:root {
            --primary: #2c3e50;
            --secondary: #3498db;
            --accent: #e74c3c;
            --light: #ecf0f1;
            --dark: #2c3e50;
            --text: #333;
            --text-light: #7f8c8d;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        body {
            background-color: #f9f9f9;
            color: var(--text);
            line-height: 1.6;
        }

        .certificate-hero {
            background: linear-gradient(135deg, var(--primary) 0%, var(--dark) 100%);
            color: white;
            padding: 5rem 2rem;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero-content {
            max-width: 1200px;
            margin: 0 auto;
            position: relative;
            z-index: 2;
        }

        .certificate-hero h1 {
            font-size: 3rem;
            margin-bottom: 1.5rem;
            font-weight: 700;
        }

        .certificate-hero p {
            font-size: 1.2rem;
            max-width: 800px;
            margin: 0 auto 2rem;
        }

        .hero-image {
            width: 100%;
            max-width: 600px;
            margin: 2rem auto;
            border-radius: 8px;
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
            transform: rotate(3deg);
            transition: transform 0.3s ease;
        }

        .hero-image:hover {
            transform: rotate(0deg) scale(1.02);
        }

        .cta-button {
            display: inline-block;
            background-color: var(--accent);
            color: white;
            padding: 12px 30px;
            border-radius: 50px;
            font-weight: 600;
            text-decoration: none;
            margin: 1rem 0.5rem;
            transition: all 0.3s ease;
            border: 2px solid var(--accent);
        }

        .cta-button:hover {
            background-color: transparent;
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
        }

        .cta-button.secondary {
            background-color: transparent;
            border-color: white;
        }

        .cta-button.secondary:hover {
            background-color: white;
            color: var(--primary);
        }

        .features-section {
            padding: 5rem 2rem;
            max-width: 1200px;
            margin: 0 auto;
        }

        .section-title {
            text-align: center;
            margin-bottom: 3rem;
            font-size: 2.5rem;
            color: var(--primary);
            position: relative;
        }

        .section-title:after {
            content: '';
            display: block;
            width: 80px;
            height: 4px;
            background: var(--secondary);
            margin: 15px auto;
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }

        .feature-card {
            background: white;
            border-radius: 10px;
            padding: 2rem;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            text-align: center;
        }

        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }

        .feature-icon {
            font-size: 3rem;
            color: var(--secondary);
            margin-bottom: 1.5rem;
        }

        .feature-card h3 {
            font-size: 1.5rem;
            margin-bottom: 1rem;
            color: var(--primary);
        }

        .portfolio-section {
            padding: 5rem 2rem;
            background-color: var(--light);
        }

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

        .portfolio-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin-top: 3rem;
        }

        .portfolio-item {
            position: relative;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            transition: transform 0.3s ease;
        }

        .portfolio-item:hover {
            transform: scale(1.03);
        }

        .portfolio-image {
            width: 100%;
            height: 250px;
            object-fit: cover;
            display: block;
        }

        .portfolio-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
            color: white;
            padding: 1.5rem;
        }

        .portfolio-overlay h3 {
            margin-bottom: 0.5rem;
        }

        .testimonials-section {
            padding: 5rem 2rem;
            max-width: 1200px;
            margin: 0 auto;
        }

        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin-top: 3rem;
        }

        .testimonial-card {
            background: white;
            border-radius: 10px;
            padding: 2rem;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            position: relative;
        }

        .testimonial-card:before {
            content: '"';
            font-size: 5rem;
            color: var(--light);
            position: absolute;
            top: 10px;
            left: 20px;
            line-height: 1;
            z-index: 0;
        }

        .testimonial-content {
            position: relative;
            z-index: 1;
            margin-bottom: 1.5rem;
        }

        .testimonial-author {
            display: flex;
            align-items: center;
        }

        .author-avatar {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            object-fit: cover;
            margin-right: 1rem;
        }

        .author-info h4 {
            margin-bottom: 0.2rem;
            color: var(--primary);
        }

        .author-info p {
            color: var(--text-light);
            font-size: 0.9rem;
        }

        .pricing-section {
            padding: 5rem 2rem;
            background-color: var(--light);
        }

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

        .pricing-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin-top: 3rem;
        }

        .pricing-card {
            background: white;
            border-radius: 10px;
            padding: 2rem;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            text-align: center;
            transition: transform 0.3s ease;
        }

        .pricing-card:hover {
            transform: translateY(-10px);
        }

        .pricing-card.popular {
            border: 2px solid var(--secondary);
            position: relative;
        }

        .popular-badge {
            position: absolute;
            top: -15px;
            right: 20px;
            background: var(--secondary);
            color: white;
            padding: 0.5rem 1rem;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: bold;
        }

        .pricing-card h3 {
            font-size: 1.8rem;
            margin-bottom: 1rem;
            color: var(--primary);
        }

        .price {
            font-size: 3rem;
            font-weight: bold;
            color: var(--secondary);
            margin-bottom: 1.5rem;
        }

        .price span {
            font-size: 1rem;
            color: var(--text-light);
        }

        .pricing-features {
            list-style: none;
            margin-bottom: 2rem;
        }

        .pricing-features li {
            padding: 0.5rem 0;
            border-bottom: 1px solid #eee;
        }

        .contact-section {
            padding: 5rem 2rem;
            max-width: 1200px;
            margin: 0 auto;
        }

        .contact-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 3rem;
            margin-top: 3rem;
        }

        .contact-info {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }

        .contact-card {
            display: flex;
            align-items: flex-start;
            gap: 1rem;
        }

        .contact-icon {
            font-size: 1.5rem;
            color: var(--secondary);
            min-width: 40px;
            text-align: center;
            padding-top: 5px;
        }

        .contact-form {
            background: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }

        .form-group {
            margin-bottom: 1.5rem;
        }

        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }

        .form-control {
            width: 100%;
            padding: 12px;
            border: 1px solid #ddd;
            border-radius: 5px;
            font-size: 1rem;
            transition: border 0.3s ease;
        }

        .form-control:focus {
            border-color: var(--secondary);
            outline: none;
        }

        textarea.form-control {
            min-height: 150px;
            resize: vertical;
        }

        .submit-btn {
            background: var(--secondary);
            color: white;
            border: none;
            padding: 12px 30px;
            border-radius: 5px;
            cursor: pointer;
            font-weight: 600;
            transition: background 0.3s ease;
        }

        .submit-btn:hover {
            background: var(--primary);
        }

        @media (max-width: 768px) {
            .certificate-hero h1 {
                font-size: 2.2rem;
            }

            .certificate-hero p {
                font-size: 1rem;
            }

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

            .price {
                font-size: 2.5rem;
            }
        }

        /* Animation classes */
        .fade-in {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }

        .fade-in.visible {
            opacity: 1;
            transform: translateY(0);
        }