/* Custom CSS Variables and Keyframes */
        :root {
            /* Base Palette */
            --edu-blue: #1A73E8;
            --edu-green: #34A853;
            --edu-yellow: #FBBC04;
            --edu-red: #EA4335;
            --text-dark: #202124;
            --text-light: #5f6368;
            --text-lighter: #70757a;
            --bg-white: #ffffff;
            --bg-light-gray: #f8f9fa;
            --bg-soft-blue: #e8f0fe;
            --border-color: #dadce0;
            --border-color-light: #e8eaed;

            /* Shadows */
            --shadow-color-light: rgba(60, 64, 67, 0.1);
            --shadow-color-medium: rgba(60, 64, 67, 0.15);
            --shadow-color-hover: rgba(60, 64, 67, 0.25);

            /* Transitions & Animations */
            --transition-speed-fast: 0.2s;
            --transition-speed-medium: 0.35s;
            --transition-speed-slow: 0.6s;
            --easing-curve: cubic-bezier(0.4, 0, 0.2, 1);
            --easing-curve-bounce: cubic-bezier(0.175, 0.885, 0.32, 1.275);

            scroll-behavior: smooth;
        }

        /* Animation Keyframes */
        @keyframes fadeInSlideUp {
            from {
                opacity: 0;
                transform: translateY(40px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes subtlePulse {
            0%, 100% { transform: scale(1); }
            50% { transform: scale(1.03); }
        }

        /* Header Specific Styles */
        .header-animate {
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }
        .dropdown-menu {
            transition: all 0.3s ease-in-out;
            transform-origin: top center;
        }
        .chevron-rotate {
            transition: transform 0.3s ease-in-out;
        }
        .chevron-rotate.rotate-180 {
            transform: rotate(180deg);
        }

        /* Mobile Menu styles */
        .mobile-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100vh;
            background-color: rgba(0, 0, 0, 0.5);
            z-index: 40;
            display: none;
            opacity: 0;
            transition: opacity 0.3s ease-in-out;
        }

        .mobile-overlay.active {
            display: block;
            opacity: 1;
        }

        .mobile-menu {
            position: fixed;
            top: 0;
            right: 0;
            height: 100vh;
            width: min(85vw, 350px);
            background: white;
            box-shadow: -10px 0 25px -5px rgba(0, 0, 0, 0.1);
            transform: translateX(100%);
            transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            z-index: 100;
            overflow-y: auto;
            display: flex;
            flex-direction: column;
        }
        .mobile-menu.active {
            transform: translateX(0);
        }

        .mobile-menu-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 1.5rem;
            border-bottom: 1px solid #e5e7eb;
            background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
            position: sticky;
            top: 0;
            z-index: 10;
        }

        .mobile-menu-content {
            padding: 1rem 0;
        }

        .mobile-nav-item {
            border-bottom: 1px solid #f3f4f6;
        }

        .mobile-nav-link {
            display: block;
            padding: 1rem 1.5rem;
            font-weight: 500;
            color: #374151;
            text-decoration: none;
            transition: all 0.2s ease-in-out;
        }

        .mobile-nav-link:hover {
            background-color: #f9fafb;
            color: #1a73e8;
        }

        .mobile-dropdown-toggle {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
            padding: 1rem 1.5rem;
            background: none;
            border: none;
            font-weight: 500;
            color: #374151;
            text-align: left;
            cursor: pointer;
            transition: all 0.2s ease-in-out;
        }

        .mobile-dropdown-toggle:hover {
            background-color: #f9fafb;
            color: #1a73e8;
        }

        .mobile-dropdown-menu {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-in-out;
            background-color: #f8f9fa;
        }

        .mobile-dropdown-menu.open {
            max-height: 800px;
        }

        .mobile-dropdown-item {
            display: flex;
            align-items: center;
            padding: 0.75rem 3rem 0.75rem 2.5rem;
            font-size: 0.875rem;
            color: #6b7280;
            text-decoration: none;
            transition: all 0.2s ease-in-out;
        }

        .mobile-dropdown-item:hover {
            color: #1a73e8;
            background-color: #ffffff;
        }

        .mobile-dropdown-item i {
            width: 20px;
            margin-right: 0.75rem;
        }

        /* Hamburger Menu */
        .hamburger {
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            width: 44px;
            height: 44px;
            cursor: pointer;
            background: transparent;
            border: none;
            border-radius: 6px;
            z-index: 60;
            transition: all 0.2s ease-in-out;
        }

        .hamburger:hover {
            background-color: #f3f4f6;
        }

        .hamburger .hamburger-line {
            width: 24px;
            height: 3px;
            background: #374151;
            margin: 3px 0;
            border-radius: 2px;
            transition: all 0.3s ease-in-out;
        }

        .hamburger.active .hamburger-line:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .hamburger.active .hamburger-line:nth-child(2) {
            opacity: 0;
        }

        .hamburger.active .hamburger-line:nth-child(3) {
            transform: rotate(-45deg) translate(7px, -6px);
        }

        .close-btn {
            background: none;
            border: none;
            font-size: 1.5rem;
            color: #6b7280;
            cursor: pointer;
            padding: 0.5rem;
            border-radius: 50%;
            transition: all 0.2s ease-in-out;
        }

        .close-btn:hover {
            background-color: #f3f4f6;
            color: #374151;
        }

        /* Hide mobile menu on desktop */
        @media (min-width: 1024px) {
            .hamburger,
            .mobile-menu,
            .mobile-overlay {
                display: none !important;
            }
        }

        /* Base styles */
        body {
            font-family: 'Inter', sans-serif;
            color: var(--text-dark);
            line-height: 1.6;
            background-color: var(--bg-white);
            overflow-x: hidden;
        }

        /* Apply Google Sans to specific elements for branding consistency */
        .font-google-sans {
            font-family: 'Google Sans', Roboto, Arial, sans-serif;
        }

        /* Custom styles for pseudo-elements and complex animations/gradients */
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 5px;
            background: linear-gradient(90deg, var(--edu-blue), var(--edu-green), var(--edu-yellow), var(--edu-red));
            border-radius: 3px;
            transition: width var(--transition-speed-medium) var(--easing-curve);
        }
        .section-title:hover::after {
            width: 130px;
        }

        .learn-more-button {
            background-image: linear-gradient(to right, var(--bg-white) 50%, var(--edu-blue) 50%);
            background-size: 200% 100%;
            background-position: left bottom;
            color: var(--edu-blue);
            transition: color var(--transition-speed-medium) var(--easing-curve),
                        background-position var(--transition-speed-medium) var(--easing-curve),
                        transform var(--transition-speed-fast) var(--easing-curve),
                        box-shadow var(--transition-speed-medium) var(--easing-curve);
        }
        .learn-more-button:hover {
            background-position: right bottom;
            color: var(--bg-white);
            transform: translateY(-3px);
            box-shadow: 0 4px 12px rgba(26, 115, 232, 0.3);
        }
        .learn-more-button.primary {
            background-image: linear-gradient(to right, var(--edu-blue) 50%, var(--edu-green) 50%);
            background-position: left bottom;
            color: var(--bg-white);
            border-color: var(--edu-blue);
        }
        .learn-more-button.primary:hover {
            background-position: right bottom;
            color: var(--bg-white);
            border-color: var(--edu-green);
            box-shadow: 0 4px 15px rgba(52, 168, 83, 0.35);
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -60%;
            left: -30%;
            width: 100%;
            height: 180%;
            background: rgba(255,255,255,0.08);
            transform: rotate(30deg);
            z-index: 0;
            opacity: 0.7;
            filter: blur(15px);
            transition: transform var(--transition-speed-slow) ease-out;
        }
        .cta-section:hover::before {
            transform: rotate(40deg) scale(1.1);
        }

        /* Animation delays for staggered effects */
        .animate-delay-1 { animation-delay: 0.1s; }
        .animate-delay-2 { animation-delay: 0.2s; }
        .animate-delay-3 { animation-delay: 0.3s; }
        .animate-delay-4 { animation-delay: 0.4s; }
        .animate-delay-5 { animation-delay: 0.5s; }
        .animate-delay-6 { animation-delay: 0.6s; }
        .animate-delay-7 { animation-delay: 0.7s; }
        .animate-delay-8 { animation-delay: 0.8s; }

        /* Reduced motion preference */
        @media (prefers-reduced-motion: reduce) {
            :root {
                scroll-behavior: auto;
            }
            .animate-fade-in-slide-up {
                animation: none !important;
                opacity: 1 !important;
                transform: none !important;
            }
            .hero-logo-image, .benefit-item, .edition-card, .learn-more-button, .cta-button, .feature-icon, .benefit-icon, .section-title::after, .cta-section::before {
                transition: none !important;
                animation: none !important;
            }
            .hero-logo-image:hover, .benefit-item:hover, .benefit-icon:hover, .edition-card:hover, .feature-icon:hover, .learn-more-button:hover, .cta-button:hover {
                transform: none !important;
                box-shadow: none !important;
                border-color: var(--border-color-light) !important;
            }
            .learn-more-button { background-position: left bottom !important; }
            .learn-more-button:hover { color: var(--edu-blue) !important; }
            .learn-more-button.primary { color: var(--bg-white) !important; }
            .learn-more-button.primary:hover { color: var(--bg-white) !important; }
            .cta-section:hover::before { transform: rotate(30deg) scale(1) !important; }
        }

        /* Mobile responsive improvements */
        @media (max-width: 640px) {
            .mobile-menu {
                max-width: 100%;
            }
        }

        /* Ensure header is always on top */
        header {
            z-index: 30;
        }