.quiz-container {
    background: white;
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 500px;
    padding: 30px;
    margin: 0 auto;
    text-align: center;
    transition: all 0.3s ease;
}
.quiz-container:hover {
    box-shadow: 0 15px 35px rgba(0,0,0,0.15);
}
.chapter-header {
    background-color: #4a6cf7;
    color: white;
    padding: 10px 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-weight: 600;
    letter-spacing: 0.5px;
}
.question {
    font-size: 20px;
    color: #333;
    margin-bottom: 20px;
    font-weight: 500;
}
.options button {
    display: block;
    width: 100%;
    margin: 10px 0;
    padding: 12px;
    border: none;
    background-color: #e9ecef;
    color: #495057;
    border-radius: 8px;
    transition: all 0.3s ease;
    font-weight: 500;
}
.options button:hover {
    background-color: #4a6cf7;
    color: white;
    transform: translateY(-3px);
}
.correct {
    background-color: #2ecc71 !important;
    color: white !important;
}
.wrong {
    background-color: #e74c3c !important;
    color: white !important;
}
.score {
    margin-top: 20px;
    font-size: 18px;
    color: #4a6cf7;
    font-weight: 600;
}
.result {
    margin-top: 20px;
    font-size: 22px;
    font-weight: bold;
    color: #4a6cf7;
}
.correct-answer {
    color: #2ecc71;
    font-weight: bold;
}
.incorrect-answer {
    color: #e74c3c;
    font-weight: bold;
}
.accordion-button.correct-header {
    background-color: #dff0d8 !important;
    color: #3c763d !important;
}
.accordion-button.incorrect-header {
    background-color: #f2dede !important;
    color: #a94442 !important;
}
.quiz-controls {
    display: flex;
    justify-content: center;
    margin-top: 20px;
}
#progressBar {
    width: 100%;
    height: 10px;
    background-color: #e9ecef;
    border-radius: 5px;
    margin-bottom: 20px;
}
#progressBarFill {
    height: 100%;
    background-color: #4a6cf7;
    border-radius: 5px;
    width: 0%;
    transition: width 0.5s ease;
}