* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        :root {
            --primary-color: #2563eb;
            --secondary-color: #7c3aed;
            --accent-color: #0ea5e9;
            --success-color: #10b981;
            --warning-color: #f59e0b;
            --danger-color: #ef4444;
            --text-dark: #1f2937;
            --text-light: #6b7280;
            --bg-light: #f9fafb;
            --bg-white: #ffffff;
            --gradient: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
        }
        
        [data-theme="dark"] {
            --primary-color: #60a5fa;
            --secondary-color: #a855f7;
            --accent-color: #38bdf8;
            --text-dark: #f9fafb;
            --text-light: #d1d5db;
            --bg-light: #111827;
            --bg-white: #1f2937;
            --gradient: linear-gradient(135deg, #1d4ed8 0%, #7c3aed 100%);
        }
        
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            line-height: 1.6;
            color: var(--text-dark);
            background-color: var(--bg-light);
            transition: background-color 0.3s ease, color 0.3s ease;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        /* Header */
        header {
            background: var(--bg-white);
            box-shadow: 0 1px 3px rgba(0,0,0,0.1);
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
        }
        
        nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 0;
        }
        
        .logo {
            font-size: 1.5rem;
            font-weight: bold;
            color: var(--primary-color);
            text-decoration: none;
        }
        
        .nav-links {
            display: flex;
            gap: 2rem;
            list-style: none;
        }
        
        .nav-links a {
            color: var(--text-dark);
            text-decoration: none;
            transition: color 0.3s;
        }
        
        .nav-links a:hover {
            color: var(--primary-color);
        }
        
        .dark-mode-toggle {
            background: none;
            border: 1px solid var(--text-light);
            color: var(--text-dark);
            cursor: pointer;
            font-size: 1.2rem;
            transition: color 0.3s, border-color 0.3s;
            padding: 0.5rem 1rem;
            border-radius: 0.5rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        
        .dark-mode-toggle:hover {
            color: var(--primary-color);
            background: rgba(59, 130, 246, 0.1);
        }
        
        /* Hero Section */
        .hero {
            background: var(--gradient);
            color: white;
            padding: 100px 0 80px;
            text-align: center;
        }
        
        .hero h1 {
            font-size: 3.5rem;
            margin-bottom: 1rem;
            animation: fadeInUp 0.8s ease;
        }
        
        .hero p {
            font-size: 1.25rem;
            margin-bottom: 2rem;
            opacity: 0.9;
            animation: fadeInUp 0.8s ease 0.2s both;
        }
        
        .cta-button {
            display: inline-block;
            padding: 12px 30px;
            background: var(--bg-white);
            color: var(--primary-color);
            text-decoration: none;
            border-radius: 5px;
            font-weight: 600;
            transition: transform 0.3s, box-shadow 0.3s;
            animation: fadeInUp 0.8s ease 0.4s both;
        }
        
        .cta-button:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }
        
        /* Features Section */
        .features {
            padding: 80px 0;
            background: var(--bg-light);
        }
        
        .section-title {
            text-align: center;
            font-size: 2.5rem;
            margin-bottom: 3rem;
            color: var(--text-dark);
        }
        
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }
        
        .feature-card {
            background: var(--bg-white);
            padding: 2rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
            transition: transform 0.3s;
        }
        
        .feature-card:hover {
            transform: translateY(-5px);
        }
        
        .feature-icon {
            font-size: 3rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        
        .feature-card h3 {
            font-size: 1.5rem;
            margin-bottom: 1rem;
            color: var(--text-dark);
        }
        
        .feature-card p {
            color: var(--text-light);
            line-height: 1.8;
            margin-bottom: 1.5rem;
            flex-grow: 1;
        }
        
        .feature-link {
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            transition: all 0.3s;
        }
        
        .feature-link:hover {
            color: var(--secondary-color);
            transform: translateX(5px);
        }
        
        /* Architecture Section */
        .architecture {
            padding: 80px 0;
            background: var(--bg-white);
        }
        
        /* Header styles matching Exchange */
        .gradient-bg {
            background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
        }
        
        .nav-button {
            background: transparent !important;
            color: white !important;
            padding: 0.5rem 0.75rem;
            border-radius: 0.5rem;
            font-weight: 500;
            transition: all 0.2s ease;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
        }
        
        .nav-button:hover {
            background: rgba(59, 130, 246, 0.1) !important;
            color: var(--primary-color) !important;
        }
        
        .nav-button:focus {
            outline: none;
            box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.3);
        }
        
        .architecture-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-top: 3rem;
        }
        
        .arch-component {
            text-align: center;
            padding: 1.5rem;
            border: 2px solid var(--text-light);
            border-radius: 10px;
            background: var(--bg-white);
            transition: border-color 0.3s;
        }
        
        .arch-component:hover {
            border-color: var(--primary-color);
        }
        
        .arch-component i {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        
        /* Stats Section */
        .stats {
            padding: 60px 0;
            background: var(--gradient);
            color: white;
        }
        
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 2rem;
            text-align: center;
        }
        
        .stat-item h3 {
            font-size: 2.5rem;
            margin-bottom: 0.5rem;
        }
        
        .stat-item p {
            font-size: 1.1rem;
            opacity: 0.9;
        }
        
        /* Documentation Section */
        .documentation {
            padding: 80px 0;
            background: var(--bg-light);
        }
        
        .section-subtitle {
            text-align: center;
            font-size: 1.2rem;
            color: var(--text-light);
            margin-bottom: 3rem;
        }
        
        .docs-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin-bottom: 3rem;
        }
        
        .doc-card {
            background: var(--bg-white);
            padding: 2.5rem;
            border-radius: 15px;
            text-align: center;
            box-shadow: 0 4px 20px rgba(0,0,0,0.08);
            transition: all 0.3s;
            position: relative;
            overflow: hidden;
        }
        
        .doc-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
        }
        
        .doc-card:nth-child(1)::before {
            background: var(--primary-color);
        }
        
        .doc-card:nth-child(2)::before {
            background: var(--success-color);
        }
        
        .doc-card:nth-child(3)::before {
            background: var(--warning-color);
        }
        
        .doc-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 8px 30px rgba(0,0,0,0.12);
        }
        
        .doc-icon {
            width: 70px;
            height: 70px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            color: white;
            margin: 0 auto 1.5rem;
        }
        
        .doc-card:nth-child(1) .doc-icon {
            background: var(--primary-color);
        }
        
        .doc-card:nth-child(2) .doc-icon {
            background: var(--success-color);
        }
        
        .doc-card:nth-child(3) .doc-icon {
            background: var(--warning-color);
        }
        
        .doc-card h3 {
            font-size: 1.5rem;
            margin-bottom: 1rem;
            color: var(--text-dark);
        }
        
        .doc-card p {
            color: var(--text-light);
            margin-bottom: 2rem;
        }
        
        .doc-link {
            gap: 0.5rem;
            color: var(--text-dark);
            text-decoration: none;
            font-weight: 600;
            transition: all 0.3s;
        }
        
        .doc-card:nth-child(1) .doc-link:hover {
            color: var(--primary-color);
        }
        
        .doc-card:nth-child(2) .doc-link:hover {
            color: var(--success-color);
        }
        
        .doc-card:nth-child(3) .doc-link:hover {
            color: var(--warning-color);
        }
        
        .docs-cta {
            text-align: center;
        }
        
        /* Roadmap Section */
        .roadmap {
            padding: 80px 0;
            background: var(--bg-light);
        }
        
        .roadmap-timeline {
            max-width: 800px;
            margin: 0 auto;
            position: relative;
        }
        
        .roadmap-item {
            display: flex;
            margin-bottom: 3rem;
            position: relative;
        }
        
        .roadmap-item::before {
            content: '';
            position: absolute;
            left: 20px;
            top: 30px;
            bottom: -30px;
            width: 2px;
            background: var(--primary-color);
        }
        
        .roadmap-item:last-child::before {
            display: none;
        }
        
        .roadmap-marker {
            width: 40px;
            height: 40px;
            background: var(--primary-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: bold;
            margin-right: 2rem;
            flex-shrink: 0;
        }
        
        .roadmap-content {
            background: var(--bg-white);
            padding: 1.5rem;
            border-radius: 10px;
            box-shadow: 0 3px 10px rgba(0,0,0,0.1);
            flex-grow: 1;
        }
        
        .roadmap-content h4 {
            color: var(--primary-color);
            margin-bottom: 0.5rem;
        }
        
        /* Footer */
        footer {
            background: var(--text-dark);
            color: white;
            padding: 40px 0;
            text-align: center;
        }
        
        .footer-links {
            display: flex;
            justify-content: center;
            gap: 2rem;
            margin-bottom: 2rem;
        }
        
        .footer-links a {
            color: white;
            text-decoration: none;
            transition: color 0.3s;
        }
        
        .footer-links a:hover {
            color: var(--accent-color);
        }
        
        /* Animations */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        /* Responsive */
        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            
            .hero h1 {
                font-size: 2.5rem;
            }
            
            .features-grid {
                grid-template-columns: 1fr;
            }
        }
