:root{--primary: #6366f1;--primary-dark: #4f46e5;--secondary: #10b981;--background: #0f172a;--surface: #1e293b;--surface-light: #334155;--text: #f8fafc;--text-muted: #94a3b8;--accent: #f59e0b}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--background);color:var(--text);line-height:1.6}.container{max-width:1200px;margin:0 auto;padding:0 24px}.header{position:fixed;top:0;left:0;right:0;z-index:100;padding:16px 0;background:#0f172ae6;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid rgba(255,255,255,.05)}.header-content{display:flex;justify-content:space-between;align-items:center}.logo{display:flex;align-items:center;gap:10px;font-size:24px;font-weight:700;color:var(--text);text-decoration:none}.logo-icon{width:40px;height:40px;background:linear-gradient(135deg,var(--primary),var(--secondary));border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:20px}.nav{display:flex;gap:32px;align-items:center}.nav a{color:var(--text-muted);text-decoration:none;font-weight:500;transition:color .2s}.nav a:hover{color:var(--text)}.btn{padding:12px 24px;border-radius:8px;font-weight:600;cursor:pointer;transition:all .2s;border:none;font-size:15px;text-decoration:none;display:inline-flex;align-items:center;gap:8px}.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;box-shadow:0 4px 14px #6366f166}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px #6366f180}.btn-secondary{background:transparent;color:var(--text);border:1px solid var(--surface-light)}.btn-secondary:hover{background:var(--surface)}.hero{min-height:100vh;display:flex;align-items:center;padding-top:80px;position:relative;overflow:hidden}.hero:before{content:"";position:absolute;top:-50%;right:-20%;width:800px;height:800px;background:radial-gradient(circle,rgba(99,102,241,.15) 0%,transparent 70%);pointer-events:none}.hero-content{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}.hero-text{max-width:600px}.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;background:var(--surface);border-radius:20px;font-size:13px;color:var(--secondary);margin-bottom:24px;border:1px solid rgba(16,185,129,.2)}.hero h1{font-size:56px;line-height:1.1;font-weight:800;margin-bottom:24px;background:linear-gradient(135deg,var(--text) 0%,var(--text-muted) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hero h1 span{background:linear-gradient(135deg,var(--primary),var(--secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hero p{font-size:20px;color:var(--text-muted);margin-bottom:32px;line-height:1.7}.hero-buttons{display:flex;gap:16px}.hero-demo{background:var(--surface);border-radius:16px;padding:24px;box-shadow:0 25px 50px -12px #00000080;border:1px solid var(--surface-light)}.demo-header{display:flex;align-items:center;gap:12px;margin-bottom:16px;padding-bottom:16px;border-bottom:1px solid var(--surface-light)}.demo-avatar{width:44px;height:44px;background:linear-gradient(135deg,var(--primary),var(--secondary));border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:18px}.demo-info h4{font-size:15px;font-weight:600}.demo-info span{font-size:13px;color:var(--secondary);display:flex;align-items:center;gap:6px}.demo-info span:before{content:"";width:8px;height:8px;background:var(--secondary);border-radius:50%}.demo-messages{display:flex;flex-direction:column;gap:12px}.demo-message{padding:12px 16px;border-radius:12px;max-width:85%;font-size:14px;animation:fadeIn .5s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.demo-message.bot{background:var(--surface-light);align-self:flex-start;border-bottom-left-radius:4px}.demo-message.user{background:var(--primary);align-self:flex-end;border-bottom-right-radius:4px}.features{padding:120px 0}.section-header{text-align:center;max-width:600px;margin:0 auto 60px}.section-header h2{font-size:40px;font-weight:700;margin-bottom:16px}.section-header p{color:var(--text-muted);font-size:18px}.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.feature-card{background:var(--surface);border-radius:16px;padding:32px;border:1px solid var(--surface-light);transition:all .3s}.feature-card:hover{transform:translateY(-5px);border-color:var(--primary);box-shadow:0 20px 40px #6366f126}.feature-icon{width:56px;height:56px;background:linear-gradient(135deg,var(--primary),var(--primary-dark));border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:20px}.feature-card h3{font-size:20px;margin-bottom:12px}.feature-card p{color:var(--text-muted);font-size:15px}.pricing{padding:120px 0;background:linear-gradient(180deg,transparent,rgba(99,102,241,.05))}.pricing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:60px}.pricing-card{background:var(--surface);border-radius:20px;padding:40px;border:1px solid var(--surface-light);transition:all .3s;position:relative}.pricing-card.featured{border-color:var(--primary);transform:scale(1.05);box-shadow:0 25px 50px #6366f133}.pricing-card.featured:before{content:"Most Popular";position:absolute;top:-12px;left:50%;transform:translate(-50%);background:linear-gradient(135deg,var(--primary),var(--primary-dark));padding:6px 16px;border-radius:20px;font-size:12px;font-weight:600}.pricing-card h3{font-size:22px;margin-bottom:8px}.pricing-card .price{font-size:48px;font-weight:800;margin:20px 0}.pricing-card .price span{font-size:18px;font-weight:400;color:var(--text-muted)}.pricing-card .description{color:var(--text-muted);margin-bottom:24px;font-size:15px}.pricing-features{list-style:none;margin-bottom:32px}.pricing-features li{padding:10px 0;display:flex;align-items:center;gap:12px;font-size:15px;color:var(--text-muted)}.pricing-features li:before{content:"✓";color:var(--secondary);font-weight:700}.pricing-card .btn{width:100%;justify-content:center}.cta{padding:120px 0;text-align:center}.cta-box{background:linear-gradient(135deg,var(--primary),var(--primary-dark));border-radius:24px;padding:80px 60px;position:relative;overflow:hidden}.cta-box:before{content:"";position:absolute;top:-100px;right:-100px;width:300px;height:300px;background:#ffffff1a;border-radius:50%}.cta-box h2{font-size:40px;margin-bottom:16px}.cta-box p{font-size:18px;opacity:.9;margin-bottom:32px;max-width:500px;margin-left:auto;margin-right:auto}.cta-box .btn{background:#fff;color:var(--primary)}.footer{padding:60px 0;border-top:1px solid var(--surface-light)}.footer-content{display:flex;justify-content:space-between;align-items:center}.footer-links{display:flex;gap:32px}.footer-links a{color:var(--text-muted);text-decoration:none;font-size:14px}.footer-links a:hover{color:var(--text)}.copyright{color:var(--text-muted);font-size:14px}@media (max-width: 968px){.hero-content{grid-template-columns:1fr;text-align:center}.hero-text{max-width:100%}.hero-buttons{justify-content:center}.hero-demo{max-width:400px;margin:0 auto}.features-grid,.pricing-grid{grid-template-columns:1fr;max-width:400px;margin:0 auto}.pricing-card.featured{transform:none}.hero h1{font-size:40px}}@media (max-width: 640px){.nav{display:none}.hero h1{font-size:32px}.section-header h2{font-size:28px}}.auth-container{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:40px 20px;background:var(--background)}.auth-box{background:var(--surface);border-radius:20px;padding:48px;width:100%;max-width:420px;border:1px solid var(--surface-light);box-shadow:0 25px 50px #0000004d}.auth-logo{display:flex;align-items:center;gap:10px;font-size:24px;font-weight:700;color:var(--text);text-decoration:none;justify-content:center;margin-bottom:32px}.auth-box h1{font-size:28px;text-align:center;margin-bottom:8px}.auth-subtitle{text-align:center;color:var(--text-muted);margin-bottom:32px}.auth-error{background:#ef444426;border:1px solid rgba(239,68,68,.3);color:#f87171;padding:12px 16px;border-radius:8px;margin-bottom:20px;font-size:14px;text-align:center}.auth-form{display:flex;flex-direction:column;gap:20px}.form-group{display:flex;flex-direction:column;gap:8px}.form-group label{font-size:14px;font-weight:500;color:var(--text-muted)}.form-group input,.form-group select{padding:14px 16px;border-radius:10px;border:1px solid var(--surface-light);background:var(--background);color:var(--text);font-size:15px;transition:border-color .2s}.form-group input:focus,.form-group select:focus{outline:none;border-color:var(--primary)}.form-group input::placeholder{color:var(--text-muted)}.btn-full{width:100%;justify-content:center;padding:16px}.btn:disabled{opacity:.6;cursor:not-allowed}.auth-divider{display:flex;align-items:center;gap:16px;margin:24px 0}.auth-divider:before,.auth-divider:after{content:"";flex:1;height:1px;background:var(--surface-light)}.auth-divider span{color:var(--text-muted);font-size:13px}.auth-footer{text-align:center;margin-top:24px;font-size:14px;color:var(--text-muted)}.auth-footer a{color:var(--primary);text-decoration:none;font-weight:500}.auth-footer a:hover{text-decoration:underline}