/* Quiz Section Styles */
#quiz-section {
    margin: 3rem 0;
    padding: 2rem;
    background-color: #f8f9fa;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

#quiz-container {
    max-width: 800px;
    margin: 0 auto;
}

#question {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: #1a365d; /* Dark blue for better contrast */
    line-height: 1.5;
}

.btn-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.btn {
    background-color: #fff;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    padding: 1rem 1.5rem;
    font-size: 1rem;
    color: #2d3748; /* Dark gray for better readability */
    cursor: pointer;
    text-align: left;
    transition: all 0.3s ease;
    font-weight: 500; /* Slightly bolder text */
}

.btn:hover:not([disabled]) {
    background-color: #f0f0f0;
    border-color: #c0c0c0;
}

.btn.selected {
    background-color: #e3f2fd;
    border-color: #2196f3;
}

.btn.correct {
    background-color: #c8e6c9;
    border-color: #4caf50;
    color: #2e7d32;
}

.btn.incorrect {
    background-color: #ffcdd2;
    border-color: #f44336;
    color: #c62828;
}

.btn:disabled {
    cursor: not-allowed;
    opacity: 0.7;
}

.controls {
    display: flex;
    justify-content: space-between;
    margin: 1.5rem 0;
}

.controls .btn {
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-weight: 500;
    text-align: center;
}

#prev-btn {
    background-color: #e0e0e0;
    color: #333;
}

#next-btn, #submit-btn {
    background-color: #2196f3;
    color: white;
    border: none;
}

#next-btn:hover:not([disabled]), #submit-btn:hover:not([disabled]) {
    background-color: #1976d2;
}

#next-btn:disabled, #submit-btn:disabled {
    background-color: #bbdefb;
    cursor: not-allowed;
}

.explanation {
    padding: 1rem;
    margin: 1rem 0;
    border-radius: 6px;
    display: none;
}

.explanation.correct {
    background-color: #e8f5e9;
    color: #1b5e20; /* Darker green for better readability */
    border-left: 4px solid #4caf50;
    font-weight: 500;
}

.explanation.incorrect {
    background-color: #ffebee;
    color: #b71c1c; /* Darker red for better readability */
    border-left: 4px solid #f44336;
    font-weight: 500;
}

#progress {
    text-align: right;
    color: #4a5568; /* Darker gray for better visibility */
    font-size: 0.9rem;
    margin-top: 1rem;
    font-weight: 500;
}

/* Responsive Design */
@media (max-width: 768px) {
    #quiz-section {
        padding: 1rem;
    }
    
    #question {
        font-size: 1.2rem;
    }
    
    .btn {
        padding: 0.8rem 1rem;
    }
    
    .controls {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .controls .btn {
        width: 100%;
    }
}

.mcq-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid #e9ecef;
}

.mcq-header h2 {
    margin: 0;
    color: #2c3e50;
    font-size: 1.5rem;
}

.mcq-toggle {
    background: none;
    border: none;
    color: #3498db;
    cursor: pointer;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    transition: background-color 0.2s;
}

.mcq-toggle:hover {
    background-color: #e9f5fe;
}

.mcq-toggle i {
    transition: transform 0.3s;
}

.mcq-toggle.collapsed i {
    transform: rotate(-90deg);
}

.mcq-content {
    max-height: 1000px;
    overflow: hidden;
    transition: max-height 0.3s ease-in-out;
}

.mcq-content.collapsed {
    max-height: 0;
}

.mcq-item {
    margin-bottom: 1.5rem;
    padding: 1.5rem;
    background: white;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.mcq-question {
    font-weight: 600;
    margin-bottom: 1rem;
    color: #2c3e50;
}

.mcq-options {
    display: grid;
    gap: 0.75rem;
}

.mcq-option {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    background: #f8f9fa;
    border: 1px solid #dee2e6;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
}

.mcq-option:hover {
    background: #e9ecef;
    border-color: #adb5bd;
}

.mcq-option input[type="radio"] {
    margin-right: 0.75rem;
}

.mcq-feedback {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 6px;
    display: none;
}

.mcq-feedback.correct {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.mcq-feedback.incorrect {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.mcq-submit {
    display: block;
    margin: 1.5rem auto 0;
    padding: 0.75rem 2rem;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.2s;
}

.mcq-submit:hover {
    background-color: #2980b9;
}

.mcq-score {
    text-align: center;
    margin-top: 1.5rem;
    font-weight: 600;
    font-size: 1.1rem;
    display: none;
}

/* Responsive Design */
@media (max-width: 768px) {
    .mcq-section {
        padding: 1.5rem;
    }
    
    .mcq-item {
        padding: 1.25rem;
    }
    
    .mcq-options {
        grid-template-columns: 1fr;
    }
}