:root {
            --color-primary: #0B1F3F;
            --color-primary-light: #1e3a5f;
            --color-accent: #c9a227;
            --color-text: #0B1F3F;
            --color-text-light: #4a5568;
            --color-bg: #ffffff;
            --transition: all 0.4s ease;
        }

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

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

        /* HEADER */
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            padding: 20px 0;
            background: transparent;
            transition: var(--transition);
        }

        header.scrolled {
            background: rgba(11, 31, 63, 0.98);
            box-shadow: 0 2px 20px rgba(0,0,0,0.2);
            padding: 15px 0;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo-img {
            height: 45px;
            width: auto;
            transition: var(--transition);
        }

        .nav-links {
            display: flex;
            list-style: none;
            gap: 35px;
            align-items: center;
        }

        .nav-links a {
            color: white;
            font-size: 13px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            transition: var(--transition);
            text-decoration: none;
        }

        .nav-links a:hover {
            opacity: 0.8;
        }

        .btn-cta {
            background: var(--color-accent);
            color: white;
            padding: 14px 28px;
            font-size: 12px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
            display: inline-block;
        }

        .btn-cta:hover {
            background: #a88320;
            transform: translateY(-2px);
        }

        /* HERO */
        .hero {
            height: 100vh;
            min-height: 700px;
            display: flex;
            align-items: center;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('https://images.unsplash.com/photo-1600585154340-be6161a56a0c?auto=format&fit=crop&w=1600&q=80');
            background-size: cover;
            background-position: center;
            animation: heroBackgroundSlideshow 24s infinite;
            transform: scale(1.03);
        }

        .hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(rgba(11, 31, 63, 0.68), rgba(11, 31, 63, 0.8));
        }

        .hero .container {
            position: relative;
            z-index: 1;
        }

        @keyframes heroBackgroundSlideshow {
            0%, 30% {
                background-image: url('https://images.unsplash.com/photo-1600585154340-be6161a56a0c?auto=format&fit=crop&w=1600&q=80');
            }
            33%, 63% {
                background-image: url('https://images.unsplash.com/photo-1600607687939-ce8a6c25118c?auto=format&fit=crop&w=1600&q=80');
            }
            66%, 100% {
                background-image: url('https://images.unsplash.com/photo-1484154218962-a197022b5858?auto=format&fit=crop&w=1600&q=80');
            }
        }

        .hero-content {
            max-width: 900px;
            color: white;
            padding-top: 80px;
        }

        .hero h1 {
            font-size: 52px;
            font-weight: 600;
            line-height: 1.2;
            margin-bottom: 20px;
            color: white;
        }

        .hero p {
            font-size: 22px;
            font-weight: 300;
            margin-bottom: 40px;
            opacity: 0.95;
            max-width: 600px;
        }

        .hero-buttons {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }

        .btn-primary {
            background: var(--color-primary);
            color: white;
            padding: 16px 32px;
            font-size: 14px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1px;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
            display: inline-block;
        }

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

        .btn-secondary {
            background: transparent;
            color: white;
            padding: 16px 32px;
            font-size: 14px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1px;
            border: 2px solid white;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
            display: inline-block;
        }

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

        /* STATS BANNER */
        .stats-banner {
            background: var(--color-primary);
            color: white;
            padding: 80px 0;
            text-align: center;
        }

        .stats-banner h2 {
            font-size: 16px;
            text-transform: uppercase;
            letter-spacing: 3px;
            margin-bottom: 15px;
            color: rgba(255,255,255,0.8);
            font-weight: 400;
        }

        .stats-banner .number {
            font-size: 56px;
            font-weight: 700;
            color: white;
            line-height: 1;
        }

        .stats-banner .unit {
            font-size: 24px;
            font-weight: 400;
            color: rgba(255,255,255,0.9);
        }

        /* SECTIONS GENERAL */
        section {
            padding: 100px 0;
        }

        .section-title {
            font-size: 36px;
            font-weight: 600;
            margin-bottom: 60px;
            color: var(--color-primary);
            text-align: center;
            position: relative;
        }

        .section-title::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: var(--color-primary);
            margin: 20px auto 0;
        }

        /* NOSOTROS */
        .about-section {
            background: #f8f9fa;
        }

        .two-columns {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 80px;
            align-items: center;
        }

        .about-content h2 {
            font-size: 36px;
            margin-bottom: 30px;
            color: var(--color-primary);
            text-align: left;
        }

        .about-content h2::after {
            margin: 20px 0 0;
        }

        .about-content p {
            font-size: 18px;
            line-height: 1.8;
            color: var(--color-text-light);
            margin-bottom: 20px;
        }

        .about-carousel {
            position: relative;
            height: 500px;
            overflow: hidden;
            background: white;
            box-shadow: 0 20px 40px rgba(0,0,0,0.1);
        }

        .about-carousel-track {
            position: relative;
            width: 100%;
            height: 100%;
        }

        .about-project-card {
            position: absolute;
            inset: 0;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.45s ease;
        }

        .about-project-card.active {
            opacity: 1;
            pointer-events: auto;
        }

        .about-project-image {
            width: 100%;
            height: 100%;
            background-size: cover;
            background-position: center;
        }

        .about-project-overlay {
            position: absolute;
            left: 0;
            right: 0;
            bottom: 0;
            padding: 22px 24px;
            background: linear-gradient(to top, rgba(11, 31, 63, 0.94), rgba(11, 31, 63, 0.15));
            color: white;
        }

        .about-project-type {
            display: inline-block;
            margin-bottom: 6px;
            padding: 4px 10px;
            background: rgba(201, 162, 39, 0.9);
            color: var(--color-primary);
            font-size: 11px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .about-project-overlay h3 {
            font-size: 24px;
            margin-bottom: 6px;
            line-height: 1.2;
        }

        .about-project-overlay p {
            font-size: 15px;
            opacity: 0.95;
            max-width: 90%;
        }

        .carousel-control {
            position: absolute;
            top: 50%;
            transform: translateY(-50%);
            width: 42px;
            height: 42px;
            border: none;
            cursor: pointer;
            background: rgba(11, 31, 63, 0.85);
            color: white;
            font-size: 22px;
            z-index: 2;
            transition: var(--transition);
        }

        .carousel-control:hover {
            background: var(--color-accent);
            color: var(--color-primary);
        }

        .carousel-control.prev {
            left: 12px;
        }

        .carousel-control.next {
            right: 12px;
        }

        .carousel-dots {
            position: absolute;
            left: 0;
            right: 0;
            bottom: 14px;
            display: flex;
            justify-content: center;
            gap: 8px;
            z-index: 2;
        }

        .carousel-dot {
            width: 9px;
            height: 9px;
            border-radius: 50%;
            border: 1px solid rgba(255,255,255,0.7);
            background: rgba(255,255,255,0.25);
            cursor: pointer;
            transition: var(--transition);
        }

        .carousel-dot.active {
            background: white;
        }

        /* SERVICIOS */
        .services-section {
            background: white;
        }

        .services-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 25px;
        }

        .service-card {
            background: #f8f9fa;
            padding: 40px 30px;
            text-align: center;
            border-top: 4px solid var(--color-primary);
            transition: var(--transition);
        }

        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.1);
            background: white;
        }

        .service-icon {
            font-size: 40px;
            margin-bottom: 20px;
            color: var(--color-primary);
        }

        .service-card h3 {
            font-size: 20px;
            margin-bottom: 15px;
            color: var(--color-primary);
        }

        .service-card p {
            font-size: 15px;
            color: var(--color-text-light);
            line-height: 1.6;
            margin-bottom: 25px;
            min-height: 70px;
        }

        .btn-service {
            display: inline-block;
            padding: 12px 24px;
            background: var(--color-primary);
            color: white;
            font-size: 12px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1px;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            width: 100%;
        }

        .btn-service:hover {
            background: var(--color-accent);
        }

        /* PROYECTOS */
        .projects-section {
            background: #f8f9fa;
        }

        .projects-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }

        .project-card {
            position: relative;
            overflow: hidden;
            aspect-ratio: 4/3;
            cursor: pointer;
            box-shadow: 0 4px 6px rgba(0,0,0,0.1);
            background: #ddd;
        }

        .project-image {
            width: 100%;
            height: 100%;
            background-size: cover;
            background-position: center;
            transition: var(--transition);
        }

        .project-card:hover .project-image {
            transform: scale(1.1);
        }

        .project-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 30px;
            background: linear-gradient(to top, rgba(11, 31, 63, 0.95), transparent);
            color: white;
            transform: translateY(100%);
            transition: var(--transition);
        }

        .project-card:hover .project-overlay {
            transform: translateY(0);
        }

        .project-overlay h3 {
            font-size: 20px;
            margin-bottom: 8px;
            color: white;
        }

        .project-overlay p {
            font-size: 13px;
            opacity: 0.9;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .project-1 { background-image: url('https://images.unsplash.com/photo-1497366216548-37526070297c?auto=format&fit=crop&w=800&q=80'); }
        .project-2 { background-image: url('https://images.unsplash.com/photo-1524758631624-e2822e304c36?auto=format&fit=crop&w=800&q=80'); }
        .project-3 { background-image: url('https://images.unsplash.com/photo-1497366811353-6870744d04b2?auto=format&fit=crop&w=800&q=80'); }
        .project-4 { background-image: url('https://images.unsplash.com/photo-1517502884422-41eaead166d4?auto=format&fit=crop&w=800&q=80'); }
        .project-5 { background-image: url('https://images.unsplash.com/photo-1497215842964-222b430dc094?auto=format&fit=crop&w=800&q=80'); }
        .project-6 { background-image: url('https://images.unsplash.com/photo-1604328698692-f76ea9498e76?auto=format&fit=crop&w=800&q=80'); }

        /* CONTACTO */
        .contact-section {
            background: white;
        }

        .contact-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr;
            gap: 60px;
            max-width: 1000px;
            margin: 0 auto;
        }

        .form-group {
            margin-bottom: 25px;
        }

        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-size: 12px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--color-primary);
        }

        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 14px;
            border: 1px solid #e2e8f0;
            font-family: inherit;
            font-size: 16px;
            transition: var(--transition);
            background: #f8f9fa;
        }

        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: var(--color-primary);
            background: white;
        }

        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .btn-submit {
            background: var(--color-primary);
            color: white;
            padding: 18px;
            font-size: 14px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1px;
            border: none;
            cursor: pointer;
            width: 100%;
            transition: var(--transition);
        }

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

        .contact-info-side h3 {
            margin-bottom: 30px;
            color: var(--color-primary);
            font-size: 24px;
        }

        .info-item {
            margin-bottom: 25px;
            padding-bottom: 25px;
            border-bottom: 1px solid #e2e8f0;
        }

        .info-item:last-child {
            border-bottom: none;
        }

        .info-item strong {
            display: block;
            font-size: 12px;
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 5px;
            color: var(--color-primary);
        }

        .info-item p {
            color: var(--color-text-light);
            font-size: 16px;
        }

        /* FOOTER */
        footer {
            background: var(--color-primary);
            color: white;
            padding: 60px 0 30px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 60px;
            margin-bottom: 40px;
        }

        .footer-logo-img {
            height: 40px;
            width: auto;
            margin-bottom: 20px;
            filter: brightness(0) invert(1);
        }

        .footer-col p {
            opacity: 0.8;
            line-height: 1.6;
            font-size: 14px;
        }

        .footer-col h4 {
            color: white;
            font-size: 14px;
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: 20px;
        }

        .footer-links {
            list-style: none;
        }

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            color: rgba(255,255,255,0.8);
            font-size: 14px;
            transition: var(--transition);
            text-decoration: none;
        }

        .footer-links a:hover {
            color: white;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 30px;
            text-align: center;
            opacity: 0.6;
            font-size: 13px;
        }

        /* RESPONSIVE */
        @media (max-width: 1024px) {
            .services-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .projects-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 968px) {
            .nav-links {
                display: none;
            }
            .hero h1 {
                font-size: 36px;
            }
            .two-columns,
            .contact-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .about-carousel {
                height: 420px;
            }
            .form-row {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
        }

        @media (max-width: 640px) {
            .services-grid {
                grid-template-columns: 1fr;
            }
            .projects-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 480px) {
            .logo-img {
                height: 35px;
            }
            .btn-cta {
                padding: 12px 20px;
                font-size: 11px;
            }
            .hero h1 {
                font-size: 28px;
            }
            .hero-buttons {
                flex-direction: column;
            }
            .btn-primary,
            .btn-secondary {
                width: 100%;
                text-align: center;
            }
            .about-carousel {
                height: 360px;
            }
            .about-project-overlay h3 {
                font-size: 20px;
            }
        }