:root {
            --primary-color: #006a4e;
            --primary-hover: #004d38;
            --secondary-color: #f4f7f6;
            --accent-color: #d9534f;
            --text-color: #333333;
            --border-color: #e0e0e0;
        }

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

        body {
            font-family: 'Noto Sans Bengali', 'SolaimanLipi', sans-serif !important;
            color: var(--text-color);
            background-color: #f9f9f9;
            line-height: 1.6;
        }

        /* Top Bar */
        .gov-top-bar {
            background-color: #f1f1f1;
            font-size: 13px;
            padding: 6px 10%;
            border-bottom: 1px solid var(--border-color);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .gov-top-bar a {
            color: #555;
            text-decoration: none;
            margin-left: 15px;
        }

        .gov-top-bar a:hover {
            color: var(--primary-color);
        }

        /* Header */
        header {
            background: #ffffff;
            border-bottom: 3px solid var(--primary-color);
            padding: 15px 10%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
        }

        .logo-section {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .school-logo {
            width: 65px;
            height: 65px;
            border-radius: 50%;
            object-fit: cover;
        }

        .site-title h1 {
            font-size: 22px;
            color: var(--primary-color);
            font-weight: 700;
        }

        .site-title p {
            font-size: 13px;
            color: #666;
        }

        /* Navigation */
        nav {
            background-color: var(--primary-color);
            padding: 0 10%;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
            position: relative;
            z-index: 1000;
        }

        nav ul {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
        }

        nav ul li {
            position: relative;
        }

        nav ul li a {
            display: block;
            color: #ffffff;
            padding: 12px 16px;
            text-decoration: none;
            font-size: 15px;
            white-space: nowrap;
        }

        nav ul li a:hover, nav ul li a.active {
            background-color: var(--primary-hover);
        }

        /* Main Layout */
        .container {
            max-width: 1200px;
            margin: 25px auto;
            padding: 0 15px;
        }

        .page-title {
            font-size: 24px;
            color: var(--primary-color);
            border-bottom: 2px solid var(--primary-color);
            padding-bottom: 8px;
            margin-bottom: 20px;
        }

        /* Gallery Grid */
        .gallery-album {
            margin-bottom: 35px;
        }

        .album-title {
            color: var(--primary-color);
            font-size: 20px;
            border-left: 4px solid var(--primary-color);
            margin-bottom: 15px;
        }

        .album-toggle {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 15px;
            padding: 0 12px;
            border: 0;
            background: transparent;
            color: inherit;
            font: inherit;
            text-align: left;
            cursor: pointer;
        }

        .album-toggle i {
            font-size: 16px;
        }

        .album-toggle:focus-visible {
            outline: 2px solid var(--primary-color);
            outline-offset: 3px;
        }

        .filter-container {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            margin-bottom: 25px;
        }

        .filter-btn {
            background: #ffffff;
            border: 1px solid var(--border-color);
            padding: 8px 18px;
            border-radius: 20px;
            cursor: pointer;
            font-family: inherit;
            font-size: 14px;
            color: #555;
            transition: all 0.2s ease;
        }

        .filter-btn:hover,
        .filter-btn.active {
            background-color: var(--primary-color);
            color: #ffffff;
            border-color: var(--primary-color);
        }

        .filter-btn:focus-visible {
            outline: 2px solid var(--primary-color);
            outline-offset: 2px;
        }

        .gallery-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 20px;
        }

        .gallery-grid[hidden] {
            display: none;
        }

        .gallery-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            overflow: hidden;
            box-shadow: 0 2px 5px rgba(0,0,0,0.05);
            transition: transform 0.2s, box-shadow 0.2s;
            cursor: pointer;
        }

        .gallery-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }

        .img-wrapper {
            width: 100%;
            height: 200px;
            overflow: hidden;
            background-color: #eee;
            position: relative;
        }

        .img-wrapper img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s ease;
        }

        .gallery-card:hover .img-wrapper img {
            transform: scale(1.05);
        }

        .card-caption {
            padding: 12px 15px;
        }

        .card-caption h4 {
            font-size: 15px;
            color: var(--text-color);
            margin-bottom: 4px;
        }

        .card-caption p {
            font-size: 13px;
            color: #777;
        }

        .gallery-empty {
            padding: 30px;
            text-align: center;
            color: #777;
            background: #ffffff;
            border: 1px solid var(--border-color);
        }

        /* Lightbox Modal */
        .modal {
            display: none;
            position: fixed;
            z-index: 2000;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0,0,0,0.85);
            justify-content: center;
            align-items: center;
            padding: 20px;
        }

        .modal-content {
            max-width: 800px;
            width: 100%;
            background: #ffffff;
            border-radius: 6px;
            overflow: hidden;
            position: relative;
        }

        .modal-content img {
            width: 100%;
            max-height: 500px;
            object-fit: contain;
            background-color: #000;
        }

        .modal-info {
            padding: 15px 20px;
        }

        .modal-close {
            position: absolute;
            top: 10px;
            right: 15px;
            color: #ffffff;
            font-size: 28px;
            font-weight: bold;
            cursor: pointer;
            z-index: 2001;
            background: rgba(0,0,0,0.5);
            width: 36px;
            height: 36px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* Footer */
        footer {
            background-color: #2c3e50;
            color: #ecf0f1;
            padding: 40px 10% 20px 10%;
            margin-top: 40px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }

        .footer-col h3 {
            font-size: 16px;
            border-bottom: 1px solid #4f6f8f;
            padding-bottom: 8px;
            margin-bottom: 15px;
            color: #ffffff;
        }

        .footer-col ul {
            list-style: none;
        }

        .footer-col ul li {
            margin-bottom: 8px;
        }

        .footer-col ul li a {
            color: #bdc3c7;
            text-decoration: none;
            font-size: 14px;
        }

        .footer-bottom {
            text-align: center;
            border-top: 1px solid #34495e;
            padding-top: 15px;
            font-size: 13px;
            color: #95a5a6;
        }

        @media (max-width: 768px) {
            .gov-top-bar, header, nav, footer {
                padding-left: 5%;
                padding-right: 5%;
            }
        }