:root {
            --matte-black: #1a1a1a;
            --anthracite: #2d3436;
            --concrete: #636e72;
            --rust-orange: #d35400;
            --whatsapp-green: #25D366;
            --technical-white: #f8f9fa;
            --light-gray: #dfe6e9;
            --hero-bg: url('../assets/images/hero-bg.jpg');
        }

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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: var(--anthracite);
            background-color: var(--technical-white);
            text-align: center;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            text-align: center;
        }

        /* Header & Navigation */
        header {
            background-color: var(--matte-black);
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            text-align: center;
        }

        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
            text-align: center;
        }

        .logo-container {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
        }

        .logo-image {
            height: 50px;
            width: auto;
            max-width: 200px;
            object-fit: contain;
        }

        .logo-main {
            color: var(--technical-white);
            font-size: 28px;
            font-weight: 700;
            text-decoration: none;
            line-height: 1;
            letter-spacing: 1px;
            text-align: center;
        }

        .logo-main span {
            color: var(--rust-orange);
        }

        .logo-subtitle {
            color: var(--light-gray);
            font-size: 11px;
            letter-spacing: 1.5px;
            margin-top: 2px;
            font-weight: 500;
            text-transform: uppercase;
            text-align: center;
        }

        .nav-links {
            display: flex;
            list-style: none;
            justify-content: center;
        }

        .nav-links li {
            margin-left: 30px;
        }

        .nav-links a {
            color: var(--light-gray);
            text-decoration: none;
            font-weight: 500;
            transition: color 0.3s;
            font-size: 16px;
            text-align: center;
        }

        .nav-links a:hover {
            color: var(--rust-orange);
        }

        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: var(--technical-white);
            font-size: 24px;
            cursor: pointer;
        }

        /* Hero Section */
        .hero {
            background: linear-gradient(rgba(26, 26, 26, 0.85), rgba(45, 52, 54, 0.9)), url('assets/images/hero-bg.jpg');
            background-size: cover;
            background-position: center;
            color: var(--technical-white);
            padding: 180px 0 120px;
            text-align: center;
            margin-top: 90px;
        }

        /* HERO background image + overlay */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            overflow: hidden;
            color: #fff;
        }

        /* The picture/img acts as the background layer */
        .hero-bg {
            position: absolute;
            inset: 0;
            z-index: 0;
            pointer-events: none;
        }

        .hero-bg img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transform: translate3d(0, 0, 0) scale(1.06);
            /* slight scale to avoid edge gaps during parallax */
            will-change: transform;
        }

        /* Dark overlay for readability */
        .hero::before {
            content: "";
            position: absolute;
            inset: 0;
            z-index: 1;
            background: linear-gradient(rgba(0, 0, 0, 0.55),
                    rgba(0, 0, 0, 0.55));
        }

        /* Ensure hero content sits above overlay */
        .hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }

        /* On-load animation */
        .hero-anim {
            opacity: 0;
            transform: translateY(14px);
        }

        /* When activated via JS */
        .hero.is-visible .hero-anim {
            animation: heroFadeUp 900ms cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
        }

        /* Stagger for nicer entrance */
        .hero.is-visible #logoHero {
            animation-delay: 0ms;
        }

        .hero.is-visible #heroTitle {
            animation-delay: 120ms;
        }

        .hero.is-visible #heroSubtitle {
            animation-delay: 240ms;
        }

        .hero.is-visible .hero-cta {
            animation-delay: 360ms;
        }

        @keyframes heroFadeUp {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* Respect reduced motion preferences */
        @media (prefers-reduced-motion: reduce) {
            .hero-bg img {
                transform: none !important;
            }

            .hero-anim {
                opacity: 1;
                transform: none;
            }

            .hero.is-visible .hero-anim {
                animation: none;
            }
        }

        /* CTA wrapper */
        .hero-cta,
        .about-cta {
            display: flex;
            gap: 15px;
            justify-content: center;
            flex-wrap: wrap;
            margin-top: 30px;
        }

        .hero-logo {
            max-width: 300px;
            height: auto;
            margin: 0 auto 30px;
            display: block;
        }

        .hero h1 {
            font-size: 3rem;
            margin-bottom: 20px;
            line-height: 1.2;
            text-align: center;
        }

        .hero p {
            font-size: 1.2rem;
            max-width: 700px;
            margin: 0 auto 40px;
            color: var(--light-gray);
            text-align: center;
        }

        .btn {
            display: inline-block;
            background-color: var(--rust-orange);
            color: white;
            padding: 15px 30px;
            text-decoration: none;
            border-radius: 4px;
            font-weight: 600;
            transition: background-color 0.3s, transform 0.3s;
            border: none;
            cursor: pointer;
            font-size: 16px;
            text-align: center;
        }

        .btn:hover {
            background-color: #e67e22;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
        }

        .btn-whatsapp {
            background-color: var(--whatsapp-green);
            color: white;
        }

        .btn-whatsapp:hover {
            background-color: #128C7E;
        }

        .btn-outline {
            background-color: transparent;
            border: 2px solid var(--rust-orange);
            color: var(--rust-orange);
        }

        .btn-outline:hover {
            background-color: var(--rust-orange);
            color: white;
        }

        /* WhatsApp Fixed Button */
        .whatsapp-float {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 1000;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 10px;
        }

        .whatsapp-btn {
            background-color: var(--whatsapp-green);
            color: white;
            width: 60px;
            height: 60px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 30px;
            box-shadow: 0 4px 12px rgba(37, 211, 102, 0.3);
            transition: all 0.3s;
            text-decoration: none;
        }

        .whatsapp-btn:hover {
            background-color: #128C7E;
            transform: scale(1.1);
            box-shadow: 0 6px 18px rgba(37, 211, 102, 0.4);
        }

        .whatsapp-tooltip {
            background-color: var(--matte-black);
            color: white;
            padding: 8px 15px;
            border-radius: 20px;
            font-size: 14px;
            opacity: 0;
            transform: translateY(10px);
            transition: all 0.3s;
            pointer-events: none;
        }

        .whatsapp-btn:hover+.whatsapp-tooltip {
            opacity: 1;
            transform: translateY(0);
        }

        /* WhatsApp QR Section */
        .whatsapp-section {
            background-color: white;
            padding: 80px 0;
            text-align: center;
        }

        .whatsapp-container {
            max-width: 800px;
            margin: 0 auto;
            text-align: center;
        }

        .whatsapp-qr-container {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 30px;
            margin-top: 40px;
        }

        .whatsapp-qr-box {
            background-color: var(--technical-white);
            padding: 30px;
            border-radius: 12px;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
            text-align: center;
            max-width: 300px;
        }

        .whatsapp-qr-image {
            width: 200px;
            height: 200px;
            margin: 0 auto 20px;
            display: block;
            border: 8px solid white;
            border-radius: 8px;
        }

        .whatsapp-info {
            text-align: center;
        }

        .whatsapp-info h3 {
            color: var(--whatsapp-green);
            margin-bottom: 10px;
            font-size: 1.3rem;
        }

        .whatsapp-info p {
            color: var(--concrete);
            margin-bottom: 20px;
        }

        .whatsapp-number {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background-color: var(--anthracite);
            color: white;
            padding: 12px 25px;
            border-radius: 30px;
            font-size: 1.1rem;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s;
        }

        .whatsapp-number:hover {
            background-color: var(--whatsapp-green);
            transform: translateY(-3px);
        }

        /* Services Section */
        .section-title {
            text-align: center;
            margin-bottom: 60px;
        }

        .section-title h2 {
            font-size: 2.5rem;
            color: var(--matte-black);
            position: relative;
            display: inline-block;
            padding-bottom: 15px;
            text-align: center;
        }

        .section-title h2:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 100px;
            height: 4px;
            background-color: var(--rust-orange);
        }

        .section-subtitle {
            text-align: center;
            color: var(--concrete);
            max-width: 700px;
            margin: 0 auto 40px;
            font-size: 1.1rem;
        }

        .services {
            padding: 100px 0;
            background-color: white;
            text-align: center;
        }

        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

        .service-card {
            background-color: var(--technical-white);
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: transform 0.3s, box-shadow 0.3s;
            border-top: 4px solid var(--concrete);
            text-align: center;
        }

        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
            border-top-color: var(--rust-orange);
        }

        .service-icon {
            background-color: var(--anthracite);
            color: white;
            font-size: 40px;
            height: 100px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .service-content {
            padding: 30px;
            text-align: center;
        }

        .service-content h3 {
            font-size: 1.5rem;
            margin-bottom: 15px;
            color: var(--matte-black);
            text-align: center;
        }

        .service-content p {
            text-align: center;
        }

        /* Projects Gallery */
        .projects {
            padding: 100px 0;
            background-color: var(--technical-white);
            text-align: center;
        }

        .project-filters {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 40px;
        }

        .filter-btn {
            background-color: white;
            border: 1px solid var(--light-gray);
            color: var(--anthracite);
            padding: 10px 20px;
            border-radius: 4px;
            cursor: pointer;
            transition: all 0.3s;
            font-weight: 500;
            font-size: 15px;
            text-align: center;
        }

        .filter-btn:hover,
        .filter-btn.active {
            background-color: var(--rust-orange);
            color: white;
            border-color: var(--rust-orange);
        }

        .projects-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
            gap: 30px;
            margin-bottom: 50px;
        }

        .project-card {
            background-color: white;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: transform 0.3s, box-shadow 0.3s;
            text-align: center;
        }

        .project-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }

        .project-image {
            height: 250px;
            overflow: hidden;
            background-color: #f5f5f5;
        }

        .project-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s;
        }

        .project-card:hover .project-image img {
            transform: scale(1.05);
        }

        .project-info {
            padding: 25px;
            text-align: center;
        }

        .project-category {
            display: inline-block;
            background-color: var(--anthracite);
            color: white;
            padding: 5px 15px;
            border-radius: 20px;
            font-size: 0.85rem;
            margin-bottom: 15px;
            text-align: center;
        }

        .project-info h3 {
            font-size: 1.3rem;
            margin-bottom: 10px;
            color: var(--matte-black);
            text-align: center;
        }

        .project-info p {
            color: var(--concrete);
            margin-bottom: 15px;
            text-align: center;
        }

        .project-details {
            display: flex;
            justify-content: space-between;
            color: var(--concrete);
            font-size: 0.9rem;
            border-top: 1px solid var(--light-gray);
            padding-top: 15px;
            text-align: center;
        }

        .project-details span {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 5px;
        }

        .project-modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.9);
            z-index: 2000;
            align-items: center;
            justify-content: center;
            padding: 20px;
            text-align: center;
        }

        .modal-content {
            background-color: white;
            max-width: 900px;
            width: 100%;
            border-radius: 8px;
            overflow: hidden;
            max-height: 90vh;
            overflow-y: auto;
            text-align: center;
        }

        .modal-header {
            padding: 20px;
            background-color: var(--anthracite);
            color: white;
            display: flex;
            justify-content: space-between;
            align-items: center;
            text-align: center;
        }

        .modal-close {
            background: none;
            border: none;
            color: white;
            font-size: 24px;
            cursor: pointer;
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            transition: background-color 0.3s;
        }

        .modal-close:hover {
            background-color: rgba(255, 255, 255, 0.1);
        }

        .modal-body {
            padding: 30px;
            text-align: center;
        }

        .modal-body h4 {
            text-align: center;
            margin-bottom: 15px;
        }

        .modal-body p {
            text-align: center;
        }

        .modal-gallery {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 15px;
            margin: 20px 0;
        }

        .modal-gallery img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: 4px;
            cursor: pointer;
            transition: transform 0.3s;
        }

        .modal-gallery img:hover {
            transform: scale(1.03);
        }

        .modal-details {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            margin: 25px 0;
            padding: 25px;
            background-color: var(--technical-white);
            border-radius: 8px;
            text-align: center;
        }

        .detail-item h4 {
            color: var(--rust-orange);
            margin-bottom: 8px;
            font-size: 0.9rem;
            text-align: center;
        }

        .detail-item p {
            text-align: center;
        }

        /* About Section */
        .about {
            padding: 100px 0;
            background-color: white;
            text-align: center;
        }

        .about-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
            text-align: center;
        }

        .about-text {
            text-align: center;
        }

        .about-text h2 {
            font-size: 2.2rem;
            margin-bottom: 20px;
            color: var(--matte-black);
            text-align: center;
        }

        .about-text p {
            margin-bottom: 20px;
            color: var(--concrete);
            text-align: center;
        }

        .about-image {
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            background-color: #f5f5f5;
            text-align: center;
        }

        .about-image img {
            width: 100%;
            height: auto;
            display: block;
        }

        /* Contact Section */
        .contact {
            padding: 100px 0;
            background-color: var(--technical-white);
            text-align: center;
        }

        .contact-container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            text-align: center;
        }

        .contact-info {
            text-align: left;
        }

        .contact-info h3 {
            font-size: 1.8rem;
            margin-bottom: 20px;
            color: var(--matte-black);
            text-align: left;
        }

        .contact-info p {
            text-align: left;
        }

        .contact-item {
            display: flex;
            align-items: flex-start;
            margin-bottom: 25px;
            text-align: left;
            justify-content: left;
        }

        .contact-icon {
            background-color: var(--anthracite);
            color: white;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 15px;
            flex-shrink: 0;
        }

        .contact-form {
            background-color: white;
            padding: 40px;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            text-align: center;
        }

        .form-group {
            margin-bottom: 20px;
            text-align: left;
        }

        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
            color: var(--anthracite);
            text-align: left;
        }

        .form-control {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid var(--light-gray);
            border-radius: 4px;
            font-size: 16px;
            transition: border 0.3s;
        }

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

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

        /* Footer */
        footer {
            background-color: var(--matte-black);
            color: var(--light-gray);
            padding: 60px 0 30px;
            text-align: center;
        }

        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
            text-align: center;
        }

        .footer-about {
            text-align: center;
        }

        .footer-logo-container {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
        }

        .footer-logo-image {
            max-width: 200px;
            height: auto;
            margin-bottom: 15px;
        }

        .footer-logo-main {
            font-size: 28px;
            font-weight: 700;
            color: white;
            margin-bottom: 5px;
            display: block;
            line-height: 1;
            letter-spacing: 1px;
            text-align: center;
        }

        .footer-logo-main span {
            color: var(--rust-orange);
        }

        .footer-logo-subtitle {
            color: var(--light-gray);
            font-size: 11px;
            letter-spacing: 1.5px;
            margin-top: 2px;
            font-weight: 500;
            text-transform: uppercase;
            text-align: center;
        }

        .footer-about p {
            margin-bottom: 20px;
            margin-top: 10px;
            text-align: center;
        }

        .footer-links h4,
        .footer-services h4 {
            color: white;
            margin-bottom: 20px;
            font-size: 1.2rem;
            text-align: center;
        }

        .footer-links ul,
        .footer-services ul {
            list-style: none;
            text-align: center;
        }

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

        .footer-links a,
        .footer-services a {
            color: var(--light-gray);
            text-decoration: none;
            transition: color 0.3s;
        }

        .footer-links a:hover,
        .footer-services a:hover {
            color: var(--rust-orange);
        }

        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: var(--concrete);
            font-size: 0.9rem;
        }

        /* Responsive Design */
        @media (max-width: 992px) {

            .about-content,
            .contact-container {
                grid-template-columns: 1fr;
                text-align: center;
            }

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

            .projects-grid {
                grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            }

            .logo-main {
                font-size: 24px;
            }

            .logo-subtitle {
                font-size: 10px;
            }

            .whatsapp-qr-container {
                flex-direction: column;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                position: fixed;
                top: 90px;
                left: -100%;
                width: 100%;
                background-color: var(--matte-black);
                flex-direction: column;
                align-items: center;
                padding: 30px 0;
                transition: left 0.3s;
                box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
            }

            .nav-links.active {
                left: 0;
            }

            .nav-links li {
                margin: 15px 0;
            }

            .mobile-menu-btn {
                display: block;
            }

            .hero {
                padding: 150px 0 80px;
                margin-top: 80px;
            }

            .hero h1 {
                font-size: 2rem;
            }

            .section-title h2 {
                font-size: 2rem;
            }

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

            .logo-main {
                font-size: 22px;
            }

            .logo-subtitle {
                font-size: 9px;
            }

            .header-container {
                padding: 12px 0;
            }

            .whatsapp-btn {
                width: 50px;
                height: 50px;
                font-size: 24px;
            }

            .whatsapp-float {
                bottom: 20px;
                right: 20px;
            }
        }

        @media (max-width: 480px) {
            .logo-main {
                font-size: 20px;
            }

            .logo-subtitle {
                font-size: 8px;
                letter-spacing: 1px;
            }

            .hero {
                margin-top: 75px;
            }

            .whatsapp-btn {
                width: 45px;
                height: 45px;
                font-size: 22px;
            }
        }

        /* Utility Classes */
        .hidden {
            display: none !important;
        }

        .text-center {
            text-align: center;
        }

        .mt-20 {
            margin-top: 20px;
        }

        .mt-40 {
            margin-top: 40px;
        }

        .mb-20 {
            margin-bottom: 20px;
        }

        .mb-40 {
            margin-bottom: 40px;
        }

        /* Success Message */
        .success-message {
            background-color: #d4edda;
            color: #155724;
            padding: 15px;
            border-radius: 4px;
            margin-top: 20px;
            display: none;
            text-align: center;
        }