*{margin:0;padding:0;box-sizing:border-box}:root{--primary-color: #52b1ff;--primary-dark: #3a9aef;--secondary-color: #8b949e;--accent-color: #12e19f;--background-color: #0d1117;--surface-color: #161b22;--card-color: #21262d;--text-primary: #f0f6fc;--text-secondary: #8b949e;--border-color: #30363d;--shadow: 0 4px 6px -1px rgba(0, 0, 0, .3);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .4);--shadow-glow: 0 0 20px rgba(82, 177, 255, .3);--shadow-glow-green: 0 0 20px rgba(0, 191, 99, .3);--border-radius: 8px;--border-radius-lg: 12px;--transition: all .3s ease;--gradient-primary: linear-gradient(135deg, #239cff 0%, #3bc89b 100%);--gradient-dark: linear-gradient(135deg, #161b22 0%, #0d1117 100%);--gradient-card: linear-gradient(135deg, #21262d 0%, #161b22 100%)}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe 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a:hover{color:var(--primary-color)}.nav-toggle{display:none;flex-direction:column;cursor:pointer;gap:4px}.nav-toggle span{width:25px;height:3px;background:var(--text-primary);transition:var(--transition)}.btn{display:inline-flex;align-items:center;justify-content:center;padding:.75rem 1.5rem;border:none;border-radius:var(--border-radius);font-weight:600;text-decoration:none;cursor:pointer;transition:var(--transition);font-size:.95rem;gap:.5rem}.btn-primary{background:var(--gradient-primary);color:#fff}.btn-primary:hover{background:var(--gradient-primary);transform:translateY(-2px);box-shadow:var(--shadow-glow)}.btn-secondary{background:transparent;color:var(--accent-color);border:2px solid var(--accent-color)}.btn-secondary:hover{background:var(--accent-color);color:#fff;transform:translateY(-2px)}.btn-large{padding:1rem 2rem;font-size:1.1rem}.btn-full{width:100%}.hero{padding:120px 0 80px;background:var(--gradient-dark);min-height:100vh;display:flex;align-items:center;position:relative;overflow:hidden}.hero:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:radial-gradient(ellipse at center,rgba(82,177,255,.1) 0%,transparent 70%);pointer-events:none}.hero .container{display:grid;grid-template-columns:1fr 1fr;gap:4rem;align-items:center}.hero-title{font-size:3.5rem;font-weight:800;line-height:1.1;margin-bottom:1.5rem;background:linear-gradient(135deg,var(--primary-color),var(--accent-color));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hero-subtitle{font-size:1.25rem;color:var(--text-secondary);margin-bottom:2rem;line-height:1.6}.hero-buttons{display:flex;gap:1rem;flex-wrap:wrap}.dashboard-mockup{background:var(--gradient-card);border-radius:var(--border-radius-lg);box-shadow:var(--shadow-glow);overflow:hidden;transform:perspective(1000px) rotateY(-5deg) 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var(--primary-color)}.chat-avatar{font-size:1.5rem;width:40px;height:40px;display:flex;align-items:center;justify-content:center;background:var(--surface-color);border-radius:50%}.chat-info{flex:1}.chat-name{font-weight:600;font-size:.9rem;margin-bottom:.25rem}.chat-message{color:var(--text-secondary);font-size:.8rem}.chat-status{width:8px;height:8px;border-radius:50%;background:var(--border-color)}.chat-status.online{background:var(--accent-color)}.section-header{text-align:center;margin-bottom:4rem}.section-header h2{font-size:2.5rem;font-weight:700;margin-bottom:1rem;color:var(--text-primary)}.section-header p{font-size:1.4rem;color:var(--text-secondary);max-width:600px;margin:0 auto}.features{padding:80px 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