:root {
            --primary: #2563eb;
            --primary-light: #3b82f6;
            --primary-dark: #1e40af;
            --secondary: #10b981;
            --accent: #f59e0b;

            --bg: #ffffff;
            --bg-alt: #f8fafc;
            --text: #1e293b;
            --text-light: #64748b;
            --border: #e5e7eb;

            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
            --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
            --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

            --radius: 1rem;
            --radius-lg: 1.5rem;
            --radius-full: 9999px;

            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Poppins', sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.6;
            overflow-x: hidden;
            max-width: 100vw;
        }

        .container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 2rem;
            width: 100%;
            box-sizing: border-box;
        }

        /* ============================================
           NAVBAR
        ============================================ */

        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border);
            padding: 1rem 0;
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 2rem;
            flex-wrap: nowrap;
        }

        .logo {
            font-family: 'Montserrat', sans-serif;
            font-size: 1.75rem;
            font-weight: 900;
            color: var(--primary);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .logo img {
            height: 50px;
            width: auto;
            object-fit: contain;
        }

        .nav-links {
            display: flex;
            list-style: none;
            gap: 2rem;
            align-items: center;
            flex-wrap: nowrap;
        }

        .nav-links a {
            color: var(--text);
            text-decoration: none;
            font-weight: 500;
            position: relative;
            padding: 0.5rem 0;
            white-space: nowrap;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            transition: width 0.3s ease;
        }

        .nav-links a:hover::after {
            width: 100%;
        }

        .nav-dropdown {
            position: relative;
        }

        .nav-dropdown-toggle {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
        }

        .nav-dropdown-menu {
            position: absolute;
            top: calc(100% + 0.5rem);
            left: 0;
            background: white;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 0.5rem 0;
            min-width: 180px;
            box-shadow: var(--shadow);
            opacity: 0;
            visibility: hidden;
            transform: translateY(10px);
            transition: var(--transition);
            z-index: 1001;
        }

        .nav-dropdown:hover .nav-dropdown-menu,
        .nav-dropdown:focus-within .nav-dropdown-menu {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .nav-dropdown-menu a {
            display: block;
            padding: 0.5rem 1rem;
            color: var(--text);
            text-decoration: none;
        }

        .nav-dropdown-menu a:hover {
            background: var(--bg-alt);
        }

        .mobile-auth {
            display: none !important;
        }

        .desktop-auth {
            display: flex;
        }

        .auth-buttons {
            display: flex;
            gap: 1rem;
            align-items: center;
            flex-wrap: nowrap;
        }

        .btn {
            padding: 0.875rem 1.75rem;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 0.95rem;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
            white-space: nowrap;
        }

        .btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(255, 255, 255, 0.15);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.4s ease;
        }

        .btn:hover::before {
            transform: scaleX(1);
        }

        .btn span,
        .btn i {
            position: relative;
            z-index: 1;
        }

        .btn-student {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: white;
            box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
        }

        .btn-student:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(37, 99, 235, 0.4);
        }

        .btn-teacher {
            background: linear-gradient(135deg, var(--secondary), #34d399);
            color: white;
            box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
        }

        .btn-teacher:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(16, 185, 129, 0.4);
        }

        .btn-parent {
            background: linear-gradient(135deg, #8b5cf6, #a78bfa);
            color: white;
            box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
        }

        .btn-parent:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(139, 92, 246, 0.4);
        }

        .mobile-toggle {
            display: none;
            flex-direction: column;
            gap: 6px;
            cursor: pointer;
            padding: 0.5rem;
            background: var(--bg-alt);
            border: 2px solid var(--border);
            border-radius: 8px;
            z-index: 1002;
            position: fixed;
            right: 1rem;
            top: 0.75rem;
            transition: var(--transition);
        }

        .mobile-toggle:hover {
            background: var(--primary);
            border-color: var(--primary);
        }

        .mobile-toggle:hover span {
            background: white;
        }

        .mobile-toggle span {
            width: 24px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: var(--transition);
        }

        .mobile-toggle.active {
            background: var(--primary);
            border-color: var(--primary);
        }

        .mobile-toggle.active span {
            background: white;
        }

        .mobile-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(6px, 6px);
        }

        .mobile-toggle.active span:nth-child(2) {
            opacity: 0;
        }

        .mobile-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(6px, -6px);
        }

        /* ============================================
           HERO SECTION
        ============================================ */

        .hero {
            padding: 150px 0 80px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: white;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="rgba(255,255,255,0.1)" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,122.7C672,117,768,139,864,154.7C960,171,1056,181,1152,165.3C1248,149,1344,107,1392,85.3L1440,64L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>');
            background-size: cover;
            background-position: bottom;
            opacity: 0.3;
        }

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

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 1.5rem;
            background: rgba(255, 255, 255, 0.2);
            border: 2px solid rgba(255, 255, 255, 0.3);
            border-radius: var(--radius-full);
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 1.5rem;
            backdrop-filter: blur(10px);
        }

        .hero-title {
            font-family: 'Montserrat', sans-serif;
            font-size: 3.5rem;
            font-weight: 900;
            line-height: 1.1;
            margin-bottom: 1rem;
        }

        .hero-description {
            font-size: 1.25rem;
            opacity: 0.95;
            max-width: 700px;
            margin: 0 auto;
        }

        /* ============================================
           GALLERY FILTERS
        ============================================ */

        .gallery-filters {
            padding: 60px 0 40px;
            background: var(--bg-alt);
        }

        .filter-buttons {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 1rem;
        }

        .filter-btn {
            padding: 0.75rem 2rem;
            background: white;
            border: 2px solid var(--border);
            border-radius: var(--radius-full);
            color: var(--text);
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: var(--transition);
        }

        .filter-btn:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-2px);
        }

        .filter-btn.active {
            background: var(--primary);
            border-color: var(--primary);
            color: white;
            box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
        }

        /* ============================================
           GALLERY GRID
        ============================================ */

        .gallery-section {
            padding: 60px 0 100px;
            background: var(--bg-alt);
        }

        .gallery-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 1.5rem;
            margin-top: 2rem;
        }

        .gallery-item {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            cursor: pointer;
            aspect-ratio: 4/3;
            background: white;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }

        .gallery-item:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-xl);
        }

        .gallery-item img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

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

        /* Overlay text removed per request */

        /* ============================================
           LIGHTBOX MODAL
        ============================================ */

        .lightbox {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.95);
            z-index: 9999;
            display: none;
            align-items: center;
            justify-content: center;
            padding: 2rem;
        }

        .lightbox.active {
            display: flex;
        }

        .lightbox-content {
            position: relative;
            max-width: 90vw;
            max-height: 90vh;
            animation: zoomIn 0.3s ease;
        }

        @keyframes zoomIn {
            from {
                opacity: 0;
                transform: scale(0.8);
            }

            to {
                opacity: 1;
                transform: scale(1);
            }
        }

        .lightbox img {
            max-width: 100%;
            max-height: 90vh;
            object-fit: contain;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-xl);
        }

        .lightbox-close {
            position: absolute;
            top: -50px;
            right: 0;
            width: 40px;
            height: 40px;
            background: white;
            border: none;
            border-radius: 50%;
            color: var(--text);
            font-size: 1.5rem;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }

        .lightbox-close:hover {
            background: var(--primary);
            color: white;
            transform: rotate(90deg);
        }

        .lightbox-nav {
            position: absolute;
            top: 50%;
            transform: translateY(-50%);
            width: 50px;
            height: 50px;
            background: rgba(255, 255, 255, 0.9);
            border: none;
            border-radius: 50%;
            color: var(--text);
            font-size: 1.5rem;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }

        .lightbox-nav:hover {
            background: var(--primary);
            color: white;
        }

        .lightbox-prev {
            left: -70px;
        }

        .lightbox-next {
            right: -70px;
        }

        .lightbox-info {
            position: absolute;
            bottom: -80px;
            left: 0;
            right: 0;
            text-align: center;
            color: white;
        }

        .lightbox-info h3 {
            font-size: 1.5rem;
            margin-bottom: 0.5rem;
        }

        .lightbox-info p {
            font-size: 1rem;
            opacity: 0.8;
        }

        /* ============================================
           FOOTER
        ============================================ */

        .footer {
            background: var(--text);
            color: white;
            padding: 4rem 0 2rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
            margin-bottom: 3rem;
        }

        .footer-brand h3 {
            font-family: 'Montserrat', sans-serif;
            font-size: 1.75rem;
            font-weight: 900;
            margin-bottom: 1rem;
            color: var(--primary-light);
        }

        .footer-brand p {
            opacity: 0.8;
            line-height: 1.8;
        }

        .footer-links h4 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
        }

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

        .footer-links li {
            margin-bottom: 0.75rem;
        }

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

        .footer-links a:hover {
            color: var(--primary-light);
            padding-left: 5px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 2rem;
            text-align: center;
            opacity: 0.7;
        }

        /* ============================================
           RESPONSIVE
        ============================================ */

        @media (max-width: 1024px) {
            .nav-links {
                display: none;
            }

            .nav-links .mobile-auth {
                display: flex !important;
            }

            .desktop-auth {
                display: none;
            }

            .mobile-toggle {
                display: flex;
            }

            .nav-links.active {
                display: flex;
                position: fixed;
                top: 0 !important;
                left: 0 !important;
                right: 0 !important;
                bottom: 0 !important;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                justify-content: center;
                align-items: center;
                gap: 2rem;
                z-index: 1001;
                padding: 2rem;
                margin: 0 !important;
                width: 100vw !important;
                height: 100vh !important;
                overflow-y: auto;
            }

            .nav-links.active a {
                font-size: 1.5rem;
                font-weight: 700;
                padding: 0.75rem 1.5rem;
                border-radius: var(--radius-full);
                transition: var(--transition);
                color: var(--text);
                text-align: center;
                width: auto;
                text-decoration: none;
            }

            .nav-links.active a::after {
                display: none;
            }

            .nav-links.active a:hover,
            .nav-links.active a.active {
                background: var(--primary);
                color: white;
                transform: scale(1.05);
                text-decoration: none;
            }

            .nav-links.active a:hover::after,
            .nav-links.active a.active::after {
                display: none;
            }

            .nav-links.active .auth-buttons {
                flex-direction: column;
                width: 85%;
                max-width: 320px;
                gap: 1rem;
            }

            .nav-links.active .auth-buttons .btn {
                width: 100%;
                justify-content: center;
                white-space: nowrap;
                padding: 1rem 1.5rem;
                font-size: 1rem;
                display: flex;
                align-items: center;
                gap: 0.75rem;
            }

            .nav-links.active .auth-buttons .btn span {
                display: inline;
                overflow: visible;
                text-overflow: clip;
            }

            .nav-links.active .auth-buttons .btn i {
                flex-shrink: 0;
            }

            .gallery-grid {
                grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
                gap: 1.5rem;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 1rem;
            }

            .hero {
                padding: 120px 0 60px;
            }

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

            .hero-description {
                font-size: 1.1rem;
            }

            .gallery-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }

            .filter-buttons {
                gap: 0.75rem;
            }

            .filter-btn {
                padding: 0.625rem 1.5rem;
                font-size: 0.875rem;
            }

            .lightbox-prev {
                left: 10px;
            }

            .lightbox-next {
                right: 10px;
            }

            .lightbox-nav {
                width: 40px;
                height: 40px;
                font-size: 1.25rem;
            }

            .lightbox-info {
                position: static;
                margin-top: 1rem;
            }
        }