:root {
            --primary-color: #4361ee;
            --primary-dark: #3a56d4;
            --secondary-color: #3f37c9;
            --accent-color: #4895ef;
            --light-color: #f8f9fa;
            --dark-color: #212529;
            --success-color: #4cc9f0;
            --danger-color: #f72585;
            --warning-color: #f8961e;
            --text-color: #2b2d42;
            --text-light: #8d99ae;
            --border-radius: 12px;
            --box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Poppins', sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            overflow-x: hidden;
        }
        
        /* Navigation */
        .navbar {
            padding: 20px 0;
            transition: var(--transition);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        }
        
        .navbar.scrolled {
            padding: 10px 0;
            background-color: white !important;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
        }
        
        .navbar-brand {
            font-weight: 700;
            font-size: 24px;
            color: var(--primary-color) !important;
        }
        
        .nav-link {
            font-weight: 500;
            padding: 8px 15px !important;
            margin: 0 5px;
            color: var(--text-color) !important;
            transition: var(--transition);
        }
        
        .nav-link:hover {
            color: var(--primary-color) !important;
        }
        
        .nav-link.active {
            color: var(--primary-color) !important;
            font-weight: 600;
        }
        
        .btn-nav {
            background-color: var(--primary-color);
            color: white !important;
            border-radius: var(--border-radius);
            padding: 8px 20px !important;
            font-weight: 500;
            transition: var(--transition);
        }
        
        .btn-nav:hover {
            background-color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(67, 97, 238, 0.3);
        }
        
        /* Hero Section */
        .hero-section {
            background: linear-gradient(135deg, rgba(67, 97, 238, 0.9), rgba(63, 55, 201, 0.9)), url('images/invoice-hero.jpg') no-repeat center center/cover;
            color: white;
            padding: 180px 0 150px;
            position: relative;
            overflow: hidden;
        }
        
        .hero-content {
            max-width: 700px;
            margin: 0 auto;
            text-align: center;
        }
        
        .hero-title {
            font-size: 3.5rem;
            font-weight: 700;
            margin-bottom: 20px;
            line-height: 1.2;
        }
        
        .hero-subtitle {
            font-size: 1.25rem;
            margin-bottom: 30px;
            opacity: 0.9;
        }
        
        .btn-hero {
            background-color: white;
            color: var(--primary-color);
            border: none;
            padding: 12px 30px;
            font-size: 1.1rem;
            font-weight: 600;
            border-radius: var(--border-radius);
            transition: var(--transition);
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
        }
        
        .btn-hero:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
            color: var(--primary-color);
        }
        
        /* Problem/Solution Sections */
        .image-section {
            padding: 100px 0;
        }
        
        .image-section h2 {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 20px;
            color: var(--text-color);
        }
        
        .image-section p.lead {
            font-size: 1.2rem;
            color: var(--text-light);
            margin-bottom: 30px;
        }
        
        .img-container {
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--box-shadow);
            transition: var(--transition);
        }
        
        .img-container:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
        }
        
        .img-container img {
            width: 100%;
            height: auto;
            display: block;
        }
        
        /* Features Section */
        .features-section {
            padding: 100px 0;
            background-color: #f9fafd;
        }
        
        .section-title {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 15px;
            text-align: center;
            color: var(--text-color);
        }
        
        .section-subtitle {
            font-size: 1.2rem;
            color: var(--text-light);
            text-align: center;
            max-width: 700px;
            margin: 0 auto 60px;
        }
        
        .feature-card {
            background-color: white;
            border-radius: var(--border-radius);
            padding: 40px 30px;
            height: 100%;
            transition: var(--transition);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            border: 1px solid rgba(0, 0, 0, 0.03);
            text-align: center;
        }
        
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: var(--box-shadow);
        }
        
        .feature-icon {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 20px;
        }
        
        .feature-card h4 {
            font-weight: 600;
            margin-bottom: 15px;
            color: var(--text-color);
        }
        
        .feature-card p {
            color: var(--text-light);
        }
        
        /* Testimonials */
        .testimonials-section {
            padding: 100px 0;
            background-color: white;
        }
        
        .testimonial-card {
            background-color: white;
            border-radius: var(--border-radius);
            padding: 30px;
            box-shadow: var(--box-shadow);
            height: 100%;
            position: relative;
        }
        
        .testimonial-card:before {
            content: '"';
            font-size: 80px;
            color: rgba(67, 97, 238, 0.1);
            position: absolute;
            top: 10px;
            left: 20px;
            font-family: serif;
        }
        
        .testimonial-card h5 {
            font-weight: 600;
            margin-top: 20px;
        }
        
        .testimonial-card p {
            font-style: italic;
            color: var(--text-light);
        }
        
        /* Pricing */
        .pricing-section {
            padding: 100px 0;
            background-color: #f9fafd;
        }
        
        .pricing-card {
            background-color: white;
            border-radius: var(--border-radius);
            padding: 40px 30px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: var(--transition);
            height: 100%;
            position: relative;
            overflow: hidden;
            border: 1px solid rgba(0, 0, 0, 0.03);
        }
        
        .pricing-card:hover {
            transform: translateY(-10px);
            box-shadow: var(--box-shadow);
        }
        
        .pricing-card h5 {
            font-weight: 600;
            font-size: 1.5rem;
            margin-bottom: 10px;
        }
        
        .pricing-card .price {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--primary-color);
            margin: 20px 0;
        }
        
        .pricing-card .price span {
            font-size: 1rem;
            color: var(--text-light);
        }
        
        .pricing-card ul {
            list-style: none;
            margin: 30px 0;
        }
        
        .pricing-card ul li {
            padding: 8px 0;
            color: var(--text-light);
        }
        
        .pricing-card ul li:before {
            content: "\f00c";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            color: var(--primary-color);
            margin-right: 10px;
        }
        
        .pricing-card .btn {
            width: 100%;
            padding: 12px;
            font-weight: 500;
        }
        
        /* FAQ */
        .faq-section {
            padding: 100px 0;
            background-color: white;
        }
        
        .faq-item {
            margin-bottom: 15px;
        }
        
        .faq-item .card {
            border: none;
            border-radius: var(--border-radius);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            overflow: hidden;
        }
        
        .faq-item .card-header {
            background-color: white;
            border: none;
            padding: 20px;
            cursor: pointer;
        }
        
        .faq-item .card-header h5 {
            font-weight: 500;
            margin: 0;
            position: relative;
        }
        
        .faq-item .card-header h5:after {
            content: "\f078";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            position: absolute;
            right: 0;
            transition: var(--transition);
        }
        
        .faq-item .card-header.collapsed h5:after {
            transform: rotate(-180deg);
        }
        
        .faq-item .card-body {
            padding: 20px;
            color: var(--text-light);
        }
        
        /* CTA Section */
        .cta-section {
            padding: 100px 0;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
            text-align: center;
        }
        
        .cta-section h2 {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 20px;
        }
        
        .cta-section p {
            font-size: 1.2rem;
            opacity: 0.9;
            margin-bottom: 30px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }
        
        .btn-cta {
            background-color: white;
            color: var(--primary-color);
            border: none;
            padding: 15px 40px;
            font-size: 1.1rem;
            font-weight: 600;
            border-radius: var(--border-radius);
            transition: var(--transition);
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
        }
        
        .btn-cta:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
            color: var(--primary-color);
        }
        
        /* Footer */
        .footer {
            background-color: var(--dark-color);
            color: white;
            padding: 60px 0 30px;
        }
        
        .footer-links {
            list-style: none;
            padding: 0;
        }
        
        .footer-links li {
            margin-bottom: 10px;
        }
        
        .footer-links a {
            color: rgba(255, 255, 255, 0.7);
            text-decoration: none;
            transition: var(--transition);
        }
        
        .footer-links a:hover {
            color: white;
        }
        
        .social-icons a {
            display: inline-block;
            width: 40px;
            height: 40px;
            background-color: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            text-align: center;
            line-height: 40px;
            color: white;
            margin-right: 10px;
            transition: var(--transition);
        }
        
        .social-icons a:hover {
            background-color: var(--primary-color);
            transform: translateY(-3px);
        }
        
        .copyright {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 30px;
            margin-top: 30px;
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.9rem;
        }
        
        /* Animations */
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        .fade-in {
            animation: fadeIn 1s ease forwards;
        }
        
        .delay-1 { animation-delay: 0.2s; }
        .delay-2 { animation-delay: 0.4s; }
        .delay-3 { animation-delay: 0.6s; }
        
        /* Responsive */
        @media (max-width: 992px) {
            .hero-title {
                font-size: 2.8rem;
            }
            
            .image-section h2 {
                font-size: 2rem;
            }
        }
        
        @media (max-width: 768px) {
            .hero-section {
                padding: 120px 0 80px;
            }
            
            .hero-title {
                font-size: 2.2rem;
            }
            
            .hero-subtitle {
                font-size: 1.1rem;
            }
            
            .section-title {
                font-size: 2rem;
            }
            
            .image-section, 
            .features-section,
            .testimonials-section,
            .pricing-section,
            .faq-section,
            .cta-section {
                padding: 70px 0;
            }
        }