body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 0;
    display: flex;
}

.quiz-container {
    display: flex;
    width: 100%;
    max-width: 1200px;
    margin: 50px auto;
    padding: 20px;
    background-color: #fff;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    border-radius: 10px;
}

.quiz-content {
    flex: 2;
}

.quiz-sidebar {
    flex: 1;
    margin-left: 30px;
}

.quiz-sidebar h2 {
    text-align: center;
}

.progress-bar {
    width: 100%;
    height: 20px;
    background-color: #ddd;
    border-radius: 10px;
    margin-bottom: 10px;
    overflow: hidden;
}

#progress-fill {
    height: 100%;
    width: 0%;
    background-color: #4CAF50;
    transition: width 0.3s ease-in-out;
}

.quiz-sidebar ul {
    list-style-type: none;
    padding: 0;
}

.quiz-sidebar ul li {
    font-size: 18px;
    padding: 10px;
    border: 1px solid #ccc;
    margin-bottom: 5px;
    border-radius: 5px;
    background-color: #f4f4f4;
    cursor: pointer