/* Reset & Base Styles */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        :root {
            --primary-blue: #1e40af;
            --secondary-blue: #3b82f6;
            --light-blue: #dbeafe;
            --dark-gray: #1f2937;
            --medium-gray: #6b7280;
            --light-gray: #f9fafb;
            --white: #ffffff;
            --accent-orange: #f59e0b;
            --success-green: #10b981;
            --border-color: #e5e7eb;
            
            --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
            --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
            --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
            --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
            --radius: 8px;
            --radius-lg: 12px;
        }

        body {
            font-family: var(--font-primary);
            line-height: 1.6;
            color: var(--dark-gray);
            background-color: var(--light-gray);
        }

        /* Header & Navigation */
        .header {
            background: var(--white);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: var(--shadow-sm);
        }

        .nav-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary-blue);
            text-decoration: none;
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: bold;
        }

        .main-nav {
            display: flex;
            gap: 2rem;
            list-style: none;
        }

        .main-nav a {
            color: var(--dark-gray);
            text-decoration: none;
            font-weight: 500;
            padding: 0.5rem 1rem;
            border-radius: var(--radius);
            transition: all 0.2s;
            position: relative;
        }

        .main-nav a:hover {
            background: var(--light-blue);
            color: var(--primary-blue);
        }

        .main-nav a.active {
            background: var(--primary-blue);
            color: white;
        }

        .search-container {
            flex: 1;
            max-width: 400px;
            margin: 0 2rem;
            position: relative;
        }

        .search-input {
            width: 100%;
            padding: 0.75rem 1rem 0.75rem 2.5rem;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            font-size: 0.95rem;
            background: var(--light-gray);
            transition: all 0.2s;
        }

        .search-input:focus {
            outline: none;
            border-color: var(--secondary-blue);
            background: white;
            box-shadow: 0 0 0 3px rgb(59 130 246 / 0.1);
        }

        .search-icon {
            position: absolute;
            left: 0.75rem;
            top: 50%;
            transform: translateY(-50%);
            color: var(--medium-gray);
        }

        .user-menu {
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .notification-bell {
            position: relative;
            padding: 0.5rem;
            color: var(--medium-gray);
            cursor: pointer;
            border-radius: var(--radius);
            transition: all 0.2s;
        }

        .notification-bell:hover {
            background: var(--light-gray);
            color: var(--primary-blue);
        }

        .notification-badge {
            position: absolute;
            top: 0.25rem;
            right: 0.25rem;
            background: var(--accent-orange);
            color: white;
            font-size: 0.7rem;
            padding: 0.15rem 0.4rem;
            border-radius: 10px;
            min-width: 18px;
            text-align: center;
        }

        .user-avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--success-green), #059669);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s;
        }

        .user-avatar:hover {
            transform: scale(1.05);
        }

        /* Main Content */
        .main-content {
            min-height: calc(100vh - 70px);
        }

        /* Landing Page Styles */
        .hero-section {
            background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
            color: white;
            padding: 4rem 1rem;
            text-align: center;
        }

        .hero-container {
            max-width: 1200px;
            margin: 0 auto;
        }

        .hero-title {
            font-size: 3rem;
            font-weight: 700;
            margin-bottom: 1rem;
            line-height: 1.2;
        }

        .hero-subtitle {
            font-size: 1.25rem;
            margin-bottom: 2rem;
            opacity: 0.9;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 3rem;
            margin-top: 3rem;
        }

        .stat-item {
            text-align: center;
        }

        .stat-number {
            font-size: 2.5rem;
            font-weight: 700;
            display: block;
            color: var(--accent-orange);
        }

        .stat-label {
            font-size: 0.9rem;
            opacity: 0.8;
            margin-top: 0.5rem;
        }

        /* Sections Grid */
        .sections-overview {
            padding: 4rem 1rem;
            max-width: 1200px;
            margin: 0 auto;
        }

        .sections-title {
            text-align: center;
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: var(--dark-gray);
        }

        .sections-subtitle {
            text-align: center;
            font-size: 1.1rem;
            color: var(--medium-gray);
            margin-bottom: 3rem;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        .sections-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 2rem;
            margin-bottom: 3rem;
        }

        .section-card {
            background: white;
            border-radius: var(--radius-lg);
            padding: 2rem;
            box-shadow: var(--shadow-md);
            transition: all 0.3s;
            cursor: pointer;
            border: 2px solid transparent;
            text-decoration: none;
            color: inherit;
        }

        .section-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: var(--secondary-blue);
        }

        .section-icon {
            width: 60px;
            height: 60px;
            border-radius: var(--radius-lg);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: white;
            margin-bottom: 1.5rem;
        }

        .section-title {
            font-size: 1.4rem;
            font-weight: 600;
            margin-bottom: 0.75rem;
            color: var(--dark-gray);
        }

        .section-description {
            color: var(--medium-gray);
            margin-bottom: 1.5rem;
            line-height: 1.6;
        }

        .section-features {
            list-style: none;
            margin-bottom: 1.5rem;
        }

        .section-features li {
            padding: 0.25rem 0;
            color: var(--medium-gray);
            font-size: 0.9rem;
        }

        .section-features li:before {
            content: "✓";
            color: var(--success-green);
            font-weight: bold;
            margin-right: 0.5rem;
        }

        .section-cta {
            background: var(--light-blue);
            color: var(--primary-blue);
            padding: 0.75rem 1.5rem;
            border-radius: var(--radius);
            font-weight: 500;
            text-align: center;
            transition: all 0.2s;
        }

        .section-card:hover .section-cta {
            background: var(--primary-blue);
            color: white;
        }

        /* AI Features Section */
        .ai-features {
            background: var(--light-gray);
            padding: 4rem 1rem;
        }

        .ai-container {
            max-width: 1200px;
            margin: 0 auto;
        }

        .ai-title {
            text-align: center;
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 1rem;
            background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .ai-subtitle {
            text-align: center;
            font-size: 1.1rem;
            color: var(--medium-gray);
            margin-bottom: 3rem;
        }

        .ai-features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
        }

        .ai-feature {
            background: white;
            padding: 1.5rem;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            text-align: center;
            transition: all 0.3s;
        }

        .ai-feature:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .ai-feature-icon {
            font-size: 2rem;
            margin-bottom: 1rem;
        }

        .ai-feature-title {
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: var(--dark-gray);
        }

        .ai-feature-desc {
            font-size: 0.9rem;
            color: var(--medium-gray);
        }

        /* Partners Section */
        .partners-section {
            padding: 3rem 1rem;
            background: white;
        }

        .partners-container {
            max-width: 1200px;
            margin: 0 auto;
            text-align: center;
        }

        .partners-title {
            font-size: 1.5rem;
            font-weight: 600;
            margin-bottom: 2rem;
            color: var(--dark-gray);
        }

        .partners-grid {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 3rem;
            flex-wrap: wrap;
        }

        .partner-logo {
            padding: 1rem 2rem;
            background: var(--light-gray);
            border-radius: var(--radius);
            font-weight: 600;
            color: var(--medium-gray);
            transition: all 0.2s;
        }

        .partner-logo.featured {
            background: var(--light-blue);
            color: var(--primary-blue);
            transform: scale(1.1);
        }

        .partner-logo:hover {
            transform: scale(1.05);
        }

        /* Footer */
        .footer {
            background: var(--dark-gray);
            color: white;
            padding: 2rem 1rem;
            margin-top: 2rem;
        }

        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
            text-align: center;
        }

        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }

        .footer-section h4 {
            margin-bottom: 1rem;
            color: var(--light-blue);
        }

        .footer-section a {
            color: #d1d5db;
            text-decoration: none;
            display: block;
            margin-bottom: 0.5rem;
            transition: color 0.2s;
        }

        .footer-section a:hover {
            color: white;
        }

        .footer-bottom {
            border-top: 1px solid #374151;
            padding-top: 1.5rem;
            color: #9ca3af;
        }

        /* Mobile Responsive */
        @media (max-width: 768px) {
            .main-nav {
                display: none;
            }

            .search-container {
                margin: 0 1rem;
                max-width: none;
            }

            .hero-title {
                font-size: 2rem;
            }

            .hero-stats {
                flex-direction: column;
                gap: 1.5rem;
            }

            .sections-grid {
                grid-template-columns: 1fr;
            }

            .ai-features-grid {
                grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            }

            .partners-grid {
                gap: 1.5rem;
            }
        }

        /* AI Assistant Widget */
        .ai-assistant {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            z-index: 1000;
        }

        .ai-toggle {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
            color: white;
            border: none;
            cursor: pointer;
            box-shadow: var(--shadow-lg);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            transition: all 0.3s;
        }

        .ai-toggle:hover {
            transform: scale(1.1);
        }

        .ai-chat {
            position: absolute;
            bottom: 80px;
            right: 0;
            width: 320px;
            height: 400px;
            background: white;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            display: none;
            flex-direction: column;
            overflow: hidden;
        }

        .ai-chat.open {
            display: flex;
        }

        .ai-chat-header {
            background: var(--primary-blue);
            color: white;
            padding: 1rem;
            font-weight: 600;
        }

        .ai-chat-body {
            flex: 1;
            padding: 1rem;
            overflow-y: auto;
        }

        .ai-message {
            background: var(--light-gray);
            padding: 0.75rem;
            border-radius: var(--radius);
            margin-bottom: 0.5rem;
            font-size: 0.9rem;
        }

        .ai-chat-input {
            padding: 1rem;
            border-top: 1px solid var(--border-color);
            display: flex;
            gap: 0.5rem;
        }

        .ai-chat-input input {
            flex: 1;
            padding: 0.5rem;
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
        }

        .ai-chat-input button {
            padding: 0.5rem 1rem;
            background: var(--primary-blue);
            color: white;
            border: none;
            border-radius: var(--radius);
            cursor: pointer;
        }

        /* Loading Animation */
        .loading {
            display: inline-block;
            width: 20px;
            height: 20px;
            border: 3px solid var(--light-gray);
            border-radius: 50%;
            border-top-color: var(--primary-blue);
            animation: spin 1s ease-in-out infinite;
        }

        @keyframes spin {
            to { transform: rotate(360deg); }
        }

        /* Tooltips */
        .tooltip {
            position: relative;
            cursor: help;
        }

        .tooltip:before {
            content: attr(data-tooltip);
            position: absolute;
            bottom: 125%;
            left: 50%;
            transform: translateX(-50%);
            background: var(--dark-gray);
            color: white;
            padding: 0.5rem;
            border-radius: var(--radius);
            font-size: 0.8rem;
            white-space: nowrap;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s;
            z-index: 1000;
        }

        .tooltip:hover:before {
            opacity: 1;
        }