:root {
            /* Material You dynamic color system */
            --primary: #6750A4;
            --on-primary: #FFFFFF;
            --primary-container: #EADDFF;
            --on-primary-container: #21005D;
            --secondary: #625B71;
            --on-secondary: #FFFFFF;
            --secondary-container: #E8DEF8;
            --on-secondary-container: #1D192B;
            --tertiary: #7D5260;
            --on-tertiary: #FFFFFF;
            --surface: #FEF7FF;
            --on-surface: #1D1B20;
            --surface-variant: #E7E0EC;
            --on-surface-variant: #49454F;
            --outline: #79747E;
            
            /* Add missing RGB values for header background */
            --surface-rgb: 254, 247, 255;
            
            --animation-speed: 0.4s;
            --border-radius: 24px;
            --elevation: 0 3px 6px rgba(0,0,0,0.1);
            --hover-elevation: 0 8px 16px rgba(0,0,0,0.15);
        }

        @media (prefers-color-scheme: dark) {
            :root {
                --primary: #D0BCFF;
                --on-primary: #381E72;
                --primary-container: #4F378B;
                --on-primary-container: #EADDFF;
                --secondary: #CCC2DC;
                --on-secondary: #332D41;
                --secondary-container: #4A4458;
                --on-secondary-container: #E8DEF8;
                --tertiary: #EFB8C8;
                --on-tertiary: #492532;
                --surface: #141218;
                --on-surface: #E6E0E9;
                --surface-variant: #49454F;
                --on-surface-variant: #CAC4D0;
                --outline: #938F99;

                /* Dark mode RGB */
                --surface-rgb: 20, 18, 24;

                --elevation: 0 6px 12px rgba(0,0,0,0.3);
                --hover-elevation: 0 12px 24px rgba(0,0,0,0.4);
            }
        }

        * {

            font-family: 'Roboto Flex', sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: var(--surface);
            color: var(--on-surface);
            line-height: 1.6;
            overflow-x: hidden;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

/* Page Transitions */
#app {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.4s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: opacity, transform;
}

#app.fade-out {
    opacity: 0;
    transform: translateY(20px);
    pointer-events: none;
}

#app.fade-in {
    opacity: 1;
    transform: translateY(0);
}        /* Ensure container is full height */
        main.responsive {
            min-height: 100vh;
            padding-top: 80px;
        }

        /* Shared button styles */
        .cta-button,
        .secondary-button {
            border: none;
            padding: 12px 24px;
            border-radius: 100px;
            font-weight: 500;
            cursor: pointer;
            transition: all var(--animation-speed);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .cta-button {
            background-color: var(--primary);
            color: var(--on-primary);
            box-shadow: var(--elevation);
        }

        .secondary-button {
            background-color: var(--secondary-container);
            color: var(--on-secondary-container);
        }

        .cta-button:hover,
        .secondary-button:hover {
            transform: translateY(-2px);
        }

        .cta-button:hover {
            background-color: var(--primary-container);
            color: var(--on-primary-container);
            box-shadow: var(--hover-elevation);
        }

        .secondary-button:hover {
            background-color: var(--secondary);
            color: var(--on-secondary);
        }

        /* Hero Section */
        .hero {
            padding: 180px 0 100px;
            position: relative;
            overflow: hidden;
        }

        .hero-content {
            max-width: 700px;
            position: relative;
            z-index: 2;
        }

        .hero h1 {
            font-size: 3.5rem;
            margin-bottom: 24px;
            line-height: 1.2;
        }

        .hero p {
            font-size: 1.25rem;
            margin-bottom: 40px;
            color: var(--on-surface-variant);
        }

        .hero-buttons {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .hero-animation {
            position: absolute;
            top: 50%;
            right: -200px;
            transform: translateY(-50%);
            width: 600px;
            height: 600px;
            border-radius: 50%;
            background: radial-gradient(circle, var(--primary) 0%, transparent 70%);
            opacity: 0.2;
            z-index: 1;
            animation: float 8s ease-in-out infinite;
        }

        .math-expression {
            position: absolute;
            top: 50%;
            right: 100px;
            transform: translateY(-50%) rotate(-5deg);
            font-size: 5rem;
            color: var(--primary);
            opacity: 0.15;
            z-index: 0;
            font-family: 'Times New Roman', serif;
            animation: pulse 4s ease-in-out infinite;
        }

        /* Features Section */
        .features {
            padding: 100px 0;
            margin: 0 20px;
        }

        .section-title {
            text-align: center;
            font-size: 2.5rem;
            margin-bottom: 60px;
            color: var(--on-surface);
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

        .feature-card,
        .device-card {
            background-color: var(--surface);
            border-radius: var(--border-radius);
            transition: all var(--animation-speed);
            box-shadow: var(--elevation);
            position: relative;
            overflow: hidden;
            padding: 25px;
        }

        .feature-card:hover,
        .device-card:hover {
            transform: translateY(-10px);
            box-shadow: var(--hover-elevation);
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(to right, var(--primary), var(--tertiary));
            transform: scaleX(0);
            transform-origin: left;
            transition: transform var(--animation-speed);
        }

        .feature-card:hover::before {
            transform: scaleX(1);
        }

        .feature-icon {
            width: 64px;
            height: 64px;
            background-color: var(--primary-container);
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            color: var(--primary);
            font-size: 1.8rem;
        }

        .feature-card h3 {
            font-size: 1.5rem;
            margin-bottom: 15px;
        }

        /* Download Section */
        .download {
            padding: 100px 0;
        }

        .devices-container {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 30px;
            margin-bottom: 60px;
        }

        .device-card {
            padding: 25px;
            width: 250px;
            text-align: center;
            cursor: pointer;
        }

        .device-image {
            height: 180px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
        }

        .device-image svg {
            width: 120px;
            height: 180px;
            fill: var(--on-surface);
        }

        .device-name {
            font-weight: 500;
            margin-bottom: 10px;
        }

        .device-status {
            font-size: 0.9rem;
            color: var(--secondary);
        }

        /* Footer */
        footer {
            background-color: var(--surface-variant);
            padding: 60px 0 30px;
            border-top-left-radius: var(--border-radius);
            border-top-right-radius: var(--border-radius);
        }

        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-column h3 {
            font-size: 1.25rem;
            margin-bottom: 20px;
            color: var(--primary);
        }

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

        .footer-links li {
            margin-bottom: 12px;
        }

        .footer-links a {
            text-decoration: none;
            color: var(--on-surface-variant);
            transition: color var(--animation-speed);
        }

        .footer-links a:hover {
            color: var(--primary);
        }

        .social-links {
            display: flex;
            gap: 15px;
            margin-top: 20px;
        }

        .social-icon {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: var(--surface);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--on-surface);
            transition: all var(--animation-speed);
        }

        .social-icon:hover {
            background-color: var(--primary);
            color: var(--on-primary);
            transform: translateY(-3px);
        }

        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid var(--outline);
            color: var(--on-surface-variant);
            font-size: 0.9rem;
        }

        /* Animations */
        @keyframes float {
            0% {
                transform: translateY(-50%) rotate(0deg);
            }
            50% {
                transform: translateY(-55%) rotate(5deg);
            }
            100% {
                transform: translateY(-50%) rotate(0deg);
            }
        }

        @keyframes pulse {
            0% {
                opacity: 0.1;
            }
            50% {
                opacity: 0.2;
            }
            100% {
                opacity: 0.1;
            }
        }

        /* Responsive Design */
        @media (max-width: 992px) {
            .hero {
                text-align: center;
            }
            
            .hero-content {
                max-width: 100%;
            }
            
            .hero-buttons {
                justify-content: center;
            }
            
            .hero-animation, .math-expression {
                display: none;
            }
            

        }

        .me{
            text-decoration: none;
            color: white;
        }