:root {
            --primary-color: #2C3E50;
            --secondary-color: #3498DB;
            --accent-color: #E74C3C;
            --light-gray: #ECF0F1;
            --dark-gray: #34495E;
        }
        
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            color: #333;
        }
        
        /* Navigation */
        .navbar {
            background-color: rgba(255, 255, 255, 0.98);
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            transition: all 0.3s ease;
        }
        
        .navbar-brand {
            font-weight: bold;
            font-size: 1.5rem;
            color: var(--primary-color) !important;
        }
        
        .nav-link {
            color: var(--dark-gray) !important;
            font-weight: 500;
            margin: 0 10px;
            transition: color 0.3s ease;
        }
        
        .nav-link:hover {
            color: var(--secondary-color) !important;
        }
        
        /* Hero Section */
        .hero {
            background: linear-gradient(135deg, var(--primary-color) 0%, var(--dark-gray) 100%);
            color: white;
            padding: 120px 0 80px;
            position: relative;
            overflow: hidden;
        }
        
        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M 100 0 L 0 0 0 100" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)" /></svg>');
            opacity: 0.3;
        }
        
        .hero-content {
            position: relative;
            z-index: 1;
        }
        
        .hero h1 {
            font-size: 3.5rem;
            font-weight: bold;
            margin-bottom: 1.5rem;
            animation: fadeInUp 1s ease;
        }
        
        .hero .lead {
            font-size: 1.4rem;
            margin-bottom: 2rem;
            animation: fadeInUp 1s ease 0.2s both;
        }
        
        .hero .tagline {
            font-size: 1.8rem;
            color: var(--accent-color);
            font-weight: 600;
            margin-bottom: 2rem;
            animation: fadeInUp 1s ease 0.3s both;
        }
        
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        .btn-primary-custom {
            background-color: var(--secondary-color);
            border: none;
            padding: 12px 35px;
            font-size: 1.1rem;
            font-weight: 600;
            border-radius: 50px;
            transition: all 0.3s ease;
            animation: fadeInUp 1s ease 0.4s both;
        }
        
        .btn-primary-custom:hover {
            background-color: #2980B9;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(52, 152, 219, 0.3);
        }
        
        /* Section Styles */
        section {
            padding: 80px 0;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 60px;
            position: relative;
        }
        
        .section-title h2 {
            font-size: 2.5rem;
            font-weight: bold;
            color: var(--primary-color);
            margin-bottom: 15px;
        }
        
        .section-title .underline {
            width: 80px;
            height: 4px;
            background: var(--secondary-color);
            margin: 0 auto 20px;
        }
        
        .section-title p {
            color: #666;
            font-size: 1.1rem;
        }
        
        /* About Section */
        #about {
            background-color: white;
        }
        
        .about-content {
            font-size: 1.1rem;
            line-height: 1.8;
            color: #555;
        }
        
        .highlight-box {
            background: linear-gradient(135deg, var(--light-gray) 0%, #fff 100%);
            padding: 30px;
            border-radius: 15px;
            border-left: 5px solid var(--secondary-color);
            margin: 30px 0;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
        }
        
        .highlight-box h4 {
            color: var(--primary-color);
            margin-bottom: 15px;
            font-weight: 600;
        }
        
        /* Approach Section */
        #approach {
            background: linear-gradient(135deg, var(--light-gray) 0%, #fff 100%);
        }
        
        .approach-card {
            background: white;
            padding: 40px 30px;
            border-radius: 15px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.1);
            transition: all 0.3s ease;
            height: 100%;
            border-top: 4px solid var(--secondary-color);
        }
        
        .approach-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 35px rgba(0,0,0,0.15);
        }
        
        .approach-card .icon {
            font-size: 3rem;
            color: var(--secondary-color);
            margin-bottom: 20px;
        }
        
        .approach-card h4 {
            color: var(--primary-color);
            font-weight: 600;
            margin-bottom: 15px;
        }
        
        .approach-card p {
            color: #666;
            line-height: 1.7;
        }
        
        /* Skills Section */
        #skills {
            background-color: white;
        }
        
        .skill-category {
            margin-bottom: 40px;
        }
        
        .skill-category h4 {
            color: var(--primary-color);
            font-weight: 600;
            margin-bottom: 20px;
            font-size: 1.3rem;
        }
        
        .skill-badge {
            display: inline-block;
            background: linear-gradient(135deg, var(--secondary-color) 0%, #2980B9 100%);
            color: white;
            padding: 10px 20px;
            margin: 5px;
            border-radius: 25px;
            font-weight: 500;
            transition: all 0.3s ease;
            box-shadow: 0 3px 10px rgba(52, 152, 219, 0.3);
        }
        
        .skill-badge:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 15px rgba(52, 152, 219, 0.4);
        }
        
        .skill-badge i {
            margin-right: 5px;
        }
        
        /* Services Section */
        #services {
            background: linear-gradient(135deg, var(--primary-color) 0%, var(--dark-gray) 100%);
            color: white;
        }
        
        #services .section-title h2,
        #services .section-title p {
            color: white;
        }
        
        .service-card {
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(10px);
            padding: 40px 30px;
            border-radius: 15px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            transition: all 0.3s ease;
            height: 100%;
        }
        
        .service-card:hover {
            background: rgba(255, 255, 255, 0.15);
            transform: translateY(-5px);
        }
        
        .service-card .icon {
            font-size: 3rem;
            color: var(--accent-color);
            margin-bottom: 20px;
        }
        
        .service-card h4 {
            font-weight: 600;
            margin-bottom: 15px;
        }
        
        .service-card ul {
            list-style: none;
            padding: 0;
        }
        
        .service-card ul li {
            padding: 8px 0;
            padding-left: 25px;
            position: relative;
        }
        
        .service-card ul li::before {
            content: '✓';
            position: absolute;
            left: 0;
            color: var(--accent-color);
            font-weight: bold;
        }
        
        /* Values Section */
        #values {
            background-color: white;
        }
        
        .value-item {
            text-align: center;
            padding: 30px 20px;
            transition: all 0.3s ease;
        }
        
        .value-item:hover {
            transform: scale(1.05);
        }
        
        .value-item .icon {
            font-size: 3.5rem;
            color: var(--secondary-color);
            margin-bottom: 20px;
        }
        
        .value-item h5 {
            color: var(--primary-color);
            font-weight: 600;
            margin-bottom: 10px;
        }
        
        .value-item p {
            color: #666;
        }
        
        
        /* References Section */
        .reference-card {
            background: white;
            border-radius: 15px;
            padding: 30px;
            height: 100%;
            box-shadow: 0 5px 20px rgba(0,0,0,0.1);
            transition: all 0.3s ease;
            border-left: 4px solid var(--secondary-color);
        }
        
        .reference-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 30px rgba(0,0,0,0.15);
        }
        
        .reference-header {
            display: flex;
            align-items: center;
            margin-bottom: 20px;
            padding-bottom: 15px;
            border-bottom: 2px solid var(--light-gray);
        }
        
        .reference-icon {
            font-size: 2.5rem;
            color: var(--secondary-color);
            margin-right: 15px;
        }
        
        .reference-header h4 {
            color: var(--primary-color);
            font-weight: 600;
            margin: 0;
            font-size: 1.3rem;
        }
        
        .reference-header .sector {
            color: #888;
            margin: 5px 0 0 0;
            font-size: 0.9rem;
        }
        
        .reference-content h5 {
            color: var(--dark-gray);
            font-weight: 600;
            margin-bottom: 15px;
            font-size: 1.1rem;
        }
        
        .reference-content .description {
            color: #666;
            line-height: 1.7;
            margin-bottom: 20px;
        }
        
        .technologies {
            margin-bottom: 20px;
        }
        
        .tech-tag {
            display: inline-block;
            background: var(--light-gray);
            color: var(--primary-color);
            padding: 5px 12px;
            margin: 3px;
            border-radius: 15px;
            font-size: 0.85rem;
            font-weight: 500;
        }
        
        .achievements {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        
        .achievements li {
            padding: 8px 0;
            padding-left: 25px;
            position: relative;
            color: #555;
            font-size: 0.95rem;
        }
        
        .achievements li::before {
            content: '✓';
            position: absolute;
            left: 0;
            color: var(--secondary-color);
            font-weight: bold;
            font-size: 1.1rem;
        }
        
        /* Contact Section */
        #contact {
            background: linear-gradient(135deg, var(--light-gray) 0%, #fff 100%);
        }
        
        .contact-info {
            background: white;
            padding: 40px;
            border-radius: 15px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.1);
        }
        
        .contact-item {
            display: flex;
            align-items: center;
            margin-bottom: 25px;
        }
        
        .contact-item .icon {
            font-size: 2rem;
            color: var(--secondary-color);
            margin-right: 20px;
            width: 50px;
            text-align: center;
        }
        
        .contact-item .info h5 {
            color: var(--primary-color);
            margin-bottom: 5px;
            font-weight: 600;
        }
        
        .contact-item .info p {
            margin: 0;
            color: #666;
        }
        
        /* Footer */
        footer {
            background-color: var(--primary-color);
            color: white;
            padding: 30px 0;
            text-align: center;
        }
        
        footer a {
            color: var(--secondary-color);
            text-decoration: none;
        }
        
        footer a:hover {
            color: white;
        }
        
        /* Responsive */
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2.5rem;
            }
            
            .hero .lead {
                font-size: 1.2rem;
            }
            
            .hero .tagline {
                font-size: 1.4rem;
            }
            
            .section-title h2 {
                font-size: 2rem;
            }
        }