:root {
            --primary-color: #6C63FF;
            --primary-dark: #554FD8;
            --secondary-color: #FF6584;
            --dark-bg: #121826;
            --dark-card: #1A2035;
            --light-bg: #F8FAFF;
            --light-card: #FFFFFF;
            --text-dark: #2D3748;
            --text-light: #718096;
            --border-color: #E2E8F0;
            --success-color: #10B981;
            --warning-color: #F59E0B;
            --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            --shadow-dark: 0 10px 30px rgba(0, 0, 0, 0.3);
            --radius: 16px;
            --radius-sm: 8px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            -webkit-tap-highlight-color: transparent;
        }

        html {
            font-size: 16px;
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Inter', 'Tajawal', sans-serif;
            background: linear-gradient(135deg, var(--dark-bg) 0%, #1e1b4b 100%);
            color: white;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            line-height: 1.6;
            overflow-x: hidden;
            padding: 0;
            transition: var(--transition);
        }

        body.light-mode {
            background: linear-gradient(135deg, var(--light-bg) 0%, #E6F0FF 100%);
            color: var(--text-dark);
        }

        /* Preloader */
        .preloader {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: var(--dark-bg);
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            z-index: 9999;
            transition: opacity 0.5s ease;
        }

        .preloader-logo {
            width: 120px;
            margin-bottom: 2rem;
            opacity: 0.9;
        }

        .spinner {
            width: 50px;
            height: 50px;
            border: 3px solid rgba(255, 255, 255, 0.1);
            border-top-color: var(--primary-color);
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }

        @keyframes spin {
            to { transform: rotate(360deg); }
        }

        /* Header */
        .header {
            width: 100%;
            padding: 1.25rem 1.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            position: relative;
            z-index: 100;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            text-decoration: none;
            color: white;
            font-weight: 700;
            font-size: 1.25rem;
        }

        .brand-logo img {
            height: 32px;
            width: auto;
        }

        .header-controls {
            display: flex;
            gap: 0.75rem;
            align-items: center;
        }

        /* Controls */
        .control-btn {
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: white;
            padding: 0.625rem 1rem;
            border-radius: var(--radius-sm);
            font-size: 0.875rem;
            font-weight: 500;
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            transition: var(--transition);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
        }

        .control-btn:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: translateY(-2px);
        }

        .control-btn:active {
            transform: translateY(0);
        }

        body.light-mode .control-btn {
            background: rgba(255, 255, 255, 0.8);
            border-color: var(--border-color);
            color: var(--text-dark);
        }

        #language-select {
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: white;
            padding: 0.625rem 1rem;
            border-radius: var(--radius-sm);
            font-size: 0.875rem;
            font-weight: 500;
            cursor: pointer;
            min-width: 140px;
            transition: var(--transition);
            backdrop-filter: blur(10px);
        }

        body.light-mode #language-select {
            background: rgba(255, 255, 255, 0.8);
            border-color: var(--border-color);
            color: var(--text-dark);
        }

        /* Main Content */
        .main-content {
            flex: 1;
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 1.5rem;
            display: flex;
            flex-direction: column;
            align-items: center;
        }

        .page-header {
            text-align: center;
            margin-bottom: 3rem;
            max-width: 800px;
        }

        .page-header h1 {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 1rem;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .page-subtitle {
            font-size: 1.125rem;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 0.5rem;
        }

        body.light-mode .page-subtitle {
            color: var(--text-light);
        }

        /* Apps Grid */
        .apps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 1.5rem;
            width: 100%;
            max-width: 1200px;
        }

        .app-card {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius);
            padding: 2rem 1.5rem;
            transition: var(--transition);
            cursor: pointer;
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            position: relative;
            overflow: hidden;
            min-height: 280px;
            backdrop-filter: blur(10px);
        }

        .app-card:hover {
            transform: translateY(-8px);
            border-color: var(--primary-color);
            box-shadow: 0 20px 40px rgba(108, 99, 255, 0.2);
            background: rgba(255, 255, 255, 0.1);
        }

        .app-card:active {
            transform: translateY(-4px);
        }

        body.light-mode .app-card {
            background: white;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow);
        }

        body.light-mode .app-card:hover {
            box-shadow: 0 20px 40px rgba(108, 99, 255, 0.15);
            border-color: var(--primary-color);
        }

        .app-icon {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
            font-size: 1.75rem;
            color: white;
            transition: var(--transition);
        }

        .app-card:nth-child(1) .app-icon { background: linear-gradient(135deg, #667eea, #764ba2); }
        .app-card:nth-child(2) .app-icon { background: linear-gradient(135deg, #f093fb, #f5576c); }
        .app-card:nth-child(3) .app-icon { background: linear-gradient(135deg, #4facfe, #00f2fe); }
        .app-card:nth-child(4) .app-icon { background: linear-gradient(135deg, #43e97b, #38f9d7); }
        .app-card:nth-child(5) .app-icon { background: linear-gradient(135deg, #fa709a, #fee140); }

        .app-title {
            font-size: 1.25rem;
            font-weight: 600;
            margin-bottom: 0.75rem;
            color: white;
        }

        body.light-mode .app-title {
            color: var(--text-dark);
        }

        .app-description {
            font-size: 0.875rem;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 1.5rem;
            line-height: 1.5;
        }

        body.light-mode .app-description {
            color: var(--text-light);
        }

        .app-badge {
            position: absolute;
            top: 1rem;
            right: 1rem;
            background: var(--primary-color);
            color: white;
            padding: 0.25rem 0.75rem;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
        }

        .app-cta {
            margin-top: auto;
            color: var(--primary-color);
            font-weight: 600;
            font-size: 0.875rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            transition: var(--transition);
        }

        .app-card:hover .app-cta {
            transform: translateX(5px);
        }

        /* Footer */
        .footer {
            width: 100%;
            padding: 2rem 1.5rem;
            margin-top: 4rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            text-align: center;
        }

        body.light-mode .footer {
            border-top-color: var(--border-color);
        }

        .footer-links {
            display: flex;
            justify-content: center;
            gap: 2rem;
            margin-bottom: 1rem;
            flex-wrap: wrap;
        }

        .footer-link {
            color: rgba(255, 255, 255, 0.7);
            text-decoration: none;
            font-size: 0.875rem;
            transition: var(--transition);
        }

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

        body.light-mode .footer-link {
            color: var(--text-light);
        }

        .copyright {
            font-size: 0.875rem;
            color: rgba(255, 255, 255, 0.5);
        }

        body.light-mode .copyright {
            color: var(--text-light);
        }

        /* Mobile Menu */
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
            padding: 0.5rem;
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            html {
                font-size: 14px;
            }
            
            .header {
                padding: 1rem;
                flex-wrap: wrap;
            }
            
            .mobile-menu-btn {
                display: block;
            }
            
            .header-controls {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--dark-card);
                padding: 1rem;
                border-radius: var(--radius);
                margin: 0 1rem;
                box-shadow: var(--shadow-dark);
                z-index: 1000;
            }
            
            .header-controls.active {
                display: flex;
            }
            
            body.light-mode .header-controls {
                background: white;
                box-shadow: var(--shadow);
            }
            
            .control-btn, #language-select {
                width: 100%;
                justify-content: center;
            }
            
            .main-content {
                padding: 1rem;
            }
            
            .page-header h1 {
                font-size: 2rem;
            }
            
            .apps-grid {
                grid-template-columns: 1fr;
                gap: 1rem;
            }
            
            .app-card {
                min-height: 240px;
                padding: 1.5rem 1rem;
            }
            
            .footer-links {
                flex-direction: column;
                gap: 1rem;
            }
        }

        @media (max-width: 480px) {
            .page-header h1 {
                font-size: 1.75rem;
            }
            
            .app-icon {
                width: 56px;
                height: 56px;
                font-size: 1.5rem;
            }
            
            .footer {
                padding: 1.5rem 1rem;
            }
        }

        /* High Contrast Mode Support */
        @media (prefers-contrast: high) {
            .app-card {
                border: 2px solid currentColor;
            }
            
            .control-btn {
                border: 2px solid currentColor;
            }
        }

        /* Reduced Motion */
        @media (prefers-reduced-motion: reduce) {
            * {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
            }
            
            .app-card:hover {
                transform: none;
            }
            
            .spinner {
                animation: none;
                border-top-color: transparent;
            }
        }