:root {
            --primary-color: #0A192F;
            --accent-color: #00B4D8;
            --accent-hover: #0096C7;
            --text-dark: #333333;
            --text-light: #FFFFFF;
            --bg-light: #F3F4F6;
            --border-color: #E5E7EB;
        }

        html.dark-theme {
            --primary-color: #93C5FD;
            --accent-color: #38BDF8;
            --accent-hover: #7DD3FC;
            --text-dark: #F3F4F6;
            --text-light: #111827;
            --bg-light: #1F2937;
            --border-color: #374151;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Inter', sans-serif;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            line-height: 1.6;
            color: var(--text-dark);
            background-color: var(--text-light);
            transition: background-color 0.3s ease, color 0.3s ease;
        }

        a {
            text-decoration: none;
            color: inherit;
        }

        header {
            background-color: var(--text-light);
            color: var(--primary-color);
            padding: 1rem 5%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            transition: background-color 0.3s ease, color 0.3s ease;
        }

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

        .logo img {
            max-height: 80px;
            width: auto;
            display: block;
            transition: max-height 0.3s ease;
        }

        nav ul {
            list-style: none;
            display: flex;
            align-items: center;
            gap: 2rem;
            font-weight: 600;
        }

        nav a:hover {
            color: var(--accent-color);
            transition: color 0.3s;
        }

        .hero {
            background: linear-gradient(rgba(10, 25, 47, 0.8), rgba(10, 25, 47, 0.8)), url('hero_bg.webp') center/cover;
            height: 80vh;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            text-align: center;
            padding: 0 5%;
            color: #FFFFFF;
        }

        .hero h1 {
            font-size: 3rem;
            margin-bottom: 1rem;
            max-width: 800px;
        }

        .hero p {
            font-size: 1.2rem;
            margin-bottom: 2rem;
            max-width: 600px;
        }

        .cta-buttons {
            display: flex;
            gap: 1rem;
        }

        .btn {
            padding: 0.8rem 2rem;
            border-radius: 5px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
        }

        .btn-primary {
            background-color: var(--accent-color);
            color: var(--text-light);
            border: none;
        }

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

        .btn-secondary {
            background-color: transparent;
            color: #FFFFFF;
            border: 2px solid #FFFFFF;
        }

        .btn-secondary:hover {
            background-color: #FFFFFF;
            color: #0A192F;
        }

        .section {
            padding: 5rem 5%;
        }

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

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

        .service-card {
            background: var(--bg-light);
            padding: 2rem;
            border-radius: 8px;
            text-align: left;
            transition: transform 0.3s;
            border-bottom: 4px solid transparent;
        }

        .service-card:hover {
            transform: translateY(-5px);
            border-bottom: 4px solid var(--accent-color);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
        }

        .service-icon {
            font-size: 2.5rem;
            margin-bottom: 1rem;
        }

        .service-card h3 {
            margin-bottom: 1rem;
            color: var(--primary-color);
            font-size: 1.3rem;
        }

        .service-card ul {
            list-style-type: disc;
            margin-left: 1.5rem;
            color: var(--text-dark);
            font-size: 0.95rem;
        }

        .service-card li {
            margin-bottom: 0.5rem;
        }

        .catalog-container {
            max-width: 1000px;
            margin: 0 auto;
            background: var(--bg-light);
            border-radius: 8px;
            overflow: hidden;
            border: 1px solid var(--border-color);
        }

        details summary {
            padding: 1.5rem;
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--primary-color);
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background-color: var(--text-light);
        }

        details summary::-webkit-details-marker {
            display: none;
        }

        details summary::after {
            content: "▼";
            font-size: 0.9rem;
            color: var(--accent-color);
            transition: transform 0.3s;
        }

        details[open] summary::after {
            transform: rotate(180deg);
        }

        .table-responsive {
            overflow-x: auto;
            padding: 0 1.5rem 1.5rem 1.5rem;
            background-color: var(--text-light);
        }

        table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
        }

        th,
        td {
            padding: 1rem;
            border-bottom: 1px solid var(--border-color);
        }

        th {
            background-color: var(--bg-light);
            color: var(--primary-color);
            font-weight: 600;
            position: sticky;
            top: 0;
        }

        tr:hover {
            background-color: #f9fafb;
        }

        .cat-n {
            color: #DC2626;
            font-weight: bold;
        }

        .cat-o {
            color: #16A34A;
            font-weight: bold;
        }

        .benefits {
            background-color: var(--bg-light);
        }

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

        .gallery-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            grid-auto-rows: 250px;
            gap: 1.5rem;
            max-width: 1000px;
            margin: 0 auto;
        }

        .gallery-item {
            position: relative;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
            cursor: pointer;
        }

        .gallery-item img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .gallery-item:hover img {
            transform: scale(1.1);
        }

        .gallery-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            background: linear-gradient(to top, rgba(10, 25, 47, 0.9), transparent);
            color: #FFFFFF;
            padding: 2rem 1.5rem 1.5rem 1.5rem;
            transform: translateY(100%);
            transition: transform 0.4s ease;
            font-weight: 600;
            font-size: 1.1rem;
        }

        .gallery-item:hover .gallery-overlay {
            transform: translateY(0);
        }

        .item-large {
            grid-column: span 2;
            grid-row: span 2;
        }

        @media (max-width: 768px) {
            .gallery-grid {
                grid-template-columns: repeat(2, 1fr);
                grid-auto-rows: 200px;
            }

            .item-large {
                grid-column: span 2;
                grid-row: span 2;
            }
        }

        @media (max-width: 480px) {
            .gallery-grid {
                grid-template-columns: 1fr;
                grid-auto-rows: 250px;
            }

            .item-large {
                grid-column: span 1;
                grid-row: span 1;
            }
        }

        .references-grid {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 1rem;
            max-width: 1000px;
            margin: 0 auto;
        }

        .reference-item {
            background-color: var(--text-light);
            border: 1px solid var(--border-color);
            padding: 1rem 1.5rem;
            border-radius: 5px;
            font-weight: 600;
            color: var(--primary-color);
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
            transition: all 0.3s;
            text-align: center;
            flex: 1 1 calc(25% - 1rem);
            min-width: 200px;
        }

        .reference-item:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 12px rgba(0, 0, 0, 0.1);
            border-color: var(--accent-color);
            color: var(--accent-color);
        }

        .contact-container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 4rem;
        }

        .contact-info h3 {
            margin-bottom: 1rem;
            color: var(--primary-color);
        }

        .contact-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        .contact-form input,
        .contact-form textarea {
            width: 100%;
            padding: 1rem;
            border: 1px solid #ccc;
            border-radius: 5px;
            font-family: inherit;
        }

        footer {
            background-color: var(--primary-color);
            color: var(--text-light);
            text-align: center;
            padding: 2rem 5%;
        }

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

        .theme-toggle {
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            padding: 0.5rem;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-color);
            transition: background-color 0.3s ease, color 0.3s ease, transform 0.3s ease;
        }

        .theme-toggle:hover {
            background-color: var(--bg-light);
            transform: scale(1.1);
        }

        @media (max-width: 768px) {
            .logo img {
                max-height: 60px;
            }

            .mobile-menu-btn {
                display: block;
                margin-left: auto;
                margin-right: 1rem;
            }

            nav ul {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: var(--text-light);
                padding: 1rem 0;
                box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
                text-align: center;
                gap: 1rem;
            }

            nav ul.show {
                display: flex;
            }

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

            .contact-container {
                grid-template-columns: 1fr;
            }

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

            .reference-item {
                flex: 1 1 100%;
            }
        }

        /* --- LIGHTBOX --- */
        .lightbox {
            display: none;
            position: fixed;
            z-index: 2000;
            left: 0;
            top: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.9);
            justify-content: center;
            align-items: center;
            flex-direction: column;
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .lightbox.show {
            display: flex;
            opacity: 1;
        }

        .lightbox-content {
            max-width: 90%;
            max-height: 80vh;
            border-radius: 8px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
            animation: zoomIn 0.3s ease;
        }

        @keyframes zoomIn {
            from {
                transform: scale(0.9);
            }

            to {
                transform: scale(1);
            }
        }

        .lightbox-close {
            position: absolute;
            top: 20px;
            right: 35px;
            color: #f1f1f1;
            font-size: 40px;
            font-weight: bold;
            cursor: pointer;
            transition: color 0.3s;
        }

        .lightbox-close:hover,
        .lightbox-close:focus {
            color: var(--accent-color);
        }

        #lightbox-caption {
            margin-top: 15px;
            color: #FFFFFF;
            font-size: 1.2rem;
            font-weight: 600;
        }