:root {
            --primary: #0F0526;
            --secondary: #2A1B5E;
            --accent: #FF7F50;
            --complete: #4CAF50;
            --wrong: #f44336;
            --text-light: #FFFFFF;
            --text-secondary: rgba(255, 255, 255, 0.7);
            --card-bg: rgba(255, 255, 255, 0.08);
            --card-hover: rgba(255, 255, 255, 0.15);
            --card-shadow: 0 6px 12px rgba(0, 0, 0, 0.25);
            --overlay-bg: rgba(0, 0, 0, 0.9);
            --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
        }
        
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        
        body {
            font-family: 'Poppins', sans-serif;
            min-height: 100vh;
            background-color: var(--primary);
            background-image: 
                radial-gradient(circle at 20% 30%, var(--secondary) 0%, transparent 40%),
                radial-gradient(circle at 80% 70%, var(--secondary) 0%, transparent 40%),
                linear-gradient(to bottom, var(--primary), var(--primary));
            color: var(--text-light);
            line-height: 1.6;
            overflow-x: hidden;
        }
        
        /* Header Styles */
        .header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1.25rem 1.5rem;
            background: rgba(15, 5, 38, 0.8);
            backdrop-filter: blur(10px);
            position: sticky;
            top: 0;
            z-index: 100;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
        }
        
        .header-left, .header-right {
            display: flex;
            align-items: center;
            gap: 1rem;
        }
        
        .back-button {
            background: rgba(255, 255, 255, 0.1);
            color: white;
            border: none;
            border-radius: 50%;
            width: 42px;
            height: 42px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition);
        }
        
        .back-button:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: translateX(-2px);
        }
        
        .header-center {
            flex: 1;
            text-align: center;
        }
        
        .header h1 {
            margin: 0;
            font-size: 1.4rem;
            font-weight: 600;
            background: linear-gradient(90deg, var(--accent), #FF9F4B);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            letter-spacing: 0.5px;
        }
        
        .settings-button {
            background: rgba(255, 255, 255, 0.1);
            color: white;
            border: none;
            border-radius: 50%;
            width: 42px;
            height: 42px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition);
        }
        
        .settings-button:hover {
            transform: rotate(30deg);
        }
        
        .score-display {
            font-weight: 600;
            font-size: 0.95rem;
            background: rgba(255, 255, 255, 0.1);
            padding: 0.5rem 1rem;
            border-radius: 50px;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            transition: var(--transition);
            cursor: pointer;
        }
        
        .score-display::before {
            content: "🎯";
            font-size: 1rem;
        }
        
        /* Main Content Styles */
        .main-content {
            padding: 1.5rem;
            max-width: 1200px;
            margin: 0 auto;
        }
        
        .progress-container {
            background: rgba(255, 255, 255, 0.1);
            border-radius: 12px;
            padding: 1.5rem;
            margin-bottom: 2rem;
            backdrop-filter: blur(5px);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }
        
        .progress-title {
            font-size: 1.2rem;
            margin-bottom: 1rem;
            color: var(--text-light);
            text-align: center;
        }
        
        .progress-bar-container {
            height: 10px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 5px;
            overflow: hidden;
            margin-bottom: 0.5rem;
        }
        
        .progress-bar {
            height: 100%;
            background: linear-gradient(90deg, var(--accent), #FF8C5A);
            border-radius: 5px;
            transition: var(--transition);
        }
        
        .progress-text {
            display: flex;
            justify-content: space-between;
            font-size: 0.9rem;
            color: var(--text-secondary);
        }
        
        /* Level Grid */
        .level-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
            gap: 1rem;
            margin-bottom: 2rem;
        }
        
        .level-card {
            background: var(--card-bg);
            border-radius: 12px;
            padding: 1.5rem 0.5rem;
            text-align: center;
            transition: var(--transition);
            border: 1px solid rgba(255, 255, 255, 0.08);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            min-height: 100px;
            cursor: pointer;
            position: relative;
            overflow: hidden;
        }
        
        .level-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, rgba(255,255,255,0.05) 0%, transparent 100%);
            opacity: 0;
            transition: var(--transition);
        }
        
        .level-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--card-shadow);
            background: var(--card-hover);
        }
        
        .level-card:hover::before {
            opacity: 1;
        }
        
        .level-card.completed {
            background: rgba(76, 175, 80, 0.12);
            border-color: rgba(76, 175, 80, 0.3);
        }
        
        .level-card.current {
            background: rgba(255, 152, 0, 0.12);
            border-color: rgba(255, 152, 0, 0.3);
            animation: pulse 1.5s infinite;
        }
        
        @keyframes pulse {
            0%, 100% { transform: scale(1); }
            50% { transform: scale(1.05); }
        }
        
        .level-card.locked {
            background: rgba(255, 255, 255, 0.05);
            color: var(--text-secondary);
            cursor: not-allowed;
        }
        
        .level-card.locked::after {
            content: '\f023';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            font-size: 20px;
            color: var(--text-secondary);
        }
        
        .level-number {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            color: var(--text-light);
        }
        
        .level-card.locked .level-number {
            display: none;
        }
        
        .level-status {
            font-size: 0.8rem;
            font-weight: 500;
            color: var(--text-secondary);
        }
        
        .level-card.completed .level-status {
            color: var(--complete);
        }
        
        .level-card.current .level-status {
            color: #FF9800;
        }
        
        /* Completion Message */
        .completion-message {
            text-align: center;
            padding: 1.5rem;
            background: rgba(76, 175, 80, 0.15);
            border-radius: 12px;
            margin: 1.5rem 0;
            border: 1px solid var(--complete);
            color: var(--text-light);
            display: none;
        }
        
        /* Next Button */
        .next-button {
            background: linear-gradient(135deg, var(--accent), #FF8C5A);
            color: white;
            border: none;
            border-radius: 50px;
            padding: 0.9rem 1.75rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 0.75rem;
            margin: 0 auto;
            box-shadow: 0 4px 8px rgba(255, 127, 80, 0.3);
        }
        
        .next-button:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 12px rgba(255, 127, 80, 0.4);
        }
        
        /* Modal Styles */
        .modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: var(--overlay-bg);
            z-index: 1000;
            align-items: center;
            justify-content: center;
            backdrop-filter: blur(8px);
        }
        
        .modal-content {
            background: var(--primary);
            border-radius: 12px;
            padding: 2rem;
            width: 90%;
            max-width: 500px;
            max-height: 80vh;
            overflow-y: auto;
            border: 1px solid rgba(255, 255, 255, 0.1);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.4);
        }
        
        .modal-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 1.5rem;
        }
        
        .modal-title {
            font-size: 1.5rem;
            font-weight: 600;
            color: var(--accent);
        }
        
        .close-modal {
            background: none;
            border: none;
            color: var(--text-secondary);
            font-size: 1.5rem;
            cursor: pointer;
        }
        
        .score-item {
            background: rgba(255, 255, 255, 0.05);
            border-radius: 8px;
            padding: 1rem;
            margin-bottom: 1rem;
        }
        
        .score-item-title {
            font-weight: 600;
            margin-bottom: 0.5rem;
        }
        
        .score-item-value {
            font-weight: 700;
            color: var(--accent);
            margin-bottom: 0.5rem;
        }
        
        .score-item-progress {
            height: 6px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 3px;
            margin-bottom: 0.5rem;
            overflow: hidden;
        }
        
        .score-item-progress-bar {
            height: 100%;
            background: linear-gradient(90deg, var(--accent), #FF8C5A);
            border-radius: 3px;
        }
        
        /* Responsive Design */
        @media (max-width: 768px) {
            .level-grid {
                grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
            }
            
            .level-card {
                min-height: 90px;
                padding: 1rem 0.5rem;
            }
            
            .level-number {
                font-size: 1.5rem;
            }
            
            .header h1 {
                font-size: 1.2rem;
            }
            
            .score-display {
                font-size: 0.85rem;
                padding: 0.4rem 0.8rem;
            }
        }
        
        @media (max-width: 480px) {
            .level-grid {
                grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
                gap: 0.75rem;
            }
            
            .level-card {
                min-height: 80px;
            }
            
            .level-number {
                font-size: 1.3rem;
            }
            
            .header {
                padding: 1rem;
            }
            
            .header h1 {
                font-size: 1.1rem;
            }
            
            .score-display {
                display: none;
            }
        }