:root {
            --primary: #2563eb;
            --primary-hover: #1d4ed8;
            --primary-light: rgba(37, 99, 235, 0.1);
            --secondary: #64748b;
            --background: #ffffff;
            --card-background: #f8fafc;
            --glass-background: rgba(255, 255, 255, 0.7);
            --glass-background-dark: rgba(30, 41, 59, 0.7);
            --border: #e2e8f0;
            --text: #1e293b;
            --text-secondary: #64748b;
            --success: #10b981;
            --error: #ef4444;
            --warning: #f59e0b;
            --gradient-start: #3b82f6;
            --gradient-end: #8b5cf6;
        }

        .dark {
            --primary: #3b82f6;
            --primary-hover: #60a5fa;
            --primary-light: rgba(59, 130, 246, 0.1);
            --secondary: #94a3b8;
            --background: #0f172a;
            --card-background: #1e293b;
            --glass-background: rgba(30, 41, 59, 0.7);
            --glass-background-dark: rgba(15, 23, 42, 0.7);
            --border: #334155;
            --text: #f8fafc;
            --text-secondary: #cbd5e1;
            --success: #10b981;
            --error: #ef4444;
            --warning: #f59e0b;
            --gradient-start: #3b82f6;
            --gradient-end: #8b5cf6;
        }

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

        body {
            font-family: 'Inter', sans-serif;
            background-color: var(--background);
            color: var(--text);
            line-height: 1.6;
            transition: background-color 0.3s, color 0.3s;
            overflow-x: hidden;
        }

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

        header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1.5rem 0;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            backdrop-filter: blur(10px);
            background: var(--glass-background);
            border-bottom: 1px solid var(--border);
            transition: all 0.3s ease;
        }

        .dark header {
            background: var(--glass-background-dark);
        }

        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 700;
            font-size: 1.5rem;
            color: var(--primary);
        }

        .logo i {
            font-size: 1.8rem;
        }

        .nav-links {
            display: flex;
            gap: 2rem;
        }

        .nav-link {
            color: var(--text);
            text-decoration: none;
            font-weight: 500;
            transition: color 0.2s;
            position: relative;
        }

        .nav-link:hover {
            color: var(--primary);
        }

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--primary);
            transition: width 0.3s;
        }

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

        .theme-toggle {
            background: transparent;
            border: none;
            color: var(--text);
            cursor: pointer;
            font-size: 1.5rem;
            transition: color 0.2s;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .theme-toggle:hover {
            color: var(--primary);
        }

        .mobile-menu-btn {
            display: none;
            background: transparent;
            border: none;
            color: var(--text);
            font-size: 1.5rem;
            cursor: pointer;
        }

        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            padding-top: 80px;
            position: relative;
            overflow: hidden;
        }

        .hero-content {
            max-width: 600px;
            z-index: 1;
        }

        .hero h1 {
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            background: linear-gradient(to right, var(--gradient-start), var(--gradient-end));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .hero p {
            font-size: 1.2rem;
            margin-bottom: 2rem;
            color: var(--text-secondary);
        }

        .hero-buttons {
            display: flex;
            gap: 1rem;
            margin-bottom: 2rem;
        }

        .btn {
            padding: 0.75rem 1.5rem;
            border-radius: 0.5rem;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.2s;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            text-decoration: none;
        }

        .btn-primary {
            background-color: var(--primary);
            color: white;
            border: none;
        }

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

        .btn-outline {
            background-color: transparent;
            border: 1px solid var(--border);
            color: var(--text);
        }

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

        .hero-image {
            position: absolute;
            right: -100px;
            top: 50%;
            transform: translateY(-50%);
            width: 600px;
            height: 600px;
            background: linear-gradient(45deg, var(--gradient-start), var(--gradient-end));
            border-radius: 50%;
            opacity: 0.1;
            filter: blur(100px);
            animation: pulse 8s infinite alternate;
        }

        @keyframes pulse {
            0% {
                transform: translateY(-50%) scale(1);
                opacity: 0.1;
            }
            100% {
                transform: translateY(-50%) scale(1.2);
                opacity: 0.2;
            }
        }

        .particles-container {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            overflow: hidden;
            z-index: 0;
        }

        .particle {
            position: absolute;
            background-color: var(--primary);
            border-radius: 50%;
            opacity: 0.3;
        }

        .features {
            padding: 6rem 0;
            position: relative;
        }

        .section-title {
            text-align: center;
            margin-bottom: 3rem;
        }

        .section-title h2 {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 1rem;
            background: linear-gradient(to right, var(--gradient-start), var(--gradient-end));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            display: inline-block;
        }

        .section-title p {
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto;
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }

        .feature-card {
            background: var(--glass-background);
            backdrop-filter: blur(10px);
            border-radius: 1rem;
            padding: 2rem;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
            border: 1px solid var(--border);
            transition: all 0.3s ease;
        }

        .dark .feature-card {
            background: var(--glass-background-dark);
        }

        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        }

        .feature-icon {
            width: 60px;
            height: 60px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin-bottom: 1.5rem;
        }

        .feature-card h3 {
            font-size: 1.5rem;
            margin-bottom: 1rem;
        }

        .feature-card p {
            color: var(--text-secondary);
        }

        .simulator {
            padding: 6rem 0;
            position: relative;
        }

        .card {
            background: var(--glass-background);
            backdrop-filter: blur(10px);
            border-radius: 1rem;
            overflow: hidden;
            margin-bottom: 2rem;
            border: 1px solid var(--border);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
        }

        .dark .card {
            background: var(--glass-background-dark);
        }

        .tabs {
            display: flex;
            border-bottom: 1px solid var(--border);
            overflow-x: auto;
            scrollbar-width: none;
        }

        .tabs::-webkit-scrollbar {
            display: none;
        }

        .tab {
            padding: 1rem 1.5rem;
            cursor: pointer;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all 0.2s;
            border-bottom: 2px solid transparent;
            white-space: nowrap;
        }

        .tab.active {
            color: var(--primary);
            border-bottom: 2px solid var(--primary);
        }

        .tab:hover:not(.active) {
            color: var(--text);
            background-color: rgba(0, 0, 0, 0.03);
        }

        .tab-content {
            padding: 1.5rem;
            display: none;
        }

        .tab-content.active {
            display: block;
            animation: fadeIn 0.5s ease;
        }

        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(10px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .input-group {
            margin-bottom: 1.5rem;
        }

        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 500;
            color: var(--text);
        }

        input[type="text"],
        select {
            width: 100%;
            padding: 0.75rem;
            border: 1px solid var(--border);
            border-radius: 0.5rem;
            background-color: var(--background);
            color: var(--text);
            font-size: 1rem;
            transition: border-color 0.2s;
        }

        input[type="text"]:focus,
        select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
        }

        .controls {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 1rem;
            margin-bottom: 1.5rem;
        }

        .control-group {
            margin-bottom: 1rem;
        }

        .button-group {
            display: flex;
            gap: 0.75rem;
            margin-bottom: 1.5rem;
            flex-wrap: wrap;
        }

        button {
            padding: 0.75rem 1.25rem;
            border: none;
            border-radius: 0.5rem;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.2s;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .btn-secondary {
            background-color: var(--secondary);
            color: white;
        }

        .btn-secondary:hover {
            opacity: 0.9;
            transform: translateY(-2px);
        }

        .btn-outline {
            background-color: transparent;
            border: 1px solid var(--border);
            color: var(--text);
        }

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

        .visualization {
            margin-top: 2rem;
        }

        .canvas-container {
            position: relative;
            width: 100%;
            height: 300px;
            background-color: var(--background);
            border: 1px solid var(--border);
            border-radius: 0.5rem;
            overflow: hidden;
        }

        canvas {
            width: 100%;
            height: 100%;
        }

        .toggle-switch {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .switch {
            position: relative;
            display: inline-block;
            width: 48px;
            height: 24px;
        }

        .switch input {
            opacity: 0;
            width: 0;
            height: 0;
        }

        .slider {
            position: absolute;
            cursor: pointer;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: var(--secondary);
            transition: .4s;
            border-radius: 24px;
        }

        .slider:before {
            position: absolute;
            content: "";
            height: 18px;
            width: 18px;
            left: 3px;
            bottom: 3px;
            background-color: white;
            transition: .4s;
            border-radius: 50%;
        }

        input:checked + .slider {
            background-color: var(--primary);
        }

        input:checked + .slider:before {
            transform: translateX(24px);
        }

        .range-control {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }

        .range-control input {
            width: 100%;
        }

        .range-value {
            font-size: 0.9rem;
            color: var(--text-secondary);
            text-align: center;
        }

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

        .comparison-item {
            background-color: var(--background);
            border: 1px solid var(--border);
            border-radius: 0.5rem;
            overflow: hidden;
        }

        .comparison-header {
            padding: 1rem;
            background-color: var(--primary-light);
            color: var(--primary);
            font-weight: 600;
            border-bottom: 1px solid var(--border);
        }

        .comparison-canvas {
            height: 150px;
            width: 100%;
        }

        .about-content {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 1.5rem;
        }

        .about-card {
            background-color: var(--background);
            border: 1px solid var(--border);
            border-radius: 0.5rem;
            padding: 1.5rem;
        }

        .about-card h3 {
            margin-bottom: 1rem;
            color: var(--primary);
        }

        .toast-container {
            position: fixed;
            bottom: 20px;
            right: 20px;
            z-index: 1000;
        }

        .toast {
            padding: 1rem 1.5rem;
            border-radius: 0.5rem;
            margin-bottom: 0.75rem;
            color: white;
            display: flex;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            animation: slideIn 0.3s ease-out;
            max-width: 350px;
        }

        .toast-error {
            background-color: var(--error);
        }

        .toast-success {
            background-color: var(--success);
        }

        .toast-warning {
            background-color: var(--warning);
        }

        .toast-close {
            background: none;
            border: none;
            color: white;
            cursor: pointer;
            font-size: 1.2rem;
            padding: 0;
            margin-left: 1rem;
        }

        @keyframes slideIn {
            from {
                transform: translateX(100%);
                opacity: 0;
            }
            to {
                transform: translateX(0);
                opacity: 1;
            }
        }

        .footer {
            background-color: var(--card-background);
            padding: 4rem 0 2rem;
            border-top: 1px solid var(--border);
        }

        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }

        .footer-column h3 {
            font-size: 1.2rem;
            margin-bottom: 1.5rem;
            color: var(--text);
        }

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

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

        .footer-links a {
            color: var(--text-secondary);
            text-decoration: none;
            transition: color 0.2s;
        }

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

        .footer-bottom {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid var(--border);
            color: var(--text-secondary);
            font-size: 0.9rem;
        }

        .social-links {
            display: flex;
            gap: 1rem;
            margin-top: 1rem;
        }

        .social-link {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.2s;
        }

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

        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2.5rem;
            }
            
            .hero-image {
                right: -200px;
                width: 400px;
                height: 400px;
            }
            
            .nav-links {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--glass-background);
                backdrop-filter: blur(10px);
                flex-direction: column;
                padding: 1rem;
                border-bottom: 1px solid var(--border);
            }
            
            .dark .nav-links {
                background: var(--glass-background-dark);
            }
            
            .nav-links.active {
                display: flex;
            }
            
            .mobile-menu-btn {
                display: block;
            }
            
            .controls {
                grid-template-columns: 1fr;
            }
            
            .about-content {
                grid-template-columns: 1fr;
            }
            
            .button-group {
                flex-direction: column;
            }
            
            button {
                width: 100%;
            }
        }

        /* Animation classes */
        .animate-fade-in {
            animation: fadeIn 1s ease;
        }

        .animate-slide-up {
            animation: slideUp 1s ease;
        }

        .animate-slide-in-right {
            animation: slideInRight 1s ease;
        }

        @keyframes slideUp {
            from {
                opacity: 0;
                transform: translateY(50px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes slideInRight {
            from {
                opacity: 0;
                transform: translateX(50px);
            }
            to {
                opacity: 1;
                transform: translateX(0);
            }
        }

        /* Dispersion effect */
        .dispersion-container {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            overflow: hidden;
            pointer-events: none;
        }

        .dispersion-dot {
            position: absolute;
            border-radius: 50%;
            background: var(--primary);
            opacity: 0.3;
            transform: translate(-50%, -50%);
        }