:root {
            --primary-color: #0b5134;
            --secondary-color: #0a562d84;
            --accent-color: #3498db;
            --light-color: #ecf0f1;
            --dark-color: #2c3e50;
            --text-color: #333;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: #f9f9f9;
        }
        
        header {
            background-color: var(--primary-color);
            color: white;
            padding: 20px 0;
            text-align: center;
        }
        
        .header-content {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        .centered-image {
            max-width: 100%;
            height: 120px;
            width: 800px;
            border-radius: 8px;
            box-shadow: var(--shadow);
            margin-bottom: 0px;
        }
        
        h1 {
            font-size: 2.5rem;
            margin-bottom: 10px;
        }
        
        nav {
            background-color: var(--secondary-color);
            padding: 15px 0;
            position: sticky;
            top: 0;
            z-index: 100;
            text-align: center;
        }
        
        nav a {
            color: white;
            text-decoration: none;
            padding: 10px 15px;
            margin: 0 5px;
            font-weight: 500;
            transition: var(--transition);
            border-radius: 4px;
        }
        
        nav a:hover, nav a.active {
            background-color: var(--primary-color);
        }
        
        .page-container {
            max-width: 1200px;
            margin: 30px auto;
            padding: 0 20px;
        }
        
        .gallery-intro {
            text-align: center;
            margin-bottom: 40px;
        }
        
        .gallery-intro h2 {
            color: var(--primary-color);
            font-size: 2rem;
            margin-bottom: 15px;
        }
        
        .gallery-intro p {
            max-width: 800px;
            margin: 0 auto;
            color: #666;
        }
        
        .gallery-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 25px;
            margin-top: 30px;
        }
        
        .gallery-item {
            position: relative;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            cursor: pointer;
            background-color: white;
        }
        
        .gallery-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
        }
        
        .gallery-item img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
            transition: var(--transition);
        }
        
        .gallery-item:hover img {
            opacity: 0.9;
        }
        
        .gallery-caption {
            padding: 12px 15px;
            background-color: white;
            font-weight: 500;
            color: var(--primary-color);
        }
        
        .download-btn {
            position: absolute;
            top: 10px;
            right: 10px;
            background-color: rgba(255, 255, 255, 0.9);
            border: none;
            width: 30px;
            height: 30px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            opacity: 0;
            transition: var(--transition);
            font-weight: bold;
        }
        
        .gallery-item:hover .download-btn {
            opacity: 1;
        }
        
        .download-btn:hover {
            background-color: var(--accent-color);
            color: white;
        }
        
        /* Lightbox styles */
        .lightbox {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.9);
            z-index: 1000;
            justify-content: center;
            align-items: center;
        }
        
        .lightbox-content {
            max-width: 90%;
            max-height: 90%;
            text-align: center;
        }
        
        .lightbox-content img {
            max-width: 100%;
            max-height: 80vh;
            object-fit: contain;
            border-radius: 4px;
        }
        
        .lightbox-caption {
            color: white;
            margin-top: 15px;
            font-size: 1.2rem;
        }
        
        .close-btn {
            position: absolute;
            top: 20px;
            right: 30px;
            color: white;
            font-size: 2.5rem;
            font-weight: bold;
            background: none;
            border: none;
            cursor: pointer;
            transition: var(--transition);
        }
        
        .close-btn:hover {
            color: var(--accent-color);
        }
        
        .nav-btn {
            position: absolute;
            top: 50%;
            transform: translateY(-50%);
            color: white;
            font-size: 2rem;
            background-color: rgba(0, 0, 0, 0.5);
            border: none;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            cursor: pointer;
            transition: var(--transition);
        }
        
        .prev-btn {
            left: 30px;
        }
        
        .next-btn {
            right: 30px;
        }
        
        .nav-btn:hover {
            background-color: var(--accent-color);
        }
        
        footer {
            background-color: var(--primary-color);
            color: white;
            text-align: center;
            padding: 25px;
            margin-top: 50px;
        }
        
        /* Responsive design */
        @media (max-width: 768px) {
            nav {
                display: flex;
                flex-wrap: wrap;
                justify-content: center;
            }
            
            nav a {
                margin: 5px;
                padding: 8px 12px;
                font-size: 0.9rem;
            }
            
            h1 {
                font-size: 2rem;
            }
            
            .gallery-grid {
                grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
                gap: 15px;
            }
            
            .nav-btn {
                width: 40px;
                height: 40px;
                font-size: 1.5rem;
            }
            
            .prev-btn {
                left: 10px;
            }
            
            .next-btn {
                right: 10px;
            }
        }