/* Quiz Page Specific Styles */
        .page-header {
            text-align: center;
            padding: 2rem 0 3rem;
            color: white;
            margin-bottom: 2rem;
        }

        .page-header h1 {
            font-size: 3rem;
            margin-bottom: 1rem;
            background: linear-gradient(45deg, #ff6b6b, #ffd93d);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            animation: fadeInUp 0.8s ease;
        }

        .page-header p {
            font-size: 1.2rem;
            opacity: 0.9;
            animation: fadeInUp 0.8s ease 0.2s both;
        }

        .quiz-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 2rem;
            margin-bottom: 3rem;
        }

        .quiz-card {
            background: white;
            border-radius: 20px;
            padding: 2rem;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            position: relative;
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        .quiz-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, #667eea, #764ba2, #ff6b6b);
            animation: shimmer 2s infinite;
        }

        .quiz-card:hover {
            transform: translateY(-10px) scale(1.02);
            box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
        }

        .quiz-level {
            display: inline-block;
            padding: 0.5rem 1rem;
            border-radius: 25px;
            font-size: 0.85rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 1rem;
            background: linear-gradient(45deg, #667eea, #764ba2);
            color: white;
            box-shadow: 0 2px 10px rgba(102, 126, 234, 0.3);
        }

        .quiz-card h3 {
            font-size: 1.5rem;
            color: #2c3e50;
            margin-bottom: 1rem;
            font-weight: 700;
            line-height: 1.3;
        }

        .quiz-meta {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
            margin-bottom: 1.5rem;
            color: #6c757d;
        }

        .quiz-meta span {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.9rem;
        }

        .quiz-actions {
            display: flex;
            justify-content: center;
            margin-top: auto;
        }

        .btn-quiz {
            padding: 0.8rem 2rem;
            border: none;
            border-radius: 25px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            cursor: pointer;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
            font-size: 0.9rem;
        }

        .btn-start {
            background: linear-gradient(45deg, #ff6b6b, #ffd93d);
            color: white;
            box-shadow: 0 4px 15px rgba(255, 107, 107, 0.3);
        }

        .btn-start::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
            transition: left 0.5s;
        }

        .btn-start:hover::before {
            left: 100%;
        }

        .btn-start:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(255, 107, 107, 0.4);
        }

        /* Quiz Stats Section */
        .quiz-stats {
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.05));
            backdrop-filter: blur(10px);
            border-radius: 20px;
            padding: 2rem;
            margin-bottom: 3rem;
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: white;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 1.5rem;
            text-align: center;
        }

        .stat-item {
            padding: 1rem;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 15px;
            backdrop-filter: blur(5px);
        }

        .stat-item h4 {
            font-size: 2rem;
            margin-bottom: 0.5rem;
            background: linear-gradient(45deg, #ffd93d, #ff6b6b);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .stat-item p {
            font-size: 0.9rem;
            opacity: 0.9;
        }

        /* Filter Section */
        .quiz-filters {
            display: flex;
            justify-content: center;
            gap: 1rem;
            margin-bottom: 2rem;
            flex-wrap: wrap;
        }

        .filter-btn {
            padding: 0.7rem 1.5rem;
            border: 2px solid rgba(255, 255, 255, 0.3);
            background: rgba(255, 255, 255, 0.1);
            color: white;
            border-radius: 25px;
            cursor: pointer;
            transition: all 0.3s ease;
            backdrop-filter: blur(5px);
        }

        .filter-btn:hover,
        .filter-btn.active {
            background: rgba(255, 255, 255, 0.2);
            border-color: rgba(255, 255, 255, 0.5);
            transform: translateY(-2px);
        }

        /* Animations */
        @keyframes shimmer {
            0% { transform: translateX(-100%); }
            100% { transform: translateX(100%); }
        }

        .quiz-card {
            animation: fadeInUp 0.6s ease forwards;
            opacity: 0;
            transform: translateY(30px);
        }

        .quiz-card:nth-child(1) { animation-delay: 0.1s; }
        .quiz-card:nth-child(2) { animation-delay: 0.2s; }
        .quiz-card:nth-child(3) { animation-delay: 0.3s; }
        .quiz-card:nth-child(4) { animation-delay: 0.4s; }

        /* Mobile Responsiveness */
        @media (max-width: 768px) {
            .page-header h1 {
                font-size: 2.5rem;
            }

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

            .quiz-card {
                padding: 1.5rem;
            }

            .quiz-filters {
                flex-direction: column;
                align-items: center;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1rem;
            }
        }

        /* Dark theme enhancements */
        .quiz-card:hover {
            background: linear-gradient(145deg, #ffffff, #f8f9fa);
        }

        /* Loading states */
        .quiz-card.loading {
            pointer-events: none;
            opacity: 0.7;
        }

        .quiz-card.loading::after {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            width: 20px;
            height: 20px;
            margin: -10px 0 0 -10px;
            border: 2px solid #667eea;
            border-top: 2px solid transparent;
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }