body {
            background-color: #0a0a0a;
            color: #ffffff;
            font-family: 'Arial', sans-serif;
        }
        .quiz-container {
            background-color: #1a1a1a;
            border: 2px solid #333333;
            box-shadow: 0 0 15px rgba(255, 255, 255, 0.1);
        }
        .answer-btn {
            transition: all 0.3s ease;
        }
        .answer-btn:hover {
            background-color: #333333;
            transform: scale(1.02);
        }
        .correct {
            background-color: #1a472a !important;
        }
        .wrong {
            background-color: #4a1f1f !important;
        }
        .progress-bar {
            height: 10px;
            background-color: #333333;
            border-radius: 5px;
            overflow: hidden;
        }
        .progress-fill {
            height: 100%;
            background-color: #666666;
            transition: width 0.5s ease;
        }
        .static-effect {
            animation: static 0.1s infinite;
        }
        @keyframes static {
            0% { opacity: 0.9; }
            50% { opacity: 1; }
            100% { opacity: 0.9; }
        }