  display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
        }

        #quiz-container {
            background-color: #fff;
            border-radius: 10px;
            box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
            padding: 30px;
            max-width: 800px;
            width: 100%;
            margin: 20px;
        }

        h1 {
            font-family: 'Montserrat', sans-serif;
            color: #673ab7;
            text-align: 