.quiz-container {
    max-width: 700px;
    margin: 0 auto;
    background: #fff;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 0 15px rgba(0,0,0,.15);
}
#score-percentage {
    font-weight: 600;
    font-size: 1.1rem;
    text-align: right;
    margin-bottom: 10px;
}
.progress-bar {
    width: 100%;
    height: 10px;
    background: #ddd;
    border-radius: 5px;
    overflow: hidden;
    margin-bottom: 20px;
}
.progress {
    height: 100%;
    width: 0;
    background: #b3500f;
    transition: width .3s ease;
}
.question {
    font-size: 1.3rem;
    margin-bottom: 20px;
    transition: opacity .4s ease;
}
.question.answered {
    opacity: .6;
}
.choices button {
    width: 100%;
    padding: 12px;
    margin-bottom: 12px;
    font-size: 1rem;
    background: #b3500f;
    color: #fff;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color .3s ease;
}
.choices button:hover:not(:disabled) {
    background: #e97313;
}
.choices button.correct {
    background-color: #7ea010!important;
}
.choices button.wrong {
    background-color: #c30c4a !important;
}
#explanation {
    background: #fdf6e3;
    border-left: 5px solid #b3500f;
    padding: 12px;
    margin-top: 10px;
    font-style: italic;
    font-size: .95rem;
    display: none;
}
#nextBtn, #restartBtn {
    padding: 10px 25px;
    font-size: 1rem;
    border: none;
    border-radius: 8px;
    background: #b3500f;
    color: white;
    cursor: pointer;
    margin-top: 20px;
    display: none;
}
#nextBtn:hover, #restartBtn:hover {
    background: #e97313;
}
#result {
    display: none;
    text-align: center;
}
#result h2 {
    font-size: 2rem;
    color: #b3500f;
    margin-bottom: 15px;
}
.btn-request {
    width: auto;
    padding: 12px;
    margin: 20px auto 0;
    font-size: 1rem;
    background: #601504;
    color: #fff;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color .3s ease;
}
.btn-request:hover {
    background: #d35400;
}