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

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
            line-height: 1.6;
            background: #f8fafc;
            min-height: 100vh;
            color: #334155;
        }

        /* Floating Particles */
        #particles {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -1;
            pointer-events: none;
        }

        .particle {
            position: absolute;
            background: rgba(59, 130, 246, 0.1);
            border-radius: 50%;
            animation: float 20s infinite linear;
        }

        @keyframes float {
            0% { transform: translateY(100vh) rotate(0deg); opacity: 0; }
            10% { opacity: 1; }
            90% { opacity: 1; }
            100% { transform: translateY(-100px) rotate(360deg); opacity: 0; }
        }

        /* Navigation */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid #e2e8f0;
            z-index: 1000;
            padding: 1rem 0;
            transition: all 0.3s ease;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
        }

        .nav-container {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0 2rem;
        }

        .logo img {
            height: 40px;
            width: auto;
        }

        .nav-links {
            display: flex;
            gap: 2rem;
            align-items: center;
        }

        .nav-link {
            color: #64748b;
            text-decoration: none;
            font-weight: 500;
            padding: 0.5rem 1rem;
            border-radius: 8px;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            position: relative;
        }

        .nav-link:hover {
            color: #3b82f6;
            background: rgba(59, 130, 246, 0.1);
        }

        .nav-link.tools {
            color: #3b82f6;
            background: rgba(59, 130, 246, 0.1);
            font-weight: 600;
        }

        .nav-link.tools:hover {
            background: rgba(59, 130, 246, 0.15);
            transform: translateY(-1px);
        }

        /* Resi Navigation Button Styling */
        .nav-link.resi {
            color: #1e40af;
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(29, 78, 216, 0.05));
            font-weight: 600;
            border: 1px solid rgba(59, 130, 246, 0.2);
            position: relative;
            overflow: hidden;
        }

        .nav-link.resi::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
            transition: left 0.5s ease;
        }

        .nav-link.resi:hover::before {
            left: 100%;
        }

        .nav-link.resi:hover {
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.15), rgba(29, 78, 216, 0.1));
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(59, 130, 246, 0.2);
            border-color: #3b82f6;
        }

        .nav-link.resi i {
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0%, 100% { transform: scale(1); }
            50% { transform: scale(1.1); }
        }

        /* Main Content */
        .main-content {
            margin-top: 80px;
            min-height: calc(100vh - 80px);
        }

        /* Container */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
        }

        /* Chatbot Styles */
        .chatbot-container {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            z-index: 1000;
        }

        .chatbot-toggle {
            width: 60px;
            height: 60px;
            background: #3b82f6;
            border: none;
            border-radius: 50%;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
            box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
            transition: all 0.3s ease;
        }

        .chatbot-toggle:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(59, 130, 246, 0.4);
            background: #2563eb;
        }

        .chatbot-widget {
            position: absolute;
            bottom: 80px;
            right: 0;
            width: 350px;
            height: 500px;
            background: white;
            border-radius: 16px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
            display: none;
            flex-direction: column;
            overflow: hidden;
        }

        .chatbot-widget.active {
            display: flex;
        }

        .chatbot-header {
            background: #3b82f6;
            color: white;
            padding: 1rem;
            text-align: center;
            font-weight: 600;
        }

        .chatbot-messages {
            flex: 1;
            padding: 1rem;
            overflow-y: auto;
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        .message {
            max-width: 80%;
            padding: 0.75rem 1rem;
            border-radius: 12px;
            font-size: 0.9rem;
        }

        .message.user {
            background: #3b82f6;
            color: white;
            align-self: flex-end;
            border-bottom-right-radius: 4px;
        }

        .message.bot {
            background: #f1f5f9;
            color: #334155;
            align-self: flex-start;
            border-bottom-left-radius: 4px;
        }

        .chatbot-input {
            display: flex;
            padding: 1rem;
            border-top: 1px solid #e2e8f0;
        }

        .chatbot-input input {
            flex: 1;
            border: 1px solid #e2e8f0;
            border-radius: 8px;
            padding: 0.75rem;
            font-size: 0.9rem;
            outline: none;
        }

        .chatbot-input input:focus {
            border-color: #3b82f6;
        }

        .chatbot-input button {
            background: #3b82f6;
            color: white;
            border: none;
            border-radius: 8px;
            padding: 0.75rem 1rem;
            margin-left: 0.5rem;
            cursor: pointer;
            transition: background 0.3s ease;
        }

        .chatbot-input button:hover {
            background: #2563eb;
        }

        /* Utility Classes */
        .text-center { text-align: center; }
        .mt-2 { margin-top: 1rem; }
        .mb-2 { margin-bottom: 1rem; }
        .p-2 { padding: 1rem; }

        /* Responsive */
        @media (max-width: 768px) {
            .nav-container {
                padding: 0 1rem;
            }

            .nav-links {
                gap: 1rem;
            }

            .nav-link {
                padding: 0.5rem;
                font-size: 0.9rem;
            }

            .nav-link.tools::after,
            .nav-link.resi::before {
                display: none;
            }

            .container {
                padding: 0 1rem;
            }

            .chatbot-widget {
                width: 300px;
                height: 400px;
            }

            .chatbot-container {
                bottom: 1rem;
                right: 1rem;
            }
        }