5s ease-in-out infinite}
.logo-ring:nth-child(1){animation-delay:0s}
.logo-ring:nth-child(2){animation-delay:.3s}

@keyframes ringPulse{
  0%,100%{opacity:.4}
  50%{opacity:.8}
}

.logo-hand{animation:handGlow 2.5s ease-in-out infinite}

.logo-center{
  animation:centerPulse 2s ease-in-out infinite;
  transform-origin:center;
}

@keyframes handGlow{
  0%,100%{opacity:.8}
  50%{opacity:1}
}

@keyframes centerPulse{
  0%,100%{transform:scale(1);opacity:.9}
  50%{transform:scale(1.15);opacity:1}
}

.nav-links{
  display:flex;
  align-items:center;
  gap:32px;
}

.nav-link{
  color:var(--muted);
  text-decoration:none;
  font-size:15px;
  font-weight:500;
  transition:color .2s;
}
.nav-link:hover{color:var(--text)}

.nav-actions{display:flex;align-items:center;gap:16px}

/* API Status Badge */
.status-badge{
  display:flex;
  align-items:center;
  gap:8px;
  padding:6px 12px;
  border:1px solid var(--border);
  border-radius:8px;
  font-size:13px;
  background:var(--surface);
}

.status-dot{
  width:6px;
  height:6px;
  background:var(--success);
  border-radius:50%;
  animation:pulse 2s infinite;
}

@keyframes pulse{
  0%,100%{opacity:1;transform:scale(1)}
  50%{opacity:.6;transform:scale(1.3)}
}

.theme-btn{
  width:40px;
  height:40px;
  border:1px solid var(--border);
  border-radius:10px;
  background:var(--surface);
  cursor:pointer;
  display:grid;
  place-items:center;
  position:relative;
  overflow:hidden;
  transition:all .3s cubic-bezier(.4,0,.2,1);
}
.theme-btn:hover{border-color:var(--accent);transform:scale(1.08)}

.theme-icon{width:20px;height:20px;position:relative;transition:transform .5s cubic-bezier(.4,0,.2,1)}
.sun-icon{width:14px;height:14px;background:var(--text);border-radius:50%;position:relative}
.sun-icon::before{
  content:'';
  position:absolute;
  inset:-6px;
  border-radius:50%;
  background:radial-gradient(circle,transparent 50%,var(--text) 50%,var(--text) 55%,transparent 55%);
  animation:sunRotate 8s linear infinite;
}
@keyframes sunRotate{to{transform:rotate(360deg)}}

.moon-icon{
  width:16px;height:16px;background:var(--text);border-radius:50%;position:relative;
  box-shadow:inset -4px -2px 0 0 var(--bg);
}
body.dark .theme-icon{transform:rotate(180deg)}

.btn-primary{
  padding:10px 20px;border:none;border-radius:10px;background:var(--text);color:var(--bg);
  font-weight:600;font-size:14px;cursor:pointer;transition:all .2s;text-decoration:none;display:inline-block;
}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 4px 12px rgba(0,0,0,.15)}

/* Mobile */
.mobile-toggle{
  display:none;width:40px;height:40px;border:1px solid var(--border);border-radius:10px;background:var(--surface);
  cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:5px;transition:all .2s;
}
.mobile-toggle:hover{border-color:var(--accent)}
.mobile-toggle span{width:18px;height:2px;background:var(--text);border-radius:2px;transition:all .3s cubic-bezier(.4,0,.2,1)}
.mobile-toggle.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.mobile-toggle.active span:nth-child(2){opacity:0;transform:translateX(-10px)}
.mobile-toggle.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

.mobile-menu{display:none;background:var(--surface);border-bottom:1px solid var(--border);padding:24px 32px;animation:slideDown .3s ease}
@keyframes slideDown{from{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}
.mobile-menu.open{display:block}
.mobile-links{display:flex;flex-direction:column;gap:16px}

/* Hero */
.hero{max-width:1200px;margin:0 auto;padding:120px 32px 80px;text-align:center}

.badge{
  display:inline-flex;align-items:center;gap:8px;padding:6px 12px;border:1px solid var(--border);
  border-radius:100px;font-size:13px;font-weight:500;color:var(--muted);margin-bottom:24px;
}

h1{
  font-size:clamp(40px,6vw,64px);font-weight:700;letter-spacing:-.02em;line-height:1.1;margin-bottom:24px;
  max-width:900px;margin-left:auto;margin-right:auto;
}

.gradient-text{
  background:linear-gradient(135deg,var(--accent),var(--accent-light));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}

.lead{font-size:20px;color:var(--muted);max-width:700px;margin:0 auto 40px}

.hero-form{display:flex;gap:12px;max-width:500px;margin:0 auto 16px}

.input{
  flex:1;padding:14px 20px;border:1px solid var(--border);border-radius:10px;background:var(--surface);
  color:var(--text);font-size:15px;font-family:inherit;transition:all .2s;
}
.input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(99,102,241,.1)}

.btn{
  padding:14px 28px;border:none;border-radius:10px;background:var(--text);color:var(--bg);
  font-weight:600;font-size:15px;cursor:pointer;transition:all .2s;
}
.btn:hover{transform:translateY(-1px);box-shadow:0 4px 12px rgba(0,0,0,.15)}

.success{
  display:none;padding:12px 20px;border-radius:10px;background:var(--success);color:#fff;font-size:14px;font-weight:500;
  margin:16px auto 0;max-width:500px;
}

.note{font-size:14px;color:var(--muted);margin-top:12px}

/* Live Demo Section */
.live-demo-section{background:var(--surface-alt);border-top:1px solid var(--border);border-bottom:1px solid var(--border);padding:80px 32px}
.container{max-width:1200px;margin:0 auto}

h2{font-size:clamp(32px,4vw,42px);font-weight:700;margin-bottom:16px}
.section-lead{font-size:18px;color:var(--muted);margin-bottom:40px}

.demo-widget{
  background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:32px;margin-top:32px;
}

.webcam-container{
  aspect-ratio:16/9;background:#000;border-radius:12px;position:relative;overflow:hidden;margin-bottom:24px;
}
.webcam-placeholder{display:grid;place-items:center;height:100%;color:#fff;font-size:18px}

.demo-controls{display:flex;gap:12px;margin-bottom:24px}

.recognition-output{
  padding:20px;border:1px solid var(--border);border-radius:12px;background:var(--code-bg);color:#e4e4e7;
  font-family:'JetBrains Mono',monospace;font-size:14px;min-height:100px;
}

/* SDK Section */
.sdk-section{max-width:1200px;margin:0 auto;padding:80px 32px}
.sdk-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px;margin-top:32px}
.sdk-card{
  padding:24px;border:1px solid var(--border);border-radius:12px;background:var(--surface);transition:all .2s;
}
.sdk-card:hover{border-color:var(--accent);transform:translateY(-2px)}
.sdk-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.sdk-icon{
  width:40px;height:40px;border-radius:10px;display:grid;place-items:center;font-size:24px;background:rgba(99,102,241,.1);
}
.install-cmd{
  background:var(--code-bg);padding:12px 16px;border-radius:8px;font-family:'JetBrains Mono',monospace;font-size:13px;color:#e4e4e7;margin-top:12px;
}

/* Pricing Calculator */
.pricing-section{background:var(--surface-alt);border-top:1px solid var(--border);border-bottom:1px solid var(--border);padding:80px 32px}
.pricing-calculator{
  max-width:600px;margin:40px auto 0;padding:32px;border:1px solid var(--border);border-radius:16px;background:var(--surface);
}
.calc-input{margin-bottom:24px}
.calc-input label{display:block;font-weight:600;margin-bottom:8px}

.slider{width:100%;height:6px;border-radius:3px;background:var(--border);outline:none;-webkit-appearance:none}
.slider::-webkit-slider-thumb{-webkit-appearance:none;width:20px;height:20px;border-radius:50%;background:var(--accent);cursor:pointer}

.calc-result{padding:20px;border-radius:12px;background:var(--bg);text-align:center}
.price-display{font-size:48px;font-weight:700;color:var(--accent);margin-bottom:8px}

/* Feature Icons */
.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:32px;margin-top:48px}
.feature{
  padding:32px;border:1px solid var(--border);border-radius:12px;background:var(--surface);transition:all .2s;position:relative;
}
.feature:hover{border-color:var(--accent);transform:translateY(-4px);box-shadow:0 8px 24px rgba(0,0,0,.08)}
.feature-icon{
  width:56px;height:56px;border-radius:14px;display:grid;place-items:center;font-size:28px;margin-bottom:20px;position:relative;
}
.feature-icon::before{
  content:'';position:absolute;inset:0;border-radius:14px;background:linear-gradient(135deg,rgba(99,102,241,.15),rgba(129,140,248,.1));
}
.feature h3{font-size:18px;font-weight:600;margin-bottom:12px}
.feature p{font-size:15px;color:var(--muted)}

/* Responsive */
@media (max-width:768px){
  .nav-links,.nav-actions .btn-primary,.status-badge{display:none}
  .mobile-toggle{display:flex}
  .hero{padding:80px 24px 60px}
  .hero-form{flex-direction:column}
  .demo-controls{flex-direction:column}
  footer > div > div:first-child{grid-template-columns:1fr!important;gap:32px!important;}
}