* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
            overflow-x: hidden;
        }

        :root {
            --primary-color: #000000;
            --secondary-color: #1a1a1a;
            --accent-color: #2b2b2b;
            --gold-color: #FFD700;
            --gold-dark: #FFA500;
            --light-bg: #f8f9fa;
        }

        /* Header & Navigation */
        header {
            background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
            color: white;
            padding: 1rem 0;
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0,0,0,0.3);
            backdrop-filter: blur(10px);
        }

        nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 2rem;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .logo img {
            height: 50px;
            width: auto;
            transition: transform 0.3s;
        }

        .logo img:hover {
            transform: scale(1.1) rotate(5deg);
        }

        .logo-text {
            font-size: 1.8rem;
            font-weight: bold;
            background: linear-gradient(135deg, #FFD700, #FFA500);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

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

        .nav-links a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            transition: all 0.3s;
            position: relative;
            padding: 0.5rem 0;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: #FFD700;
            transition: width 0.3s;
        }

        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 100%;
        }

        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }

        /* Hero Section */
        .hero {
            margin-top: 70px;
            background: linear-gradient(rgba(0, 0, 0, 0.75), rgba(0, 0, 0, 0.75)), 
                        url('https://images.unsplash.com/photo-1552664730-d307ca884978?w=1600&q=80');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            color: white;
            padding: 8rem 2rem;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 200%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 215, 0, 0.15), transparent);
            animation: shine 3s infinite;
        }

        @keyframes shine {
            0% { left: -100%; }
            100% { left: 100%; }
        }

        .hero h1 {
            font-size: 4rem;
            margin-bottom: 1rem;
            background: linear-gradient(135deg, #FFD700, #FFA500);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero p {
            font-size: 1.5rem;
            margin-bottom: 2rem;
        }

        /* Sections */
        section {
            padding: 0.5rem 0.5rem;
            max-width: 1400px;
            margin: 0 auto;
        }

        .section-title {
            text-align: center;
            font-size: 3rem;
            margin-bottom: 1rem;
            color: var(--primary-color);
            position: relative;
        }

        .section-subtitle {
            text-align: center;
            font-size: 1.2rem;
            color: #666;
            margin-bottom: 3rem;
            max-width: 800px;
            margin-left: auto;
            margin-right: auto;
        }

        .section-title::after {
            content: '';
            display: block;
            width: 100px;
            height: 5px;
            background: linear-gradient(90deg, #FFD700, #FFA500);
            margin: 1rem auto;
            border-radius: 3px;
        }

        /* Filter Buttons */
        .filter-buttons {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 1rem;
            margin-bottom: 3rem;
        }

        .filter-btn {
            padding: 0.8rem 2rem;
            background: white;
            border: 2px solid var(--gold-color);
            border-radius: 50px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
            color: var(--primary-color);
        }

        .filter-btn:hover,
        .filter-btn.active {
            background: linear-gradient(135deg, #FFD700, #FFA500);
            color: #000;
            transform: translateY(-3px);
            box-shadow: 0 5px 20px rgba(255, 215, 0, 0.4);
        }

        /* Clients Grid */
        .clients-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 2.5rem;
            margin-bottom: 4rem;
        }

        .client-card {
            background: white;
            border-radius: 20px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
            transition: all 0.4s;
            overflow: hidden;
            position: relative;
            height: 320px;
            cursor: pointer;
        }

        .client-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 50px rgba(255, 215, 0, 0.3);
        }

        .client-card-front {
            padding: 2rem;
            height: 100%;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            text-align: center;
            transition: opacity 0.3s;
        }

        .client-icon {
            font-size: 4rem;
            margin-bottom: 1rem;
        }

        .client-name {
            font-size: 1.8rem;
            font-weight: bold;
            margin-bottom: 0.5rem;
            color: var(--primary-color);
        }

        .client-sector {
            color: var(--gold-color);
            font-weight: 600;
            font-size: 1rem;
        }

        .client-stats {
            margin-top: 1rem;
            font-size: 0.9rem;
            color: #666;
        }

        .client-card-back {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(135deg, rgba(0,0,0,0.95), rgba(26,26,26,0.95));
            color: white;
            padding: 2rem;
            display: flex;
            flex-direction: column;
            justify-content: center;
            opacity: 0;
            transition: opacity 0.3s;
        }

        .client-card:hover .client-card-back {
            opacity: 1;
        }

        .client-comment-stars {
            color: #FFD700;
            font-size: 1.5rem;
            margin-bottom: 1rem;
            text-align: center;
        }

        .client-comment-text {
            font-size: 1rem;
            font-style: italic;
            margin-bottom: 1rem;
            line-height: 1.6;
        }

        .client-comment-author {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--gold-color);
            text-align: right;
        }

        .client-results {
            margin-top: 1rem;
            padding-top: 1rem;
            border-top: 1px solid rgba(255, 215, 0, 0.3);
        }

        .client-result-item {
            font-size: 0.85rem;
            margin: 0.3rem 0;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .client-result-item::before {
            content: "✓";
            color: var(--gold-color);
            font-weight: bold;
        }

        /* Stats Banner */
        .stats-banner {
            background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
            color: white;
            padding: 4rem 2rem;
            margin: 4rem 0;
            border-radius: 20px;
            text-align: center;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 3rem;
            margin-top: 2rem;
        }

        .stat-item h3 {
            font-size: 3.5rem;
            margin-bottom: 0.5rem;
            color: #FFD700;
        }

        .stat-item p {
            font-size: 1.1rem;
        }

        /* Testimonials Section */
        .testimonials-slider {
            background: var(--light-bg);
            padding: 4rem 2rem;
            border-radius: 20px;
            margin: 4rem 0;
        }

        .testimonial-card {
            background: white;
            padding: 3rem;
            border-radius: 20px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
            max-width: 800px;
            margin: 0 auto;
            text-align: center;
        }

        .testimonial-stars {
            color: #FFD700;
            font-size: 2rem;
            margin-bottom: 1rem;
        }

        .testimonial-text {
            font-size: 1.3rem;
            font-style: italic;
            color: #333;
            margin-bottom: 2rem;
            line-height: 1.8;
        }

        .testimonial-author {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 1rem;
            margin-top: 2rem;
            padding-top: 2rem;
            border-top: 2px solid var(--gold-color);
        }

        .testimonial-avatar {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: linear-gradient(135deg, #FFD700, #FFA500);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: bold;
        }

        .testimonial-info h4 {
            font-size: 1.2rem;
            color: var(--primary-color);
            margin-bottom: 0.3rem;
        }

        .testimonial-info p {
            color: #666;
        }

        /* Footer */
        footer {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
            text-align: center;
            padding: 3rem;
        }

        /* WhatsApp Float */
        .whatsapp-float {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 60px;
            height: 60px;
            background: #25D366;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
            cursor: pointer;
            transition: all 0.3s;
            animation: pulse 2s infinite;
            z-index: 999;
        }

        .whatsapp-float:hover {
            transform: scale(1.1);
        }

        .whatsapp-float svg {
            width: 35px;
            height: 35px;
            fill: white;
        }

        @keyframes pulse {
            0%, 100% {
                box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
            }
            50% {
                box-shadow: 0 4px 30px rgba(37, 211, 102, 0.8);
            }
        }

        /* Responsive */
        @media (max-width: 768px) {
            .mobile-menu-btn {
                display: block;
            }

            .nav-links {
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--primary-color);
                flex-direction: column;
                padding: 2rem;
                display: none;
            }

            .nav-links.active {
                display: flex;
            }

            .hero h1 {
                font-size: 2.5rem;
            }

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

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

            .filter-buttons {
                flex-direction: column;
            }
        }