#quiz-container {
    width: 80%;
    /* Use a high max-width for readability on large screens */
    max-width: 900px; 
    margin: 20px auto;
    padding: 20px;
    border: 1px solid #ddd;
    border-radius: 8px;
    background-color: #f9f9f9;
}

.question-block {
    margin-bottom: 20px;
    padding: 15px;
    background-color: #fff;
    border-radius: 4px;
    /* A small visual touch to separate questions */
    border-left: 5px solid #007BFF; 
}

.options label {
    display: block; /* Make each option take its own line */
    margin: 5px 0;
    cursor: pointer;
    padding: 3px 0;
}

#submit-all-btn {
    padding: 12px 20px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1.1em;
    margin-top: 20px;
}

#submit-all-btn:hover:not(:disabled) {
    background-color: #45a049;
}

.feedback {
    font-weight: bold;
    margin-top: 8px;
    padding: 5px;
    border-radius: 3px;
    /* Styles are changed dynamically by JavaScript (green/red) */
}

#score-display {
    font-size: 1.5em;
    font-weight: bold;
    color: #333;
    margin-top: 20px;
    padding: 10px;
    border: 2px dashed #007BFF;
    text-align: center;
}