* {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: 20px;
            color: white;
        }
        
        .container {
            background-color: rgba(0, 0, 0, 0.7);
            border-radius: 15px;
            padding: 30px;
            width: 90%;
            max-width: 700px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
            text-align: center;
        }
        
        h1 {
            font-size: 2.5rem;
            margin-bottom: 20px;
            color: #ffd700;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
        }
        
        .game-info {
            display: flex;
            justify-content: space-around;
            margin-bottom: 25px;
            font-size: 1.1rem;
            background-color: rgba(255, 255, 255, 0.1);
            padding: 12px;
            border-radius: 10px;
        }
        
        .progress-bar {
            width: 100%;
            height: 10px;
            background-color: rgba(255, 255, 255, 0.2);
            border-radius: 5px;
            margin: 20px 0;
            overflow: hidden;
        }
        
        .progress-fill {
            height: 100%;
            background-color: #4CAF50;
            width: 0%;
            transition: width 0.3s ease;
        }
        
        .question-container {
            margin: 30px 0;
            padding: 25px;
            background-color: rgba(255, 255, 255, 0.1);
            border-radius: 10px;
            min-height: 150px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .question {
            font-size: 1.4rem;
            line-height: 1.6;
            color: #ffd700;
            font-weight: bold;
        }
        
        .choices {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin: 25px 0;
        }
        
        .choice-btn {
            padding: 20px 40px;
            font-size: 1.3rem;
            border: none;
            border-radius: 10px;
            cursor: pointer;
            font-weight: bold;
            transition: all 0.3s;
            min-width: 140px;
        }
        
        .true-btn {
            background-color: #4CAF50;
            color: white;
        }
        
        .true-btn:hover {
            background-color: #45a049;
            transform: scale(1.05);
        }
        
        .false-btn {
            background-color: #f44336;
            color: white;
        }
        
        .false-btn:hover {
            background-color: #da190b;
            transform: scale(1.05);
        }
        
        .choice-btn.disabled {
            opacity: 0.6;
            cursor: not-allowed;
            transform: scale(1);
        }
        
        .feedback {
            font-size: 1.3rem;
            margin: 20px 0;
            min-height: 60px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            padding: 15px;
            border-radius: 8px;
        }
        
        .feedback.correct {
            color: #4CAF50;
            background-color: rgba(76, 175, 80, 0.1);
        }
        
        .feedback.incorrect {
            color: #f44336;
            background-color: rgba(244, 67, 54, 0.1);
        }
        
        .explanation {
            margin: 20px 0;
            padding: 20px;
            background-color: rgba(255, 255, 255, 0.1);
            border-radius: 10px;
            text-align: left;
            font-style: italic;
            line-height: 1.5;
        }
        
        button {
            padding: 12px 25px;
            font-size: 1.1rem;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            font-weight: bold;
            transition: all 0.3s;
            margin: 5px;
        }
        
        #next {
            background-color: #2196F3;
            color: white;
        }
        
        #next:hover {
            background-color: #0b7dda;
        }
        
        #restart {
            background-color: #ff9800;
            color: white;
        }
        
        #restart:hover {
            background-color: #e68900;
        }
        
        .results {
            margin: 25px 0;
            padding: 30px;
            background-color: rgba(255, 255, 255, 0.1);
            border-radius: 10px;
        }
        
        .score {
            font-size: 2.5rem;
            color: #ffd700;
            margin: 15px 0;
        }
        
        .streak {
            font-size: 1.2rem;
            color: #b8b8b8;
            margin: 10px 0;
        }
        
        .instructions {
            margin-top: 25px;
            padding: 15px;
            background-color: rgba(255, 255, 255, 0.1);
            border-radius: 10px;
            text-align: left;
        }
        
        .instructions h2 {
            margin-bottom: 10px;
            color: #ffd700;
        }
        
        .instructions ul {
            padding-left: 20px;
        }
        
        .instructions li {
            margin-bottom: 8px;
        }
        
        .instructions a {
            color: #ffd700 !important;
            text-decoration: none;
        }
        
        .footer {
            margin-top: 25px;
            padding: 15px;
            text-align: center;
            color: #b8b8b8;
        }
        
        .footer a {
            color: #b8b8b8 !important;
        }
        
        @media (max-width: 600px) {
            .container {
                width: 95%;
                padding: 20px;
            }
            
            h1 {
                font-size: 2rem;
            }
            
            .choices {
                flex-direction: column;
                gap: 15px;
            }
            
            .choice-btn {
                padding: 18px 30px;
                min-width: 120px;
            }
            
            .question {
                font-size: 1.2rem;
            }
        }